19 results about "Heptyl alcohol" patented technology

The invention relates to a method for separating azeotrope of 1-fluoro-1, 1-dichloroethane and 1, 1, 1, 3, 3-pentafluorobutane through extractive distillation. According to the method for separating the 1-fluoro-1, 1-dichloroethane and the 1, 1, 1, 3, 3-pentafluorobutane azeotrope through extractive distillation, an extracting agent is added into the 1-fluoro-1, 1-dichloroethane and the 1, 1, 1, 3, 3-pentafluorobutane azeotrope, and the extracting agent is one or more of n-amyl alcohol and n-heptanol. The method adopts intermittent extractive distillation or continuous extractive distillation operation, and has the advantages of simple and efficient separation process, high product purity and the like. The loss rate of the extracting agent is low, the extracting agent can be recycled, and environmental pollution can be avoided.

This invention provides a phosphorus-free, multifunctional, environmentally friendly scouring agent, its preparation method, and its application, belonging to the field of textile printing and dyeing technology. The surfactants used in this invention (including 2-ethylhexanol alkyl glycoside, 2-propylheptanol alkyl glycoside, 2-propylheptanol xyloside, and isomeric tridecyl alcohol ether carboxylic acid) are all nonionic surfactants. The resulting phosphorus-free, multifunctional, environmentally friendly scouring agent is easily soluble in water, acid-resistant, resistant to high-concentration strong alkalis, hard water-resistant, low-foaming, and has strong penetrating power. It is widely applicable to cotton and its blended textile processes, achieving excellent whiteness and wicking effect in conventional annealing / scouring / bleaching processes. It contains no alkylphenol polyoxyethylene ethers or organophosphates, causing no environmental pollution and simplifying and making textile pretreatment processes more environmentally friendly.

The invention belongs to the field of heterogeneous catalysis organic synthesis, and discloses a method for preparing internal olefin by catalyzing dehydration isomerization of straight-chain fatty alcohol, which comprises the following steps: respectively adding straight-chain fatty alcohol (such as n-heptanol) and an H-type MOR zeolite catalyst into a reaction tube, adding a solvent, and reacting at 130-150 DEG C for 6-24 hours. And after the reaction is finished, centrifuging the reaction liquid, collecting the supernatant liquid, carrying out vacuum concentration treatment, and carrying out column chromatography separation and purification on the obtained crude product to finally obtain the internal olefins (2-heptene and 3-heptene). The catalyst provided by the invention realizes cascade reaction of dehydration isomerization of alcohol with a relatively long carbon chain structure, can directly prepare corresponding internal olefin by a one-step method, avoids the use of noble metals, complex ligands and liquid acid-base, is simple, convenient, efficient and environment-friendly in operation flow, and is easy to separate from the product and convenient to recycle.

The present application relates to the technical field of chemical essence and flavor, and particularly relates to a decenoic acid ester compound, a preparation method and application thereof, and comprises the following steps: (1) preparing 2-(4-methyl-benzylidene) heptanal: under the condition of an inorganic alkaline reagent, p-methylbenzaldehyde and n-heptanal are subjected to aldol condensation reaction to synthesize 2-(4-methyl-benzylidene) heptanal; (2) preparing 2-(4-methyl-benzylidene) heptyl alcohol: under the condition of a reducing agent, 2-(4-methyl-benzylidene) heptanal is reduced to 2-(4-methyl-benzylidene) heptyl alcohol; (3) preparing 5-decenoic acid 2-(4-methyl-benzylidene) heptyl alcohol ester: under the catalysis of an acid, 5-decenoic acid and 2-(4-methyl-benzylidene) heptyl alcohol are subjected to esterification to synthesize 5-decenoic acid 2-(4-methyl-benzylidene) heptyl alcohol ester. The compound in the present application has jasmine aroma and milk aroma, has elegant aroma, has long-lasting aroma, and has important use in the field of daily chemical flavoring.

The invention relates to the technical field of synthesis of plasticizers for polyvinyl chloride resin, and discloses azelaic acid di (2-propyl heptyl) ester and a preparation method and application thereof, and the preparation method comprises the following preparation steps: putting azelaic acid, 2-propyl heptanol, a 2-propyl heptanol derivative and deionized water into a reaction kettle, and uniformly mixing to obtain a mixture a; raising the temperature of the mixture a, keeping the temperature, continuously raising the temperature, adding a catalyst, raising the temperature again, carrying out esterification reaction, terminating the reaction, filtering and collecting the catalyst to obtain a mixture b; the preparation method comprises the following steps: mixing a mixture A and a mixture B, cooling the mixture B, adding caustic soda liquid into the mixture B, carrying out water washing neutralization, stirring, standing for layering, discharging water to collect a product, and carrying out vacuum evaporation dehydration on the product to obtain the di (2-propylheptyl) azelate as the plasticizer of the PVC material, so that the mechanical properties of the PVC material can be improved, and the di (2-propylheptyl) azelate is not easy to migrate and volatilize.

The present invention belongs to the field of biotechnology, and particularly relates to Enterococcus italicus for producing fatty alcohols and its applications. Aiming at the problems existing in the production of fatty alcohols by existing microorganisms through fermentation, such as low yield, slow strain improvement, cumbersome detection process, physiological toxicity, and unreasonable selection of metabolic pathways, the present invention provides a strain of Enterococcus italicus for producing fatty alcohols, with the preservation number of CGMCC NO.25136. This strain can simultaneously produce n-heptanol, 1-dodecanol, 1-pentadecanol, 1-hexadecanol, and 1-nonadecanol, providing a strain selection for the preparation of fatty alcohols by microorganisms, and facilitating the research on the synthesis pathway of higher fatty alcohols to improve the ability of engineered bacteria to synthesize fatty alcohols.

The application discloses a Pediococcus pentosaceus strain derived from high-temperature Daqu and application thereof, the strain is named Pediococcus pentosaceus zqw75, and the preservation number is CGMCC NO.25146.The strain can produce aroma substances such as lauryl acetate, n-heptanol, butyl dodecalactone, benzene acetaldehyde, methyl heptenone and pyrazine, and when the strain is used in combination with commercial sweet wine starter, the relative content of phenylethanol is increased from 8.562% to 10.455%, the relative content of ethyl butyrate is increased from 0.460% to 1.473%, the relative content of ethyl octanoate is increased from 0.754% to 1.672%, the relative content of ethyl n-hexanoate is increased from 0.832% to 3.446%, and the relative content of isoamyl acetate is increased from 0.832% to 2.155%; and the strain can produce aroma substances that are not produced by the commercial sweet wine starter, such as hexanoic acid, butyric acid, octanoic acid, ethyl hexanoate and lauryl acetate.The strain can be applied in the field of liquor making, including pit mud making and liquor flavor substance improvement, and has great industrial application value.

DEPCT64 This invention provides a plasticizing agent for vinyl chloride resin that is capable of being used. It is compatible with vinyl chloride resin, and furthermore, it may be used to prepare mixtures of vinyl chloride. Resins that can be molded into objects with excellent cold and heat resistance. This invention concerns a plasticizing agent for vinyl chloride resin, consisting of A1) and Ester compounds produced by the reaction of a1) at least one compound selected from the group which It consists of divalent to tetravalent aromatic carboxylic acids, and alkyl esters. Its anhydride, with a2) of a mixture of alcohols containing 2-propylheptanol, n-decanol, and n-dodecarnol -----------------------------------------------------------

The invention relates to di (2-propylheptyl) sebacate as well as a preparation method and application thereof, and relates to the technical field of plasticizers. Aiming at the environment-friendly defect of the traditional plasticizer, the performance limitation of the existing sebacate and the technical bottleneck of branched alcohol modification in the prior art, the invention provides a novel preparation process. According to the method, sebacic acid and 2-propyl heptanol are used as raw materials, and the plasticizer with excellent performance is prepared through specific esterification reaction conditions including the steps of staged heating, catalyst adding, vacuum dehydration and the like. The product has the characteristics of low acid value, low alcohol content, high cold resistance, low mobility and the like, is suitable for polyvinyl chloride products, and particularly has excellent performance in cold-resistant scenes. Compared with the traditional method, the preparation process provided by the invention avoids the problems of equipment corrosion and environmental pollution caused by concentrated sulfuric acid catalysis, improves the reaction efficiency and the product yield, and realizes green and efficient industrial production.

The application provides a non-ionic surfactant, a preparation method and application thereof, and the non-ionic surfactant has a structure shown in the following formula: wherein m is 3-15. The non-ionic surfactant provided by the application is modified double-end hydroxyl 2-propyl heptyl alcohol polyoxyethylene ether, so that the non-ionic surfactant has excellent alkali resistance, emulsification and metal cleaning performance.

The application discloses a strain of Scheffersomyces fibuliger and a microbial agent and application thereof, and belongs to the field of biology.The Scheffersomyces fibuliger (Scheffersomyces fibuliger) Cyberlindnera fabianii ) LZLJ1-6 has a preservation number of CCTCC NO: M 2025590. Pure-strain fermentation of the strain can metabolically produce a plurality of flavor substances such as secondary octanone, nonanal and heptyl alcohol. Application of a microbial agent containing the strain to rice wine fermentation can significantly increase the richness of flavor substances in the rice wine, including a plurality of alcohol, ester, ketone, acid and phenolic compounds, and meanwhile, the content of some original flavor substances is increased. The strain provided by the application has characteristics in flavor metabolism, is particularly outstanding in synthesis of characteristic aroma components such as secondary octanone, and has important significance for enriching flavor levels and improving aroma complexity in wine production, especially rice wine fermentation, and also provides high-quality strain resources for development of new fermented foods.

The invention relates to a synthetic method of sec-heptyl xanthate. The synthetic method comprises the following steps: the xanthate is synthesized by directly reacting sec-heptanol, carbon disulfide and sodium hydroxide or potassium hydroxide according to a molar ratio of 0.98: 1.02: 1.05; the preparation method comprises the following steps: adding sec-heptanol and carbon disulfide into a reactor, uniformly stirring, adding powdered alkali in batches while stirring, controlling the reaction temperature at 20 + / -1 DEG C, adding the rest powdered alkali at one time, continuously stirring, keeping the temperature at 36-38 DEG C, continuously keeping the temperature for 30-40 minutes, cooling after the temperature is kept, and discharging after the temperature is reduced to 25 DEG C or below, thereby obtaining the product. According to the synthetic method of the sec-heptyl xanthate, the sec-heptyl xanthate meeting the industrial application requirement can be synthesized, the sec-heptyl xanthate is widely applied to mineral separation of non-ferrous metals such as copper, lead and zinc and precious metal minerals such as gold and silver, and due to the selectivity and collecting capacity different from those of other xanthate, an optional reagent can be newly added for the mineral separation process; and optimization of beneficiation process indexes and economic indexes is promoted.

A plasticizer and a method for manufacturing the plasticizer are provided. The method includes steps as follow. A dicarboxylic acid, a diol, and a catalyst are mixed to form a reactant mixture. The reactant mixture is reacted at a temperature ranging from 130° C. to 220° C. to form a semi-product. An endcapping alcohol into the semi-product at a temperature ranging from 205° C. to 220° C. to form a coarse plasticizer. The coarse plasticizer is purified under a pressure ranging from 760 Torr to 5 Torr to obtain the plasticizer. The dicarboxylic acid includes a first dicarboxylic acid and a second dicarboxylic acid, and the second dicarboxylic acid is adipic acid. The diol includes diethylene glycol and 2-methyl-1, 3-propanediol. The endcapping alcohol includes isooctyl alcohol, isodecyl alcohol, or 2-propylheptanol. A molar ratio of dicarboxylic acid:diol:the endcapping alcohol ranges from 1:0.6 to 0.9:0.3 to 0.6.

The invention discloses petroleum sulfonate capable of inhibiting coking and a preparation method thereof, and the method comprises the following steps: preparation of a sulfonation raw material: the sulfonation raw material comprises the following components in percentage by mass: 95.0%-99.6% of raw oil and 0.4%-5.0% of a coking inhibitor; the aromatic hydrocarbon content of the raw oil is greater than 35%; the coking inhibitor is selected from two or more of cresol, ethylene glycol dimethyl ether, n-heptanol, n-octyl alcohol, n-nonyl alcohol, benzyl alcohol or phenethyl alcohol; according to the method, a certain amount of coking inhibitor is added into the sulfonation raw material, so that the coking phenomenon generated in the reaction process can be effectively relieved, the operation period of a sulfonation reactor is prolonged, the switching influence of the sulfonation reactor is reduced, and the production cost is reduced; besides, the used sulfonation raw material is high in aromatic hydrocarbon content, the active matter content of the product can reach 40% or above, and the unsulfonated oil content can reach 35% or below, so that the active matter content and the product performance of the mahogany petroleum sulfonate product are effectively improved.

Lubricant grease composition, comprising: (a) a base oil; and (b) a thickener wherein the base oil (a) comprises two or more types of synthetic oils, at least one of which (c) is a low-viscosity ester-based synthetic oil with a kinetic viscosity at 40 °C of 5 to 15 mm 2 / s is a kinematic viscosity at 40 °C of the base oil (a) 25 mm 2 / s or less, and the thickener is lithium soap or lithium complex soap, wherein the low viscosity synthetic ester-based oil (c) comprises at least one selected from the group consisting of (d) a synthetic ester-based oil which is an esterified product of a mixture of 2-hexyldecyl alcohol, 2-octyldecyl alcohol, 2-hexyldodecyl alcohol and 2-octyldodecyl alcohol and capric acid, (e) a synthetic ester-based oil which is an esterified product of 2,4-diethyl-1,5-pentanediol and caprylic acid, and (f) a synthetic ester-based oil which is an ester oil consisting mainly of an esterified product of 2-propylheptanol and adipic acid.

The present invention relates to the field of nanomaterials, and in particular to a preparation method and application of mesoporous SiO2 nanoparticles with adjustable concavo-convex curvature. The preparation method comprises the steps of: mixing and stirring hexadecyltrimethylammonium bromide, polyvinyl pyrrolidone, ethanol, water, sodium citrate solution, ammonia water and alcohol oil phase solvent to obtain a first emulsion; adding a silicon source to the first emulsion, and standing to react to obtain mesoporous SiO2 nanoparticles; wherein mesoporous SiO2 nanoparticles with target concavo-convex curvature are prepared by using alcohol oil phase solvents with different alkane chain lengths; when the alcohol oil phase solvent is n-propanol, n-butanol, n-pentanol, n-hexanol or n-heptanol, the concavo-convex curvature of the mesoporous SiO2 nanoparticles is 1 / 2 to 9 / 8. The preparation method is simple to operate and has high efficiency, especially by using alcohol oil phase solutions with different alkane chain lengths, the concavo-convex curvature of the mesoporous SiO2 nanoparticles can be precisely and regularly controlled.

The application provides a Leuconostoc mesenteroides, which is Leuconostoc mesenteroides zqw123 preserved in the China General Microbiological Culture Collection Center, and has a preservation number of CGMCC No.25154. The Leuconostoc mesenteroides has the capability of simultaneously producing organic acids such as acetic acid, isovaleric acid, hexanoic acid, iso-octanoic acid, octanoic acid, nonanoic acid and n-decanoic acid, organic alcohols such as n-heptanol and 1-nonanol, and aldehyde ketone compounds such as phenylacetaldehyde, 2,3-dihydro-2,2,6-trimethylbenzaldehyde, sec-octanone and geranylacetone, and can provide rich flavoring substances for liquor brewing, and has a good application prospect.

A plasticizer and a method for manufacturing the plasticizer are provided. The method for manufacturing the plasticizer includes steps as follows: mixing a dicarboxylic acid, a diol, and a catalyst to form a reactant mixture; reacting the reactant mixture at a temperature ranging from 130° C. to 220° C. so as to form a semi-product; adding an endcapping alcohol into the semi-product at a temperature ranging from 205° C. to 220° C. so as to form a coarse plasticizer; purifying the coarse plasticizer under a pressure ranging from 760 Torr to 5 Torr so as to obtain the plasticizer. The dicarboxylic acid includes adipic acid. The diol includes a polyglycol and a saturated fatty alcohol. The endcapping alcohol includes isooctyl alcohol, isodecyl alcohol, or 2-propylheptanol. The dicarboxylic acid, the diol, and the endcapping alcohol have a molar ratio ranging from 1:0.6 to 0.9:0.3 to 0.6.