An alcohol conversion process

Abstract

The present invention relates to an alcohol conversion process wherein a homogenous transition metal catalyst is used. The alcohol conversion process allows for a profitable and sustainable approach to produce alcohols such as butanol in a way such that the obtained alcohol can be identified as a product of the chemical process employed.

Description

An alcohol conversion processThe present invention relates to an alcohol conversion process.A commonly used industrial production of alcohols is mainly based on an oxo process. Said process comprises the reaction of an alkene with oxo gas, which is a mixture of hydrogen and carbon monoxide in a 1 :1 molar ratio. The reaction is followed by hydrogenation of the aldehyde into the desired alcohol.An alternative process for the synthesis of alcohols is based on the Guerbet reaction, which is known for many decades (M. Guerbet, C. R. Hebd. Seances Acad. Sci. 1899, 128, p. 511-513). It is generally accepted that the mechanism leading to Guerbet alcohols comprises the following three steps: (I) dehydrogenation of a primary alcohol to the respective aldehyde; (II) aldol condensation of two aldehyde molecules to an a,p-unsaturated aldehyde with elimination of water; and (ill) hydrogenation of the unsaturated aldehyde to the dimer alcohol. An alkaline catalyst, e.g. sodium or potassium hydroxide or sodium or potassium alkoxides, is required for the Guerbet reaction. Often homogeneous or hetereogeneous metal catalysts are added to accelerate the dehydrogenation and hydrogenation steps. However, the Guerbet reaction generally suffers from harsh conditions, poor selectivity, separation issues and low yield.In the chemical industry, butanol is an important intermediate product and solvent for a broad variety of products, including paints and various plastics. Up to now, butanol is produced from a petro-based feedstock, leading to a significant product carbon footprint for butanol and the resulting products. Therefore, it is important for the chemical industry to find and open an economical and sustainable process route to butanol with a lower product carbon footprint.Ethanol may be a sustainable feedstock to produce chemicals. Using ethanol in the Guerbet reaction may be a profitable and sustainable approach to produce butanol. Whereas the Guerbet reaction is used up to date to produce higher alcohols from higher boiling alcohol feedstocks than ethanol, there is so far no industrial usage for the Guerbet reaction for ethanol as the feedstock to produce butanol. While the Guerbet reaction itself may seem a simple chemical reaction, employing ethanol as the feedstock causes inherent problems particularly concerning selectivity. Because the product, n-butanol, can itself also undergo dehydrogenation, higher alcohols often result as side products in the process, making the reaction so far not profitable on an industrial scale.During the Guerbet reaction, aromatic compounds and aldehyds may be formed as side products, which may be used to identify the formed alcohol as an alcohol produced with a Guerbet reaction, as compared to other production methods for such alcohol known in the art. This may in return help identifying and clearly distinguishing the formed alcohol as a bio-based alcohol, such as an alcohol based on sugar-containing crops, for example sugar cane and corn.US 2013 / 324770 A1 relates to a method for working up a mixture comprising at least one alcohol, furthermore at least one oil-soluble complex compound of at least one metal of the 8th, 9th or 10th group of the Periodic Table of the Elements, which is selected from complex compounds which have at least one ligand L1which is at least bidentate, where at least one coordination site of L1is a nitrogen atom, and at least one organic acid in the form of one of its salts, wherein (a) the mixture is treated with water which can comprise an alkali metal hydroxide, and (b) the salt or salts of the organic acid are extracted.WO 2005 / 087696 A1 relates to a process for the preparation of specific monoalkylene glycol monoethers by the reaction of an alcohol with an alkylene oxide in the presence of a heterogeneous catalyst in the liquid phase.EP 1 182 189 B1 relates to a method of continuously recovering n-butyl acrylate from one or more process streams in an acid-catalyzed esterification process for butyl acrylate.Y.Xie et al., "Highly efficient Process for Production of Biofuel from ethanol Catalyzed by Ruthenium Pincer Complexes”, Journal of the American Society, vol. 138, no. 29, 2016-07-18, pages 9077 to 9080, relates to a ruthenium pincer-catalyzed Guerbet-type process for the production of biofuel from ethanol.Therefore, it was an object of the present invention to provide an alcohol conversion process allowing a profitable and sustainable approach to produce alcohols such as butanol in a way such that the obtained alcohol can be identified as a product of the chemical process employed, e.g. a Guerbet reaction.The present invention thus relates to an alcohol conversion process based on the Guerbet reaction, wherein a homogenous transition metal catalyst is used. Advantageously, in the provided alcohol conversion process, the obtained alcohol can be identified as a product of the chemical process employed, e.g. a Guerbet reaction. This may advantageously allow for identifying and clearly distinguishing the formed alcohol, for example as a bio-based alcohol, such as an alcohol based on sugar-containing crops. Employing a Guerbet reaction offers the possibility to use bio-based feedstocks and to open an economical and sustainable process route to alcohols such as butanol with a lower product carbon footprint.The present invention in particular relates to an alcohol conversion process, comprising(i) providing a chemical component C comprising one or more of a catalyst, a precursor of the catalyst, a reduced form of the catalyst, and a reduced form of the precursor of the catalyst;(ii) preparing a liquid mixture ME comprising at least one alcohol R-CH2-CH2-OH with R being H or C i-C4-alkyl, a base, and the chemical component C provided in (i);(iii) subjecting the liquid mixture ME prepared in (ii) to alcohol conversion conditions in a reaction space SR and obtaining in said reaction space a reaction mixture MG comprising at least one alcohol R-CH2-CH2-(CHR-CH2)x-OH, x being an integer in the range of from 1 to 4, and a component FP comprising at least one aromatic compound havingof from 8 to 24 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, wherein the reaction space comprises the reaction mixture MG and a gas phase, wherein said alcohol conversion conditions comprise a temperature of the reaction mixture MG in the range of from 100 to 250 °C and a pressure in the reaction space SR in the range of from 1 x 105to 4 x 106Pa;(iv) separating the at least one alcohol R-CH2-CH2-(CHR-CH2)X-OH from the reaction mixture MG obtained in(iii)i wherein the base is selected from the group consisting of alkali hydroxides, alkaline earth hydroxides, alkali carbonates, alkali hydrogen carbonates, alkaline earth carbonates, alkaline hydrogen carbonates, alkali alkoxides, alkaline earth alkoxides, alkali metal amides, alkaline earth metal amides, and a mixture of two or more thereof; wherein the catalyst comprises a compound of formula (A)whereinM is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, S(=O)Ra, heteroaryl containing at least one heteroatom selected from nitrogen and sulfur, AsRaRb, SbRaRb, and a N-heterocyclic carbene represented by the structures:L3is selected from the group consisting of CO, PRaRbRc, AsRaRbRc, SbRaRbRc, SRaRb, RdCN, RdNC, N2, PF3, pyridine, and thiophene;R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit, or R1and R2or R3and R4form together with the pyridyl unit of the catalyst of formula (A) a quinolinyl unit; n Is O or 1 ;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, OH, OR, NRd2, NH3, NRd3, and Rd2NSO2Rd;Ra, Rb, Rc, Rd, R5, R6and R7are, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Ca-Cio-heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C 1-Cio-alkyl; unsubstituted or substituted Cs-Cio-aryl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; and unsubstituted or substituted Cs-Cio-heteroary I comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2 and Ci-Cio-alkyl; and X is selected from the group consisting of one, two, three, four, five, six, and seven substituents positioned at any carbon atom on the acridinyl unit, or one, two, three, four and five substituents positioned at any carbon atom on the quinolinyl unit, or one substituent positioned at the carbon atom on the pyridyl unit, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C1-C10— alkyl; the precursor of the catalyst comprising a compound of formula (A) comprises a mixture comprising a compound comprising a metal M and at least one component selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, organic carbonyl compounds, Ci-Cio-alkyl, Ci-Ci2-cycloalkyl, C2-Ci2-alkenyl, Cs-Cis-cycloalkenyl, C5- C2o-aryl, ON, CO, OH, OC(=O)CF3, OSO2CF3, hydrides, pyridines, halogenides, hydroxides, and thiophenes; and a compound of formula (H)M is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2, are, independently of each other, PRaRb, NRaRb, SRa, SH, S(=O)Ra, heteroaryl containing at least one heteroatom selected from nitrogen and sulfur, AsRaRb, SbRaRb, and a N-heterocyclic carbene represented by the structures:R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit, or R1and R2or R3and R4form together with the pyridyl unit of the catalyst of formula (A) a quinolinyl unit; n is O or 1 ;Ra, Rb, Rc, Rd, R5, R6and R7are, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2,and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Ca-Cio-heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C i-Cio-alkyl; unsubstituted or substituted Cs-Cio-aryl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; and unsubstituted or substituted Cs-Cio-heteroary I comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2 and Ci-Cio-alkyl;X is selected from the group consisting of one, two, three, four, five, six, and seven substituents positioned at any carbon atom on the acridinyl unit, or one, two, three, four and five substituents positioned at any carbon atom on the quinolinyl unit, or one substituent positioned at the carbon atom on the pyridyl unit, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl.Figure 1 illustrates the result of a GO analysis of the reaction mixture of Example 1 after 24 h and the formation of aromatic compounds during the reaction.The alcohol conversion process in accordance with the present invention preferably is an industrial process. In these embodiments, the process is thus based on the industrial scale dimensions, as compared to, for example, a setup and equipment for an experiment conducted in a laboratory. Preferably, the nominal capacity of a process to be carried out in accordance with the present invention, based on the desired product alcohol such as butanol in step (ill), is 1 kt (kiloton) or more, more preferably 10 kt or more, more preferably 50 kt or more.Preferably, in (iv), the separation the at least one alcohol R-CH2-CH2-(CHR-CH2)X-OH from the reaction mixture MG obtained in (ill) further comprises obtaining the at least one alcohol R-CH2-CH2-(CHR-CH2)X-OH and a mixture MAC comprising the chemical component C. More preferably, the process further comprises (v) recycling at least a part of the chemical component C comprised in the mixture MAC obtained according to (iv) to (ii) or (ill).The at least one aromatic compound comprised in component FP preferably has from 8 to 20 carbon atoms, more preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms.The amount of the at least one aromatic compound comprised in component FP is preferably in the range of from 0.001 to 0.5 wt.-%, more preferably in the range of from 0.001 to 0.3 wt.-%, and more preferably in the range of from 0.001 to 0.3 wt.-%, based on 100 wt.-% of the total reaction mixture MG.Preferably, component FP comprises a mixture of at least two aromatic compounds having from 8 to 20 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, more preferably a mixture of at least two aromatic compounds having from 8 to 16 carbon atoms, more preferably a mixture of at least two aromatic compounds having from 8 to 14 carbon atoms; more preferably wherein component FP comprises a mixture of at least three aromatic compoundshaving from 8 to 20 carbon atoms, more preferably a mixture of at least three aromatic compounds having from 8 to 16 carbon atoms, more preferably a mixture of at least three aromatic compounds having from 8 to 14 carbon atoms. It is also preferred that component FP further comprises at least one branched alcohol having from 8 to 20 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms; more preferably wherein component FP further comprises a mixture of at least two branched alcohols having from 8 to 20 carbon aromatic compounds, more preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms. It is moreover preferred that the amount of the at least one a branched alcohol having from 8 to 20 carbon atoms in component FP is in the range of from 0.001 to 0.5 wt.-%, more preferably in the range of from 0.001 to 0.3 wt.-%, and more preferably in the range of from 0.001 to 0.3 wt.-%, based on 100 wt.-% of the total reaction mixture MG.Preferably, R is H and component FP comprises at least one aromatic compound having 8 carbon atoms, preferably wherein R is H and wherein component FP comprises methyl-benzylalcohol. Also preferred is R being H and component FP further comprises at least one branched alcohol having 8 carbon atoms, preferably wherein R is H and wherein component FP comprises 2-ethylhexanol.In another preferred embodiment, M is Ru, and wherein the alcohol conversion conditions according to (iii) comprise a temperature of the reaction mixture MG in the range of from 100 to 170 °C, more preferably in the range of from 120 to 170 °C, more preferably in the range of from 120 to 160 °C, more preferably in the range of from 130 to 150 °C.The process of the present invention in one preferred embodiment further comprises (vi) separating component FP from the reaction mixture MAC obtained in (iv). In an even more preferred embodiment, the process further comprises (vii) analyzing the content of component FP, preferably analyzing the content of component FP via GC-MS.The process preferably is a continuous process. Alternatively, the process is preferably a semi-batch process or a batch process.The alcohol conversion conditions according to (iii) preferably comprise the presence of at least one inert gas in the reaction space SR, wherein the at least one inert gas is preferably selected from the group consisting of nitrogen, argon, and a mixture thereof.The alcohol conversion conditions according to (iii) preferably comprise a pressure in the reaction space SR in the range of from 1 x 105to 3.5 x 106Pa, more preferably in the range of from 1 x 105to 3.1 x 106Pa, more preferably in the range in the range of from 1 x 105to 2 x 106Pa, more preferably in the range in the range from 1 x 105to 1.5 x 106Pa.Preferably, the alcohol conversion conditions according to (iii) comprise a temperature of the reaction mixture MG in the range of from 100 to 200 °C, more preferably in the range of from 120 to 180 °C, more preferably in the range of from 130 to 160 °C.The alcohol conversion conditions according to (iii) preferably also comprise an amount of the base in the reaction mixture MG in the range of from 0.1 to 10 weight-%, more preferably in the range of from 0.5 to 8 weight-%, more preferably in the range of from 1 to 5 weight-%, based on the total weight of the reaction mixture MG.The alcohol conversion conditions according to (iii) preferably comprise an amount of the catalyst in the reaction mixture MG in the range of from 0.001 to 2 weight-%, more preferably in the range of from 0.001 to 1 weight-%, more preferably in the range of from 0.001 to 0.5 weight-%, based on the total weight of the reaction mixture MG.Preferably, in (iii), said gas phase comprises H2. More preferably, the H2 partial pressure of the gas phase in the reaction space SG is maintained in the range of from 2 x 104to 3.1 x 106Pa, more preferably in the range of from 2 x 104to 1 .1 x 106Pa, and more preferably in the range of from 2 x 104to 6 x 105Pa. More preferably, the H2 partial pressure of the gas phase is maintained by relaxation of the gas phase or by introducing H2 into the gas phase, or, alternatively, or in addition thereto, the H2 partial pressure of the gas phase is maintained by relaxation of the gas phase."Maintaining” the H2 partial pressure of the gas phase in the sense of the present invention includes ensuring that the H2 partial pressure is within the desired range during the reaction. In case the H2 partial pressure is within the desired range, no active steps have to be carried out mandatorily, but the pressure may still be adjusted to a different part of the range if desired. However, in order to ensure that the H2 partial pressure is neither too high nor too low, the H2 partial pressure may preferably be adjusted, or must be adjusted in case of ensuring that the H2 partial pressure is maintained within the desired range, for example by relaxation of the gas phase, in which case the H2 partial pressure may be reduced, or, alternatively, by introducing H2 into the gas phase, in which case the H2 partial pressure may be increased. Depending upon the H2 partial pressure during the reaction, one or even both of said alternatives may be carried out if desired to adjust the H2 partial pressure and to maintain the H2 partial pressure within the desired pressure range at all times during the reaction.The pressure during the reaction can be monitored by, for example, determination of the overall pressure and comparison to the starting pressure. As hydrogen tends to build up during the reaction, the H2 partial pressure changes, e.g. increases, resulting in the pressure to increase over time. For example, by actively measuring and controlling the overall pressure during the reaction, it may be ensured that the H2 partial pressure is within the claimed range. If the overall pressure built up is too high, this tends to be at least in part the result of the H2 partial pressure increasing. By relaxation of the gas phase, hydrogen can be removed from the gas phase and the H2 partial pressure can be maintained in the desired range. Thus, in one preferred embodiment, the H2 partial pressure of thegas phase is preferably maintained in the respective range by monitoring the overall pressure of the reaction and adjusting the overall pressure if required, preferably by relaxation of the gas phase, in which case the H2 partial pressure may be reduced, or, alternatively, by introducing H2 into the gas phase, in which case the H2 partial pressure may be increased.Alternatively, the hydrogen partial pressure can be determined by other means, such as taking samples of the gas phase during the reaction and analyzing same. As another alternative, the pressure may be monitored via online measurement, and adjusted accordingly as outlined above.Preferably, the liquid mixture ME prepared according to (ii) further comprises a solvent component S. The solvent component S preferably comprises a solvent which has a boiling point of 110 °C or more, preferably a boiling point of 140 °C or more, more preferably a boiling point of 160 °C or more, more preferably a boiling point of 180 °C or more, more preferably a boiling point of 190 °C or more. The solvent component S preferably comprises a solvent which has a solubility in water at 25 °C of from 0 to 0.5 weight-%, more preferably of from 0 to 0.1 weight-%, more preferably a solubility in water at 25 °C of from 0 to 0.05 weight-%, more preferably a solubility in water at 25 °C of from 0 to 0.01 weight-%, based on 100 weight-% water. It is also preferred that a distribution coefficient of the catalyst in a system of the solvent component S and water is from 0 to 0.01 , more preferably from 0 to 0.005, more preferably from 0 to 0.005, based on 1 kg catalyst.The solvent component S preferably comprises a mixture of at least two aromatic hydrocarbons with a boiling point of 180 °C or more. In another preferred embodiment, the solvent component S comprises a solvent which is selected from the group consisting of biphenyl, diphenyl ether, 1 -tert-butyl-3,5-dimethyl-benzene, ethylbenzene, cyclododecane, cyclononane, cyclooctane, cycloheptane, decaline, n-butylbutyrate, n-hexylhexyrate, n-octyloctyrate, texanole, di-n-butylether, di-iso-butylether, di-sec-butylether, and a mixture of two or more thereof, more preferably wherein the solvent is selected from the group consisting of biphenyl, diphenyl ether, and a mixture thereof, wherein more preferably, the solvent is a mixture of biphenyl and diphenyl ether.In a further preferred embodiment, the solvent component S comprises, preferably consists of, a mixture of biphenyl and diphenyl ether, preferably wherein the solvent component S comprises, preferably consists of, a mixture of biphenyl and diphenyl ether at a molar ratio of biphenyl relative to diphenyl ether in the range of from 1 :2 to 1 :6, preferably in the range of from 1 :2.5 to 1 :4.In another preferred embodiment, the solvent component S comprises, preferably consists of, a solvent does not form an azeotrope with water. Preferably, the solvent component S does not include any one of benzene, toluene, xylene or mesitylene.It is also preferred that the solvent component S comprises a mixture of at least two solvents with a boiling point of140 °C or more, more preferably with a boiling point of 160 °C or more, more preferably with a boiling point of 180 °C or more, more preferably with a boiling point of 190 °C or more.It is moreover preferred that the solvent component S comprises a solvent which is selected from the group consisting of biphenyl, diphenyl ether, 1 -tert-butyl-3,5-dimethyl-benzene, ethylbenzene, cyclododecane, cyclononane, cyclooctane, cycloheptane, decaline, n-butylbutyrate, n-hexylhexyrate, n-octyloctyrate, texanole, di-n- butylether, di-iso-butylether, di-sec-butylether, 1 -hexanol, 1 -octanol, 1 -decanol, 1 -dodedacanol, 2-ethylbutan-1-ol, 2- ethylhexan-1-ol, 2-ethyloctan-1-ol, 2-ethyldecan-1-ol, 2-ethyldodecan-1-ol, 2-butylhexan-1-ol, 2-butyloctan-1-ol, 2- butyldecan-1-ol, 2-butyldodecan-1-ol, 2-hexyldecanol, 2-octyldodecanol, 2-propylheptan-1-ol, and a mixture of two or more thereof; preferably wherein the solvent component S comprises at least one solvent selected from the group consisting of 2-ethylbutan-1-ol, 2-ethylhexan-1-ol, 2-ethyloctan-1-ol, 2-ethyldecan-1-ol, 2-ethyldodecan-1-ol, 2- butylhexan-1-ol, 2-butyloctan-1-ol, 2-butyldecan-1-ol, 2-butyldodecan-1-ol, 2-hexadecanol, 2-octyldodecanol, 2- propylheptan-1-ol, and a mixture of two or more thereof.The alcohol conversion conditions according to (iii) preferably comprise an amount of the solvent component S in the reaction mixture MG in the range of from 5 to 50 weight-%, preferably in the range of from 5 to 30 weight-%, more preferably in the range of from 5 to 10 weight-%, based on the total weight of the reaction mixture MG. Also preferred is that from 90 to 100 weight-%, more preferably from 95 to 100 weight-%, more preferably from 98 to 100 weight-%, more preferably from 99 to 100 weight-% of the liquid mixture ME prepared according to (ii) consist of the at least one alcohol R-CH2-CH2-OH, the base, the solvent component S and the at least one of a catalyst, a precursor thereof, or a reduced form of the catalyst or the precursor.In yet another preferred embodiment, the mixture MAC obtained according to (iv) comprises the chemical component C and further comprises the solvent component S. More preferred is the process further comprising (v’) recycling at least a part of the solvent component S comprised in the mixture MAC obtained according to (iv) to (ii) or (iii). Also more preferred is the process further comprising (v”) recycling at least a part of the solvent component S and at least a part of the chemical component C comprised in the mixture MAC obtained according to (iv) to (ii) or (iii).Preferably, the liquid reaction mixture MG obtained according to (iii) further comprises at least one unreacted alcohol R-CH2-CH2-OH, the process further comprising (viii) separating at least a part of said unreacted alcohol R-CH2-CH2- OH from the liquid reaction mixture MG. More preferably, separating at least a part of the unreacted alcohol R-CH2- CH2-OH from MG is carried out by distillation, extraction, flashing, or by employing a membrane. More preferred is that at least a part of the at least one unreacted alcohol R-CH2-CH2-OH separated from MG is recycled to (ii) or (iii).Preferably, in formula (A) n is 0 if R1, R2, R3and R4are hydrogen.Preferably, the reaction mixture MG in (iii) further comprises water; more preferably wherein the amount of water in reaction mixture MG is 0.2 wt.-% or less, more preferably in the range of from 0 to 0.2 wt.-%, more preferably from 0.0001 to 0.2 wt.-%, more preferably from 0.0001 to 0.15 wt.-%, more preferably from 0.0005 to 0.1 wt.-%, more preferably from 0.0005 to 0.08 wt.-%, more preferably from 0.0005 to 0.05 wt.-%, based on the total wt.-% of the reaction mixture MG. Even more preferred is that step (iii) further comprises the removal of water from the reaction mixture reaction mixture MG, preferably the continuous removal of water from the reaction mixture reaction mixture MG.The chemical component C preferably comprises a compound of formula (B)whereinM is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, and S(=O)Ra;L3is selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, pyridine, and thiophene;R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit; n is 0 or 1 , and if R1, R2, R3and R4are hydrogen, n is 0;Ra, Rb, Rcand Rdare, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; Ca-Cio-heterocycly I comprising at least one heteroatom selected from the group consisting of N, O, and S; Cs-C -aryl; and Cs-Cio-heteroaryl comprising at least one heteroatom selected from the group consisting of N, O, and S;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, and OH; and wherein for the compound of formula (L), R1, R2, R3and R4L1, L2and n are preferably identical to R1, R2, R3and R4, L1, L2and n of the catalyst of formula (B).In another preferred embodiment, the chemical component C comprises a compound of formula (C)whereinM is selected from the group consisting of Ir, Ru, and Mn;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, and S(=O)Ra;L3is selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, pyridine, and thiophene; Ra, Rb, Rcand Rdare, independently of each other, selected from the group consisting of H, unsubstituted or substituted C1-C10 alkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and C1-C10 alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C1-C10 alkyl; C3-C10 heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S; C5-C10 aryl; and C5-C10 heteroaryl comprising at least one heteroatom selected from the group consisting of N, 0, and S;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, and OH; and wherein for the compound of formula (L), R1, R2, R3and R4, L1, L2, and n are preferably identical to R1, R2, R3and R4’ L1, L2, and n of the catalyst of formula (C).It is also preferred that the chemical component C comprises a compound of formula (D)whereinM is selected from the group consisting of Ir, Ru, and Mn;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, and S(=O)Ra;L3is selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, pyridine, and thiophene;Ra, Rb, Rcand Rdare, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalky I wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; Cs-Cio-heterocycly I comprising at least one heteroatomselected from the group consisting of N, 0, and S; C5-C10 aryl; and Cs-Cio-heteroaryl comprising at least one heteroatom selected from the group consisting of N, 0, and S;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, CN, CO, and OH; and wherein for the compound of formula (L), R1, R2, R3and R4, L1, L2and n are preferably identical to R1, R2, R3and R4’ L1, L2and n of the catalyst of formula (D).M is preferably selected from the group consisting of Ir and Ru, more preferably M is Ru.L3preferably is CO. It is also preferred that L1and L2are each (PRaRb), and wherein Raand Rbare Ci-Cio-alkyl, preferably wherein Raand Rbare each isopropyl or tert-butyl. Alternatively, L1and L2preferably are each (PRaRb), and wherein Raand Rbare Ci-Cio-cycloalkyl, more preferably Raand Rbare each cyclohexyl. In another alternative embodiment, L1and L2are each (PRaRb), and Raand Rbare Cs-Cio-aryl.Preferably, Y is selected from the group consisting of F, Cl, Br and I, more preferably Y is selected from the group consisting of Cl or Br, more preferably wherein Y is Cl. In another preferred embodiment, Y is CO.Preferably, the chemical component C comprises a compound of formula (E)wherein Cy is cyclohexyl.In another preferred embodiment, the reduced form of the catalyst comprises a compound of formula (E’)wherein Cy is cyclohexyl.In a further preferred embodiment, the chemical component C comprises a compound of formula (F)wherein iPr is isopropyl.Preferably, the reduced form of the catalyst comprises a compound of formula (F’)wherein iPr is isopropyl.It is also preferred that the chemical component C comprises a compound of formula (G)wherein tBu is tert-butyl.In yet another preferred embodiment, the reduced form of the catalyst comprises a compound of formula (G’)wherein tBu is tert-butyl.Preferably, the chemical component C comprises a compound comprising a metal M selected from the group consisting of lrCI3x H20, [lr(COD)CI]2, [lr(COE)2CI]2, [lr(C2H4)2CI]2, [lr(COD)OH]2, [lr(COD)MeO]2, [lrCp*CI2], [IrCp Cl2], lr4(CO)i2, [lr(PPh3)2(CO)CI], [lr(acetylacetonate)3], and [lr(acetylacetonate)(COD)], wherein Cp iscylclopentadienyl, Cp* is pentamethylcyclopentadienyl, COD is 1 ,5-cyclooctadienyl, COE is cyclooctenyl, and methylallyl is 2-methylallyl. It is also preferred that the chemical component C comprises a compound comprising a metal M selected from the group consisting of [Ru(p-cymene)Cl2]2, [Ru(benzene)Cl2]y, [Ru(CO)2Cl2]y, where y is in each case in the range from 1 to 1000, [Ru(CO)3Cl2]2, [Ru(COD)(allyl)2], RuCh x H2O, [Ru(acetylacetonate)3], [Ru(DMSO)4Cl2], [Ru(cyclopentadienyl)(CO)2CI], [Ru(cyclopentadienyl)(CO)2H], [Ru(cyclopentadienyl)(CO)2]2, [Ru(Cp)(CO)2CI], [Ru(Cp*)(CO)2H], [Ru(Cp*)(CO)2]2, [Ru(indenyl)(CO)2CI], [Ru(indenyl)(CO)2H], [Ru(indeny l)(CO)2]2, ruthenocene, [Ru(COD)CI2]2, [Ru(Cp*)(COD)CI], [RU3(CO)I2], [Ru(PPh3)4(H)2], [Ru(PPh3)3(CI)2], [Ru(PPh3)3(CO)(CI)2], [Ru(PPh3)3(CO)(CI)(H)], [Ru(PPh3)3(CO)(H)2], and [Ru(cyclooctadienyl)(methylallyl)2], wherein Cp is cylclopentadienyl, Cp* is pentamethylcyclopentadienyl, COD is 1 ,5-cyclooctadienyl, and methylallyl is 2-methylallyl.Preferably, the reduced form of the precursor comprises a compound of formula (P-l) or (P-ll):wherein R1, R2, R3and R4either are hydrogen, or form together with the N-containing ring a tetrahydroquinoline unit, a decahydroquinoline unit, a tetrahydroacridine unit, or a tetradecahydroacridine unit; and wherein L1and L2are, independently of each other, as defined above;wherein R1, R2, R3and R4are hydrogen; and wherein L1and L2are, independently of each other, as defined above.Also preferred is that the reduced form of the precursor comprises a compound of formula (P-l):wherein R1, R2, R3and R4either are hydrogen, or form together with the N-containing ring a tetrahydroacridine unit, or a tetradecahydroacridine unit.It is furthermore preferred that the reduced form of the precursor comprises a compound of formula (P-l I):wherein R1, R2, R3and R4are hydrogen; and wherein L1and L2are, independently of each other, as defined above.Integer x preferably is 1 or 2, more preferably integer x is 1 .R is preferably selected from the group consisting of H, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, and tert-butyl, preferably from the group consisting of H, methyl, ethyl, propyl, and isopropyl, more preferably from the group consisting of H, ethyl, and propyl, wherein more preferably R is H.The liquid mixture ME prepared according to (II) preferably further comprises a compound of formula (H):wherein R1, R2, R3and R4’ L1, L2, and n are identical to R1, R2, R3and R4’ L1, L2, and n of the catalyst of formula (A). More preferred is that in the liquid mixture ME prepared according to (ii) and subjected to alcohol version conditions according to (iii), the molar ratio of the compound of formula (H) relative to the compound of formula (A) is in a range of from 0.01 :1 to 10:1 , preferably in the range of from 0.05:1 to 10:1 , more preferably in the range of from 0.1 :1 to 10:1 , more preferably in the range of from 0.1 :1 to 10:1 , more preferably in the range of from 0.3:1 to 10:1 , more preferably in the range of from 0.5:1 to 10:1 , more preferably in the range of from 0.7:1 to 10:1 , more preferably in the range of from 0.8:1 to 10:1 , more preferably in the range of from 1 :1 to 10:1 more preferably in the range of from 1.01 :1 to 10:1 , more preferably in the range of from 1.02:1 to 8:1 , more preferably in the range from 1.03:1 to 7:1 , more preferably in the range from 1 .04: 1 to 6: 1 , and more preferably in the range from 1 .05: 1 to 5: 1 .The compound of formula (H) is preferably selected from the group consisting of dicyclohexyl-[[5- (dicyclohexylphosphanylmethyl)acridin-4-yl]methyl]phosphane, diisopropyl-[[5-(diisopropylphosphanylmethyl)acridin- 4-yl]methyl]phosphane, dicyclohexyl-[[5-(dicyclohexylphosphanylmethyl)pyridin-4-yl]methyl]phosphane and diisopropy l-[[5-(diisopropy Iphosphany Imethy l)py ridin-4-yl]methy l]phosphane, preferably wherein the compound offormula (H) is cyclohexy l-[[5-(dicyclohexy Iphosphany Imethy l)acridin-4-y l]methy l]phosphane or diisopropy l-[[5- (diisopropylphosphanylmethyl)acridin-4-yl]methyl]phosphane.The base is preferably selected from the group consisting of alkali hydroxides, alkali alkoxides, and a mixture thereof. More preferably, the alkali hydroxide is selected from the group consisting of NaOH, KOH, and a mixture thereof, more preferably wherein the alkali hydroxide is KOH.Also preferred is that the alkali alkoxide is selected from the group consisting of sodium alkoxides, potassium alkoxides, and a mixture thereof, more preferably from the group consisting of sodium ethoxide, potassium ethoxide, and a mixture thereof.The at least one alcohol R-CH2-CH2-OH is preferably a bio-based alcohol, preferably obtainable or obtained from sugar-containing crops, preferably from one or more of sugar cane and corn. The employed ethanol is also preferably a bio-based alcohol obtained by alcoholic fermentation.The reaction space SR is preferably comprised in a reactor vessel, wherein the reactor vessel is preferably a complete-mixing reactor vessel.Preferably, Rband Rcis H and Rais methyl or Ra, Rband Rcis H.According to a further aspect, the present invention relates to a process, preferably to the process as described above, which comprises the step of converting a chemical material obtainable by or obtained by the process as described herein to obtain a product Q.Preferably, the product Q is selected from: building block or monomer; or polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or cleaning polymer, cleaning surfactant, descaling compound, cleaning biocide or composition or formulation thereof; or agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; orcosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.Regarding this process from which the product Q, is obtained, it is preferred: that the content of the chemical material in the product Q is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or that the content of the chemical material in the product Q is 100 weight-% or less, preferably 95 weight-% or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.The publication Prior Art Disclosure; Issue 684; paragraphs

[1000] to

[8005] ; ISSN: 2198-4786; published: February 12, 2024 will be regarded as Reference RF1, which is incorporated herein by reference in its entirety. Preferably, the product Q is a product as described in Reference RF1; paragraphs

[1000] to

[8005] , Preferably, the process described herein is further a process for the production of a product.The converting step to obtain the product Q preferably comprises one or more step(s) as described below and can be performed by conventional methods well known to a person skilled in the art. The converting step preferably comprises one or more step(s) selected from: recycling, preferably depolymerizing, gasifying, pyrolyzing, and / or steam cracking; and / or purifying, preferably crystallizing, (solvent) extracting, distilling, evaporating, hydrotreating, absorbing, adsorbing and / or subjecting to ion exchanger; and / or assembling, preferably foaming, synthesizing, chemical conversion, chemically transforming, polymerizing and / or compounding; and / or forming, preferably foaming, extruding and / or molding; and / or finishing, preferably coating and / or smoothing.In addition, the one or more step(s) are described in detail in Reference RF1; paragraphs

[1000] to

[8005] ,The term "building block”, as used in the context of the product Q herein, comprises compounds, which are in a gaseous or liquid state under standard conditions of 0 °C and 0.1 MPa. Building blocks are typically used in chemical industry to form secondary products, which provide a higher structural complexity and / or higher molecular weight than the building block on which the secondary product is based. The building block is preferably selected from thegroup consisting of hydrogen, carbon monoxide, carbon dioxid, ethylene oxide, ethylene glycols, syngas comprising a mixture of hydrogen and carbon monoxide, alkanes, alkenes, alkynes and aromatic compounds. The alkanes, alkenes, alkynes and aromatic compounds comprise in particular 1 to 12 carbon atoms, respectively.The term "monomer”, as used in the context of the product Q herein, comprises molecules, which can react with each other to form polymer chains by polymerization. The monomer is preferably selected from the group consisting of (meth)acrylic acid, salts of (meth)acrylic acid; in particular sodium, potassium and zinc salts; (meth)acrolein and (meth)acrylates. (Meth)acrylates comprising 1 to 22 carbon atoms are preferred, in particular comprising 1 to 8 carbon atoms. The terms (meth)acrylic acid, (meth)acrolein or (meth)acrylate relate to acrylic acid, acrolein or acrylate and also to methacrylic acid, methacrolein or methacrylate, where applicable. Further, the monomer can be selected from hexamethylenediamine (HMD) and adipic acid.The building block can further be an intermediate compound. The term "intermediate compound”, as used in the context of the product Q herein, comprises organic reagents, which are applied for formation of compounds with higher molecular complexity. The intermediate compound can be selected for example from the group consisting of phosgene, polyisocyanates and propylene oxide. The polyisocyanates are in particular aromatic di- and polyisocyanates, preferably toluene diisocyanate (TDI) and / or diphenylmethane diisocyanate (MDI).The building block and the monomer and typical converting step(s) to obtain the building block or monomer are described in more detail in paragraphs

[1000] to

[1012] of Reference RF1.The term "polymer A”, as used in the context of the product Q herein, comprises thermoplastic, e.g., polyamide or thermoplastic polyurethane, thermoset, e.g., polyurethane, elastomer, e.g., polybutadiene, or a copolymer or a mixture thereof and is defined in more detail in paragraphs

[2001] to

[2007] of Reference RF1 . The term "polymer composition A”, as used in the context of the product Q herein, comprises all compositions comprising a polymer as described above and one or more additive(s), e.g. reinforcement, colorant, modifier and / or flame retardant, and is defined in more detail in paragraph

[2008] of Reference RF1. The term "polymer product A”, as used in the context of the product Q herein, comprises any product comprising the polymer A and / or polymer composition A as described above and is defined in more detail in paragraphs

[2009] and

[2010] of Reference RF1. The step(s) to obtain the polymer, preferably polymer A, polymer composition, preferably polymer composition A or polymer product, preferably polymer product A is / are described in more detail in paragraph

[2011] of Reference RF1 .The term "industrial use polymer”, as used in the context of the product Q herein, comprises rheology, polycarboxylate, alkoxylated polyalkylenamine, alkoxylated polyalkylenimine, polyether-based, dye inhibition and soil release cleaning polymers defined in more detail in paragraphs

[3035] to

[3044] of Reference RF1. The term "industrial use surfactant”, as used in the context of the product Q herein, comprises non -ionic, anionic and amphoteric industrial use surfactants defined in more detail in paragraphs

[3008] to

[3034] of Reference RF1. Theterm "industrial use descaling compound”, as used in the context of the product Q herein, comprises non -phosphate based builders (NPB) and phosphonates (CoP) described in more detail in paragraphs

[3001] to

[3005] of Reference RF1 . The term "industrial use biocide”, as used in the context of the product Q herein, refers to a chemical compound that kills microorganisms or inhibits their growth or reproduction defined in more detail in paragraphs

[3006] to

[3007] of Reference RF1 . The term "industrial use solvent”, as used in the context of the product Q herein, comprises alkyl amides, alkyl lactamides, alkyl esters, lactate esters, alkyl diester, cyclic alkyl diester, cyclic carbonates, aromatic aldehydes and aromatic esters defined in more detail in paragraphs

[3045] to

[3055] of Reference RF1. The term "industrial use dispersant”, as used in the context of the product Q herein, comprises anionic and non-ionic industrial use dispersants defined in more detail in paragraphs

[3056] to

[3058] of Reference RF1 . The term "composition and / or formulation thereof” with reference to the industrial use polymers, industrial use surfactants, descaling compounds and / or industrial use biocides refers to industrial use compositions and / or institutional use products and / or fabric and home care products and / or personal care products defined in more detail in paragraph

[3059] of Reference RF1. The converting step(s) to obtain the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3060] of Reference RF1. The converting steps to obtain the industrial use composition or formulation of the industrial use polymer, industrial use surfactant, descaling compound and / or industrial use biocide are defined in more detail in paragraph

[3061] of Reference RF1.The term "agrochemical composition”, as used in the context of the product Q herein, typically relates to a composition comprising an agrochemically active ingredient and at least one agrochemical formulation auxiliary. Examples of agrochemical compositions, active ingredients and auxiliaries are described in more detail in Reference RF1, paragraph

[4001] , The agrochemical composition may take the form of any customary formulation. The agrochemical compositions are prepared in a known manner, e.g. described by Mollet and Grubemann, Formulation technology, Wiley VCH, Weinheim, 2001; or Knowles, New developments in crop protection product formulation, Agrow Reports DS243, T&F Informa, London, 2005. The converting step(s) to obtain the agrochemically active ingredients and auxiliaries may be conducted in analogy to the production step(s) of their analogues that are based on petrochemicals or other precursors that are not gained by recycling processes. In addition, conversion to compounds mentioned in sections "Polymer” and "Cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or compositions or formulations thereof' may be performed as described in these sections as well as the respective paragraphs in Reference RF1 .The term active pharmaceutical ingredients and / or intermediates thereof, as used in the context of the product Q herein, comprises substances that provide pharmacological activity or other direct effect in the diagnosis, cure, mitigation, treatment, or prevention of disease, or to affect the structure or any function of the body. Intermediates thereof are isolated products that are generated during a multi-step route of synthesis of an active pharmaceutical ingredient. The term pharmaceutical excipients, as used in the context of the product Q herein, comprises compounds or compound mixtures used in compositions for various pharmaceutical applications, which are notsubstantially pharmaceutically active on itself. Active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients are defined in more detail in paragraph

[5001] of Reference RF1. The converting step(s) to obtain the active pharmaceutical ingredients and / or intermediates thereof and pharmaceutical excipients may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms animal feed additives, human food additives, dietary supplements, as used in the context of the product Q herein, comprises Vitamins, Pro-Vitamins and active metabolites thereof including intermediates and precursors, especially Vitamin A, B, E, D, K and esters thereof, like acetate, propionate, palmitate esters or alcohols thereof like retinol or salts thereof and any combinations thereof; Tetraterpenes, especially isoprenoids like carotenoids and xanthophylls including their intermediates and precursors as well as mixtures and derivates thereof, especially beta carotene, Canthaxanthin, Citranaxanthin, Astaxanthin, Zeaxanthin, Lutein, Lycopene, Apo-carotenoids, and any combinations thereof; organic acids, especially formic acid, propionic acid and salts thereof, such as sodium, calcium or ammonium salts, and any combinations thereof, such as but not limited to mixtures of formic acid and sodium formiate, propionic acid and ammonium propionate, formic acid and propionic acid, formic acid and sodium formiate and propionic acid, propionic acid and sodium propionate and formic acid and sodium formiate; glycerides of carboxylic acids and short and medium chain fatty acids, conjugated linoleic acids, such as omega-6 fatty acid (C18:2) methyl ester and 1 ,2-propandiol and beverage stabilizers, such as polyvinylpyrrolidone-polymer or polyvinylimidazole / polyvinylpyrrolidone-copolymer. Animal feed additives, human food additives and dietary supplements are defined in more detail in paragraph

[5002] of Reference RF1. The converting step(s) to obtain the animal feed additives, human food additives, dietary supplements may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The terms aroma chemical and aroma composition as used in the context of the product Q herein, comprise a volatile organic substance with a molecular weight between 70-250 g / mol comprising a functional group with a carbon skeleton of C5-C16 carbon atoms comprising linear, branched, cyclic, for example with a ring size of C5-C18, bicyclic or tricyclic aliphatic chains and but not necessarily one or more unsaturated structural elements like double bonds, triple bonds, aromatics or heteroaromatics and preferably the one or more additional functional groups are selected from alcohol, ether, ester, ketone, aldehyde, acetal, carboxylic acid, nitrile, thiol, amine. In one aspect, the aroma chemical is a terpene-based aroma chemical, for example selected from monoterpenes and monoterpenoids, sesquiterpenes and sesquiterpenoids, diterpenes, triterpenes or tetraterpenes. Aroma chemicals can be combined with further aroma chemicals to give an aroma composition. Aroma chemicals and aroma compositions are defined in more detail in paragraph

[5003] of Reference RF1. The converting step(s) to obtain the aroma chemical and aroma composition may comprise one or more synthesis steps and can be performed by conventional synthesis and techniques well known to a person skilled in the art.The term "aqueous polymer dispersion”, as used in the context of the product Q herein, comprises aqueous composition(s) comprising dispersed polymer(s) and is defined in more detail in the section

[6001] entitled "aqueous polymer dispersion” of Reference RF1 . The dispersed polymer(s) may be selected from acrylic emulsion polymer(s), styrene acrylic emulsion polymer(s), styrene butadiene dispersion(s), aqueous dispersion(s) comprising composite particles, acrylate alkyd hybrid dispersion(s), polyurethane(s) (including UV-curable polyurethanes) and polyurethane - poly(meth)acrylate hybrid polymer(s). The term "emulsion polymer”, as used in the context of the product Q herein, comprises polymer(s) made by free-radical emulsion polymerization. Aqueous polyurethane dispersion(s) are defined in more detail in the section

[6002] entitled "Polyurethane dispersions” of Reference RF1. UV-curable polyurethane(s) is / are defined in more detail in the section

[6017] of Reference RF1. Polyurethane - poly(meth)acrylate hybrid polymer(s) is / are defined in more detail in the section

[6016] of Reference RF1.The term "polymeric dispersant”, as used in the context of the product Q herein, comprises preferably polymer(s) comprising polyether side chain, in particular polycarboxylate ether polymer(s) and polycondensation product(s) defined in more detail in paragraph

[6020] entitled "Polymeric dispersant” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polymer dispersion (s) comprising emulsion polymer(s) is / are defined in more detail in the section

[6003] entitled "Emulsion polymerization” of Reference RF1.The converting (polymerization) step(s) to obtain the aqueous polyurethane dispersion(s) is / are defined in more detail in the section

[6014] entitled "Process for the preparation of aqueous polyurethane dispersions” and section [6017)] entitled "Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” of Reference RF1 .Composition(s) and uses of aqueous polymer dispersion(s) and of polymeric dispersant(s) are defined in more detail in the following sections of Reference RF1 : section

[6004] entitled "Uses of aqueous polymer dispersions”, section

[6005] entitled "Binders for architectural and construction coatings” section

[6006] entitled "Binders for paper coating” section

[6007] entitled "Binders for fiber bonding” section

[6008] entitled "Adhesive polymers and adhesive compositions” section

[6015] entitled "Aqueous polyurethane dispersions suitable for use in coating compositions” section

[6016] entitled "Aqueous polyurethane - poly(meth)acrylate hybride polymer dispersions suitable for use in coating compositions” section

[6017] entitled "Aqueous UV-curable polyurethane dispersions, their preparation and use and compositions containing them” section

[6018] entitled "Inorganic binder compositions comprising polymeric dispersants and their use”

[6019] 100% curable coating compositionsUV-crosslinkable poly(meth)acrylate(s) and its / their uses are defined in more detail in section

[6009] entitled "UV- crosslinkable poly(meth)acrylates for use in UV-curable solvent-free hotmelt adhesives and their use for making pressure-sensitive self-adhesive articles” of Reference RF1 .Polyisocyanate(s), composition(s) comprising them and their uses are defined in more detail in section

[6010] entitled "Polyisocyanates” of Reference RF1 .Hyperbranched polyester polyol(s) and its / their uses are defined in more detail in section

[6011] entitled "Organic solvent based hyperbranched polyester polyols suitable for use in coating compositions” of Reference RF1. The converting step(s) to obtain the hyperbranched polyester polyols is / are defined in more detail in the section

[6012] entitled "Preparation of organic solvent based hyperbranched polyester polyols” of Reference RF1 . Coating composition(s) comprising hyperbranched polyester polyol(s), polyisocyanate(s) and additive(s) and substrate(s) coated therewith are defined in more detail in section

[6013] entitled "Organic solvent based two component coating compositions comprising hyperbranched polyester polyols and polyisocyanates” of Reference RF1.Unsaturated polyester polyol(s), solvent-based coating composition(s) comprising said unsaturated polyester polyol(s) and substrate(s) for coating with said coating composition(s) are defined in more detail in section

[6018] entitled "Organic solvent based coating composition comprising unsaturated polyester polyols” of Reference RF1. 100% curable coating composition(s) is / are defined in more detail in section

[6019] of Reference RF1.Polymeric dispersant(s) for inorganic binder compositions is / are defined in more detail in section

[6020] of Reference RF1. The inorganic binder composition(s) comprising the polymeric dispersants and their use are defined in more detail in section

[6021] of Reference RF1 . The converting step(s) to obtain the polymeric dispersant(s) are defined in more detail in section

[6020] of Reference RF1 . The term "inorganic binder composition” comprising the polymeric dispersant(s), as used in the context of the product Q herein, comprises preferably in particular hydraulically setting compositions and compositions comprising calcium sulfate and is defined in more detail in section

[6021] of Reference RF1 entitled "Inorganic binder compositions comprising the polymeric dispersant and their use”. Specific building material formulation(s) comprising polymeric dispersant(s) or building product(s) produced by a building material formulation comprising a polymeric dispersant are disclosed in more detail in section

[6021] of Reference RF1.The term "cosmetic surfactant”, as used in the context of the product Q herein, comprises non -ionic, anionic, cationic and amphoteric surfactants and is defined in more detail in paragraph

[7002] of Reference RF1. The term "emollient”, as used in the context of the product Q herein, refers to a chemical compound used for protecting, moisturizing, and / or lubricating the skin and is defined in more detail in paragraph

[7003] of Reference RF1 . The term "wax”, as used in the context of the product Q herein, comprises pearlizers and opacifiers and is defined in more detail in paragraph

[7004] of Reference RF1 . The term "cosmetic polymer”, as used in the context of the product Q herein,comprises any polymer that can be used as an ingredient in a cosmetic formulation and is defined in more detail in paragraph

[7005] of Reference RF1 . The term "UV filter”, as used in the context of the product Q herein, refers to a chemical compound that blocks or absorbs ultraviolet light and is defined in more detail in paragraph

[7006] of Reference RF1 . The term "further cosmetic ingredient”, as used in the context of the product Q herein, comprises any ingredient suitable for making a cosmetic formulation. Several sources disclose cosmetically acceptable ingredients. E. g. the database Cosing on the internet pages of the European Commission discloses cosmetic ingredients and the International Cosmetic Ingredient Dictionary and Handbook, edited by the Personal Care Products Council (PCPC), discloses cosmetic ingredients. The term "composition and / or formulation thereof” with reference to the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter and / or further cosmetic ingredient refers to personal care and / or cosmetic compositions or formulations defined in more detail in paragraph

[7007] of Reference RF1 . The converting step(s) to obtain the cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter or further cosmetic ingredient is / are defined in more detail in paragraph

[7008] of Reference RF1.The terms "polymer B”, "polymer composition B”, "coating composition”, "other functional composition”, "foil”, "molded body”, "coating” and "coated substrate” are well known to the person skilled in the art and are defined in more detail from paragraph

[8000] to

[8005] of Reference RF1.The present invention is further illustrated by the following set of embodiments and combinations of embodiments resulting from the dependencies and back-references as indicated. In particular, it is noted that in each instance where a range of embodiments is mentioned, for example in the context of a term such as "The process of any one of embodiments 1 to 4", every embodiment in this range is meant to be explicitly disclosed for the skilled person, i.e. the wording of this term is to be understood by the skilled person as being synonymous to "The process of any one of embodiments 1, 2, 3 and 4". Further, it is explicitly noted that the following set of embodiments represents a suitably structured part of the general description directed to preferred aspects of the present invention, and, thus, suitably supports, but does not represent the claims of the present invention.1 . An alcohol conversion process, comprising(i) providing a chemical component C comprising one or more of a catalyst, a precursor of the catalyst, a reduced form of the catalyst, and a reduced form of the precursor of the catalyst;(ii) preparing a liquid mixture ME comprising at least one alcohol R-CH2-CH2-OH with R being H or C i-C4-alkyl, a base, and the chemical component C provided in (i);(iii) subjecting the liquid mixture ME prepared in (ii) to alcohol conversion conditions in a reaction space SR and obtaining in said reaction space a reaction mixture MG comprising at least one alcohol R-CH2-CH2-(CHR-CH2)x-OH, x being an integer in the range of from 1 to 4, and a component FP comprising at least one aromatic compound having of from 8 to 24 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, wherein the reaction space comprises the reaction mixture MG and a gas phase, wherein said alcohol conversion conditions comprise atemperature of the reaction mixture MG in the range of from 100 to 250 °C and a pressure in the reaction space SR in the range of from 1 x 105to 4 x 106Pa;(iv) separating the at least one alcohol R-CH2-CH2-(CHR-CH2)X-OH from the reaction mixture MG obtained in(iii)i wherein the base is selected from the group consisting of alkali hydroxides, alkaline earth hydroxides, alkali carbonates, alkali hydrogen carbonates, alkaline earth carbonates, alkaline hydrogen carbonates, alkali alkoxides, alkaline earth alkoxides, alkali metal amides, alkaline earth metal amides, and a mixture of two or more thereof; wherein the catalyst comprises a compound of formula (A)whereinM is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, S(=O)Ra, heteroaryl containing at least one heteroatom selected from nitrogen and sulfur, AsRaRb, SbRaRb, and a N-heterocyclic carbene represented by the structures:L3is selected from the group consisting of CO, PRaRbRc, AsRaRbRc, SbRaRbRc, SRaRb, RdCN, RdNC, N2, PF3, pyridine, and thiophene;R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit, or R1and R2or R3and R4form together with the pyridyl unit of the catalyst of formula (A) a quinolinyl unit; n Is O or 1 ;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, OH, OR, NRd2, NH3, NRd3, and Rd2NSO2Rd;Ra, Rb, Rc, Rd, R5, R6and R7are, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl, wherein the substituents are selected from the groupconsisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Ca-Cio-heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C i-Cio-alkyl; unsubstituted or substituted Cs-Cio-aryl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; and unsubstituted or substituted Cs-Cio-heteroary I comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2 and Ci-Cio-alkyl; and X is selected from the group consisting of one, two, three, four, five, six, and seven substituents positioned at any carbon atom on the acridinyl unit, or one, two, three, four and five substituents positioned at any carbon atom on the quinolinyl unit, or one substituent positioned at the carbon atom on the pyridyl unit, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C1-C10— alkyl; the precursor of the catalyst comprising a compound of formula (A) comprises a mixture comprising a compound comprising a metal M and at least one component selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, organic carbonyl compounds, Ci-Cio-alkyl, Ci-Ci2-cycloalkyl, C2-Ci2-alkenyl, Cs-Cis-cycloalkenyl, C5- C2o-aryl, ON, CO, OH, OC(=O)CF3, OSO2CF3, hydrides, pyridines, halogenides, hydroxides, and thiophenes; and a compound of formula (H)M is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2, are, independently of each other, PRaRb, NRaRb, SRa, SH, S(=O)Ra, heteroaryl containing at least one heteroatom selected from nitrogen and sulfur, AsRaRb, SbRaRb, and a N-heterocyclic carbene represented by the structures:R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit, or R1and R2or R3and R4form together with the pyridyl unit of the catalyst of formula (A) a quinolinyl unit; n Is O or 1;Ra, Rb, Rc, Rd, R5, R6and R7are, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Cs-Cio-heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected fromthe group consisting of F, Cl, Br, OH, ON, NH2, and C i-Cio-alkyl; unsubstituted or substituted Cs-Cio-aryl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; and unsubstituted or substituted Cs-Cio-heteroary I comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2 and Ci-Cio-alkyl;X is selected from the group consisting of one, two, three, four, five, six, and seven substituents positioned at any carbon atom on the acridinyl unit, or one, two, three, four and five substituents positioned at any carbon atom on the quinolinyl unit, or one substituent positioned at the carbon atom on the pyridyl unit, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl.2. The process of embodiment 1 , wherein in (iv), the separation the at least one alcohol R-CH2-CH2-(CHR- CH2)X-OH from the reaction mixture MG obtained in (ill) further comprises obtaining the at least one alcohol R-CH2- CH2-(CHR-CH2)X-OH and a mixture MAC comprising the chemical component C.3. The process of embodiment 2, further comprising(v) recycling at least a part of the chemical component 0 comprised in the mixture MAC obtained according to (iv) to (ii) or (ill).4. The process of any one of embodiments 1 to 3, wherein the at least one aromatic compound comprised in component FP has from 8 to 20 carbon atoms, more preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms.5. The process of any one of embodiments 1 to 4, wherein the amount of the at least one aromatic compound comprised in component FP is in the range of from 0.001 to 0.5 wt.-%, preferably in the range of from 0.001 to 0.3 wt.-%, more preferably in the range of from 0.001 to 0.3 wt.-%, based on 100 wt.-% of the total reaction mixture MG.6. The process of any one of embodiments 1 to 5, wherein component FP comprises a mixture of at least two aromatic compounds having from 8 to 20 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, more preferably a mixture of at least two aromatic compounds having from 8 to 16 carbon atoms, more preferably a mixture of at least two aromatic compounds having from 8 to 14 carbon atoms; more preferably wherein component FP comprises a mixture of at least three aromatic compounds having from 8 to 20 carbon atoms, more preferably a mixture of at least three aromatic compounds having from 8 to 16 carbon atoms, more preferably a mixture of at least three aromatic compounds having from 8 to 14 carbon atoms.7. The process of any one of embodiments 1 to 6, wherein component FP further comprises at least one branched alcohol having from 8 to 20 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms; more preferably wherein component FPfurther comprises a mixture of at least two branched alcohols having from 8 to 20 carbon aromatic compounds, more preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms.8. The process of embodiment 7, wherein the amount of the at least one a branched alcohol having from 8 to 20 carbon atoms in component FP is in the range of from 0.001 to 0.5 wt.-%, preferably in the range of from 0.001 to 0.3 wt.-%, more preferably in the range of from 0.001 to 0.3 wt.-%, based on 100 wt.-% of the total reaction mixture MG.9. The process of any one of embodiments 1 to 8, wherein R is H and component FP comprises at least one aromatic compound having 8 carbon atoms, preferably wherein R is H and wherein component FP comprises methylbenzylalcohol.10. The process of any one of embodiments 1 to 9, wherein R is H and component FP further comprises at least one branched alcohol having 8 carbon atoms, preferably wherein R is H and wherein component FP comprises 2- ethylhexanol.11 . The process of any one of embodiments 1 to 10, wherein M is Ru, and wherein the alcohol conversion conditions according to (ill) comprise a temperature of the reaction mixture MG in the range of from 100 to 170 °C, preferably in the range of from 120 to 170 °C, more preferably in the range of from 120 to 160 °C, more preferably in the range of from 130 to 150 °C.12. The process of any one of embodiments 1 to 11, further comprising(vi) separating component FP from the reaction mixture MAC obtained in (iv).13. The process of embodiment 12, further comprising (vii) analyzing the content of component FP, preferably analyzing the content of component FP via GC-MS.14. The process of any one of embodiments 1 to 13, wherein the process is a continuous process.15. The process of any one of embodiments 1 to 13, wherein the process is a semi-batch process or a batch process.16. The process of any one of embodiments 1 to 15, wherein the alcohol conversion conditions according to (ill) comprise the presence of at least one inert gas in the reaction space SR, wherein the at least one inert gas is preferably selected from the group consisting of nitrogen, argon, and a mixture thereof.17. The process of any one of embodiments 1 to 16, wherein the alcohol conversion conditions according to (ill) comprise a pressure in the reaction space SR in the range of from 1 x 105to 3.5 x 106Pa, preferably in the range of from 1 x 105to 3.1 x 106Pa, more preferably in the range in the range of from 1 x 105to 2 x 106Pa, more preferably in the range in the range from 1 x 105to 1 .5 x 106Pa.18. The process of any one of embodiments 1 to 17, wherein the alcohol conversion conditions according to (ill) comprise a temperature of the reaction mixture MG in the range of from 100 to 200 °C, preferably in the range of from 120 to 180 °C, more preferably in the range of from 130 to 160 °C.19. The process of any one of embodiments 1 to 18, wherein the alcohol conversion conditions according to (ill) comprise an amount of the base in the reaction mixture MG in the range of from 0.1 to 10 weight-%, preferably in the range of from 0.5 to 8 weight-%, more preferably in the range of from 1 to 5 weight-%, based on the total weight of the reaction mixture MG.20. The process of any one of embodiments 1 to 19, wherein the alcohol conversion conditions according to (ill) comprise an amount of the catalyst in the reaction mixture MG in the range of from 0.001 to 2 weight-%, preferably in the range of from 0.001 to 1 weight-%, more preferably in the range of from 0.001 to 0.5 weight-%, based on the total weight of the reaction mixture MG.21 . The process of any one of embodiments 1 to 20, wherein in (ill), said gas phase comprises H2, preferably wherein the H2 partial pressure of the gas phase in the reaction space SG is maintained in the range of from 2 x 104to 3.1 x 106Pa, preferably in the range of from 2 x 104to 1.1 x 106Pa, more preferably in the range of from 2 x 104to 6 x 105Pa.22. The process of embodiment 21 , wherein the H2 partial pressure of the gas phase is maintained by relaxation of the gas phase or by introducing H2 into the gas phase.23. The process of embodiment 21 , wherein the H2 partial pressure of the gas phase is maintained by relaxation of the gas phase.24. The process of any one of embodiments 1 to 23, wherein the liquid mixture ME prepared according to (ii) further comprises a solvent component S.25. The process of embodiment 24, wherein the solvent component S comprises a solvent which has a boiling point of 110 °C or more, preferably a boiling point of 140 °C or more, more preferably a boiling point of 160 °C or more, more preferably a boiling point of 180 °C or more, more preferably a boiling point of 190 °C or more.26. The process of embodiment 24 or 25, wherein the solvent component S comprises a solvent which has a solubility in water at 25 °C of from 0 to 0.5 weight-%, preferably of from 0 to 0.1 weight-%, more preferably a solubility in water at 25 °C of from 0 to 0.05 weight-%, more preferably a solubility in water at 25 °C of from 0 to 0.01 weight-%, based on 100 weight-% water.27. The process of any one of embodiments 24 to 26, wherein a distribution coefficient of the catalyst in a system of the solvent component S and water is from 0 to 0.01 , preferably from 0 to 0.005, more preferably from 0 to 0.005, based on 1 kg catalyst.28. The process of any one of embodiments 24 to 27, wherein the solvent component S comprises a mixture of at least two aromatic hydrocarbons with a boiling point of 180 °C or more.29. The process of any one of embodiments 24 to 28, wherein the solvent component S comprises a solvent which is selected from the group consisting of biphenyl, diphenyl ether, 1 -tert-butyl-3,5-dimethyl-benzene, ethylbenzene, cyclododecane, cyclononane, cyclooctane, cycloheptane, decaline, n-butylbutyrate, n-hexylhexyrate, n-octyloctyrate, texanole, di-n-butylether, di-iso-butylether, di-sec-butylether, and a mixture of two or more thereof, preferably wherein the solvent is selected from the group consisting of biphenyl, diphenyl ether, and a mixture thereof, wherein more preferably, the solvent is a mixture of biphenyl and diphenyl ether.30. The process of any one of embodiments 24 to 29, wherein the solvent component S comprises, preferably consists of, a mixture of biphenyl and diphenyl ether, preferably wherein the solvent component S comprises, preferably consists of, a mixture of biphenyl and diphenyl ether at a molar ratio of biphenyl relative to diphenyl ether in the range of from 1 :2 to 1 :6, preferably in the range of from 1 :2.5 to 1 :4.31 . The process of any one of embodiments 24 to 30, wherein the solvent component S comprises, preferably consists of, a solvent does not form an azeotrope with water.32. The process of any one of embodiments 24 to 31 , wherein the solvent component S does not include any one of benzene, toluene, xylene or mesitylene.33. The process of any one of embodiments 24 to 32, wherein the alcohol conversion conditions according to (ill) comprise an amount of the solvent component S in the reaction mixture MG in the range of from 5 to 50 weight-%, preferably in the range of from 5 to 30 weight-%, more preferably in the range of from 5 to 10 weight-%, based on the total weight of the reaction mixture MG.34. The process of any one of embodiments 24 to 33, wherein from 90 to 100 weight-%, preferably from 95 to 100 weight-%, more preferably from 98 to 100 weight-%, more preferably from 99 to 100 weight-% of the liquidmixture ME prepared according to (ii) consist of the at least one alcohol R-CH2-CH2-OH, the base, the solvent component S and the at least one of a catalyst, a precursor thereof, or a reduced form of the catalyst or the precursor.35. The process of any one of embodiments 24 to 34, wherein the mixture MAC obtained according to (iv) comprises the chemical component C and further comprises the solvent component S.36. The process of embodiment 35, further comprising(v’) recycling at least a part of the solvent component S comprised in the mixture MAC obtained according to (iv) to (II) or (ill).37. The process of embodiment 35 or 36, further comprising(v”) recycling at least a part of the solvent component S and at least a part of the chemical component C comprised in the mixture MAC obtained according to (iv) to (II) or (ill).38. The process of any one of embodiments 1 to 37, wherein the liquid reaction mixture MG obtained according to (ill) further comprises at least one unreacted alcohol R-CH2-CH2-OH, the process further comprising(viii) separating at least a part of said unreacted alcohol R-CH2-CH2-OH from the liquid reaction mixture MG.39. The process of embodiment 38, wherein separating at least a part of the unreacted alcohol R-CH2-CH2-OH from MG is carried out by distillation, extraction, flashing, or by employing a membrane.40. The process of embodiment 38 or 39, wherein at least a part of the at least one unreacted alcohol R-CH2- CH2-OH separated from MG is recycled to (II) or (ill).41 . The process of any one of embodiments 1 to 40, wherein in formula (A) n is 0 if R1, R2, R3and R4are hydrogen.42. The process of any one of embodiments 1 to 41 , wherein the reaction mixture Me in (ill) further comprises water; preferably wherein the amount of water in reaction mixture MG is 0.2 wt.-% or less, more preferably in the range of from 0 to 0.2 wt.-%, more preferably from 0.0001 to 0.2 wt.-%, more preferably from 0.0001 to 0.15 wt.-%, more preferably from 0.0005 to 0.1 wt.-%, more preferably from 0.0005 to 0.08 wt.-%, more preferably from 0.0005 to 0.05 wt.-%, based on the total wt.-% of the reaction mixture MG.43. The process of embodiment 42, wherein step (ill) further comprises the removal of water from the reaction mixture reaction mixture MG, preferably the continuous removal of water from the reaction mixture reaction mixture MG.44. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound of formula (B)whereinM is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, and S(=O)Ra;L3is selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, pyridine, and thiophene;R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit; n is 0 or 1 , and if R1, R2, R3and R4are hydrogen, n is 0;Ra, Rb, Rcand Rdare, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; Ca-Cio-heterocycly I comprising at least one heteroatom selected from the group consisting of N, 0, and S; Cs-C -aryl; and Cs-Cio-heteroaryl comprising at least one heteroatom selected from the group consisting of N, 0, and S;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, and OH; and wherein for the compound of formula (L), R1, R2, R3and R4L1, L2and n are preferably identical to R1, R2, R3and R4, L1, L2and n of the catalyst of formula (B).45. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound of formula (C)whereinM is selected from the group consisting of Ir, Ru, and Mn;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, and S(=O)Ra;L3is selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, pyridine, and thiophene; Ra, Rb, Rcand Rdare, independently of each other, selected from the group consisting of H, unsubstituted or substituted C1-C10 alkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C1-C10 alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C1-C10 alkyl; C3-C10 heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S; C5-C10 aryl; and C5-C10 heteroaryl comprising at least one heteroatom selected from the group consisting of N, 0, and S;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, and OH; and wherein for the compound of formula (L), R1, R2, R3and R4, L1, L2, and n are preferably identical to R1, R2, R3and R4’ L1, L2, and n of the catalyst of formula (C).46. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound of formula (D)whereinM is selected from the group consisting of Ir, Ru, and Mn;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, and S(=O)Ra;L3is selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, pyridine, and thiophene;Ra, Rb, Rcand Rdare, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; Cs-Cio-heterocycly I comprising at least one heteroatom selected from the group consisting of N, 0, and S; C5-C10 aryl; and Cs-Cio-heteroaryl comprising at least one heteroatom selected from the group consisting of N, 0, and S;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, and OH; and wherein for the compound of formula (L), R1, R2, R3and R4, L1, L2and n are preferably identical to R1, R2, R3and R4’ L1, L2and n of the catalyst of formula (D).47. The process of any one of embodiments 1 to 46, wherein M is selected from the group consisting of Ir and Ru, preferably wherein M is Ru.48. The process of any one of embodiments 1 to 47, wherein L3is CO.49. The process of any one of embodiments 1 to 48, wherein L1and L2are each (PRaRb), and wherein Raand Rbare Ci-C -alkyl, preferably wherein Raand Rbare each isopropyl or tert-butyl.50. The process of any one of embodiments 1 to 48, wherein L1and L2are each (PRaRb), and wherein Raand Rbare Ci-Cio-cycloalkyl, preferably wherein Raand Rbare each cyclohexyl.51 . The process of any one of embodiments 1 to 48, wherein L1and L2are each (PRaRb), and wherein Raand Rbare Cs-C -aryl.52. The process of any one of embodiments 1 to 51 , wherein Y is selected from the group consisting of F, Cl, Br and I, preferably wherein Y is selected from the group consisting of Cl or Br, more preferably wherein Y is Cl.53. The process of any one of embodiments 1 to 51 , wherein Y is CO.54. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound of formula (E)wherein Cy is cyclohexyl.55. The process of any one of embodiments 1 to 43, wherein the reduced form of the catalyst comprises a compound of formula (E’)wherein Cy is cyclohexyl.56. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound of formula (F)wherein IPr is isopropyl.57. The process of any one of embodiments 1 to 43, wherein the reduced form of the catalyst comprises a compound of formula (F’)wherein iPr is isopropyl.58. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound of formula (G)wherein tBu is tert-butyl.59. The process of any one of embodiments 1 to 43, wherein the reduced form of the catalyst comprises a compound of formula (G’)wherein tBu is tert-butyl.60. The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound comprising a metal M selected from the group consisting of lrCI3x H2O, [lr(COD)CI]2, [lr(COE)2CI]2, [lr(C2H4)2CI]2, [lr(COD)OH]2, [lr(COD)MeO]2, [lrCp*CI2], [IrCp Cl2], lr4(CO)i2, [lr(PPh3)2(CO)CI], [lr(acetylacetonate)3], and [lr(acetylacetonate)(COD)], wherein Cp is cylclopentadienyl, Cp* is pentamethylcyclopentadienyl, COD is 1 ,5- cyclooctadienyl, COE is cyclooctenyl, and methylallyl is 2-methylallyl.61 . The process of any one of embodiments 1 to 43, wherein the chemical component C comprises a compound comprising a metal M selected from the group consisting of [Ru(p-cymene)Cl2]2, [Ru(benzene)Cl2]y, [Ru(CO)2Cl2]y, where y is in each case in the range from 1 to 1000, [Ru(CO)3Cl2]2, [Ru(COD)(allyl)2], RuCI3x H2O, [Ru(acetylacetonate)3], [Ru(DMSO)4Cl2], [Ru(cyclopentadienyl)(CO)2CI], [Ru(cyclopentadienyl)(CO)2H], [Ru(cyclopentadienyl)(CO)2]2, [Ru(Cp)(CO)2CI], [Ru(Cp*)(CO)2H], [Ru(Cp*)(CO)2]2, [Ru(indenyl)(CO)2CI], [Ru(indenyl)(CO)2H], [Ru(indenyl)(CO)2]2, ruthenocene, [Ru(COD)CI2]2, [Ru(Cp*)(COD)CI], [Ru3(CO)i2], [Ru(PPh3)4(H)2], [Ru(PPh3)3(CI)2], [Ru(PPh3)3(CO)(CI)2], [Ru(PPh3)3(CO)(CI)(H)], [Ru(PPh3)3(CO)(H)2], and [Ru(cyclooctadienyl)(methylallyl)2], wherein Cp is cylclopentadienyl, Cp* is pentamethylcyclopentadienyl, COD is 1 ,5- cyclooctadienyl, and methylallyl is 2-methylallyl.62. The process of any one of embodiments 1 to 61 , wherein the reduced form of the precursor comprises a compound of formula (P-l) or (P-ll):wherein R1, R2, R3and R4either are hydrogen, or form together with the N-containing ring a tetrahydroquinoline unit, a decahydroquinoline unit, a tetrahydroacridine unit, or a tetradecahydroacridine unit; and wherein L1and L2are, independently of each other, as defined above;wherein R1, R2, R3and R4are hydrogen; and wherein L1and L2are, independently of each other, as defined above.-se es. The process of any one of embodiments 1 to 62, wherein the reduced form of the precursor comprises a compound of formula (P-l):wherein R1, R2, R3and R4either are hydrogen, or form together with the N-containing ring a tetrahydroacridine unit, or a tetradecahydroacridine unit.64. The process of any one of embodiments 1 to 62, wherein the reduced form of the precursor comprises a compound of formula (P-ll):wherein R1, R2, R3and R4are hydrogen; and wherein L1and L2are, independently of each other, as defined above.65. The process of any one of embodiments 1 to 64, wherein integer x is 1 or 2, preferably wherein integer x is 1.66. The process of any one of embodiments 1 to 65, wherein R is selected from the group consisting of H, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, and tert-butyl, preferably from the group consisting of H, methyl, ethyl, propyl, and isopropyl, more preferably from the group consisting of H, ethyl, and propyl, wherein more preferably R is H.67. The process of any one of embodiments 1 to 66, wherein the liquid mixture ME prepared according to (II) further comprises a compound of formulawherein R1, R2, R3and R4’ L1, L2, and n are identical to R1, R2, R3and R4’ L1, L2, and n of the catalyst of formula (A).68. The process of embodiment 67, wherein in the liquid mixture ME prepared according to (ii) and subjected to alcohol version conditions according to (ill), the molar ratio of the compound of formula (H) relative to the compound of formula (A) is in a range of from 0.01 :1 to 10:1 , preferably in the range of from 0.05:1 to 10:1 , more preferably in the range of from 0.1 :1 to 10:1 , more preferably in the range of from 0.1 :1 to 10:1 , more preferably in the range of from 0.3:1 to 10:1 , more preferably in the range of from 0.5:1 to 10:1 , more preferably in the range of from 0.7:1 to 10:1 , more preferably in the range of from 0.8:1 to 10:1 , more preferably in the range of from 1 :1 to 10:1 more preferably in the range of from 1.01 :1 to 10:1 , more preferably in the range of from 1.02:1 to 8:1 , more preferably in the range from 1.03:1 to 7:1 , more preferably in the range from 1.04:1 to 6:1 , and more preferably in the range from 1.05:1 to 5:1.69. The process of embodiment 67 or 68, wherein the compound of formula (H) is selected from the group consisting of dicyclohexyl-[[5-(dicyclohexylphosphanylmethyl)acridin-4-yl]methyl]phosphane, diisopropyl-[[5- (diisopropylphosphanylmethyl)acridin-4-yl]methyl]phosphane, dicyclohexyl-[[5- (dicyclohexylphosphanylmethyl)pyridin-4-yl]methyl]phosphane and diisopropyl-[[5- (diisopropylphosphanylmethyl)pyridin-4-yl]methyl]phosphane, preferably wherein the compound of formula (H) is cyclohexyl-[[5-(dicyclohexylphosphanylmethyl)acridin-4-yl]methyl]phosphane or diisopropyl-[[5- (diisopropylphosphanylmethyl)acridin-4-yl]methyl]phosphane.70. The process of any one of embodiments 1 to 69, wherein the base is selected from the group consisting of alkali hydroxides, alkali alkoxides, and a mixture thereof.71. The process of embodiment 70, wherein the alkali hydroxide is selected from the group consisting of NaOH, KOH, and a mixture thereof, preferably wherein the alkali hydroxide is KOH.72. The process of embodiment 70, wherein the alkali alkoxide is selected from the group consisting of sodium alkoxides, potassium alkoxides, and a mixture thereof, preferably from the group consisting of sodium ethoxide, potassium ethoxide, and a mixture thereof.73. The process of any one of embodiments 1 to 72, wherein the at least one alcohol R-CH2-CH2-OH is a biobased alcohol, preferably obtainable or obtained from sugar-containing crops, preferably from one or more of sugar cane and corn.74. The process of any one of embodiments 1 to 73, wherein the reaction space SR is comprised in a reactor vessel, wherein the reactor vessel is preferably a complete-mixing reactor vessel.75. A process, preferably according to any one of embodiments 1 to 74, comprising the step of converting a chemical material obtainable by or obtained by the process according to any one of embodiments 1 to 74 to obtain a product Q.76. The process of embodiment 75, wherein the product Q is selected from: building block or monomer; or polymer, preferably polymer A, polymer composition, preferably polymer composition A, or polymer product, preferably polymer product A; or cleaning polymer, cleaning surfactant, descaling compound, cleaning biocide or composition or formulation thereof; or agrochemical composition, agrochemical formulation auxiliary or agrochemically active ingredient; or active pharmaceutical ingredient or intermediate thereof, pharmaceutical excipient, animal feed additive, human food additive, dietary supplements, aroma chemical or aroma composition; or aqueous polymer dispersion, preferably polyurethane or polyurethane - poly(meth)acrylate hybrid polymer dispersion, emulsion, binder for paper and fiber coatings, UV-curable acrylic polymer for hot melts and coatings polyisocyanates, hyperbranched polyester polyol, polymeric dispersant for inorganic binder compositions, unsaturated polyester polyol or 100% curable composition; or cosmetic surfactant, emollient, wax, cosmetic polymer, UV filter, further cosmetic ingredient or composition or formulation thereof; or polymer B, polymer composition B, coating composition, other functional composition, foil, molded body, coating or coated substrate.77. The process of embodiment 76, wherein the content of the chemical material in the product Q is 1 weight-% or more, preferably 2 weight-% or more, more preferably 5 weight-% or more, more preferably 15 weight-% or more, more preferably 30 weight-% or more, more preferably 40 weight-% or more, more preferably 60 weight-% or more, more preferably 80 weight-% or more, more preferably 90 weight-% or more, more preferably 95 weight-% or more; and / or wherein the content of the chemical material in the product Q is 100 weight-% or less, preferably 95 weight- % or less, more preferably 90 weight-% or less, more preferably 50 weight-% or less, more preferably 25 weight-% or less, more preferably 10 weight-% or less; and preferably wherein the content is determined based on identity preservation and / or segregation and / or mass balance and / or book and claim chain of custody models, preferably based on mass balance, preferably the International Sustainability and Carbon Certification (ISCC) standard.The present invention is further illustrated by the following examples, which are set forth to illustrate certain aspects of the present invention and are not to be construed as limiting thereof.ExamplesThe determination of the distribution coefficient of the solvent in water comprises the following steps:1. combining the two components, e.g. feed and solvent, in a predefined solvent ratio;2. turbulent mixing of the combined components over a longer period of time (> 10 min) at a defined extraction temperature;3. allowing for phase separation;4. taking samples of each phase at the extraction temperature;5. centrifuging the samples and withdrawing clear samples at the extraction temperature;6. analyzing the samples; and7. comparing the results of extract- and raffinate - calculation of the partition equilibrium / partition coefficient at the selected temperature.Example 1 :52.03 g Ethanol, 5.26 g potassium hydroxide solution (50 wt.-% in water), 93.5 mg Ru(acac)3, 281.8 mg Cy-Acr-PNP were weighed into a screw thread bottle and stirred overnight at room temperature. The reactant suspension was poured into an 300 mL autoclave using a syringe in a countercurrent flow of the starting material, and the screw- threaded bottle was rinsed with 20 g ethanol. Then, 8.06 g diphenyl and diphenyl ether were added as solvent in a molar ratio of 1 :3. The reaction mixture was heated to 150 °C with 750 rpm stirring. The overpressure was controlled at 10 bar throughout the experiment. After reaching the reaction temperature of 150 °C, a "zero sample" was taken, filtered through a 2 pm syringe filter, the sample was spiked with the internal standard 1 ,4-dioxane and analyzed by GC. Further samples were taken after 1 , 2, 3, 6 and 24 h and processed I analyzed analogously.Figure 1 shows the result of the GC analysis of the reaction mixture after 24 h. The smaller GC spectrum in the upper right corner shows the overall spectrum for comparison of the peak hights, while the bigger spectrum has been magnified for a better comparison of the small peaks. The largest peaks to the left are associated with ethanol as unreacted educt, and butanol as the desired product of the reaction. Some of the smaller peaks can be associated with the formation of aromatic compounds. For example, peak "1” relates to an aromatic compound, e.g. methylbenzylalcohol. This shows the formation of component FP during the reaction, which allows for identification of the obtained product as an alcohol obtained with a Guerbet reaction.Cited literature:M. Guerbet, C. R. Hebd. Seances Acad. Sci. 1899, 128, p. 511 -513US 2013 / 324770 A1WO 2005 / 087696 A1EP 1 182 189 B1Y.Xie et al., "Highly efficient Process for Production of Biofuel from ethanol Catalyzed by Ruthenium Pincer Complexes”, Journal of the American Society, vol. 138, no. 29, 2016-07-18, pages 9077 to 9080

Claims

Claims1 . An alcohol conversion process, comprising(i) providing a chemical component C comprising one or more of a catalyst, a precursor of the catalyst, a reduced form of the catalyst, and a reduced form of the precursor of the catalyst;(ii) preparing a liquid mixture ME comprising at least one alcohol R-CH2-CH2-OH with R being H or C i-C4-alkyl, a base, and the chemical component C provided in (i);(iii) subjecting the liquid mixture ME prepared in (ii) to alcohol conversion conditions in a reaction space SR and obtaining in said reaction space a reaction mixture MG comprising at least one alcohol R-CH2-CH2-(CHR-CH2)x-OH, x being an integer in the range of from 1 to 4, and a component FP comprising at least one aromatic compound having of from 8 to 24 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH, wherein the reaction space comprises the reaction mixture MG and a gas phase, wherein said alcohol conversion conditions comprise a temperature of the reaction mixture MG in the range of from 100 to 250 °C and a pressure in the reaction space SR in the range of from 1 x 105to 4 x 106Pa;(iv) separating the at least one alcohol R-CH2-CH2-(CHR-CH2)X-OH from the reaction mixture MG obtained in (iii); wherein the base is selected from the group consisting of alkali hydroxides, alkaline earth hydroxides, alkali carbonates, alkali hydrogen carbonates, alkaline earth carbonates, alkaline hydrogen carbonates, alkali alkoxides, alkaline earth alkoxides, alkali metal amides, alkaline earth metal amides, and a mixture of two or more thereof; wherein the catalyst comprises a compound of formula (A)whereinM is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2are, independently of each other, PRaRb, NRaRb, SRa, SH, S(=O)Ra, heteroaryl containing at least one heteroatom selected from nitrogen and sulfur, AsRaRb, SbRaRb, and a N-heterocyclic carbene represented by the structures:L3is selected from the group consisting of CO, PRaRbRc, AsRaRbRc, SbRaRbRc, SRaRb, RdCN, RdNC, N2, PF3, pyridine, and thiophene;R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit, or R1and R2or R3and R4form together with the pyridyl unit of the catalyst of formula (A) a quinolinyl unit; n Is O or 1 ;Y is selected from the group consisting of H, F, Cl, Br, I, OC(=O)CF3, OSO2CF3, ON, CO, OH, OR, NRd2, NH3, NRd3, and Rd2NSO2Rd;Ra, Rb, Rc, Rd, R5, R6and R7are, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-Cio-alkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-Cio-cycloalkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Cs-Cio-heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C i-Cio-alkyl; unsubstituted or substituted Cs-Cio-aryl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; and unsubstituted or substituted Cs-Cio-heteroary I comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2 and Ci-Cio-alkyl; and X is selected from the group consisting of one, two, three, four, five, six, and seven substituents positioned at any carbon atom on the acridinyl unit, or one, two, three, four and five substituents positioned at any carbon atom on the quinolinyl unit, or one substituent positioned at the carbon atom on the pyridyl unit, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C1-C10— alkyl; the precursor of the catalyst comprising a compound of formula (A) comprises a mixture comprising a compound comprising a metal M and at least one component selected from the group consisting of CO, PRaRbRc, SRaRb, RaCN, RaNC, N2, PF3, organic carbonyl compounds, Ci-Cio-alkyl, Ci-Ci2-cycloalkyl, C2-Ci2-alkenyl, Cs-Cis-cycloalkenyl, C5- C2o-aryl, ON, CO, OH, OC(=O)CF3, OSO2CF3, hydrides, pyridines, halogenides, hydroxides, and thiophenes; and a compound of formula (H)M is selected from the group consisting of Ir, Mn, Os, Pd, Pt, Rh, and Ru;L1and L2, are, independently of each other, PRaRb, NRaRb, SRa, SH, S(=O)Ra, heteroaryl containing at least one heteroatom selected from nitrogen and sulfur, AsRaRb, SbRaRb, and a N-heterocyclic carbene represented by the structures:R1, R2, R3and R4either are hydrogen, or form together with the pyridyl unit of the catalyst of formula (A) an acridinyl unit, or R1and R2or R3and R4form together with the pyridyl unit of the catalyst of formula (A) a quinolinyl unit; n is O or 1 ;Ra, Rb, Rc, Rd, R5, R6and R7are, independently of each other, selected from the group consisting of H, unsubstituted or substituted Ci-C -alkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH 2, and Ci-Cio-alkyl; unsubstituted or substituted Ci-C -cycloalkyl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; unsubstituted or substituted Ca-Cio-heterocyclyl comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and C 1-Cio-alkyl; unsubstituted or substituted Cs-Cio-aryl, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl; and unsubstituted or substituted Cs-Cio-heteroary I comprising at least one heteroatom selected from the group consisting of N, 0, and S, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2 and Ci-Cio-alkyl;X is selected from the group consisting of one, two, three, four, five, six, and seven substituents positioned at any carbon atom on the acridinyl unit, or one, two, three, four and five substituents positioned at any carbon atom on the quinolinyl unit, or one substituent positioned at the carbon atom on the pyridyl unit, wherein the substituents are selected from the group consisting of F, Cl, Br, OH, ON, NH2, and Ci-Cio-alkyl.

2. The process of claim 1 , wherein in (iv), the separation the at least one alcohol R-CH2-CH2-(CHR-CH2)x-OH from the reaction mixture MG obtained in (iii) further comprises obtaining the at least one alcohol R-CH2-CH2-(CHR- CH2)X-OH and a mixture MAC comprising the chemical component C.

3. The process of claim 2, further comprising(v) recycling at least a part of the chemical component 0 comprised in the mixture MAC obtained according to (iv) to (ii) or (iii).

4. The process of any one of claims 1 to 3, wherein the at least one aromatic compound comprised in component FP has from 8 to 20 carbon atoms, more preferably from 8 to 16 carbon atoms, more preferably from 8 to 14 carbon atoms.

5. The process of any one of claims 1 to 4, wherein the amount of the at least one aromatic compound comprised in component FP is in the range of from 0.001 to 0.5 wt.-%, based on 100 wt.-% of the total reaction mixture MG.

6. The process of any one of claims 1 to 5, wherein component FP comprises a mixture of at least two aromatic compounds having from 8 to 20 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH.

7. The process of any one of claims 1 to 6, wherein component FP further comprises at least one branched alcohol having from 8 to 20 carbon atoms formed from the at least one alcohol R-CH2-CH2-OH.

8. The process of any one of claims 1 to 7, wherein R is H and component FP comprises at least one aromatic compound having 8 carbon atoms, preferably wherein R is H and wherein component FP comprises methylbenzylalcohol.

9. The process of any one of claims 1 to 8, wherein the alcohol conversion conditions according to (ill) comprise a pressure in the reaction space SR in the range of from 1 x 105to 3.5 x 106Pa.

10. The process of any one of claims 1 to 9, wherein the alcohol conversion conditions according to (ill) comprise a temperature of the reaction mixture MG in the range of from 100 to 200 °C.

11. The process of any one of claims 1 to 10, wherein the liquid mixture ME prepared according to (II) further comprises a solvent component S, wherein the solvent component S comprises, preferably consists of, a solvent does not form an azeotrope with water.

12. The process of any one of claims 1 to 11 , wherein the reduced form of the precursor comprises a compound of formula (P-l) or (P-ll):wherein R1, R2, R3and R4either are hydrogen, or form together with the N-containing ring a tetrahydroquinoline unit, a decahydroquinoline unit, a tetrahydroacridine unit, or a tetradecahydroacridine unit; and wherein L1and L2are, independently of each other, as defined above;wherein R1, R2, R3and R4are hydrogen; and wherein L1and L2are, independently of each other, as defined above.

13. The process of any one of claims 1 to 12, wherein R is selected from the group consisting of H, methyl, ethyl, propyl, isopropyl, butyl, isobutyl, and tert-butyl, and wherein integer x is 1 or 2.

14. The process of any one of claims 1 to 13, wherein the liquid mixture ME prepared according to (ii) further comprises a compound of formula (wherein R1, R2, R3and R4’ L1, L2, and n are identical to R1, R2, R3and R4’ L1, L2, and n of the catalyst of formula (A).

15. A process, preferably according to any one of claims 1 to 14, comprising the step of converting a chemical material obtainable by or obtained by the process according to any one of claims 1 to 14 to obtain a product Q.

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