72 results about "Heptanoic acid" patented technology

A highly efficient method for extracting tea saponin from camellia oleifera seed meal is characterized by comprising the following steps: (1) mixing fatty acid A, fatty acid B, sodium hydroxide, and water to prepare an extractant, wherein fatty acid A is at least one of hexanoic acid, heptanoic acid, octanoic acid, or nonanoic acid, and fatty acid B is decanoic acid; (2) mixing the camellia oleifera seed meal with the extractant prepared in step (1) to extract tea saponin; and (3) after the extraction is completed, adding hydrochloric acid, centrifuging and separating the layers, and collecting the extract at the lower layer. The technical solution provided by the present invention has the following advantages: a high tea saponin extraction rate; the extractant does not contain volatile organic solvents and is easily recyclable and environmentally friendly; the extractant has good reusability and low extraction cost.

The invention belongs to the technical field of fine chemical engineering, and relates to a method for preparing high-purity n-heptanoic acid and n-nonanoic acid based on temperature control phase transfer catalysis and green oxidation. The method comprises the following steps: adding dehydrated 1-hexene or 1-octene, a PETPP / Rh catalyst, toluene / water and PEG-400, introducing a CO / H2 mixed gas to 4.5-5.0 MPa, carrying out a reaction, carrying out phase splitting, and carrying out molecular distillation on an organic phase to obtain an n-heptanal crude product or an n-nonanal crude product; and carrying out electrolysis in an electrolyte containing MnSO4, AgNO3 and H2SO4, and purifying the reaction solution to obtain n-heptanoic acid or n-nonanoic acid. No heavy metal pollution is generated in the reaction process, the concentration of manganese ions in the wastewater is lower than 0.05 ppm, and the COD value is 30 mg / L or below. The activity of the catalyst is kept above 90% after the catalyst is cyclically used for more than 20 times, the electrolyte can be repeatedly used for more than 50 times, and the recycling rate of the by-product hydrogen exceeds 85%.

The invention provides an organic solderability preservative and a preparation method for forming a protective film on the surface of copper, the organic solderability preservative comprises the following components in parts by weight: 3.0-4.5 parts of 2-(3, 4-dichlorobenzyl) benzimidazole, 52.5 parts of acetic acid, 0.75 part of n-heptanoic acid, 0.25-0.5 part of zinc acetate, 0.25-0.5 part of copper sulfate, 0.2 part of citric acid modified nano cerium oxide, and the balance of deionized water and a pH regulator; the preparation method for forming the protective film on the copper surface comprises the following steps: oil removal treatment: treating a circuit board in a sodium hydroxide solution; pickling treatment: treating in a sulfuric acid solution; micro-etching treatment: treating in a solution of sodium persulfate and sulfuric acid; pickling treatment: treating in a sulfuric acid solution; film forming treatment: dipping in an organic solderability preservative at 45 DEG C;

The invention relates to a method for synthesizing (R)-3-methylheptanoic acid. According to the method, the application range of steroid sapogenin degradation waste is further expanded. According to the method disclosed by the invention, the (R)-3-methyl-heptanoic acid can be conveniently obtained by taking the (R)-4-methyl-gamma-butyric acid lactone obtained by degrading steroid sapogenin as a raw material. According to the method provided by the invention, the use of highly toxic and controlled reagents is avoided, high-risk reactions such as hydrogenation in the prior art are avoided, and the method is mild in reaction condition and low in synthesis cost. Meanwhile, the utilization rate of steroid sapogenin resources is increased, and waste generated in the utilization process of the steroid sapogenin resources is reduced.

The invention discloses a method for removing the fishy smell of chicken gizzards through multi-bacterium combined fermentation, and belongs to the technical field of poultry byproduct processing. According to the method disclosed by the invention, the chicken gizzards are subjected to fishy smell removal treatment by compounding the saccharomycetes Y4-1 and the bacillus SB. After fishy smell removal treatment, the content of key fishy smell substances including 1-octylene-3-alcohol, octanol, hexanal, nonanal and heptanal is greatly reduced, the total content is reduced from 25.15 mu g / g to 6.02 mu g / g and is reduced by 76.06%, heptanol, geranyl acetone, methyl heptanoate, methyl caprylate, glycerol monooleate, trans-2-decenal, 2-undecenal and other substances are completely removed, and the content of the key fishy smell substances is reduced by 76.06%. Meanwhile, elegant aroma components such as benzaldehyde and phenylacetaldehyde are generated. In conclusion, the saccharomycetes Y4-1 and the bacillus SB are compounded to remove fishy smell, so that the fishy smell substances of the chicken gizzards can be effectively removed, the flavor of the chicken gizzards can be further improved, and the edible value of the chicken gizzards is improved.

The invention discloses a method for preparing omega-aminocarboxylic acid through alkaline ring-opening reaction of cyclic lactam, which comprises the following steps: adding common inorganic alkali and a proper amount of distilled water into a reaction kettle, and stirring until the common inorganic alkali is completely dissolved to obtain a solution; then adding a certain amount of cyclic lactam, and gradually heating to reflux reaction; after the reaction is completed, cooling a solution system to room temperature, dropwise adding hydrochloric acid to adjust the pH value to 7.0, and removing water to obtain a crude product of omega-aminocarboxylic acid; and adding a crystallizing agent A and a crystallizing agent B into the crude product for recrystallization, stirring for 2 hours under a low-temperature condition to obtain a large amount of white precipitate, filtering, and drying to obtain a white solid product aminoheptanoic acid. The method is simple and convenient in process operation, good in reproducibility, high in total yield, low in product metal impurity content, economical and environment-friendly, and suitable for batch industrial production.

The invention discloses a nitrilase mutant and an application of the nitrilase mutant in preparation of (S)-3-methylheptanoic acid. The nitrilase mutant disclosed by the invention has high catalytic activity and stereoselectivity, and can overcome the defects of low substrate concentration, low stereoselectivity, high cost, environmental pollution and the like in the existing method, so that 3-methylheptonitrile can be quickly catalyzed to generate (S)-3-methylheptanoic acid under high substrate concentration. In addition, the method also has the effects of good enzyme catalysis effect, high product purity, high recovery rate, simple steps, greenness, environmental protection and the like.

The invention discloses n-heptanoic acid prepared by oxidizing alcohol and a preparation method of the n-heptanoic acid, sec-octanol is taken as a raw material, a copper oxide-zinc oxide supported catalyst is added into a caustic alkali aqueous solution, reaction is carried out under the conditions that the temperature is 160-240 DEG C and the pressure is 1.0-2 MPa to obtain n-heptanoate, and then the n-heptanoic acid is obtained through acidification. The catalyst is added to promote the dehydrogenation reaction of the octanol and accelerate the reaction rate, so that the problem that the reaction is slow when the reaction temperature is lower than 320 DEG C is solved, by controlling the addition amount of water and the reaction pressure, generation of a 2-methyl-2-octene byproduct caused by dehydration of a system can be prevented, and by adding the defoaming agent, the yield of the 2-methyl-2-octene is increased. The problem of mass transfer difficulty caused by a large amount of foam in the later reaction stage is solved. According to the method disclosed by the invention, the yield of the n-heptanoic acid is more than 70% at 160-240 DEG C, and the method does not need to depend on a large amount of potassium hydroxide and has remarkable industrial advantages.

This invention discloses a method for preparing capsaicin-like substances by temperature-responsive eutectic solvent extraction, comprising the following steps: drying Yunnan chili peppers (after removing stems and seeds), pulverizing, sieving, and collecting the chili powder; mixing lidocaine (HBA) with six alkane-chain carboxylic acids (valerate, hexanoic acid, heptanoic acid, octanoic acid, nonanoic acid, and lauric acid) at a 1:1 molar ratio to form a homogeneous and transparent liquid, TRDES; weighing the chili powder, adding it to the TRDES aqueous solution, and extracting by shaking; after extraction, centrifuging, and diluting the supernatant to obtain capsaicin-like substances. This invention uses temperature-responsive eutectic solvent extraction to prepare capsaicin-like substances, which is simple, highly efficient, and allows for the recycling of extraction reagents, effectively saving resources. It has significant practical and industrial value for promoting the large-scale production of capsaicin-like substances and enhancing their high-value applications.

The invention relates to a biodegradable hollow plate master batch and a preparation process thereof. The biodegradable hollow plate master batch is prepared from the following raw materials in parts by weight: 30-50 parts of a first monomer; 5-30 parts of a second monomer; 3-20 parts of a third monomer; 2 to 12 parts of biomass filler; the first monomer is one of a cyclohexane dibasic alcohol compound, a polyester copolymer, organic acid esters, aromatic polyester and the like, and the second monomer is one of a dicarboxylic acid compound, succinic acid and the like; the dicarboxylic acid compound comprises adipic acid and pimelic acid. According to the invention, a first monomer is a cyclohexanediyl alcohol compound, the cyclohexanediyl alcohol compound is 1, 4-cyclohexanedimethanol, and a second monomer is succinic acid; the third monomer is polyethylene glycol terephthalate and has the characteristics of transparency, toughness, chemical corrosion resistance and the like, the mechanical property, the degradation property and the environmental friendliness of the material are practically balanced, and a material-level solution is provided for sustainable development.

To provide a beer-flavored beverage that offers excellent cooling sensation despite having a low alcohol content. [Solution] A beer-flavored beverage having an alcohol content of less than 5 v / v% and a heptyl acetate content of 0.6 μg / L or more.

The application discloses a compound, 4-methyl-5-thiazole ethyl mercaptide heptanoate, and a specific chemical structural formula is shown in the following formula: the aromatic compound is mainly applied to food essence.

The present application provides a kind of sorbitan ester antiseptic additive-free replacement sorbitan monoisopropyl adipate and its synthesis method, with sorbitol, 2-propyl heptanoic acid as raw material, by one-step reaction to obtain the target product sorbitan monoisopropyl adipate. By characterizing its sterilization, washing and emulsification, etc. The results show that the preservative and bacteriostatic performance of sorbitan monoisopropyl adipate reaches and is better than the level of currently marketed sorbitan ester, can replace sorbitan ester, and has good emulsification, washing function. The synthesized sorbitan monoisopropyl adipate is used in detergent, can replace part of traditional surfactant, through decontamination power evaluation and microbial test, the washing effect is good, the detergent after replacement does not need to add conventional preservative, can pass microbial challenge test.

The invention discloses a performance regulation and control method and application of high-stability and low-gas-production vegetable insulating oil, and the regulation and control method comprises the following steps: S1, mixing trimethylolpropane with potassium hydroxide, and heating to melt and flow to obtain a reaction mixture; s2, adding n-nonanoic acid into the reaction mixture, and heating for transesterification; s3, washing, oscillating, standing, separating liquid, and taking an upper-layer oil sample; s4, adding tridecafluoroheptanoic acid, xylene and p-toluenesulfonic acid, and heating to carry out esterification water-carrying reaction; s5, adding a molecular sieve, alkaline Al2O3, activated clay and a silica gel adsorbent, and dehydrating and drying; s6, impurities are removed, and a TMPN sample is obtained; s7, the TMPN sample and natural ester insulating oil are stirred according to the mass fraction proportion, the TMPN-NE insulating oil is obtained, the stray gas content is low, the high-temperature oxidation resistance is excellent, and the TMPN-NE insulating oil can be used in the transformer electricity-heat-flow coupling high-temperature working condition environment for a long time.

The application relates to the technical field of safety hooks, and particularly discloses an insulating safety hook, a preparation method of the insulating safety hook and an insulating material. The insulating safety hook comprises a base material, an insulating layer and an outer layer which are sequentially arranged from inside to outside; and the preparation raw materials of the insulating layer comprise the following components in parts by weight: polybutylene terephthalate 19-26 parts; polyethylene terephthalate 17-23 parts; epoxy resin 22-28 parts; phenolic resin 16-27 parts; ceramic fiber 12-16 parts; nano-particles 6-13 parts; quartz powder 14-19 parts; flame retardant 7-11 parts; nylon 19-28 parts; solvent 23-44 parts; curing agent 10-13 parts; and chitosan-stearic alcohol heptanoate microcapsules 0-10 parts. The insulating safety hook is coated with the insulating layer on the surface of the metal base material, the metal base material guarantees the high strength of the safety hook, and the insulating layer endows the safety hook with the insulation and flame retardant properties, and the safety hook can be used in a live environment.

The invention relates to a preparation method of 7-methoxynaphthalene acetonitrile. The preparation method comprises the following steps: reacting 7-methoxy-1-tetralone with copper bromide under the action of a catalyst to generate 7-methoxy-2-bromo-1,2,3,4-tetralone; reacting 7-methoxy-2-bromo-1,2,3,4-tetralone under the catalysis of a heteropoly acid to obtain 7-methoxy-1,4-dihydronaphthalone; and directly condensing 7-methoxy-1,4-dihydronaphthalone with cyanoacetic acid in the presence of benzylamine and heptanoic acid to obtain 7-methoxynaphthalene acetonitrile. The preparation method of the catalyst comprises the following steps: mixing carrier particles and a metal salt solution, adjusting the pH to alkaline, washing, drying, immersing in a sulfuric acid solution, filtering, and then roasting to obtain the catalyst. The carrier particles are aluminum oxide or silicon dioxide, and the metal salt solution is a salt solution of Zr, Ti or Sn. The method reduces the difficulty of purification, improves the yield and purity, and reduces the cost.

The invention discloses an extraction agent as well as a preparation method and application thereof. The extraction agent comprises a phosphorus or phosphine compound extraction agent and an extraction inhibitor, the extraction inhibitor is a weak acid compound selected from nonyl phenol, octyl phenol, 3, 5-di-tert-butyl catechol, 4-tert-butyl catechol, 4-butyl catechol, capryloyl salicylic acid, azelaic acid, sebacic acid, dodecanedioic acid, 2-hexyldecanoic acid, lauric acid, decanoic acid, 2, 2 '-(1, 4-phenylene bis (oxy)) dibutyric acid, 2, 2'-(1, 4-phenylene bis (oxy)) divaleric acid, 2, 2 '-(1, 4-phenylene bis (oxy)) divaleric acid, 2, 2'-(1, 4-phenylene bis (oxy)) dibutyric acid, 2, 2 '-(1, 4-phenylene bis (oxy)) dibutyric acid, 2, 2'-( the organic solvent is at least one of 2, 2 '-(1, 4-phenylene bis (oxy)) dihexanoic acid, neodecanoic acid, 2, 2'-(1, 4-phenylene bis (oxy)) diheptanoic acid or 2, 2 '-(1, 4-phenylene bis (oxy)) dioctanoic acid. The extraction agent provided by the invention can effectively prevent an extraction system from generating emulsification or three phases, and can effectively improve the reverse extraction efficiency. In addition, the extraction agent can be designed and adjusted, the composition of the extraction agent can be adjusted according to the composition, element concentration and the like of the solution, and then efficient separation of metal elements is achieved.

The invention discloses pericarpium citri reticulatae essence and a preparation method thereof. The essence comprises a citrus aroma main body, a terpene auxiliary agent, a medicinal aroma modifier, a flavor regulator, ethanol and the balance of a solvent, wherein the citrus fruity flavor main body comprises sweet orange oil, 5-fold sweet orange oil, lemon oil and white lemon oil, the medicinal stale flavor modifier comprises anise oil, terpilenol and beta-ionone, and ethyl enanthate, acetic acid, hexanoic acid or noottanone can be selectively added as a flavor enhancer. According to the essence, through the synergistic effect of all functional components, the compound fragrance of fresh fruit fragrance, mellow medicine fragrance and deep charring of Xinhui pericarpium citri reticulatae is precisely restored, and bad tastes such as rancidity, fuel consumption and scorched bitter taste generated by oxidation or coking of roasted nuts can be effectively covered. The preparation method comprises the steps of raw material pretreatment, step-by-step mixing and temperature-controlled aging, and the product is good in stability and suitable for high-temperature processing of nut products such as melon seeds, peanuts and cashew nuts.

The present invention includes solid compositions of triglycerides with one or more fatty acids, such as triheptanoin and glycerol phenylbutyrate, and therapeutic use thereof. The solid compositions can be prepared by spray-drying or other processes.

The invention provides a one-pot preparation method of a bepedioic acid intermediate, which comprises the following steps: S1, taking DMSO (dimethylsulfoxide) as a reaction solvent, adding 7-bromo-2, 2-dimethyl ethyl heptanoate and p-methylbenzenesulfonyl methyl isocyanide, and carrying out addition reaction under the catalysis of alkali; s2, water is added for quenching excessive alkali, and then an organic solvent is added for extraction; s3, dropwise adding concentrated hydrochloric acid to carry out an acid hydrolysis reaction; s4, washing; s5, carrying out vacuum concentration on the organic phase, and carrying out ester hydrolysis reaction by taking an alkali metal compound as a catalyst; s6, adding water and dichloromethane for extraction, collecting a water layer, dropwise adding concentrated hydrochloric acid, crystallizing, filtering and drying to obtain a product. The target product is directly obtained through condensation, acid hydrolysis, ester hydrolysis and other basic chemical reactions through a one-pot method, the process is simple, operation is convenient, the reaction efficiency is improved, and the usage amount of solvents and reagents is reduced; and the method is energy-saving and environment-friendly, can further reduce environmental pollution, and has a good industrial application prospect.

The invention discloses a method and system for preparing n-heptanoic acid through hydrolysis of methyl n-heptanoate based on a reactive distillation technology, and belongs to the technical field of organic synthesis. The method comprises the following steps: continuously introducing methyl n-heptanoate and water into a reactive distillation tower filled with an H beta molecular sieve-sulfonated carbon-based composite solid acid catalyst, carrying out hydrolysis reaction at a reaction section temperature, and forming an incremental temperature gradient along the height direction of the reactive distillation tower to generate a reaction mixture containing n-heptanoic acid and methanol; the reaction mixture is subjected to rectification separation, and an n-heptanoic acid product is extracted from a tower kettle of the reactive distillation tower. The target product is high in selectivity, high in yield and high in purity (n-heptanoic acid with the purity larger than or equal to 99.5% can be obtained in a tower kettle); the catalyst is efficient and easy to separate and recover; the method is environment-friendly and less in'three wastes' emission, and accords with the green chemistry principle; the whole production cost is competitive, and industrial production is easy to realize.

The invention discloses a synthesis method of neopentyl glycol diheptanoate, and belongs to the technical field of organic synthesis, the key point of the technical scheme is that the synthesis method of neopentyl glycol diheptanoate comprises the following synthesis steps: S1, stirring and mixing neopentyl glycol, n-heptanoic acid and an inorganic tin catalyst, and starting to heat; s2, the reaction is divided into two stages, the reaction temperature of the first stage is 130-150 DEG C, the reaction lasts for 3-5 h, the reaction temperature of the second stage is 160-200 DEG C, the reaction vacuum degree is 0.04-0.1 MPa, and the heat preservation reaction lasts for 4-10 h; s3, starting a vacuum pump, deacidifying under reduced pressure when the vacuum degree gradually reaches 2Pa, adding a decolorizing agent after the acid content and the moisture content reach the standard, stirring for 30-60 minutes under reduced pressure at 110-120 DEG C, filtering to obtain a crude product, performing alkali washing and water washing on the crude product, and performing high-temperature vacuum drying to obtain neopentyl glycol diheptanoate. And the production cost is reduced.

The invention relates to a lubricant composition for use in fluid dynamic bearing systems, the base fluid of which is pentaerythritol tetraheptanoate, and its use.

Described herein is an invention that includes a spreadable conditioning composition comprising a blend of: a branched hydrocarbon and an ester having a kinematic viscosity of less than or equal to about 100 centistokes. The composition may be natural, for example, if each of the branched hydrocarbon and the ester are independently vegetable-derived. In addition, the composition may lack ingredients that are derived from a palm oil. In an embodiment, the composition is a blend of hydrogenated farnesene and an ester selected from glyceryl triheptanoate, heptyl undecylenate, and mixtures thereof. The composition exhibits an average spreading velocity of about 4 to about 8. Also disclosed are formulations for use in products of personal care, home / institutional care, industry, pharmaceutical and medical and veterinary care and related methods.

The present invention relates to, inter alia: a bean-odor-masking agent containing at least one of heptanoic acid, 2,4-decadienal, and 3-octen-2-one; and a bean-derived-food-containing composition containing at least one of heptanoic acid, 2,4-decadienal, and 3-octen-2-one.

The invention discloses a brown sugar and preserved plum essence composition special for areca nut products and a preparation method thereof, and the brown sugar and preserved plum essence composition is composed of 10-20 parts of brown sugar base, 8-15 parts of preserved plum base, 3-8 parts of sweetening agent, 2-5 parts of acidulant, 40-60 parts of edible alcohol and 1-3 parts of stabilizer. The brown sugar base is composed of caramel aldehyde, citronellal, maltol, ethyl maltol and edible salt according to the weight ratio of (1-3): (0.5-1.5): (0.3-1): (0.2-0.8): (0.1-0.5), and the preserved plum base is composed of phenylacetaldehyde, ionone, heptanoic acid, benzyl acetate and lactones according to the weight ratio of (1-3): (0.5-1.5): (0.5-1.5): (0.2-0.6): (0.1-0.5). The brown sugar preserved plum essence composition disclosed by the invention is excellent in aroma richness, aroma retention time, taste harmony and stability.

The invention discloses a fried bean sauce flavor essence and a preparation method and application thereof, and the fried bean sauce flavor essence is composed of the following components by weight: soybean salad oil, 2-methyltetrahydrofuran-3-mercaptan, 2-methyl-3-mercaptofuran, methyl cyclopentenolone, 2, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, 5-trimethyl-1, 3, the ointment is prepared from 2, 5-trimethylpyrazine, hexadecanoic acid, octadecanal, allyl disulfide, 2-acetylfuran, isoamyl acetate, soy ketones, anethole, sesame oil, ethyl maltol, ethyl enanthate, 4-ethyl guaiacol, furanone, glacial acetic acid and isovaleric acid. The fried bean sauce flavor essence disclosed by the invention has the characteristics of classic fried bean sauce flavor, strong sauce flavor and mellow meat flavor.

The invention relates to an application of 7-phenylcarbamoyl heptanoic acid in preparation of antitumor drugs, in particular to a new application of 7-phenylcarbamoyl heptanoic acid in preparation of antitumor drugs, which develops the medicinal value of 7-phenylcarbamoyl heptanoic acid and has high antitumor activity on solid tumors or hematologic tumors. In-vivo experiments show that under an effective dose, the 7-phenylcarbamoyl heptanoic acid does not cause obvious weight loss, weight change of main organs or histopathologic injury of experimental animals, so that the 7-phenylcarbamoyl heptanoic acid has a relatively good treatment window and good safety.

The invention belongs to the technical field of pentaerythritol fatty acid ester synthesis, and particularly relates to pentaerythritol mixed fatty acid ester as well as a preparation method and application thereof. The preparation method comprises the following steps: mixing pentaerythritol, fatty acid, a catalyst and a water-carrying agent, and carrying out esterification reaction to obtain esterification reaction liquid; carrying out purification treatment on the esterification reaction liquid to obtain pentaerythritol mixed fatty acid ester; the fatty acid comprises n-heptanoic acid, n-octanoic acid and 3, 5, 5-trimethyl hexanoic acid, and the molar ratio of the n-heptanoic acid to the n-octanoic acid to the 3, 5, 5-trimethyl hexanoic acid is (1-8): (1-8): 2. According to the invention, acid raw materials for esterification reaction are reasonably selected to react with pentaerythritol, and meanwhile, the molar ratio of three fatty acids is regulated and controlled, so that the obtained pentaerythritol mixed fatty acid ester has the characteristics of low viscosity and high ignition point, thereby having excellent low-temperature fluidity and high-temperature stability; meanwhile, the pentaerythritol mixed fatty acid ester provided by the invention also has excellent electrical performance.

The invention discloses basic fragrance smelling liquid of Luzhou-flavor liquor as well as a preparation method and application of the basic fragrance smelling liquid, and belongs to the field of food flavor and chemical engineering. The Luzhou-flavor liquor basic fragrance smelling liquid comprises the following components: a fragrance compound and a solvent, the aroma compound comprises an acid compound, an ester compound, acetal and furfural; wherein the acid compound is at least one of hexanoic acid, acetic acid, lactic acid and butyric acid; the ester compounds are at least two of ethyl hexanoate, ethyl laurate, ethyl acetate, ethyl lactate, ethyl butyrate and ethyl heptanoate; the solvent is at least one of ethanol, propylene glycol, glycerol, caprylic capric triglyceride and triethyl citrate. The aroma of the Luzhou-flavor liquor containing hundreds of volatile compounds is successfully simulated through an extremely simple formula, and the Luzhou-flavor liquor has important market value and scientific research value.