32 results about "Nonene" patented technology

The invention relates to the technical field of neodecanoic acid preparation, and provides a high-purity neodecanoic acid preparation method which comprises the following steps: S1, adding a catalyst into a high-pressure kettle, introducing CO, injecting nonene, and reacting to obtain a reaction solution; s2, mixing the reaction liquid with an extraction agent, feeding the mixture into an extractive distillation tower, and performing extraction and separation to obtain a first organic phase; s3, adding water into the first organic phase, washing and separating to obtain a second organic phase; s4, adding an alkaline additive into the second organic phase, layering to obtain an upper-layer organic phase, and carrying out reduced pressure distillation on the upper-layer organic phase to obtain neodecanoic acid; in the step S1, the raw materials of the catalyst comprise supported cobalt oxide and concentrated sulfuric acid; the supported cobaltous oxide is prepared from the following raw materials: water-soluble cobalt salt and boron nitride; in the step S2, the extraction agent comprises 1, 2-propylene glycol. According to the technical scheme, the problem of low purity of neodecanoic acid in related technologies is solved.

This invention provides a tert-nonylthiol and its synthesis method. The synthesis steps are as follows: nonene and hydrogen sulfide are preheated separately, then the preheated nonene and hydrogen sulfide are mixed, and the mixture is reacted under the action of a catalyst to obtain tert-nonylthiol. The preheating temperature of nonene is 40-50℃, and the preheating temperature of hydrogen sulfide is 50-60℃. This invention provides mild reaction conditions and precise preheating of nonene and hydrogen chloride separately. The product prepared by this method has a purity of over 99.0%, meeting the requirements of high-end industrial applications for high-purity tert-nonylthiol.

The invention discloses a novel preparation method of cis-6-nonenal, and relates to the technical field of preparation of flavors and fragrances. According to the method, leaf alcohol is used as a raw material, self-made 1-bromo-3-hexene is used as halogenated hydrocarbon to synthesize a Grignard reagent, then the Grignard reagent and 2-(2-bromoethyl)-1, 3-dioxolane are subjected to a Grignard coupling reaction, an intermediate cis-6-nonenal diethyl acetal is generated, and then the product cis-6-nonenal is obtained through hydrolysis. The method has the advantages of high synthesis yield, no isomer in the product, high purity, simple reaction conditions, simple process route and potential industrial application prospect.

The invention relates to a preparation method of 3-butyl nonanol, which comprises the following steps: carrying out redox reaction on 2-butyl-1-octanol, NaDCC, a catalyst, a pH (Potential of Hydrogen) regulator and dichloromethane to prepare 2-butyl-1-octanal; the preparation method comprises the following steps: under the condition of protective gas, carrying out Wittig reaction on 2-butyl-1-octanal, PPh3CH3Br and K2CO3, so as to prepare 3-butyl-1-nonene; and carrying out a hydroboration-oxidation reaction on the 3-butyl-1-nonene, BH3. THF, H2O2 and NaOH, so as to prepare the 3-butyl nonanol. The preparation method is simple, convenient and mild in reaction condition.

The application discloses a preparation method and application of royal jelly acid, and belongs to the technical field of chemical synthesis, and solves the problem that the preparation of royal jelly acid in the prior art cannot have simple steps and mild conditions. The method comprises the following steps: 9-bromo-1 nonene and acrylic acid are subjected to esterification reaction under the action of an organic solvent and an alkali, so that acrylic acid-8-nonene-1-yl ester is obtained, and the structural formula is shown as formula I; under the action of a catalyst, the acrylic acid-8-nonene-1-yl ester is subjected to olefin metathesis reaction, so that a compound with a structural formula shown as formula II is obtained; after hydrolysis reaction under alkaline conditions, acidification is performed, so that royal jelly acid is obtained. The method provided by the application has the advantages of wide raw material sources, relatively low price, improved synthesis efficiency and product yield, reduced equipment cost and production risk, and is beneficial to the implementation of industrialized production.

The invention discloses a preparation method of alpha-hexylcinnamyl aldehyde, which is characterized in that under the protection of nitrogen, an inorganic alkali aqueous solution is used as a catalyst, a composition of a non-polar solvent and an ether solvent is used as a solvent, and benzaldehyde and octanal react to prepare the alpha-hexylcinnamyl aldehyde. By adopting the method disclosed by the invention, the content of hexyl nonenal which is a condensation product of octanal can be effectively reduced, the selectivity of alpha-hexylcinnamyl aldehyde (relative to octanal) is improved, the product quality is ensured, and the jasmine flower fragrance is characterized; in addition, the wastewater amount can be effectively reduced, the technological process is simplified, and the product competitiveness is improved.

The invention belongs to the technical field of nanocellulose, and discloses a preparation method of ionic liquid dissolved nanocellulose. The method comprises the following steps: 1) mixing a cellulose raw material with ionic liquid, heating, stirring and dissolving to obtain a cellulose solution; the ionic liquid is one or more of a 1-propyl-3-methylimidazole chloride (brominated) compound, a 1-butyl-3-methylimidazole chloride (brominated) compound, a 1-ethyl-3-methylimidazole chloride (brominated) compound, a 1, 5-diazabicyclo [4.3. 0]-5-nonene-alkane chloride, and a 1, 8-diazabicyclo [4.3. 0]-5-nonene-alkane chloride; and 2) adding the cellulose solution into an ethanol-water anti-solvent for nanocrystallization treatment, washing with water, separating out nanocellulose, and recovering the ionic liquid. The method disclosed by the invention is simple, green and efficient, the yield of the nanocellulose is high, the energy consumption is low, the ionic liquid can be recycled and is easy to recover, and the method has a good application prospect.

This invention discloses a cyclononenyl bicovalent macroporous covalent organic framework and its preparation method. The framework contains both C-C and B-O covalent bonds, exhibiting a ring-shaped macroporous structure. The preparation method involves mixing 10,15-dihydro-5H-tribenzo[a,d,g][9]cyclononen-2,3,7,8,12,13-hexanol with a diboronic acid monomer at a molar ratio of 3:2, dissolving the mixture in a mixed solvent of mesitylene and dioxane, reacting at 90°C under nitrogen protection, and obtaining the target product after filtration, washing, and drying. The diboronic acid monomer is 1,4-phenylenediboric acid or 4,4''-biphenylenediboric acid. This material has the characteristics of good thermal stability, ideal specific surface area and pore size greater than 2nm. It exhibits excellent adsorption capacity and selectivity for CO2, low-carbon alkanes, acetylene and other substances. It can be used in the separation of low-carbon alkanes, adsorption of dye macromolecules, photoelectrocatalytic carriers and other fields. Moreover, no external transition metal catalyst is required in the synthesis process, which makes it low-cost and environmentally friendly.

The present invention addresses the problem of providing: a novel compound capable of eliminating or deodorizing α,β-unsaturated aldehydes such as 2-nonenal; and a deodorant or the like which contains the compound.　Provided is a compound represented by formula (I) or a salt thereof. (In formula (I), R1 is NHNH2, NH2, OH, or OR7; R2 is a hydrogen atom or a C1-C4 alkyl group; R3 is a hydrogen atom, NR8R9, or a C1-C4 alkyl group; R4 is a hydrogen atom or a C1-C4 alkyl group; R5 is a hydrogen atom or a C1-C4 alkyl group; R6 is NH2, (CH2)mNH2, OH, or SH; R7 is a C1-C4 alkyl group; R8 is a hydrogen atom or a C1-C4 alkyl group; R9 is a hydrogen atom or a C1-C4 alkyl group; m is an integer of 1-4; and n is an integer of 0-3.)

To provide a perfume composition for deodorization capable of deodorizing all of feces and urine odor, food odor and body odor without generating chemical odor.SOLUTION: The perfume composition for deodorization contains the following components (A) and (B), wherein the mass ratio [(B) / (A)] of the component (B) to the component (A) is 0.12 or more. (A) an aromatic ring-free unsaturated aldehyde having a molecular weight of 100 to 160 and 9 to 10 carbon atoms, and (B) one or more selected from the group consisting of 2-methyl-2-pentenoic acid, cis-3-hexenyl benzoate, citronellyl butyrate, benzaldehyde, trans-3-hexenol, cis-6-none-1-ol, and thymol SELECTED DRAWING: None

The present application discloses a composition comprising A and B, wherein the A is selected from one or more of the following: a compound represented by formula (I) and its salt and / or hexamethylenetetramine, 1,5-diazabicyclo[4.3.0]-non-5-ene, 1,8-diazabicyclo[5.4.0]undec-7-ene; the B is selected from a compound represented by formula II, and a method for preparing a compound of formula VI by using the above composition, wherein the definitions of the substituents in formula III, formula V and formula VI are the same as those in the description. The A and the B in the composition of the present application have a synergistic effect.

The invention discloses a process for continuously preparing neodecanoic acid through a propylene trimerization-branched nonene hydroformylation-oxidation method, and belongs to the technical field of neodecanoic acid preparation. The process comprises the following steps: (1) continuously introducing propylene into a propylene polymerization reactor filled with a solid phosphoric acid catalyst, and carrying out polymerization reaction, so that propylene is tripolymerized into a mixed product containing branched nonene; (2) continuously introducing the mixed product containing branched nonene and synthesis gas of CO and H2 into a hydroformylation reactor filled with an Rh-Xantphos / SBA-15 catalyst, and carrying out a hydroformylation reaction to obtain a mixed product containing neocapraldehyde; (3) continuously introducing the mixed product containing neodecanal and air into an oxidation reactor filled with a TS-1 molecular sieve, and carrying out oxidation reaction to obtain a mixed product containing neodecanoic acid; and (4) rectifying and purifying the mixed product containing neodecanoic acid to obtain a high-purity neodecanoic acid product. The continuous production of neodecanoic acid can be realized by combining the process provided by the invention with a fixed bed reactor.

The invention discloses a heat-triggered in-situ reinforced polyolefin high polymer material and a preparation method thereof, and belongs to the technical field of high polymer materials. The preparation method comprises the following steps: carrying out a ring-opening metathesis polymerization reaction on 9-tosyl-9-azabicyclo [6.1. 0] nonyl-4-ene and cyclooctene under the catalysis of a ruthenium-based catalyst to obtain a ring-opening metathesis polymerization reaction product, mixing the ring-opening metathesis polymerization reaction product with elemental sulfur, and carrying out a cross-linking reaction under the catalysis of an organic alkali to obtain the thermal-trigger in-situ reinforced polyolefin polymer material. The heat-triggered in-situ reinforced polyolefin high polymer material provided by the invention has the characteristics of glass-like high polymers in an initial state, and can realize preliminary recycling of waste materials or precise molding of special-shaped parts; the thermosetting resin also has mechanical properties close to those of traditional thermosetting resin, and can be competent for high-load and high-temperature extreme service environments; the reinforcing process is spontaneously or inductively generated after the part is formed, and additional reinforcing fibers or fillers do not need to be added.

The invention relates to the technical field of compound preparation, and discloses a preparation method of cis-6-nonenal and cis-6-nonenol, and the preparation method of cis-6-nonenal comprises the following steps: mixing 1-halohexyl-3-ene with a catalyst, then adding a Grignard reagent to carry out a coupling reaction, and then carrying out a deprotection reaction to obtain cis-6-nonenal; the preparation method of the cis-6-nonenol comprises the following steps: mixing cis-6-nonenal with a reducing agent, and carrying out a reduction reaction to obtain the cis-6-nonenol. According to the present invention, the low-cost Grignard reagent and the 1-halohexyl-3-ene are adopted as the reactants, the coupling reaction is performed under the catalyst condition, the deprotection reaction is performed to obtain the cis-6-nonenal, the cis-6-nonenal is adopted as the raw material to prepare the cis-6-nonenol, the reaction condition is mild, the yield is high, and the method is suitable for industrial production. The purity of the prepared cis-6-nonenal and cis-6-nonenol is high, and the purity can reach 99% or above.

The application relates to the technical field of adsorbents, and particularly discloses an adsorbent for efficiently separating 1-nonene and 2-methyl-1-octene and a preparation method thereof. The method specifically comprises the following steps: S1: preparing an aqueous solution of 0.5-3 mass parts of a transition metal salt, and impregnating 10 mass parts of a porous carrier; the transition metal salt is at least one selected from FeCl3, CuCl2 and CoCl2; the porous carrier is at least one selected from gamma-Al2O3, ZIF-8 and ZIF-20; and S2: performing solvent removal treatment on the impregnated porous carrier under an inert gas atmosphere to obtain the adsorbent. The adsorbent is mainly composed of the porous carrier and an active metal component. Compared with the porous carrier without the loaded transition metal salt, the adsorbent can improve the purity of 1-nonene. The method has a simple process flow, low raw material price and large-scale preparation potential.

The invention provides an amino acid-based adhesive as well as a preparation method and application thereof, and the preparation method comprises the following steps: A) mixing small organic molecule super alkali with aldehyde, heating and stirring to obtain a eutectic solvent; the organic micromolecule super alkali comprises 1, 8-diazabicyclo [5.4. 0] undec-7-alkene and / or 1, 5-diazabicyclo [4.3. 0] nonyl-5-alkene, and the organic micromolecule super alkali comprises 1, 8-diazabicyclo [5.4. 0] undec-7-alkene and / or 1, 5 The aldehyde comprises one or more of vanillin, cinnamyl aldehyde and furfural; and B) mixing the eutectic solvent with amino acid, and heating for reaction to obtain the amino acid-based adhesive. Compared with traditional urea-formaldehyde resin, the amino acid-based adhesive prepared by the method is higher in bonding strength, a reliable way is provided for preparing green and safe plywood, a one-pot method is used for preparation, and the preparation process is simpler.

The invention provides a method for preparing an efficient perfluorononenyl ether, and relates to the technical field of organic synthesis. The method comprises the following steps: in the presence of a phase transfer catalyst, using a KOH aqueous solution as a base, adding a hydroxyl compound, slowly adding a hexafluoropropylene trimer to react, and separating and purifying to obtain the perfluorononenyl ether. In the presence of a phase transfer catalyst, a green reaction system using water as a reaction medium and an inorganic base as an acid absorber overcomes the drawback of low reaction efficiency in a heterogeneous reaction process, and the obtained perfluorononenyl ether has a high yield and a high raw material conversion rate.

[Problem] To provide a new fish-attracting composition and fish feed containing the same. [Solution] A fish-attracting composition containing one or more compounds selected from group A.　(Group A) 4-heptenal, 2-nonenal, 2,6-nonadienal, 2,4-decadienal, benzyl alcohol, 1-octanol, 2-ethylhexanol, amyl alcohol, 1-octen-3-ol, ethyl maltol, 2-heptanone, 2-nonanone, 1-octen-3-one, isophorone, homofuraneol, 1,5-octadiene-3-one, cyclotene, γ-butyrolactone, 2-acetyl-3-methylpyrazine, 2,6-dimethoxyphenol, 4-ethylguaiacol, paracresol, 3-ethylphenol, guaiacol, 4-allyl-2,6-dimethoxyphenol, 3-mercapto-2-pentanone

The invention provides a composition for removing aging odor, application of the composition and a washing product, the composition for removing aging odor comprises a first component and a second component, and the mass ratio of the first component to the second component is 3: 1-12: 1; the first component is one or more of compounds containing primary amino, and the second component comprises one or more of sulfite, pyrosulfite and hydrosulfite. A primary amine group in the first component compound can be subjected to a Schiff base reaction with an aldehyde group, so that the main source substance 2-nonenal of the aged odor can be effectively eliminated; the sulfite, the pyrosulfite and / or the hydrosulfite in the second component can be subjected to redox reaction with the aldehyde group, so that the 2-nonenal can be effectively removed; the first component and the second component are used together, so that synergistic interaction can be realized, and an excellent 2-nonenal removal effect is achieved.

The invention discloses a catalyst for preparing neodecanoic acid by a mixed nonene hydroformylation-oxidation method as well as a preparation method and application of the catalyst, and belongs to the technical field of neodecanoic acid preparation. The catalyst provided by the invention is a Co-Mn / CeO2-SiO2 catalyst, and comprises a CeO2-SiO2 composite carrier, and active components Co and Mn which are loaded on the CeO2-SiO2 composite carrier, the molar ratio of CeO2 to SiO2 in the CeO2-SiO2 composite carrier is (1-3): 1, the loading capacity of the active component Co is 0.1-0.5% of the mass of the CeO2-SiO2 composite carrier, and the loading capacity of the active component Mn is 1.0-2.0% of the mass of the CeO2-SiO2 composite carrier. The Co-Mn / CeO2-SiO2 catalyst provided by the invention has high catalytic property on hydroformylation reaction and oxidation reaction in the process of preparing neodecanoic acid from mixed nonene, the preparation of neodecanoic acid by a mixed nonene hydroformylation-oxidation method is realized, and the conversion rate of mixed nonene is high, and the selectivity of neodecanoic acid is high, so that the yield of neodecanoic acid is improved.

The invention belongs to the technical field of fine chemical engineering, and particularly relates to a synthesis method of cis-6-nonene-1-ol. The preparation method comprises the following steps: enabling 1, 6-hexanediol to react with tert-butyldimethylsilyl chloride, so as to obtain 6-((tert-butyldimethylsilyl) oxy) hex-1-alcohol; and adding an oxidizing agent into the 6-((tert-butyldimethylsilyl) oxy) hexane-1-alcohol to obtain the 6-((tert-butyldimethylsilyl) oxy) hexanal. And adding triphenyl (propylidene)-phosphorus into the 6-((tert-butyldimethylsilyl) oxy) hexanal to obtain the (Z)-tert-butyldimethyl (6-alkene-1-oxy) silane. The preparation method comprises the following steps: adding triphenyl (propylidene)-phosphorus into the 6-((tert-butyldimethylsilyl) oxy) hexanal; tetrabutylammonium fluoride is added into the (Z)-tert-butyl dimethyl (6-ene-1-oxy) silane, and the cis-6-nonene-1-ol is obtained. The synthetic route is mild in reaction condition, low in cost and suitable for industrial production, and the total yield can reach 29%. And secondly, the synthetic route does not generate harmful substances or dangerous compounds, and is environment-friendly.

The invention relates to a method for preparing coal-based mPAO and the prepared mPAO.The method comprises the steps that 1, coal-based Fischer-Tropsch synthesis light oil containing C5-C9 fractions is subjected to first fraction cutting and first deoxidation treatment, and 1-nonene is obtained; the coal-based Fischer-Tropsch synthesis heavy oil containing the C10-C18 fractions is subjected to second fraction cutting and second deoxidation treatment, and 1-tridecene is obtained; and (2) in an inert atmosphere, in the presence of a metallocene catalyst and an auxiliary agent, contacting the 1-nonene with the 1-tridecene, and carrying out a polymerization reaction. The method disclosed by the invention is mild in condition, the application field of the olefin raw material of the coal-based Fischer-Tropsch synthetic oil can be widened, the use efficiency of odd-carbon alpha-olefin is improved, and the prepared mPAO is high in viscosity, high in VI value and low in pour point.

The invention relates to a method for rapidly and controllably preparing a three-dimensional porous carbon material derived from waste macromolecules at room temperature. The method comprises the following steps: crushing the waste macromolecules; the preparation method comprises the following steps: preparing a 1, 5-diazabicyclo [4.3. 0] nonene / urea eutectic solvent; the method comprises the following steps: mixing crushed waste macromolecules with a 1, 5-diazabicyclo [4.3. 0] nonene / urea eutectic solvent, and adding soluble carbonate as a template agent to form a homogeneous mixture; placing the mixture in a supercritical carbon dioxide reaction kettle for pretreatment to obtain a pretreated mixture, and then drying the pretreated mixture; grinding the pretreated mixture and a melamine phosphate activating agent, and fully and uniformly mixing; and performing one-step carbonization on the dried mixture in an inert atmosphere to obtain a carbonized product. The method has the advantages of low cost, low temperature, rapidness, controllability, great reduction of energy consumption, process simplification and the like, and is suitable for industrial popularization and application.

The invention discloses a bio-based polymer capable of being recycled in a closed-loop mode and a preparation method and application of the bio-based polymer. The preparation method comprises the following steps that firstly, isosorbide and acrylic acid are subjected to an esterification reaction to generate a mono-esterification intermediate; respectively carrying out esterification reaction on the single esterification intermediate and bio-based olefine acid 11-dodecenoic acid, cis-tridecane-12-olefine acid, 10-undecylenic acid, 9-decenoic acid, 8-nonenoic acid or 7-octenoic acid containing long-chain alkyl fragments to generate a double esterification intermediate; and carrying out ring-opening metathesis polymerization (ROMP) on the two monomers by using a Grubbs II catalyst to obtain the bio-based polyolefin capable of being recycled in a closed-loop manner. By adjusting the proportion of the raw materials and controlling the reaction time, the relative molecular mass and the mechanical property of the polymer can be regulated and controlled. The polymer can be depolymerized by Grubbs II to obtain a reactant monomer, so that efficient recovery is realized. The bio-based polyolefin material provided by the invention has potential application value in environment-friendly packaging, 3D printing, electronic equipment shells and the like.

The invention belongs to the field of fine chemical engineering, and particularly discloses a method for preparing tert-dodecyl mercaptan by using a high-boiling residue byproduct of a nonene device, which comprises the following steps: purifying and refining the high-boiling residue byproduct of the nonene device as a raw material through vacuum rectification, collecting fractions at 70-90 DEG C under the conditions that the vacuum degree is 95-98kPa and the reflux ratio is 3-5 as a dodecene raw material for synthesizing the tert-dodecyl mercaptan, in an absorption tower type reactor, under the catalytic action of a tubular acidic resin catalyst, tert-dodecanethiol is subjected to reverse contact and chemical absorption with hydrogen sulfide, tert-dodecanethiol is continuously synthesized, the highest conversion per pass can reach 87%, and the selectivity is close to 100%. Due to the adoption of the packed tower type structure, the difficulty in designing, manufacturing and operating the reactor is greatly reduced, and the temperature rise can be controlled through the circulation of materials after the reaction. The method not only solves the problem of raw material source of tert-dodecanethiol, but also makes full use of the high-boiling residue byproduct of the nonene device, and greatly improves the economic benefit and market core competitiveness of the nonene device.

The invention discloses a cyclooctyne-derived phosphoramidite monomeric compound as shown in a formula I and a preparation method and application thereof, and belongs to the field of chemical modification of oligonucleotide and development of functional nucleic acid, the preparation method comprises the following steps: cyclopropanation is carried out on cyclooctyl-1, 5-diene and ethyl diazoacetate to obtain bicyclo [6.1. 0] non-4-ene-9-carboxylic acid ethyl ester, and the bicyclo [6.1. 0] non-4-ene-9-carboxylic acid ethyl ester is subjected to cyclopropanation to obtain the cyclooctyne-derived phosphoramidite monomeric compound as shown in the formula II; the preparation method comprises the following steps: carrying out an addition reaction with bromine and a subsequent elimination reaction to obtain bicyclo [6.1. 0] nonyl-4-alkyne-9-carboxylic acid ethyl ester, carrying out ester hydrolysis to obtain bicyclo [6.1. 0] nonyl-4-alkyne-9-carboxylic acid, carrying out a condensation reaction on the bicyclo [6.1. 0] nonyl-4-alkyne-9-carboxylic acid and 6-amino-1-hexanol to obtain N-(6-hydroxyhexyl) bicyclo [6.1. 0] nonyl-4-alkyne-9-carboxamide, and carrying out a condensation reaction on the N-(6-hydroxyhexyl) bicyclo [6.1. 0] nonyl-4-alkyne-9-carboxamide and 2-cyanoethyl-N, N-dimethylformamide to obtain the target product. And reacting with N, N-diisopropyl phosphoramidite chloride to obtain a target product. The compound is applied to oligonucleotide alkynyl modification, and a new thought and a valuable intermediate are provided for functionalization of DNA / RNA.

The present application relates to the field of catalysts, in particular to a kind of high-efficiency propylene trimerization multi-active center catalyst and its preparation method.The propylene trimerization multi-active center catalyst is composed of porous carrier and Lewis acid, wherein the Lewis acid is any two or more combinations in AlCl3, CuCl2, ZnCl2.The present application combines different kinds of Lewis acid with porous carrier together, and the multi-active center catalyst suitable for propylene trimerization is prepared by impregnation method.The results show that compared with single Lewis acid catalyst, the propylene conversion rate and the selectivity of trimerization product 1-nonene of the obtained catalyst are improved.The method has simple process flow, low raw material price and has the potential for large-scale preparation.

The invention discloses a preparation method and application of royal jelly acid, belongs to the technical field of chemical synthesis, and solves the problem that preparation of royal jelly acid in the prior art cannot simultaneously have simple steps and mild conditions. The method comprises the following steps: carrying out esterification reaction on 9-bromine-1-nonene and acrylic acid under the action of an organic solvent and alkali to obtain acrylic acid-8-nonene-1-yl ester of which the structural formula is shown as a formula I; under the action of a catalyst, acrylic acid-8-nonene-1-yl ester is subjected to an olefin metathesis reaction to obtain a compound with a structural formula as shown in a formula II; and carrying out hydrolysis reaction under an alkaline condition, and acidifying to obtain the royal jelly acid. According to the method provided by the invention, the raw materials are wide in source and relatively low in price, the synthesis efficiency and the product yield are improved, the equipment cost and the production risk are reduced, and implementation of industrial production is facilitated.

The present invention relates to a composition comprising saturated nonanoic acid or a salt of saturated nonanoic acid, at least one monounsaturated nonanoic acid and at least one emulsifier, a process for the preparation of said composition and the use of said composition in weed control applications.

The invention provides a method for preparing nonene through propylene trimerization and a process system thereof, and relates to the technical field of fine chemical engineering, and the method comprises the following steps: carrying out reaction and gas-liquid separation on propylene under the catalysis of a heterogeneous catalyst to obtain a mixed product of dimerization, trimerization and tetramerization; the heterogeneous catalyst comprises at least one of a Zr-loaded catalyst, a Ni-loaded catalyst, a W-Zr composite oxide catalyst and a Si-Zr composite oxide catalyst; and carrying out two-stage falling film evaporation on the obtained mixed product to separate out tripolypropylene, so as to obtain nonene. The method is simple in technological process and mild in reaction condition, the catalyst is stable in form and easy to recycle, the propylene conversion rate and the C9 product selectivity can be remarkably improved, and industrial large-scale production of nonene is facilitated.