90results about "Preparation by dehydrogenation" patented technology

The invention belongs to the technical field of chemical production, and particularly relates to an efficient energy-saving refining system for producing cyclohexanone through dehydrogenation, which comprises an alcohol tower, a dehydrogenation heat exchanger, a dehydrogenation reactor, an alcohol tower feeding heat exchanger, a dehydrating tower, a light tower I, a light tower II, a ketone tower and an alcohol recovery tower which are connected in sequence, a middle feeding port of the alcohol tower is communicated with a tube pass discharging port of the alcohol tower feeding heat exchanger, a top discharging port of the alcohol tower is communicated with a tube pass feeding port of the dehydrogenation heat exchanger, a bottom discharging port of the alcohol tower is communicated with a middle feeding port of the alcohol recovery tower, and an alcohol ketone drying tower is additionally arranged between the alcohol tower feeding heat exchanger and the dehydration tower. A feed port of the alcohol ketone drying tower is communicated with a shell pass discharge port of the alcohol tower feed heat exchanger, and a liquid phase discharge port of the alcohol ketone drying tower is communicated with an upper feed port of the dehydrating tower. The alcohol tower adopts a process that raw materials directly enter the tower top, tower top reflux is cancelled, steam consumption is reduced, and the purpose of saving energy is achieved.

The present invention discloses a catalyst for dehydrogenating cyclohexanol to cyclohexanone, a preparation method thereof and an application thereof. The catalyst comprises a silica support and active components and active promoters uniformly loaded on the silica support; the active components include copper element, zinc element and magnesium element; the active promoter is selected from borate. The catalyst for dehydrogenating cyclohexanol to cyclohexanone disclosed by the present invention greatly enhances the interaction between the silica support and the active components, and significantly improves the long-term stability of the catalyst on the basis of ensuring that the catalyst has excellent catalytic activity and selectivity.

The invention relates to the technical field of chemical catalysis, in particular to a copper-silicon catalyzed cyclohexanol gradient dehydrogenation and hydrogen recycling method which comprises the following steps: step 1, preparing a gradient catalyst, namely carrying out surface hydroxyl regulation pretreatment on porous silica gel, and loading a copper salt solution by adopting a step-by-step impregnation method to form gradient distribution with gradually decreased copper loading capacity from outside to inside, carrying out segmented heating reduction in a reducing atmosphere containing 5vol% of H2 / N2; 2, gradient dehydrogenation reaction process control; and 3, hydrogen in-situ separation and cyclic utilization: separating hydrogen from the reaction outlet gas through a palladium alloy membrane, controlling the pressure difference of the two sides of the membrane to maintain the permeation flux, returning the separated hydrogen to the inlet of the reactor to adjust the hydrogen partial pressure, and storing the residual hydrogen. Through gradient catalyst preparation, accurate reaction process control and efficient hydrogen recovery technologies, the cyclohexanone production efficiency is improved, and long-term stability of the catalyst and efficient recycling of hydrogen are achieved.

The invention discloses application of a supported heterogeneous catalyst of oxide and copper-manganese spinel in preparation of acetaldehyde by anaerobic dehydrogenation of ethanol, and belongs to the technical field of heterogeneous catalysis for preparation of acetaldehyde and hydrogen by anaerobic dehydrogenation of ethanol. The reaction is carried out in a fixed bed reactor, under the conditions that the reaction atmosphere is nitrogen, the reaction temperature is 280 DEG C and the mass space velocity is 66.1 h <-1 >, the ethanol conversion rate is 72.5%, the acetaldehyde selectivity is 95.0%, and the space time yield of acetaldehyde based on the copper-manganese composite oxide is 43.5 h <-1 >, so that high-selectivity preparation of acetaldehyde and hydrogen under relatively mild conditions is realized; the system has the remarkable advantages of simple catalyst preparation, high catalytic activity under the condition of high mass airspeed, high space-time yield of acetaldehyde, high atom utilization rate of the system, good stability and the like. The CuMnTi-1 catalyst can be stabilized for more than 70 hours, the CuMnTi-1 improves the utilization rate of copper and manganese, improves the catalytic performance, reduces the demand quantity of copper-manganese spinel in the reaction, and reduces the overall cost of catalyst preparation.

The invention discloses a catalyst for preparing cyclohexanone by cyclohexanol dehydrogenation coupled phenol hydrogenation, the catalyst has a composite metal hydrotalcite structure, the metal components comprise ruthenium, magnesium and aluminum, the metal components are uniformly dispersed in hydrotalcite, and the ruthenium, the magnesium and the aluminum respectively account for 1-5wt%, 10-30wt% and 1-10wt% of the total mass of the catalyst. The acid-base property, the specific surface area and the pore structure of the catalyst are optimized by adjusting the ratio of magnesium to aluminum, so that the dispersion of ruthenium is improved, the interaction between ruthenium and a hydrotalcite carrier is increased, and the synergistic effect of all the element components enables active centers in cyclohexanol dehydrogenation, hydrogen transfer and phenol hydrogenation processes to be efficiently combined together, so that the catalytic activity of the catalyst is improved. Rich alkaline sites are generated in the catalyst, the dehydration side reaction of cyclohexanol can be effectively inhibited, meanwhile, the selectivity of cyclohexanone prepared through phenol hydrogenation is improved, it is ensured that the phenol hydrogenation reaction and the cyclohexanol dehydrogenation reaction can be effectively coupled, and cyclohexanone is efficiently prepared.

The invention discloses a copper-based catalyst for preparing acetaldehyde through ethanol dehydrogenation as well as a preparation method and application of the copper-based catalyst. The preparation method comprises the following steps: S1, carrying out alkalization treatment on protic mordenite in a strong alkali solution to increase the number of surface hydroxyl groups of the protic mordenite; and S2, adding the mordenite obtained in the step S1 into a copper salt solution to load copper ions, and then sequentially carrying out low-temperature drying shaping and medium-temperature activation stages to obtain the copper-based catalyst with networked Cu-OH-Si-O bonds on the surface. Through the synergistic effect of alkali liquor regulation and control and staged oxygen roasting, the dispersity and stability of a Cu active center in the catalyst are improved, the acetaldehyde selectivity of the reaction of preparing acetaldehyde through ethanol dehydrogenation is also improved, and side reactions are inhibited. Carrying out heat treatment regeneration on the inactivated copper-based catalyst in an oxygen-containing atmosphere; and after regeneration, the networked Cu-OH-Si-O bond on the surface of the copper-based catalyst is reconstructed.

The invention relates to the technical field of energy environment science and engineering, in particular to a plasma-ferroelectric WO3-x / K4Nb6O17 heterojunction and a preparation method and application thereof. According to the plasma-ferroelectric WO3-x / K4Nb6O17 heterojunction, a ferroelectric K4Nb6O17 nanosheet serves as a substrate, oxalic acid dihydrate and sodium borohydride serve as composite reducing agents, in-situ synthesis of WO3-x nanoparticles with oxygen vacancies and in-situ loading and growth of the WO3-x nanoparticles on the surface of the K4Nb6O17 nanosheet are achieved in the solvent heat treatment process, and the plasma-ferroelectric WO3-x / K4Nb6O17 heterojunction is obtained. Therefore, the plasma-ferroelectric WO3-x / K4Nb6O17 heterojunction is obtained. The WO3-x / K4Nb6O17 heterojunction can be used as a photocatalyst, and the coupling reaction efficiency of preparing CO through photocatalytic CO2 reduction and preparing hydrogenated benzoin through benzyl alcohol oxidation is improved.

The invention relates to a catalyst for preparing cyclododecanone through cyclododecanol dehydrogenation and a preparation method and application thereof. The catalyst component comprises copper, zinc, zirconium, sodium, calcium, aluminum and iron; the catalyst is prepared from the following components in percentage by mass in an oxide form: 40 to 65 weight percent of copper oxide, 10 to 21 weight percent of zinc oxide, 10 to 30 weight percent of zirconium oxide, 5 to 20 weight percent of sodium oxide, 1 to 5 weight percent of calcium oxide, 0.5 to 1.5 weight percent of aluminum oxide and 0.05 to 0.5 weight percent of iron oxide. In one embodiment, according to the preparation method of the catalyst provided by the invention, water vapor is added during roasting in a nitrogen environment, so that the release speed of carbon dioxide is controlled, and formation of carbon deposition in the roasting process is reduced. The catalyst can solve the problem of low selectivity caused by low dehydrogenation reaction conversion rate and many by-product cyclododecene, and has the characteristics of high strength, good hydrothermal resistance, long service life and the like.

Disclosed herein is a method for converting ethanol to 1,3-butadiene, wherein the method utilizes H2 produced during a first step of the method for subsequent conversions involved in the method. In particular aspects, H2 produced from converting ethanol to acetaldehyde is used to promote the conversion of the acetaldehyde to 1,3-butadiene. The H2 promotes enhanced catalyst stability, as well as enhanced selectivity and yields of the 1,3-butadiene product. In particular aspects, the method comprises two steps to produce the 1,3-butadiene from the ethanol and H2 produced from a first step facilitates enhanced selectivities and yields for the second step.

This invention discloses the application of an oxide-coated copper-manganese spinel supported heterogeneous catalyst in the oxygen-free dehydrogenation of ethanol to acetaldehyde, belonging to the field of heterogeneous catalysis technology for the oxygen-free dehydrogenation of ethanol to acetaldehyde and hydrogen production. The reaction is carried out in a fixed-bed reactor under a nitrogen atmosphere at a temperature of 280°C and a mass hourly space velocity (WHSV) of 66.1 h⁻¹. ‑1 Under the given conditions, the ethanol conversion rate was 72.5%, the acetaldehyde selectivity was 95.0%, and the space-time yield of acetaldehyde based on copper-manganese composite oxides was 43.5 h⁻¹. ‑1 This invention achieves highly selective preparation of acetaldehyde and hydrogen under relatively mild conditions. The system possesses significant advantages, including simple catalyst preparation, high catalytic activity under high mass space velocity (MHSV) conditions, high MHSV yield of acetaldehyde, high atom utilization, and good stability. The CuMnTi-1 catalyst of this invention remains stable for over 70 hours. CuMnTi-1 improves the utilization rate of copper and manganese, enhances catalytic performance, reduces the amount of copper-manganese spinel required in the reaction, and lowers the overall cost of catalyst preparation.

The application discloses an oxide-sulfide S-type heterojunction composite photocatalyst as well as a preparation method and application thereof. x The oxide-sulfide S-type heterojunction composite photocatalyst is prepared by adding WO x into ethanol, uniformly ultrasonic dispersing, and then performing heating and dry distillation. The application successfully constructs a tungsten oxide and cadmium sulfide heterojunction, has good light response, utilizes a heterojunction interface formed by the two catalysts and having a synergistic effect, improves the photocatalytic hydrogen production capacity, and promotes selective oxidation of benzyl alcohol. The application has simple operation and good repeatability.

The invention belongs to the field of photocatalysis, and particularly discloses a perovskite composite photocatalyst for photocatalytic ethanol dehydrogenation and application. The composite photocatalyst takes a CdS nanorod as a carrier, a Cs2AgBiBr6 double perovskite active component formed by CsBr, AgBr and BiBr3 precursors is loaded on the surface of the CdS nanorod through a vacuum in-situ growth method, and a Pt, Rh or Ni metal cocatalyst can be further loaded. The method comprises the following steps: dispersing a CdS nanorod and a perovskite precursor in a mixed organic solvent, carrying out vacuum freezing-air exhaust circulation treatment, and removing the solvent under a heating condition to prepare the composite photocatalyst. When the photocatalyst is used for an ethanol photocatalytic dehydrogenation reaction under an anaerobic condition, hydrogen, acetaldehyde and acetal can be efficiently generated under the irradiation of visible light. According to the method, the photo-generated charge separation efficiency and the reaction stability are remarkably improved, and a new way is provided for ethanol high-valued conversion.

The present application provides a kind of hydroxyl dehydrogenation preparation aldehyde or ketone dehydrogenation catalyst and its preparation method.The present application reduces the acidity of catalyst by introducing Li adjuvant, reduces the generation of by-product heavy oil.By reacting Li with silicon source to generate lithium silicate, Li is fixed, and by adding condensed aluminum phosphate to fix lithium silicate, the loss of lithium silicate is inhibited.By using water vapor hydrothermal treatment of catalyst at different temperatures, the pore of catalyst can be effectively enlarged, the mass transfer effect in the reaction process is improved, and the catalyst can have better dehydrogenation activity at low temperature.The catalyst prepared by the method described in the present application can achieve high activity at a lower temperature, the production of by-products is inhibited by adding alkaline adjuvant, and the alkaline adjuvant is effectively immobilized by adding solidifying agent, to improve the operating stability of the catalyst.

The present invention concerns a process for utilizing waste streams from an oxo synthesis plant by gasification and an oxo process plant comprising the necessary units for oxo synthesis and at least one gasifier G. The process comprises a conversion of a waste stream W1 purged from the alcohol upgrading unit ALUU and optionally also of a waste stream W2 purged from a hydroformylation reaction unit HRU. The conversion by a gasification process in at least one gasifier G results in synthesis gas which can then be utilized e.g., for as a feedstock for an oxo process or production of other chemicals in another chemical production plant.

To provide a fluorine-containing ether compound that can form a surface layer that excels in durability and a method of manufacturing the same, a fluorine-containing ether composition and a coating liquid, and an article having a surface layer that excels in durability and a method of manufacturing the same.SOLUTION: A fluorine-containing ether compound is expressed by the following formula (A1) or (A2). Formula (A1): {RfO-(Rf1O)m1-(R1)m2-(CHF)m3-O-(CHF)m4}n1-Q1(-T1)n2. Formula (A2): (T2)n3-Q2-(CHF)m5-O-(CHF)m6-(R2)m7-O-(Rf2O)m8-(R3)m9-(CHF)m10-O-(CHF)m11-Q3(-T3)n4, provided that the symbols in the formulas are as described in the specification.SELECTED DRAWING: Figure 1

This invention provides a supported Cu catalyst, its preparation method, and a method for preparing methyl ethyl ketone (MEK). The catalyst has the structural formula Cu-ZnAl-LDO, and the molar ratio of Cu, Zn, and Al in the catalyst is (1-4):(1-3):(1-3). The active centers of the catalyst are Cu nanoparticles rich in surface defects, with a particle size of 3-6 nm. Based on the total mass of the catalyst, the Cu loading of the active centers is 24-30 wt% (based on metal element content). The surface defects are composed of Cu nanoparticles, and the surface defect content is 52-70% based on the surface area of ​​the Cu nanoparticles. This invention achieves a uniform and stable distribution of the active center Cu nanoparticles on the support surface by employing specific material ratios and preparation methods. By controlling the crystal structure and surface electron distribution, it prevents the aggregation and deactivation of nanoparticles during high-temperature and long-term reactions, significantly improving the catalyst's stability and extending its service life.

The invention provides a method for treating a phenol hydrogenation byproduct. The method comprises the following steps: obtaining a byproduct heavy component generated in a phenol hydrogenation process; carrying out catalytic hydrogenation reaction on the byproduct heavy component to generate an intermediate product; carrying out fracture reaction on the intermediate product to generate a first target product; carrying out dehydrogenation reaction on the first target product to generate a second target product; and separating and purifying the second target product to obtain a final product.

A method for the industrial production of teprenone and its application. The present invention belongs to the field of teprenone synthesis. The purpose of the present invention is to solve the technical problems of the existing teprenone synthesis method, which has a long route, many side reactions, and requires the use of special reagents. The method of the present invention comprises the following steps: first, farnesene is reacted with acetoacetate in the presence of a catalyst to obtain farnesene ketone ester, which is then decarboxylated to produce farnesene acetone, and then subjected to a reduction reaction, a halogenation reaction, and a Wittig reaction to obtain teprenone. The method avoids the shortcomings of existing processes, has fewer conversion steps in the synthesis route, and produces teprenone with high yield and purity, making it suitable for industrial production. The teprenone of the present invention is used as a drug for treating gastric diseases.

The present invention relates to a method for the dehydrogenation of a feedstock containing ethanol, using at least one multi-tubular reactor, which advantageously comprises a plurality of tubes containing at least one dehydrogenation catalyst and a calender, wherein the feedstock is introduced into the tubes in gaseous form, the inlet temperature being greater than or equal to 240°C, the pressure being between 0.1 and 1.0 MPa, and the WWH being between 2 and 15 h. -1 wherein the heat transfer fluid flows through the calender at a flow rate such that the weight ratio of the heat transfer fluid relative to the feedstock is 1.0 or greater, and the heat transfer fluid is introduced into the calender in gas form at an inlet temperature of 260°C or greater and an inlet pressure of 0.10 MPa or greater and 1.10 MPa or less, and exits the calender at least partially in liquid form.

The present invention relates to a bifunctional catalyst comprising a carrier and an active component; the carrier is amorphous silica gel, and the active component is an all-silicon molecular sieve encapsulating a metal element; the metal element provides dehydrogenation active centers for the bifunctional catalyst, and the carrier and the all-silicon molecular sieve provide Lewis acid centers for the bifunctional catalyst. The present invention provides a bifunctional catalyst containing an all-silicon molecular sieve encapsulating copper and a preparation method thereof. The method comprises the following steps: mixing a silicon source I, a copper source, an additive, a dispersant, a nitrogen-containing heterocyclic compound, an alkali source, and H2O in a proportional manner, followed by hydrothermal treatment to obtain an all-silicon molecular sieve encapsulating copper oxide; and mixing a silicon source II, the prepared all-silicon molecular sieve encapsulating copper oxide, sesbania powder, a porogen, and H2O in a proportional manner, followed by molding to obtain the bifunctional catalyst containing the all-silicon molecular sieve encapsulating copper oxide. The present invention also provides a method for directly preparing ketones from olefins, using the above-mentioned bifunctional catalyst.

The invention belongs to the technical field of fatty acid methyl ester conversion, and discloses a method for preparing long-chain alpha-olefin and co-producing fatty aldehyde and formic acid from fatty acid methyl ester. The method comprises the following steps: carrying out hydrogenation reaction on fatty acid methyl ester to generate fatty alcohol and methanol; carrying out dehydration / dehydrogenation reaction on the fatty alcohol to obtain long-chain alpha-olefin, fatty aldehyde, water and hydrogen; carrying out dehydrogenation reaction on the methanol to generate methyl formate and hydrogen; carrying out hydrolysis reaction on the methyl formate to obtain formic acid and methanol; wherein the catalyst used in the dehydration / dehydrogenation reaction of the fatty alcohol comprises a dehydrogenation active site, a dehydration active site, a dispersing aid and a carrier; the dispersity of the dehydrogenation active site is greater than 31.0%; the concentration of the dehydration active site is 4.5 to 9.0 [mu] mol / g. Three high-added-value products of long-chain alpha-olefin, fatty aldehyde and formic acid can be simultaneously produced by using the single raw material fatty acid methyl ester, the comprehensive utilization rate of byproducts in the process is high, zero discharge of wastewater in the process is realized, and balanced utilization of the raw material and the products is achieved.

A method for producing a nano-Pd catalyst supported on a nitrogen-doped hierarchical porous carbon, characterized in that it comprises: 1) Preparation of a nitrogen-doped hierarchical porous carbon, 2) Mixing the nitrogen-doped hierarchical porous carbon produced in step 1) with water and adjusting the pH of the mixed solution to alkaline. 3) Mixing the mixture solution prepared in step 2) with the aqueous solution of Pd metal precursors, adding reducing agent and obtaining the nano-Pd catalyst supported on the nitrogen-doped hierarchical porous carbon after reduction.

The invention belongs to the technical field of organic synthesis, and particularly discloses a synthesis method of isopinopinone, which comprises the following steps: (1) by taking alpha-pinene as a raw material, hydroborating by using a borane tetrahydrofuran complex, and oxidizing the hydroboration product by using a sodium hydroxide solution and hydrogen peroxide to obtain isopinopinol; (2) performing high-temperature dehydrogenation on the isopinopinol by taking Cu / Ni-Al-SBA-15 as a catalyst to obtain a product, namely isopinopinone; the total loading capacity of Cu and Ni in the Cu / Ni-Al-SBA-15 is 9-12%, the molar ratio of Cu to Ni is (8-10): 1, and the molar ratio of Si to Al in the carrier Al-SBA-15 is (9-11): 1. The conversion rate and the yield of the two-step reaction are relatively high, the dehydrogenation catalyst in the second step can be recycled for more than three times through filtration, and compared with a traditional copper-silicon catalyst, the mesoporous weak-acid molecular sieve serving as a carrier can effectively improve the product selectivity. The purity of the isopinopinone obtained through filtration and rectification can reach 99% or above, the cost can be effectively reduced, and industrial production can be achieved.

The invention belongs to the technical field of catalysts. The invention provides a catalyst for preparing cyclopentanone through cyclopentanol dehydrogenation and a preparation method thereof.The preparation method comprises the steps that S1, 120-126 g of potassium pyrophosphate, 10-13 g of stannous chloride, 8-10 g of copper sulfate and 2-3 g of carbon nano tube powder are added into 1 L of deionized water, the pH value is adjusted to 7-8, and an electroplating solution is obtained; s2, assembling a PS colloidal crystal template on the pretreated copper sheet to obtain a copper sheet with the PS colloidal crystal template; s3, taking a copper sheet with the PS colloidal crystal template as a cathode and a titanium mesh as an anode, performing electro-deposition in the electroplating solution, roasting at 500-550 DEG C for 3-4 hours, stripping and grinding to obtain a Sn-Cu-CNT composite material; s4, etching the Sn-Cu-CNT composite material with 10vol% acetic acid for 30-35 minutes in an ice bath at 0-5 DEG C to obtain an etched material, putting the etched material into an ammonia water-EDTA (Ethylene Diamine Tetraacetic Acid) mixed solution with the pH (Potential of Hydrogen) of 9.5, and oscillating for 10 minutes at 60 DEG C to obtain a carrier; and S5, impregnating the carrier with a nickel nitrate solution, drying, and roasting to obtain the catalyst. The method can effectively improve the conversion rate of cyclopentanol and the selectivity of cyclopentanone.

The invention relates to a copper monatomic loaded titanium dioxide / elemental titanium heterojunction as well as a preparation method and application of the copper monatomic loaded titanium dioxide / elemental titanium heterojunction. The heterojunction comprises elemental titanium, titanium dioxide and copper single atoms, the elemental titanium and the titanium dioxide form a heterojunction, and the copper single atoms are loaded on the titanium dioxide component in the heterojunction; in the preparation method, metal elementary substance titanium is directly used as a raw material, direct oxidation of part of titanium species is achieved by accurately controlling the calcination temperature and calcination time, and then the dispersion state of loaded copper species is ensured by controlling the mass ratio of a soluble copper source to titanium dioxide / elementary substance titanium heterojunction; and finally obtaining the copper monatomic loaded titanium dioxide / elemental titanium heterojunction photocatalyst. The copper monatomic loaded titanium dioxide / elemental titanium heterojunction prepared by the preparation method disclosed by the invention has relatively excellent photocatalytic methanol reforming reaction performance.

Disclosed herein are processes for preparing certain intermediates useful in the synthesis of 3-fluoro-5-(((1S,2aR)-1,3,3,4,4-pentafluoro-2a-hydroxy-2,2a,3,4-tetrahydro-1H-cyclopenta[cd]inden-7-yl)oxy)benzonitrile or a pharmaceutically acceptable salt thereof.

The application discloses a preparation method of a copper-based catalyst, the copper-based catalyst and application thereof, and belongs to the technical field of bioenergy and chemical industry. The method comprises the following steps: obtaining a precursor I; the precursor I comprises a carrier and a supported active component, the active component contains copper elements, and the carrier is a molecular sieve with a silicon-aluminum ratio greater than 200; the precursor I is subjected to silicon component coating treatment to obtain a precursor II; the precursor II is calcined and reduced to obtain the copper-based catalyst; the silicon component coating treatment comprises the following steps: obtaining a gel containing a silicon source I, a template agent I, a solvent I and the precursor I; and the gel is heated in water vapor to obtain the precursor II. The method has the advantages of simple operation, low catalyst cost, economy and practicability, high acetaldehyde production efficiency and low energy consumption.

The invention discloses a preparation method of a catalyst for preparing acetaldehyde from ethanol, and belongs to the technical field of chemical synthesis, and the method comprises the following steps: dissolving a metal salt in deionized water, adding a silicon source and a template agent, adjusting the pH value, atomizing the solution, and carrying out aerosol spray drying to form a catalyst precursor; immersing the precursor into a dopamine-Tris buffer solution, and performing in-situ polymerization to form a polydopamine shell layer; and performing high-temperature carbonization and hydrogen reduction to obtain the catalyst. The method comprises the following steps: adding a catalyst into a reaction tube, fixing in a fixed bed reactor, preheating ethanol, introducing into the fixed bed reactor, reacting on the surface of the catalyst to generate acetaldehyde and hydrogen, condensing and separating acetaldehyde, and collecting hydrogen through a gas device arranged at the outlet of the reactor. According to the invention, the problems of low acetaldehyde selectivity, easy sintering deactivation of the catalyst and the like in the prior art are solved, the acetaldehyde selectivity is effectively improved, and the service life of the catalyst is prolonged.

1. A process comprising: (a) providing a used tire feedstock; (b) gasifying the used tire feedstock to produce a gas stream comprising carbon monoxide, hydrogen, and carbon dioxide; (c) biosynthetically converting at least a portion of the carbon monoxide, hydrogen, and carbon dioxide in the gas stream to produce a first product stream; (d) converting at least a portion of the first product stream to a second product stream comprising acetaldehyde and hydrogen; (e) passing a portion of the hydrogen in the second product stream to the aforementioned step of biosynthetically converting at least a portion of the carbon monoxide, hydrogen, and carbon dioxide in the gas stream; and (f) converting at least a portion of the acetaldehyde to butadiene monomer.

A method for producing methanol having a deuterium content of less than 90 ppm based on the total hydrogen content, (a) supplying hydrogen having a deuterium content of less than 90 ppm based on the total hydrogen content by water electrolysis using electricity generated at least partially from non-fossil renewable resources; and (b) supplying carbon dioxide; and (c) reacting hydrogen and carbon dioxide in the presence of a catalyst to form methanol comprising a method.