403 results about "Hexanoic acid" patented technology

The invention discloses a pure bio-based polyhydroxyalkanoate adhesive as well as preparation and application thereof, and belongs to the technical field of degradable adhesives. According to the adhesive, polyhydroxybutyrate valerate or polyhydroxybutyrate hexanoate is used as a matrix, and the acid value reaches 2-15 mg KOH / g through molten end group activation; a reactive emulsifier with a hydrophilic-lipophilic balance value of 9-12 is introduced into a water phase, and the stable aqueous dispersion is prepared through phase inversion high-shear emulsification. The Z-average particle size of the dispersion is 0.12-0.30 [mu] m, and the content of the free surfactant is not higher than 30wt%. After the tackifying resin, the plasticizer and the vegetable wax are compounded, the bio-based carbon content of the obtained adhesive is not lower than 95%, and the volatile organic compound content is not higher than 100 mg / kg. The paper / paper heat sealing strength of the adhesive is not lower than 7.0 N / 15mm, the 180-degree peel strength is not lower than 7.5 N / 25mm, and the adhesive can pass repulping evaluation.

The invention discloses a biosynthesis system for high-yield 1, 6-hexamethylenediamine and application of the biosynthesis system, and belongs to the technical field of biology. According to the method, key genes which are excavated and optimized in a 1, 6-hexamethylenediamine biosynthetic pathway are co-expressed in a single cell module or a multi-cell module, and different enzyme elements expressed by the cell module are subjected to enzyme cascade reaction, so that 1, 6-hexamethylenediamine can be efficiently synthesized by taking caprolactam or 6-aminocaproic acid as a substrate; furthermore, after the carboxylic acid reductase MaCAR is mutated, the catalytic activity of the carboxylic acid reductase MaCAR can be remarkably improved, and the yield of the 1, 6-hexamethylenediamine is further improved; in addition, the biosynthesis system disclosed by the invention directly takes the cell module as a whole-cell catalyst, and an enzyme purification step is avoided, so that the biosynthesis system has the advantage of low cost.

The invention discloses high-thermal-conductivity carbon black and a preparation method and application thereof, and relates to the technical field of carbon black modification.The preparation method of the high-thermal-conductivity carbon black comprises the following steps that carbon black is subjected to oxidation treatment, silanization treatment and tannic acid coating treatment, and modified carbon black is obtained; preparing a graphene / boron nitride / modified carbon black multi-dimensional filler; carrying out primary modification on the graphene / boron nitride / modified carbon black multi-dimensional filler by adopting lignin, polyvinylpyrrolidone and samarium chloride, and then carrying out secondary modification by adopting 6-aminocaproic acid to obtain the high-thermal-conductivity carbon black. The high-thermal-conductivity carbon black prepared by the invention not only has good dispersity, but also can well improve the thermal conductivity and mechanical properties of a rubber matrix.

The application belongs to the technical field of daily chemical industry, and particularly relates to an emulsion and a preparation method thereof. The emulsion provided in the application comprises an emulsifier, glycerol, oil-phase active substance, pentaerythritol tetra(ethylhexanoate) and water; the emulsifier is a lipopeptide; the weight percentage of the lipopeptide and the glycerol is not less than 3%; the weight ratio of the oil-phase active substance and the pentaerythritol tetra(ethylhexanoate) is 1:3-10; the ratio of the sum of the weights of the lipopeptide and the glycerol to the sum of the weights of the oil-phase active substance and the pentaerythritol tetra(ethylhexanoate) is 1:3-10; and the ratio of the sum of the weights of the lipopeptide, the glycerol, the oil-phase active substance and the pentaerythritol tetra(ethylhexanoate) to the weight of the water is 1:1-4. The emulsion is prepared by using sodium bacillomycin, glycerol and pentaerythritol tetra(ethylhexanoate), can effectively inhibit the diffusion of the oil-phase active substance at the interface of the emulsion, reduce the oxidative degradation of the oil-phase active substance, and greatly prolong the effective action time of the oil-phase active substance in the emulsion.

The imine reductase mutant provided by the invention can catalyze asymmetric reductive amination of ethyl 3-formylhexanoate and (S)-2-aminobutanamide to synthesize brivaracetam, two chiral centers of brivaracetam are constructed in one step, and the problems of poor environmental protection property, low atom utilization rate, long route and the like in the existing industrial synthesis route are solved. Wide application prospects are realized.

The invention discloses an antistatic PET dust-free film and a preparation method thereof, and relates to the technical field of high polymer materials. When the antistatic PET dust-free film is prepared, firstly, 6-bromohexanoic acid reacts with 4-imidazole-1-butyric acid, and then is subjected to ion exchange with potassium hexafluorophosphate to prepare diacid imidazole hexafluorophosphate ionic liquid; the preparation method comprises the following steps: enabling montmorillonite to react with tetraethoxysilane, 3-aminopropyltriethoxysilane and dodecyl triethoxysilane, so as to obtain modified montmorillonite; carrying out copolycondensation on terephthalic acid, the diacid imidazole hexafluorophosphate ionic liquid, ethylene glycol and the modified montmorillonite to prepare a modified polyester master batch; and carrying out melt blending on the modified polyester master batch and a chain extender, and carrying out blow molding to obtain the antistatic PET dust-free film. The prepared antistatic PET dust-free film has the advantages of being antistatic, flame-retardant, super-hydrophobic and low in dust adhesion rate.

An object of the present invention is to provide a coated paper that includes a coating layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) with few coating defects. As a solution, the present invention provides a coated paper including a coating layer containing poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) and an adhesive, on at least one side of a paper substrate. A solid content weight ratio of the poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) to the adhesive in the coating layer is 99.9 / 0.1 to 60.0 / 40.0.

The present disclosure relates to a method that includes hydrolyzing a polyamide by contacting the polyamide with a hydrolase. In some embodiments of the present disclosure, the polyamide may include nylon-6, nylon 6,6, or a combination thereof. In some embodiments of the present disclosure, the hydrolyzing may produce aminohexanoic acid, an oligomer of aminohexanoic acid, ε-caprolactam, or combinations thereof.

The invention relates to the technical field of microorganisms, in particular to saccharomyces cerevisiae CEC NRI16 and application thereof. The invention provides Saccharomyces cerevisiae CEC NRI16, which is used for wine brewing, can significantly improve the variety aroma and the content of ester substances and terpene substances in dry white wine, especially can promote the generation of ethyl acetate, isoamyl acetate, ethyl hexanoate, ethyl caprate and linalool, reduces the generation of isoamyl alcohol, and improves the yield of wine. The grape wine presents richer fragrance of green fruits such as pears and apples and fragrance of flower fragrance such as violet and roses, and the raw and green taste is effectively reduced. The yeast strain is strong in fermentation capacity and excellent in fermentation performance, and has great value in the aspects of maintaining the typicality of grape wine varieties and enhancing flavor characteristics.

The invention discloses a preparation method of ulinastatin adsorption resin, and belongs to the technical field of adsorption resin. Comprising the following steps: (1) preparing a water phase: adding pure water, gelatin, cellulose, sodium chloride and lignin into a reaction kettle until the materials are fully dissolved; (2) preparing an oil phase, wherein the oil phase contains divinylbenzene, methyl acrylate, benzoyl peroxide, tert-butyl peroxy-2-ethylhexanoate, triallyl isocyanurate, tripropanol alkyl trimethacrylate and methylbenzene, and the oil phase is uniformly stirred and mixed with the methylbenzene and the trivinylbenzene, the methyl acrylate, the benzoyl peroxide, the tert-butyl peroxy-2-ethylhexanoate, the triallyl isocyanurate, the tripropanol alkyl trimethacrylate and the methylbenzene; (3) suspension polymerization: putting the oil phase into the water phase, and carrying out staged heating reaction; (4) amination reaction; (5) alkylation reaction; and (6) acid-base alcohol treatment. Compared with the existing resin, the resin disclosed by the invention has the characteristics of high adsorption exchange rate, high desorption rate and high desorption concentration on ulinastatin, and the yield of ulinastatin is increased by 1.17 times compared with that of D215 resin.

The invention belongs to the technical field of organic synthesis, and particularly relates to an asymmetric phenanthroline compound as well as a preparation method and application thereof. Compared with the original symmetric ligand compound, the asymmetric phenanthroline compound provided by the invention has the advantage that the extraction performance and selectivity of americium are improved. In addition, the asymmetric phenanthroline compound provided by the invention is stable in structure, has good acid resistance and radiation resistance, can be suitable for high-acidity post-treatment waste liquid, improves the fat solubility of the phenanthroline ligand, is easy to split phases, does not need to use 2-bromohexanoic acid and other synergistic extractants, and reduces the introduction of secondary wastes in the post-treatment process.

The invention belongs to the technical field of microbial fermentation, and particularly relates to a new enterobacter rorrhizae strain as well as a separation and screening method and application thereof. In order to enrich microbial resources for producing pyrazine substances through metabolism in the white spirit industry, an enterobacter rorrhizae strain is separated and screened from a mixture of yeast for making hard liquor and fermented grains, and the preservation number is CGMCC No.33262. The strain has good tolerance to pH, salt and alcohol, and can adapt to the growth environment in the white spirit production process; and various pyrazine substances represented by tetramethylpyrazine can be produced. Besides, the strain has strong adaptability to fermented grains, the yield of tetramethylpyrazine is high in a culture medium taking bran, wheat and five grains as the fermented grains, and meanwhile, various flavor substances such as ethyl acetate, ethyl hexanoate, ethyl caprylate, 2, 3-butanediol, guaiacol and 4-vinyl guaiacol can be produced. Therefore, the enterobacter rorrhizae disclosed by the invention can be widely used for brewing white spirit.

The invention relates to the technical field of microorganisms, and particularly discloses a recombinant microorganism and application thereof in production of hexamethylenediamine. Compared with an original strain, the recombinant microorganism disclosed by the invention expresses a carboxylic acid reductase CAR variant, a CAR activating enzyme sfp and putrescine transaminase patA; the amino acid sequence of the carboxylic acid reductase CAR variant is as shown in SEQ ID NO. 28; preferably, adipic acid transporters DcaK and DcaP, acyl CoA transferases DcaI and DcaJ, an acylated succinate semialdehyde dehydrogenase sucD, and a 4-aminobutyric acid transaminase gabT are also expressed. By utilizing the recombinant microorganism, 6-aminocaproic acid / adipic acid can be efficiently converted into hexamethylenediamine, and a new method is provided for green biosynthesis of hexamethylenediamine.

The invention relates to ester-producing aroma-producing yeast for making hard liquor as well as a preparation method and application thereof, and belongs to the technical field of liquor making. According to the invention, two microorganisms with high ester yield, namely saccharomyces cerevisiae and pichia pastoris, are screened, and the saccharomyces cerevisiae and the pichia pastoris which are compounded in different proportions are subjected to compound fermentation, so that the yields of ethyl acetate produced by the saccharomyces cerevisiae and the pichia pastoris which are compounded in different proportions are different. The yeast for making hard liquor is subjected to enhanced fermentation according to the optimal inoculation proportion, the content of ethyl acetate, ethyl hexanoate and ethyl lactate of the prepared yeast for making hard liquor is greatly increased, and the saccharifying power, the liquefying power, the fermenting power and the esterifying power of the yeast for making hard liquor are also remarkably improved. In addition, the invention also finds that the pichia pastoris and the saccharomyces cerevisiae of the strengthened yeast are always maintained at a relatively high level in the fermentation process, so that the quality of the yeast can be remarkably improved by compounding the pichia pastoris and the saccharomyces cerevisiae, and the strong aroma is given to the liquor in the fermentation of the Luzhou-flavor liquor.

A composition comprising: i) from 2% to 5% by weight of an aqueous solution comprising a hydrophilic active ingredient; ii) from 1% to 2% by weight of methyl glucose sesquistearate; iii) from 10% to 12% by weight of a polyglycerol-3 ester of a fatty acid; iv) at least 83% by weight of an ester oil selected from the group consisting of cetyl ethylhexanoate, isopropyl isostearate, and ethylhexyl palmitate; and wherein all weight percentages are based on the total weight of the composition; and wherein the sum of i), ii), iii) and iv) does not exceed 100% by weight. A method for dispersing a hydrophilic active ingredient in an oil. A cosmetic or dermatological pharmaceutical formulation comprising the initial composition. The invention also relates to a cosmetic or dermatological pharmaceutical formulation. A method of cosmetic, non-therapeutic treatment and / or care of skin, hair, nails and / or mucous membranes of a subject comprising topical application of a cosmetically effective amount of the composition.

The invention belongs to the technical field of cosmetics, and particularly relates to a slow-release permeation-enhancing composition based on a water-in-oil system as well as a preparation method and application of the slow-release permeation-enhancing composition. The slow-release permeation-enhancing type composition is prepared from the following components in parts by weight: 1 to 6 parts of polydimethylsiloxane PEG-10 / 15 cross-linked polymer, 0.1 to 2 parts of PEG-10 polydimethylsiloxane, 2 to 15 parts of polydimethylsiloxane, 2 to 15 parts of glycerol tri (ethylhexoic acid) ester and 0.01 to 2 parts of squalane. The sustained-release permeation-promoting composition has excellent wrapping capacity on active ingredients, oxidation and decomposition of the active ingredients are reduced, and therefore the activity retention rate of the active ingredients is remarkably increased. Moreover, the composition formed by the specific compound components has unique molecular structure and physical properties, and a wrapping system of the composition can effectively control the release rate of the active components, so that the durability and effectiveness of the application effect of the composition are improved, and the permeation promoting effect of the composition is further enhanced.

The invention belongs to the technical field of genetic engineering, and particularly relates to a saccharomyces cerevisiae esterifying enzyme mutant for catalyzing production of ethyl hexanoate as well as a preparation method and application of the saccharomyces cerevisiae esterifying enzyme mutant. In order to improve the yield of ethyl hexanoate produced by the existing esterifying enzyme, the 28th site, the 69th site, the 125th site, the 180th site and the 214th site of the amino acid sequence of the esterifying enzyme derived from saccharomyces cerevisiae are subjected to substitution and / or deletion and / or insertion of at least one amino acid through a genetic engineering technology to obtain various esterifying enzyme mutants, so that the molecular modification is realized, and the yield of ethyl hexanoate produced by the esterifying enzyme is improved. Therefore, the reaction activity of catalyzing the esterification enzyme to produce ethyl hexanoate is improved. According to the method, the biosynthesis efficiency of ethyl hexanoate is improved through enzyme molecule modification, new power is injected for transformation and upgrading of the modern brewing industry, and the traditional brewing industry is promoted to develop towards the intelligent and precise direction.

The invention relates to a saccharomycetes strain with high yield of esterifying enzyme and application thereof, the classification name of the saccharomycetes strain is Wickerhamomyces anomalus, the saccharomycetes strain is preserved in China General Microbiological Culture Collection Center on March 21, 2025, the preservation number is CGMCC 33925, and the address of the preservation unit is No.3, Yard 1, Beichen West Road, Chaoyang District, Beijing. The strain screened by the invention has the ability of high yield of esterifying enzyme, and can synchronously catalyze synthesis of a plurality of key esters such as ethyl acetate, ethyl hexanoate, ethyl lactate and the like. Through the synergistic effect of polyesters, the flavor level of the liquor body is richer, and the liquor body is close to the composite aroma characteristic of the traditional solid fen-flavor liquor. The strain is naturally adapted to brewing of fen-flavor liquor and intensified application of medium and low temperature yeast, exogenous enzyme dependence is reduced, and the esterification capacity of yeast is improved.

An antifungal composition including a first essential oil, and a second essential oil, where the composition is configured to reduce disease onset, pathogen spread, or a combination thereof. Further, an antifungal compound including one or more aroma compounds selected from 4-(4-hydroxyphenyl)-2-butanone, furaneol, ethyl methylphenylglycidate, ethyl hexanoate, ethyl butanoate, beta-ionone, alpha-ionone, (R)-(+)-limonene, (S)-(-)-limonene, cis-3-Hexen-1-ol, nerol, linalool, 2-heptanone, alpha-terpineol, beta-damascenone, β-caryophyllene, ethyl 2-methylbutanoate, β-myrcene, gamma-octalactone, alpha-humulene, nerolidol, (E,E)-2,4-decadienal, (E,E)-α-farnesene, vanillin, phenylethyl acetate, citral, 3-methylbutan-1-ol, or a combination thereof.

The invention relates to the technical field of surface treatment, in particular to a bio-based degradable cable material and a preparation method thereof. The bio-based degradable cable material is prepared from 55 to 65 parts of matrix resin mixed by poly L-lactic acid and poly-3-hydroxybutyrate-3-hydroxyhexanoate, 4 to 6 parts of dianhydride modified castor oil polyol, 10 to 15 parts of polypentamethylene diamine adipate, 5 to 8 parts of nano reinforcing filler, 6 to 10 parts of bio-based plasticizer, 0.5 to 1.0 part of antioxidant and 8 to 12 parts of environment-friendly flame retardant. A dynamic ester bond cross-linked network formed by the reaction of a dynamic ester bond cross-linking agent dianhydride modified castor oil polyol only undergoes ester bond breakage at a high temperature exceeding a normal working range to release stress, and the temperature returns to normal and can be recombined; the semi-interpenetrating network reinforced phase poly (pentamethylene diamine adipate) and the matrix resin form an interpenetrating structure in a molecular chain interpenetrating manner, a stable heat-resistant skeleton is constructed, high-temperature deformation is effectively inhibited, the overall degradability of the material is ensured by the bio-based structure, and the balance of heat resistance and degradability is realized.

The application provides a Torulopsis glbrata TS-73 and application thereof in fermented fruit juice, and belongs to the technical field of microbial fermentation.The application adopts a composite mutagenesis method combining ARTP mutagenesis and ultraviolet mutagenesis to obtain a Torulopsis glbrata TS-73 capable of high yield of ethyl hexanoate;when the application is used for preparing fermented cherry juice and raspberry juice, the content of ethyl hexanoate in the cherry juice and the raspberry juice is increased by 44.01% and 54.19% respectively compared with the original strain Torulopsis glbrata G4.The Torulopsis glbrata TS-73 has the advantages of increasing the content of aroma substance ethyl hexanoate and stable performance.

The invention relates to the technical field of electrocatalytic oxygen reduction, in particular to a three-dimensional covalent organic framework material and a preparation method and application thereof. The preparation method of the novel material comprises the step of enabling a monomer 4, 4 ', 4', 4 '''-(1, 4 (1, 4)-dibenzocyclohexanoic acid-12, 13, 42, 43-tetrayl) tetrabenzaldehyde with a three-dimensional structure to react with 5, 10, 15, 20-tetraaminophenyl cobalt porphyrin, 1, 2-dichlorobenzene, 1-butanol and acetic acid according to a certain proportion to obtain the novel material. The novel material provided by the invention is simple in preparation process and good in stability, has very excellent catalytic capability on the oxygen reduction reaction of the cathode of the fuel cell, is stable in performance, and is a new energy material with great development potential and wide market prospect.

The invention discloses a method for rapidly enriching pit mud high-yield caproic acid functional flora and application, and belongs to the technical field of baijiu brewing microorganisms. According to the method, the aged pit mud which is screened through tests and has better quality is used as seed mud, and the selected high-quality pit mud is subjected to step-by-step amplification culture by adopting a specific culture medium. The obtained bacterial community is a caproic acid producing bacterial community (85%) with the caproic acid producing clostridium as the main body, and the bacterial community can produce more than 10 g / L of caproic acid and less than 2 g / L of butyric acid. The mixed flora obtained by the method disclosed by the invention can be used for culturing and repairing the pit mud, increasing the caproic acid-producing main flora in the pit mud, promoting the pit mud to be aged, preventing the pit mud from being aged and hardened, and effectively improving the quality of raw wine at the same time. And the mixed flora can also be used for fermenting the byproduct yellow water of the Luzhou-flavor liquor to produce caproic acid at high yield, and can be further used for producing high-quality flavoring liquor.

The invention discloses composite ester-based hydraulic oil and a preparation method thereof, and belongs to the technical field of hydraulic oil preparation. The hydraulic oil based on the complex ester comprises the following components: pentaerythritol synthetic ester, polysebacic acid glycol ester, a viscosity-temperature performance regulator, an ash-free antioxidant, a bio-based anti-wear agent and a nano modifier. Wherein the pentaerythritol synthetic ester is a mixed ester obtained by carrying out a reaction on a mixture of 2-ethylhexanoic acid, 3, 5-dimethylhexanoic acid and 4-methyloctanoic acid and pentaerythritol, and the pentaerythritol synthetic ester is a mixture of 2-ethylhexanoic acid, 3, 5-dimethylhexanoic acid and 4-methyloctanoic acid; the viscosity-temperature performance regulator is a grafted copolymer obtained by grafting poly (N-isopropylacrylamide) to a poly (ethylene sebacate) molecular chain through an ester exchange reaction. The product prepared by the method disclosed by the invention can effectively solve the contradiction between the environmental protection performance and the comprehensive performance of the traditional hydraulic oil through the synergistic effect of the components, has the characteristics of high biodegradation rate and good oxidation resistance and hydrolytic stability, and can keep excellent performance in both low-temperature and high-temperature environments.

The invention discloses lactobacillus casei capable of improving the flavor of a tea beverage through fermentation and application of the lactobacillus casei. The lactobacillus casei is preserved in the China General Microbiological Culture Collection Center (CGMCC), the preservation number of the lactobacillus casei is CGMCC No.32672, and the preservation date of the lactobacillus casei is November 18, 2024. The lactobacillus casei can be used for producing extracellular beta-glucosidase, polyphenol oxidase and peroxidase; when being used for fermentation, the fermentation broth can improve the flavor and color of a tea beverage, increase the content of organic acid, reduce the bitter taste of the tea beverage, generate new volatile aroma substances such as nerolidol, isobutanol, ethyl hexanoate, ethyl 3-hexenoate, ethyl caprylate, ethyl 2-hexenoate and the like, and enrich the aroma substance composition of the tea beverage. The invention provides a novel tea beverage production process which has the advantages of simplicity and convenience in operation, low cost, remarkable effect and the like, and is suitable for industrial production.

The invention relates to the technical field of comprehensive treatment of agricultural pests, and particularly provides a bactrocera cucurbitae double-trapping type attractant based on optimal matching of host and intestinal bacteria volatile matters and application of the bactrocera cucurbitae double-trapping type attractant. The attractant comprises an active component and a synergistic component, the active component is derived from balsam pear and towel gourd volatile matters and bactrocera cucurbitae intestinal bacterial metabolites, and comprises 2-methyl ethyl valerate, propyl hexanoate, ethyl hexadienoate, heptanal, benzyl alcohol, 3-methyl acetic acid-1-butanol, indole and 1-undecanol; and the synergistic component is myzobenzoic ketone. Active components are quickly released in the early stage of application, so that the attraction efficiency is remarkably improved; the synergistic component prolongs the trapping lasting period through the slow release effect, and the long-term trapping effect is ensured. All the components of the attractant provided by the invention are biological sources or environment-friendly chemical substances, the attractant meets the requirement of green prevention and control, can efficiently attract male and female adults at the same time, makes up the limitation that a traditional sex attractant only induces male adults or a food attractant only induces female adults, and is beneficial to more comprehensive control of population quantity.

The application relates to the technical field of chemical synthesis, in particular to a synthesis method of a key intermediate of pentconazole, which comprises the following steps: S1, Witting-Horner reaction of 2,4-dichlorobenzophenone and (diethoxy) phosphoethyl acetate under the action of a strong base to generate 3-(2,4-dichlorophenyl)-2-en-hexanoic acid ethyl ester; S2, Prilezhaev epoxidation reaction of 3-(2,4-dichlorophenyl)-2-en-hexanoic acid ethyl ester and meta-chloro peroxybenzoic acid to generate 3-(2,4-dichlorophenyl)-2,3-epoxy-hexanoic acid ethyl ester; and S3, base hydrolysis and acidification of 3-(2,4-dichlorophenyl)-2,3-epoxy-hexanoic acid ethyl ester to obtain a key intermediate 2-(2,4-dichlorophenyl) pentanal of pentconazole. The application has the effects of higher reaction yield, lower toxicity of reaction raw materials and more gentle reaction conditions.

This invention discloses a method for preparing high-quality bio-based 1,9-nonanediol, comprising the following steps: transesterification, precipitation, fatty acid methyl ester refining, ozone oxidation pyrolysis, solvent recovery, esterification, dimethyl azelaate refining, and hydrogenation to obtain high-quality bio-based 1,9-nonanediol. This invention achieves gradient and full-component utilization of vegetable oil raw materials: the oil-based portion of triglycerides is used to produce high-quality bio-based 1,9-nonanediol, while simultaneously producing byproducts such as methyl palmitate, methyl stearate, propionic acid, hexanoic acid, and nonanoic acid; the glycerol-based portion of triglycerides is used as a byproduct of glycerol production. This invention utilizes esterification to reconstruct the products of ozone oxidation pyrolysis, converting the high-boiling-point monomethyl azelaate into the low-boiling-point dimethyl azelaate, achieving efficient separation from saturated fatty acid methyl esters. The dimethyl azelaate, as a raw material, is then hydrogenated to obtain high-quality nonanediol, significantly reducing production costs.

The invention discloses a production method of high-grade flavoring liquor of Luzhou-flavor liquor, and relates to the field of liquor brewing. Aiming at the problems of insufficient substrate conversion, easy unbalance of flavor and easy rancidification of fermentation in the traditional double-round fermentation process, the technical scheme of combining double-round fermentation of 15-20% of fermented grains at the bottom of a cellar, mother grain acidity / starch double-index screening, precise regulation and control of sterile air in three-round fermentation / feeding before entering the cellar, and segmented distillation and graded storage is adopted. The process can improve the fermented grain conversion efficiency and stabilize the acidity of a fermentation system; the content of characteristic flavor substances such as ethyl hexanoate is greatly increased, and the flavor ratio is balanced; the sensory quality of raw wine is improved, and the cellar aroma and the ester aroma are stronger. The technological parameter range is feasible through experimental verification, the technical effect is obviously superior to that of a traditional technology, and the method is suitable for producing high-quality Luzhou-flavor liquor.

The present application relates to the technical field of surface treatment, in particular to a kind of biobased degradable cable material and preparation method thereof.Biobased degradable cable material includes 55-65 parts of poly-L-lactic acid and poly-3-hydroxybutyric acid-3-hydroxyhexanoate mixed matrix resin, 4-6 parts of dianhydride modified castor oil polyol, 10-15 parts of polyaminoval, 5-8 parts of nano enhanced filler, 6-10 parts of biobased plasticizer, 0.5-1.0 parts of antioxidant, 8-12 parts of environmentally friendly flame retardant.Dynamic ester bond crosslinking agent dianhydride modified castor oil polyol reaction forms dynamic ester bond crosslinking network, ester bond breakage occurs at high temperature beyond normal working range to release stress, temperature returns to normal and can recombine again;Semi-interpenetrating network enhanced phase polyaminoval forms interpenetrating structure with matrix resin in molecular chain interlacing mode, constructs stable heat-resistant skeleton, effectively inhibits high-temperature deformation, and its biobased structure ensures the overall degradability of the material, realizes the balance of heat resistance and degradability.