884 results about "Hexanoic acid" patented technology

alpha-keto acids and certain precursors and derivatives thereof, particularly those selected from the group which consists of glyoxylic acid, 2-oxo-propanoic acid, 2-oxo-butanoic acid, 3-methyl-2-oxo butanoic acid, 3-methyl-2-oxo pentanoic acid, 4-methyl-2-oxo pentanoic acid, 3-hydroxy-2-oxo-propanoic acid, oxalacetic acid, 2-oxo-glutaric acid, 2-oxo-3-phenyl-propanoic acid, 3-(4-hydroxy-phenyl)-2-oxo-propanoic acid, 2-oxo-1H-indole-3-propanoic acid, 2-oxo-1H-imidazole-4-propanoic acid, 4-methylthio-2-oxo-butanoic acid, 3-mercapto-2-oxo-propanoic acid, 3-hydroxy-2-oxo-butanoic acid, 6-amino-2-oxo-hexanoic acid and 5-guanido-2-oxo-pentanoic acid, and precursors and derivatives thereof that are capable of being formed from or releasing said acids in the use medium, are useful as flavouring ingredients. Such ingredients are useful for preparing flavouring compositions and a wide variety of flavoured foodstuffs to which they impart greater creaminess and bulkiness so that they have heightened effect in the mouth and generally an enhanced mouthfeel. They are also useful for enhancing the sweetness of foods sweetened with natural or artificial sweeteners, and giving it a more natural character.

A process for producing high yields of gamma -hexalactone and 2-pentanone from the corresponding hexanoic acid starting material is carried out with high amounts of oxygen and sugar in the presence of a mold microorganism. Fragrance compositions and foodstuff compositions are augmented and enhanced by the presence of the product compounds.

The invention discloses a preparation method of antibacterial silver/chitosan nano fibrous membranes, pertaining to the preparative technologies of nano composite fibrous membranes. The process of the method includes that a chitosan hexanoic acid solution, a silver nitrate aqoeous solution, a sodium borohydride water solution and an ethylene epoxide hexanoic acid solution are prepared and mixed to form compounded latex according to the volume ratios of the chitosan hexanoic acid solution and the silver nitrate aqoeous solution as well as an NaBH4 aqueous solution. The compounded latex and the ethylene epoxide hexanoic acid solution are mixed according to the volume ration to prepare a spinning solution, then the spinning solution is added into an injector in an electrostatic spinning device and electrostatic spinning is carried out to form the fibrous membrane. Crosslinking treatment is carried out to the fibrous membrane to obtain the antibacterial silver/chitosan nano fibrous membrane. The antibacterial silver/chitosan nano fibrous membrane of the invention has the advantages that the preparation process is simple; the prepared membrane material has broad-spectrum bactericidal property and comparatively high fatality rate to Bacillus coli, Bacillus subtilis, Staphylococcus aureus and Pseudomonas aeruginosa for 24 hours.

The invention encompasses the synthesis of (S)-(+)-3-(aminomethyl)-5-methylhexanoic acid, (S)-Pregabalin, via the intermediate, (3R)-5-methyl-3-(2-oxo-2{[(1R)-1-phenylethyl]amino}ethyl)hexanoic acid.

Described is a method for the production of pure or mixed metal oxides, wherein at least one metal precursor that is a metal carboxylate with a mean carbon value per carboxylate group of at least 3, e.g. the 2-ethyl hexanoic acid salt, is formed into droplets and e.g. flame oxidized. The method is performed at viscosities prior to droplet formation of usually less than 40 mPa s, obtained by heating and/or addition of one or more low viscosity solvents with adequately high enthalpy.

The invention discloses a plant growth regulator composite containing diethyl aminoethyl hexanoate and cycogan, which is characterized in that the plant growth regulator is liquid, powder or granula prepared by taking diethyl aminoethyl hexanoate (hexanoic acid 2-(diethylamino) ethyl ester) or salts thereof and the cycogan and adding with carriers or solvent, stabilizer and surfactant. The invention has the advantages of novel design, good effect in increasing yield for various crops and obviously-improved product quality, can effectively enhance stress resistance (such as lodging resistance, disease resistance, drought resistance, cold resistance, heat resistance, chemical injure resistance and the like), and has simple production technology, simple and convenient use and vast popularization and application prospect.

The invention discloses a method for making wine through grain of distiller of strong aromatic Chinese spirits by secondary fermentation, which comprises the following steps: utilizing strong aromatic Chinese grain of distiller as a substrate; adding yeast in the grain of distiller for piling fermentation; adding distillation tails, yellow water, esterase, acetic acid fermentation liquor and the like and stirring evenly; and then sealing by a plastic film for making the wine through the secondary fermentation. The invention fully utilizes a special culture medium, i.e. odour precursor and distilled grain remained in the grain of distiller to generate odour substances through the secondary fermentation of the grain of distiller. The grain of distiller is piled up after the yeast is added in, which aims to prompt the self-growth of the microorganism so as to lay a basis for esterification. The invention can also utilize the starch and the like in the grain of distiller so as to improve the utilization ratio of the distilled grain. The plastic film is used for sealed anaerobic fermentation after the piling fermentation so as to improve the production of the ester, and effectively avoid the discordant substance to body generated by microorganism in pit mud. The novel wine which is light on the palate and balance in fragrance is obtained by distillation under normal pressure after the fermentation.

Low molecular weight acetal, alcohol, O-acylated alcohol and ester compounds are identified that block the odor of specific carboxylic acids especially propionic acid, butyric acid, isovaleric acid 3-methyl-2-hexenoic acid and hexanoic acid. These compounds exhibit surprisingly high odor blocking properties and are therefore useful additives to compositions such as: a) personal care products including underarm deodorant and antiperspirant, hair shampoo and conditioner, toilet soap, and skin lotion; b) fabric care products including laundry detergents, fabric conditioners, and fabric fresheners; c) pet care products including deodorant, shampoo, conditioner, and d) home care products including air fresheners, carpet fresheners, surface cleaners and hand wash dish detergent.

The invention discloses a hexanoic acid bacterium and liquid pig mud bacterium mixed bacterial solution culture method, which comprises: culturing hexanoic acid bacteria in a hexanoic acid bacterium culture medium and liquid pig mud bacteria in a liquid pig mud culture medium separately; inoculating 1 percent of hexanoic acid bacterium strain and 9 percent of liquid pig mud bacterium strain into a Carlsberg flask, a stainless stain seed tank and a stainless stain fermentation tank in turn; and thus, obtaining the hexanoic acid bacterium and liquid pig mud bacterium mixed bacterial solution. The hexanoic acid bacterium and liquid pig mud bacterium mixed bacterial solution prepared by the method, when used for maintaining pig mud and culturing artificial pig mud, can solve the problem that the artificial addition of calcium matters into the pig mud promotes the aging of the pig mud and the problem of complex operation, low and instable quality in tank-type culture and also solve the problem of undesirable use effect of hexanoic acid bacteria and liquid pig mud bacteria, which are used alone.

The invention relates to a degradable and nontoxic medical polyurethane material and a preparation method thereof, belonging to the technial field of biomedical high polymer materials. Raw materials thereof adopt poly (epsilon-caprolactone) dibastic alcohol (PCL) as a soft segment and L-lysine ethyl ester diisocyanate (LDI-E) or L-lysine methyl ester diisocyanate (LDI-M) and chain extender L-lysine ethyl ester (Lysine-E) or L-lysine methyl ester (Lysine-M) as a hard segment, wherein the number-average molecular weight of the poly (epsilon-caprolactone) dibastic alcohol ranges from 500 to 5000.The polyurethane of the invention is degradable, and degradation products thereof are harmless to human bodies; as a great amount of carbamido is contained in the polyurethane, the mechanical property and the degradation property of the polyurethane are improved; and the degradation products are completely nontoxic, the degradation product of lysine can neutralize 6- hydroxyl hexanoic acid generated by soft segment degradation, the pH value of adjacent tissues can not be changed, and therefore the polyurethane prepared by the invention has favorable biocompatibility.

The invention provides herbaceous plant nutritive water based on an emulsified microcapsule and a preparation method of the herbaceous plant nutritive water. The preparation method comprises the following specific steps: mixing hydrogenated vegetable oil, low erucic acid rapeseed oil , siloxane, microcrystalline wax and diglycerol, heating and uniformly stirring, and performing heat reservation and sterilization to obtain an oil phase; adding ethylene glycol, propylene glycol, glycine betaine, urea, poly-sodium glutamate, triethanolamine, caprylhydroxamic acid and hexylene glycol into deionized water, heating and uniformly stirring, performing heat preservation and sterilization to obtain a water phase; adding the oil phase into the water phase, performing heating, homogenization and low-speed stirring, adding cetyl ethyl hexanoate and stearic acid, then slowly adding PEG-40 hydrogenated castor oil and a microcapsule wall material, cooling, adding tremella, centella asiatica, polygonum cuspidatum, scutellaria baicalensis, tea leaves, glycyrrhiza glabra, female chrysanthemum, rosemary leaves, beer saccharomycete and grape fruit cell extract active components, and adding chondrus crispus extracts, bio-saccharide gum-1, diglycerol, palmitoyl tripeptide-1 and essence for mixing to obtain the herbaceous plant nutritive water based on the emulsified microcapsule.

The invention discloses an efficient multi-element compound fertilizer, which consists of hexanoic acid 2-(diethylamino) ethyl ester, polypeptide chelated potassium, polypeptide L-aspartate potassium, urea, potassium chloride, diammonium phosphate, calcium superphosphate, potassium dihydrogen phosphate, calcium-magnesium phosphate fertilizer, ammonium chloride, thiamine, zinc chloride, borax, ferrous sulphate, copper sulphate, manganese sulfate, sodium molybdate, cobalt chloride and silicon-manganese phosphate fertilizer. The efficient multi-element compound fertilizer has the advantages of promoting the growth of crops, improving the disease resistance of the crops, resisting falling, insect pests and frozen injury, improving the fertilizer effect, improving the soil, accelerating the growth of branches and leaves, reinforcing the photosynthesis, accelerating the growth of roots, enhancing the drought resistant capacity, improving the yield of the crops and improving the quality of fruits. The yield of grain crops is averagely increased by more than 26 percent, the yield of economic crops is averagely increased by more than 33 percent, and the yield of vegetable crops is averagely increased by more than 42 percent.

The invention discloses a method for detecting gutter oil. The method comprises: ①adding the oil sample to be tested into a headspace bottle, shaking the headspace bottle at a temperature of 40°C-150°C, and then balancing for 10min-120min; ②use The syringe absorbs the gas in the upper layer of the balanced headspace bottle and injects it into the gas chromatography-mass spectrometry instrument, and obtains the gas chromatography-mass spectrometry spectrum under the set chromatographic conditions and mass spectrometry conditions; Chromatography-mass spectrometry is used for qualitative analysis; when it is detected that the oil sample to be tested contains fatty acids, it is determined that the oil sample to be tested is waste oil or contains waste oil; the fatty acids are acetic acid, propionic acid, butyric acid, One or two or more of valeric acid and caproic acid. The method of the invention has good accuracy and is applicable to the detection of all waste oils.

An external preparation for the skin containing isononyl 2-ethylhexanoate and/or 2-ethylhexyl 2-ethylhexanoate (i.e., component (a)); an oil-in-water emulsion type skin cosmetic composition containing the ingredient (a), (b) one or more ingredients selected from higher fatty acids and higher alcohols which are solid to semi-solid at an ordinary temperature (25° C.), (c) a homopolymer, copolymer, cross polymer, or mixture containing one or more ingredients selected from 2-acrylamide-2-methylpropane sulfonic acid and acrylic acid and its derivatives as constituent units and (d) one or more ingredients selected from nonionic surfactants having an HLB value of 9 or more; and an oil-in-water or a water-in-oil emulsion type sunscreen cosmetic composition containing (a) 2-ethylhexyl 2-ethylhexanoate and/or isononyl 2-ethylhexanoate, (b) an ultraviolet absorber, (c) an ultraviolet scatterer and (d) a silicone oil.

The invention discloses a polyamide thermosol, containing the following copolymer monomers: A. one or many kinds of hexanolactam, amino-caproic acid, 11-aminoundeeanic acid and laurolactam; B. one or many kinds of mixtures formed of C4-C9 aliphatic dicarboxylic acid and equivalent C2-C12 aliphatic diamine or their nylon salts; C. one or many kinds of mixtures formed of C10-C15 long-carbon chain aliphatic dicarboxylic acid and equivalent C4-C12 diamine or vinyl-amine or their nylon salts. It has high melting point, narrow fusing temperature range, high bonding strength, good low-temperature flexibility and high-temperature resistance, and can be applied to binding metal material, metal-plastic laminated composite, and car light.

The invention provides a Pichia guilliermondii X25 which is enriched and screened from soil, has high diastereoselectivity and is a carbonyl reductase active microbial new strain, and application of the Pichia guilliermondii X25 in preparation of 6-cyano-(3R, 5R)-dyhydroxyl hexanoic acid tert-butyl ester by biological asymmetric reduction (R)-6-cyano-5-hydroxyl-3-carbonyl hexanoic acid tert-butylester. The strain is preserved in China Center for Type Culture Collection (CCTCC), the address is Wuhan university, Wuhan, China, the post code is 430072, the CCTCC No. is M 2011386, and the preservation date is November11th,2011. The optical pure 6-cyano-(3R, 5R)-dyhydroxyl hexanoic acid tert-butyl ester prepared by using carbonyl reductase generated by the Pichia guilliermondii X25 to convert (R)-6-cyano-5-hydroxyl-3-carbonyl hexanoic acid tert-butyl ester is high in stereoselectivity, mild in reaction condition and environment-friendly.

The invention relates to a ketone reductase mutant and a preparation method thereof. The ketone reductase mutant comes from a saccharomyces cerevisiae wild type ketone reductase, is capable of converting 5-hydroxyl-3-oxohexanoate into corresponding cis 3,5-dihydroxylhexanoate, and has one or more mutants of I46V, S127N and Q144K. The ketone reductase mutant has obvious high specific enzyme activity which is improved by 2-100 times compared with that of the wild type ketone reductase, can be utilized to biologically catalyze 5-hydroxyl-3-oxohexanoate to product corresponding cis 3,5-dihydroxylhexanoate. The reaction conditions are mild, requirements on equipment are low, the production process does not need high temperature or cooling, and energy consumption is low. Because enzyme catalysis has efficient specific selectivity, the process of producing the statin medicine key intermediate cis 3,5-dihydroxylhexanoate, does not generate by-products, and purification is convenient. Additionally, the solvent employed in the reaction is mainly water, "three wastes (waste gas, waste water and industrial residue)" discharge is low, and the reaction is green and environment-friendly.

The invention discloses a method for preparing 2-ethyl hexanoic acid by catalytically oxidizing 2-ethylhexanal by molybdovanadophosphoric acid, and relates to a method for preparing a chemical preparation. The method comprises the following steps: weighing molybdovanadophosphoric acid and dissolving the molybdovanadophosphoric acid in distilled water at first and then in hydrochloric acid to prepare a catalyst solution; adding 2-ethylhexanal and the prepared catalyst in an ordinary-pressure reaction device, slowly heating and stirring the mixture, regulating oxygen flux, and starting to introduce oxygen when the temperature rises to the reaction temperature; after the reaction is ended, separating out the aqueous phase solution on the lower layer to obtain organic phase matter on the upper layer; and depressurizing and distilling the organic phase matter to obtain colorless transparent and pungent oily liquid, 2-ethyl hexanoic acid. By changing the ratio of molybdenum to vanadium of the catalyst and optimizing the reaction condition, the conversion rate of the 2-ethylhexanal reaches above 99%, and the selection and yield of the 2-ethyl hexanoic acid reach above 98% respectively.

The invention provides an esterification method of pentaerythritol, which comprises the following step: under the action of a tin catalyst, carrying out esterification reaction on pentaerythritol and saturated fatty acid to obtain pentaerythritol ester, wherein the saturated fatty acid is one or more of butyric acid, valeric acid, hexanoic acid, heptylic acid, octanoic acid, pelargonic acid and capric acid. The esterification method provided by the invention has the advantages of higher product yield, higher product quality, simple esterification after-treatment and low pollution. The experimental result indicates that the conversion rate of the esterification reaction is greater than 99.5%, and the hydroxyl value in the reaction product is lower than 1mg KOH/g.

Bacterial polynucleotides and polypeptides are provided in which the polypeptides have a dehydrogenase activity, such as an alcohol dehydrogenase (ADH) activity, an uronate, a 4-deoxy-L-erythro-5-hexoseulose uronate (DEHU) ((4S,5S)-4,5 dihydroxy-2,6-dioxohexanoate) hydrogenase activity, a 2-keto-3-deoxy-D-gluconate dehydrogenase activity, a D-mannuronate hydrogenase activity, and/or a D-mannnonate dehydrogenase activity. Methods, enzymes, recombinant microorganism, and microbial systems are also provided for converting polysaccharides, such as those derived from biomass, into suitable monosaccharides or oligosaccharides, as well as for converting suitable monosaccharides or oligosaccharides into commodity chemicals, such as biofuels. Commodity chemicals produced by the methods described herein are also provided.

A process for preparing 2-ethyl hexanoic acid features that under the existance of catalyst, which may be Mn(Ac)2, KAc, Cu(Ac)2 or NaAc, or their mixture, the mixture of the raw material containing 2-ethyl hexanal and solvent and the oxygen contained gas take part in oxidizing reaction in a falling-film reactor. Its advantages are short reaction period, less by-reaction, low cost, high transformer rate (more than 99.5%) and high selectivity (more than 95%).

An object is to provide a water absorbent resin composition containing a water absorbent resin as a main component, with excellent deodorant property and antimicrobial property without impairing appearance and absorption characteristics of the water absorbent resin. The water absorbent resin composition according to the first aspect includes a water absorbent resin containing a polyacrylic acid (salt)-based water absorbent resin as a main component, and an extract of bamboo and an extract of tea. The water absorbent resin composition according to the second aspect includes a water absorbent resin containing a polyacrylic acid (salt)-based water absorbent resin as a main component, and at least two kinds of compounds selected from a group consisting of hexanoic acid (salt), ethyl butyrate, and 3-methyl-2-cyclopenten-1-one. In addition, the method for producing the water absorbent resin composition according to the third aspect includes the step of adding an alcoholic solution of an extract of bamboo, before or after polymerization of an unsaturated monomer containing an acrylic acid (salt) as a main component.

The invention discloses a BB cream having whitening, moisturizing and makeup-dizziness preventing functions. The BB cream consists of the following components: glycerol, cyclopentasiloxane, titanium dioxide, cetyl ethyl hexanoate, cetyl PEG/PPG-10/1 polydimethylsiloxane, dipropylene glycol, nicotinamide, caprylic/capric triglyceride, ethylhexyl palmitate, PEG-75 meadowfoam seed oil, hydrogenated polydecene, sodium chloride, quaternary ammonium salt-18 bentonite, white beeswax, argania spinosa kernel oil, tocopherol, CI 77492, panthenol, CI 77491, CI 77499, phenoxyethanol, allantoin, methylparaben, propyl hydroxybenzoate, sodium hyaluronate, essence, EDTA disodium, butylated hydroxytoluene, adenosine and water. By virtue of the meadowfoam seed oil, the adenosine, the argania spinosa kernel oil, the panthenol and the nicotinamide, the functions of the finished BB cream are effectively expanded, so that the BB cream is better in moisturizing performance, makeup-dizziness preventing performance and whitening performance.

The invention relates to a fast cure EVA solar cell adhesive film, and overcomes the technical defects of unreasonable compatibility, slow crosslinking speed and the like in the prior art. The EVA solar cell adhesive film comprises the following matters in parts by weight: 100 parts of ethylene-vinyl acetate, 0.5-3 parts of silane coupling agent, 1-3 parts of peroxide cross-linking agent, 0.1-0.5 part of anti-oxidant, 0.1-0.5 part of heat stabilizer and 0.05-0.2 part of hindered amine light stabilizer, wherein the peroxide cross-linking agent comprises peroxide-2-ethyl hexanoic acid tert-butyl crosslinker. Compared with the prior art, the fast cure EVA solar cell adhesive film has the advantages that the temperature for lamination is lower, the lamination time is shortened and the crosslinking degree is not lowered; and fast curing can be realized, the production efficiency is effectively improved and the production cost is reduced.