45 results about "Ethyl lactate" patented technology

SOLVENT COMPOSITIONS The present invention relates to a solvent composition for solvent-based paints or other coatings characterized in that it comprises a combination of dimethyl glutarate and at least one other compound selected from isobutyl acetate, ethyl lactate, dimethyl 2-methylglutarate, 2-methyltetrahydrofuran, ethyl acetate, cyclopentyl methyl ether, dithoxymethane, dimethyl carbonate, dimethyl succinate, benzyl alcohol, dimethyl adipate, and glyceryl triacetate. Fig. 1

The invention discloses Leishan fish sauce sour essence as well as a preparation method and application thereof. The leishan fish sauce acid essence is prepared from ethyl acetate, absolute ethyl alcohol, ethyl isovalerate, ethyl hexanoate, isoamyl alcohol, furfuryl alcohol, ethyl lactate, ethyl caprylate, acetic acid, diethyl succinate, methyl salicylate, ethyl benzoate, ethyl laurate, hexanoic acid, phenethyl alcohol, 4-methyl guaiacol, ethyl myristate, ethyl palmitate, ethyl oleate, capsicum oleoresin, ethyl phenylacetate and ginger oil. And lactic acid, glycerol triacetate, ocimene, ethyl isovalerate, ethyl butyrate, anethole and phenylacetaldehyde. The Leishan fish sauce sour essence disclosed by the invention is soft and harmonious in overall fragrance, natural and vivid, still has stable flavor characteristics at high temperature, can make up the problem of flavor deficiency in sour soup products, realizes accurate reproduction and controllable release of composite fragrance, improves the standardization level of products, and effectively improves the preference degree of consumers.

The invention relates to pediococcus acidilactici b1274 and application thereof, and belongs to the technical field of beneficial bacterium application. The pediococcus acidilactici b1274 is preserved in the China Center for Type Culture Collection on September 24, 2025, the preservation number is CCTCC M 20252094, and the pediococcus acidilactici b1274 is obtained by separation and purification from distiller's yeast. The pediococcus acidilactici can be used for preparing microbial enhanced distiller's yeast, is applied to brewing of fen-flavor liquor, and can improve the content of ethyl acetate, ethyl lactate and total acid in the liquor and reduce the content of acetaldehyde at the same time. Compared with a production control group, the content of ethyl acetate is increased by 50.0%, the content of ethyl lactate is increased by 8.1%, the total acid is increased by 46.4%, the acetaldehyde is reduced by 48.4%, the brewed white spirit shows the style of faint scent, purity, mellowness, fullness, softness, sweetness, freshness, long aftertaste and mellow and prominent acid ester taste, and a safe and reliable functional strain and a technical scheme are provided for improving the quality of the fen-flavor white spirit.

The application discloses a strain of Staphylococcus carnosus and application of the strain in improving sour taste of soy sauce, and belongs to the technical field of food fermentation. The Staphylococcus carnosus CS1.21 is first isolated from soy sauce mash, and has the characteristics of salt tolerance, strong acid production, ester production and bacteriostasis. The strain is used for fermenting high-salt dilute soy sauce, and can effectively produce lactic acid, acetic acid and succinic acid, and the production of lactic acid, acetic acid and succinic acid is respectively increased by 28.13%, 27.78% and 50.00% compared to the soy sauce without adding the CS1.21. Meanwhile, the accumulation of ester substances is promoted, and the content of the ester substances is increased by 86.23% compared to the soy sauce without adding the CS1.21, wherein the content of ethyl lactate and ethyl acetate is respectively increased by 70.11% and 85.76%. The addition of the Staphylococcus carnosus CS1.21 is beneficial to improving the sour taste of the soy sauce, and can improve the quality and flavor of the soy sauce without adding preservatives.

The utility model discloses a kind of ethyl lactate catalytic esterification reaction equipment, belong to ethyl lactate field.A kind of ethyl lactate catalytic esterification reaction equipment, including reaction box, further include: at least three reaction boxes, fixedly installed in the reaction box, three the reaction box is communicated by pipeline each other, the reaction box is fixedly connected with several baffle in, make the reaction box inner chamber form a serpentine water channel;The utility model is set up by three reaction boxes, can effectively delay ethyl lactate raw material flow, make it and the catalytic piece on the flow guide seat fully contact, improve ethyl lactate catalytic esterification quality, and, under the condition that ethyl lactate raw material is continuously injected, reaction box inside can form a stable reaction area, to realize continuous processing, effectively improve the efficiency of ethyl lactate catalytic esterification.

This invention discloses a process for producing sake based on multi-strain mixed fermentation and its flavor profile, belonging to the field of sake brewing technology. This invention provides a method using japonica rice from Northeast China as raw material, employing multi-strain, sequential low-temperature fermentation to regulate ester, acid, and alcohol production during the sake fermentation process. This results in a sake product with flavor compounds at levels and proportions comparable to Japanese sake. The strains include *Rhizopus oryzae*, *Rhizopus chinensis*, *Issaccharomyces orientalis*, and *Saccharomyces cerevisiae*. Compared to existing technologies, the microbial combination, inoculation amount, and inoculation sequence of this invention, combined with synergistic saccharification and fermentation, achieves a ratio of isoamyl acetate, ethyl hexanoate, ethyl lactate, and ethyl acetate, as well as a total ester content, reaching the levels of typical Japanese sake.

The present application relates to the technical field of liquor quality. The present application utilizes the same fungus Eurotium cristatum SXHBTBU1934 CGMCC NO.21026 as yeast to independently ferment wheat, and then utilizes the fermented wheat as "microbial filter material" to filter distilled liquor. The specific method for improving liquor quality by utilizing microbial fermentation material comprises the following steps: filtering liquor body by adsorption material to obtain filtered liquor body; mixing the filtered liquor body with washing-removing material to obtain washing-removed liquor body; and performing fine filtration on the washing-removed liquor body to obtain product liquor body. By utilizing the method of the present application, the compounds such as ethyl oleate and ethyl linoleate, which have negative influence on the flavor of liquor and have viscosity, can be reduced in the liquor body; meanwhile, the acid ester compounds such as ethyl octanoate are increased, which adds fruit flavor to the liquor body, but does not destroy the flavor balance of the four flavoring substances such as ethyl acetate, ethyl lactate, ethyl butyrate and ethyl hexanoate, and does not affect the main taste of the liquor body.

The application belongs to the technical field of petroleum fracturing proppant preparation, and particularly relates to a preparation method of an in-situ self-grown core-shell structure double-repellent micro-nano proppant double-emulsion fracturing fluid. The application uses sodium silicate, a silane coupling agent and ethyl lactate as proppant core material precursor materials, uses a thermosetting resin as a proppant shell layer precursor material, and uses double-repellent modification materials and a drag-reducing agent as precursor materials of the double-repellent surface, so that the cost is reduced, and the strength of the proppant and the flow permeation and drag reduction capacity thereof are improved.

The invention relates to the technical field of perfume synthesis, in particular to an efficient hydrolysis process in perfume synthesis, which comprises the following steps: mixing ethyl lactate, ethyl 3-chloropropionate and ethanol, and reacting under the conditions of metal sodium and heating reflux; after the reaction is finished, distilling off the ethanol under reduced pressure, neutralizing the residual reaction liquid with dilute sulphuric acid, extracting with an organic solvent, separating the liquid to obtain an organic phase, and concentrating the organic phase under reduced pressure to obtain a 2-methyl-4-methyl ester tetrahydrofuran-3-ketone crude product; the method comprises the following steps: heating a 2-methyl-4-methyl ester tetrahydrofuran-3-ketone crude product under the catalysis of cationic resin to hydrolyze, filtering out the cationic resin, extracting with an organic solvent, separating liquid to obtain an organic phase, concentrating under reduced pressure, and rectifying to obtain breadone. According to the method for synthesizing breadone, use of a large amount of acid water is avoided, output of a large amount of waste acid is avoided, the process is more environmentally friendly, meanwhile, the yield is high, the steps are simple, and the industrial production prospect is wide.

The invention belongs to the technical field of chemical processes, and particularly relates to a method for continuously synthesizing pyruvic acid through catalytic oxidation of ethyl lactate and coupled reaction rectification. According to the method, ethyl lactate and hydrogen peroxide are used as raw materials, a titanium silicalite molecular sieve is used as a catalyst, pyridine-2-formic acid is added as an auxiliary agent, ethyl pyruvate is synthesized in a tubular reactor filled with the catalyst, then under the condition of reduced pressure, pyruvate is hydrolyzed through a continuous reactive distillation tower, and a pyruvic acid water solution is obtained at the tower bottom. According to the invention, a tubular reactor model is adopted, the side reaction of hydrogen peroxide caused by backmixing of kettle reaction is solved, meanwhile, pyridine-2-formic acid is added as an auxiliary agent, the invalid decomposition of hydrogen peroxide in the catalytic oxidation process is solved, and the utilization rate of hydrogen peroxide is improved. Reaction rectification is coupled in the ethyl pyruvate hydrolysis process, continuous hydrolysis of ethyl pyruvate is achieved, a reaction section is filled with styrene resin with sulfonic acid groups to catalyze hydrolysis of ester, the reaction rate is increased from the thermodynamic angle, ethyl alcohol is promoted to be moved out of a system in the decompression hydrolysis kinetics, the reaction time is greatly shortened, and the yield is increased. And high-efficiency, continuous and green synthesis of pyruvic acid is realized.

The application discloses a water-soluble morpholine lactic amide acrylate bio-based monomer and a polymer thereof, and belongs to the technical field of bio-based polymers.The application uses a lactic acid derived green solvent (methyl lactate, ethyl lactate, propyl lactate, butyl lactate and the like) and morpholine to synthesize morpholine lactic amide ester (MML) through amine ester exchange under solvent-free mild conditions, then synthesizes a polymerizable morpholine lactic amide acrylate monomer (MMLA) through acylation reaction and tests the performance through various means.The research finds that the water-soluble bio-based monomer (MMLA) of the morpholine lactic amide acrylate developed by the application has lower toxicity than traditional acrylate monomers and can be polymerized in a more environmentally friendly system, and the water-soluble polymer obtained after polymerization has high glass transition temperature and good thermal stability, and the water-soluble polymer with lower biological toxicity and good stability has application prospects in the development of biomedical fields.

The invention provides application of an ethyl lactate solution in separation and recovery of a decommissioned photovoltaic module and a dissociation and recovery method of the decommissioned photovoltaic module, and belongs to the technical field of photovoltaic module recovery. The invention provides a green solvent and pyrolysis combined dissociation and recovery method for an out-of-service photovoltaic module. An aluminum outer frame, a junction box and glass of the out-of-service photovoltaic module are dismantled through a dismantling process; performing layered dissociation on the residual photovoltaic laminated structure by adopting an ethyl lactate solution, separating the back plate and removing an aged and damaged fluorine film on the outermost layer of the back plate on the premise of not damaging a core structure to obtain a semi-finished product of the back plate; and the battery piece and the EVA adhesive layer adhered to the battery piece are subjected to heat treatment in the presence of calcium oxide, so that the separation of the battery piece and the EVA adhesive layer and the enrichment of the calcium-containing mixed material are realized, and the pure battery piece is obtained. The recycling efficiency of the photovoltaic module is remarkably improved, the energy consumption is reduced, the environmental pollution is reduced, and a new thought is provided for resource recycling of the photovoltaic module.

The utility model belongs to the technical field of chemical production, and particularly relates to a recyclable enzymic method catalytic ethyl lactate fixed bed reactor which comprises an outer box body, inner box bodies, an upper sealing block, an access pipe and a discharge pipe, a lower sealing block is arranged below the upper sealing block, and the inner walls of the two inner box bodies are respectively connected with an upper sliding plate and a lower sliding plate in a sliding mode. The upper sliding plate and the lower sliding plate are provided with receding holes matched with the upper sealing block and the lower sealing block, and an inner connecting ring is installed on the inner box body. When the fixed bed is replaced, the catalytic operation of ethyl lactate does not need to be interrupted, and when the fixed bed between the outer box body and the inner box body needs to be replaced, the sealing column seals the sealing hole under the pushing of the fixing ring, the rotating sleeve is rotated to block the material flow direction, and the lower threaded ring can be separated for replacement; when the fixed bed in the inner box body is replaced, the upper sliding plate and the lower sliding plate are pushed to separate the inner cavity of the inner box body, the rotating sleeve is rotated to isolate the cavity, and the connecting rod and the lower sliding plate are separated.

The present application relates to the technical field of organic synthesis, in particular to a synthesis process of piroctone olamine for dandruff removal. The process comprises: in a mixed solvent of ethyl lactate, propylene carbonate and water, 4-methyl-6-(2,4,4-trimethylpentyl)-2H-pyran-2-one is reacted with aqueous hydroxylamine in the presence of immobilized bifunctional phase transfer catalytic resin and potassium carbonate, hydroxylamine is added by A and B two parts of staged temperature control, and pH is accurately adjusted to 7-8; after reaction, the catalyst and impurities are separated by grading filtration, the filtrate is purified by seed-induced crystallization and activated carbon decolorization recrystallization. The product of the process has a purity of more than 99%, the related substances are less than 0.5%, the platinum-cobalt color is less than 20 Hazen, the crystal particle size is uniform, the suspension stability in shampoo is good, and the catalyst can be recycled and is environmentally friendly.

The invention discloses synchronous degradation type gravure ink for a degradable plastic film and a preparation method of the synchronous degradation type gravure ink, and relates to the field of environment-friendly ink. Comprising the following components: 35-55 parts of biocompatible binder resin, 12-18 parts of an organic pigment, 30-40 parts of a bio-based solvent, 0.5-1.5 parts of nano titanium dioxide and 1-2 parts of a dispersant, the biocompatible binder resin is a PLA, PCL and PBAT ternary block copolymer, the molecular weight of PBAT is 3000-5000 g / mol, the bio-based solvent is a composite solvent of ethyl lactate and gamma-valerolactone, and the dispersing agent is a nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide nano titanium dioxide. The mass ratio of the ethyl lactate to the gamma-valerolactone is 1: (0.5-2). The ink prepared by the invention has excellent adhesive force, keeps complete performance along with bending and stretching of a base material, and is free of sedimentation and stable in viscosity after being stored for 30 days; compared with the prior art, the printing ink disclosed by the invention has the advantages that the glossiness can reach 85%, and meanwhile, the printing ink shows highly synchronous degradation behaviors on PLA (Polylactic Acid) and PBAT (Poly (Butyleneadipate-co-Terephthalate)) base materials at 30-day and 60-day test points.

The invention relates to the technical field of medicines, and particularly discloses compound lidocaine cream as well as a preparation method and application thereof. The invention provides compound lidocaine emulsifiable paste. The compound lidocaine emulsifiable paste is specifically prepared from the following components in parts by weight: 22 to 26 parts of lidocaine, 22 to 26 parts of prilocaine, 13 to 17 parts of solubilizer, 9 to 11 parts of carbomer, 3 to 5 parts of sodium hydroxide and 0.02 to 0.06 part of penetration enhancer, the total amount is 1000 parts. The solubilizer is formed by mixing polyoxyethylene hydrogenated castor oil and poloxamer 188 in a weight ratio of (10-15): (1-4); the penetration enhancer is prepared by mixing L-ethyl lactate and oleic acid in a weight ratio of (1-4): (0.2-1). The compound lidocaine emulsifiable paste prepared by the invention has good safety, and the compound lidocaine emulsifiable paste has the effects of quicker effect taking, deeper anesthetic effect and longer duration time.

Janus dry facial mask based on birch emulsion electrospinning and its preparation method belong to the field of beauty and skin care materials technology. This invention first utilizes green bio-based solvents ethyl lactate or methyl lactate to optimize the extraction of betulinol from birch bark using an ultrasound-assisted method. Then, employing emulsion electrospinning technology and a Janus bilayer structure design, an asymmetric bilayer dry facial mask is constructed: the hydrophobic layer is made of biodegradable polylactic acid electrospinned, acting as a water-locking barrier to delay moisture loss; the hydrophilic layer is made by uniformly dispersing birch bark ethyl lactate extract (oil phase) in a mixed aqueous solution of polyvinyl alcohol and chitosan through high-speed shear emulsification to form a stable O / W type emulsion, followed by electrospinning to create a nanofiber membrane encapsulating active ingredients. The Janus dry facial mask exhibits excellent moisturizing, antioxidant, and anti-inflammatory effects, and requires no preservatives for dry storage and transportation. The process is simple and suitable for industrial production.

The invention discloses a pet nutritional composition capable of reducing peculiar smell of excrements and a preparation method of the pet nutritional composition. The pet nutritional composition is prepared by the following steps: performing pre-emulsification and high-shear emulsification on functional components such as ethyl lactate, pig blood protein peptide, a pericarpium citri reticulatae extract, a yucca extract and phytic acid; the microcapsule is encapsulated in a sodium alginate-calcium chloride gel network integrated with nano zeolite powder and agaro-oligosaccharide through ionic gelation to form a functional microcapsule base material; meanwhile, the lactobacillus is embedded in the sodium alginate-chitosan composite gel microcapsule by adopting an emulsification-internal gelation technology. And finally, mixing the prebiotics with mannan oligosaccharide and fructo-oligosaccharide compounded prebiotics. Through split type embedding and differentiated wall material design, the problems that probiotics are prone to inactivation and components interfere with one another are solved, intestinal tract targeted rapid release of functional components and sequential precise delivery of the probiotics are achieved, a triple deodorization mechanism of source inhibition, efficient adsorption and micro-ecological regulation is synergistically exerted, and the deodorization effect is good. The deodorization efficiency and the action durability are obviously improved.

The invention relates to a green preparation method of ethyl pyruvate. According to the method, ethyl lactate is taken as a raw material and is subjected to continuous gas-liquid phase oxidation in a fixed bed in the presence of oxygen-containing gas, a Mn-Cu-Co ternary oxide is loaded on a nitrogen-containing porous carbon catalyst, air calcination and CO2 atmosphere activation are matched, and pretreatment can be carried out in ethyl lactate / carrier gas so as to regulate and control the metal valence state and the oxygen vacancy structure. Water and trace lactic acid amide, glycine and alanine are introduced into the raw material solution, and optional phytic acid / phytate is combined with choline chloride to construct a weak coordination and hydrogen bond network to adjust the interface oxidability; the fixed bed is provided with double reaction zones for segmented temperature control and oxygen supply along the material flow direction. According to the method, high conversion of ethyl lactate and high selectivity of ethyl pyruvate are realized under relatively mild conditions, byproducts are few, and the stability of the catalyst is good.

The invention discloses a novel 2D chiral composite material utilizing in-situ polymerization and application thereof, by preparing interlayer ionic clay with lauryl sodium sulfate intercalation, and adopting an in-situ polymerization method, chiral molecules R-limonene and photoresponse molecules acrylonitrile are sequentially and alternately copolymerized in Mg-Al layered double hydroxide, so that the novel 2D chiral composite material utilizing in-situ polymerization is obtained. The novel 2D chiral composite material is prepared; lDH-S-C2 is combined with (R)-mandelic acid and (D)-ethyl lactate in a co-assembly mode to enhance fluorescence and precipitate, the purpose of visually recognizing the enantiomers is achieved for the first time, chiral signal transmission and amplification are achieved, after different metal ions are added into a DMF solution, recognition signals of LDH-S-C2 to the mandelic acid enantiomers are remarkably amplified, and especially when Ti < 4 + > is introduced, the recognition signals of LDH-S-C2 to the mandelic acid enantiomers are remarkably amplified. The fluorescence intensity of an assembly of LDH-S-C2 and (S)-mandelic acid is remarkably quenched, and is accompanied by an obvious macroscopic color change.

The invention provides a dispergator and a preparation method and application thereof.The dispergator comprises a main agent and an auxiliary agent, the auxiliary agent comprises a surfactant and a dispersing agent, and the surfactant comprises at least one of a fatty alcohol-polyoxyethylene ether compound, polyether modified siloxane, APG alkyl glycoside, alkanolamide, sodium dodecyl benzene sulfonate and dodecyl acetic acid; the dispersing agent is prepared from at least one of trihydroxy polyoxypropylene ether, N-methyl pyrrolidone, APG alkyl glycoside, ethyl lactate, D-limonene, sodium dodecyl benzene sulfonate and dodecyl acetic acid. According to the dispergator provided by the invention, the main agent has strong dissolving capacity and enters a polymer of an adhesive to swell and dissolve the polymer, so that degumming is completed; the auxiliary agent is used for reducing the liquid surface tension, enhancing the permeability of the main agent and improving the degumming efficiency.

The invention belongs to the technical field of preparation of petroleum fracturing propping agents, and particularly relates to a preparation method of an in-situ authigenic core-shell structure amphiphobic micro-nano propping agent double emulsion fracturing fluid. Sodium silicate, a silane coupling agent and ethyl lactate are used as proppant core material precursor materials, thermosetting resin is used as a proppant shell layer precursor material, and an amphiphobic modification material and a drag reducer are used as amphiphobic surface precursor materials, so that the cost is reduced, and meanwhile, the proppant core layer is more uniform. The strength and the seepage resistance reduction capability of the proppant are improved.

A chemoenzymatic manufacturing process for the preparation of high value chemicals includes the enzymatic oxidation of ethanol using an oxidizing biocatalyst to form an acetaldehyde intermediate. In addition, the process includes contacting of the acetaldehyde intermediate with a carboligating biocatalyst to form pyruvic acid. Further, the process includes reacting pyruvic acid with ethanol to form ethyl pyruvate. Still further, the process includes contacting the ethyl pyruvate with a metal catalyst and hydrogen to form ethyl lactate. The process also includes hydrolyzing the ethyl lactate to produce lactic acid. Moreover, the process includes contacting at least a portion of the lactic acid with a dehydrating catalyst to form acrylic acid. In addition, the process includes contacting at least a portion of the lactic acid with a metal catalyst and hydrogen to form propylene glycol and n-propanol.

The application discloses a high-ethanol-tolerant Lactobacillus helveticus and application thereof. The Lactobacillus helveticus is named Lactobacillus helveticus FJL4-UV4, and the preservation number is GDMCC NO.62957. The Lactobacillus helveticus is obtained by ultraviolet mutagenesis of a wild Lactobacillus helveticus FJL4 isolated from a Chinese rice liquor fermentation liquor. The Lactobacillus helveticus FJL4-UV4 provided by the application overcomes the defects of the wild Lactobacillus helveticus FJL4 in high-ethanol tolerance, and promotes the generation of ethyl lactate under high-ethanol conditions. The Lactobacillus helveticus FJL4-UV4 is used for solving the problem of low ethyl lactate content in the fermentation liquor in the Chinese rice liquor production process, and the ability of the Lactobacillus helveticus FJL4-UV4 in increasing the ethyl lactate content in the fermentation liquor is significantly improved compared with the wild type.

Provided is an activity improver containing a novel active ingredient. The activity improver contains ethyl lactate as an active ingredient. In one embodiment, the activity improver may have an ethyl lactate content of 2-700 ppm. The activity improver may furthermore contain water as a solvent.

The present application relates to a kind of mixed bacteria activated yeast reinforced high-temperature Daqu esterification capacity method.The present application is inoculated in inorganic nitrogen culture with Rhizopus arrhizus and Hansenula polymorpha, and incubation activation is 1-3 days, then inoculates Saccharomyces cerevisiae, incubation activation is 3-5 days, then inoculates Lactobacillus plantarum, and continue to activate 5-7 days, separate bacterial body;The obtained isolated bacterial body is inoculated again in inorganic nitrogen culture medium, and repeated delay acid co-activation until activation is completed, and bacterial body is separated with fermentation liquor;Then, activation seed liquid preparation, second-order koji making and Daqu fermentation are carried out, and the koji is obtained.The total bacteria amount in the koji obtained by the present application can be increased by 4.12 × 10 7 cfu / g;Hexanoic acid ethyl ester, ethyl lactate, ethyl acetate is respectively compared with traditional block koji to increase 38.21 μg / g, 39.95 μg / g and 48.06 μg / g, and ester diversity is increased by 6.

The invention discloses a synthesis method of 3-mercaptobenzoic acid, and belongs to the technical field of organic synthesis, the synthesis method comprises the following steps: mixing benzoic acid with a first part of chlorosulfonic acid, reacting at 100-110 DEG C, adding a second part of chlorosulfonic acid, reacting at 120-130 DEG C, cooling, and stirring at 0-5 DEG C to obtain 3-chlorosulfonyl benzoic acid; the preparation method comprises the following steps: mixing anhydrous ethyl lactate, tetrabutylammonium iodide and 3-chlorosulfonylbenzoic acid in an inert environment, heating to 50-55 DEG C, adding a sodium iodide / acetonitrile solution, keeping the temperature, heating to 80-85 DEG C, adding triphenylphosphine, adding formic acid, reacting at 80-85 DEG C, cooling to 60-65 DEG C, adding water, and reacting; the synthesis method provided by the invention can solve the problems of high raw material toxicity, low product yield, poor quality, serious three-waste pollution, high cost and unsuitability for industrialization in the synthesis method of 3-mercaptobenzoic acid in the prior art.

The invention belongs to the technical field of microorganisms and baijiu brewing, and particularly relates to bacillus amyloliquefaciens capable of producing ethyl lactate and application of the bacillus amyloliquefaciens to improvement of fermented ethyl lactate of rice-flavor baijiu. The strain is separated from later-stage fermentation liquor of rice-flavor liquor, and has the characteristics of acid resistance, high-concentration ethanol resistance and high-yield ethyl lactate. According to the invention, the strain is added in the later period of fermentation of the rice-flavor liquor for enhanced fermentation, and then physical temperature control is carried out, so that the concentration of ethyl lactate can be synergistically increased, flavor substances such as total ester of the rice-flavor liquor can be remarkably increased, and meanwhile, the liquor yield is not influenced, so that the compound fragrance of rice wine is increased, and the liquor quality is improved. The method is good in stability among batches, can obtain the rice-flavor baijiu with high ethyl lactate content, and is suitable for popularization and application in baijiu brewing.

The invention belongs to the technical field of feed additives, and particularly relates to a natural marine product enzymolysis type aquatic feed phagostimulant and a preparation process thereof.The natural marine product enzymolysis type aquatic feed phagostimulant is prepared from enzymatic hydrolysate, fish oil, lactic acid, ethyl lactate, isovaleric acid, pyridine, a trimethylamine aqueous solution, sodium glutamate and a carrier rice bran and hull. Then adding the following components according to the following proportion: 8.5% of fish oil, 0.3% of lactic acid, 0.25% of ethyl lactate, 0.1% of isovaleric acid, 0.05% of pyridine, 1% of a trimethylamine aqueous solution, 2% of sodium glutamate and the balance of carrier rice bran and hull, so that the water content is lower than 18%; the fishy smell of the fish meal of the feed can be obviously stimulated, the dosage of the fish meal is reduced, and the problem that a common phagostimulant is poor in spreading effect in a water body is successfully solved; high-temperature granulation and puffing processing can be tolerated; the feed additive is rich in various amino acids, has a strong and lasting food calling effect on aquatic animals, and can remarkably improve the food consumption, promote growth and reduce the feed coefficient.

This invention belongs to the field of microbial fermentation technology, specifically relating to a new strain of Pichia pastoris (Kudelazwiel). Pichia Kudryavzevii ) and its applications. To stabilize and target the production of ethyl acetate in baijiu (Chinese liquor), this invention screens, isolates, and identifies a strain of *Pichia pastoris* capable of high ethyl acetate production from soy sauce-flavored baijiu mash. Pichia kudriavzevii LJ-5, with accession number CCTCC NO:M20252599, is a strain that enhances the fermentation of lees. In baijiu brewing, it can be used to produce ethyl acetate, ethyl lactate, and other flavor compounds, especially significantly increasing the content of ethyl acetate produced during fermentation. Therefore, this strain can be applied to baijiu production as a functional microbial strain to improve baijiu quality.