12 results about "N-Propyl alcohol" patented technology

The invention discloses saccharomyces cerevisiae XJ-YSSCE010-1 with high temperature resistance, high ethanol yield and low fusel oil yield and application of the saccharomyces cerevisiae XJ-YSSCE010-1, and belongs to the technical field of microbial fermentation. The saccharomyces cerevisiae XJ-YSSCE010-1 disclosed by the invention is separated and screened from Maotai-flavor liquor yeast, and is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.31174. The fusel oil comprises the following main components: n-propanol, isobutanol, isoamyl alcohol, phenethyl alcohol and the like, wherein isobutanol and isoamyl alcohol have the highest toxicity. The saccharomyces cerevisiae XJ-YSSCE010-1 disclosed by the invention shows the advantages of high yield of ethanol, low yield of fusel oil and no production of isobutanol and isoamyl alcohol in liquid fermentation and simulated high-temperature stacking fermentation experiments, and the saccharomyces cerevisiae XJ-YSSCE010-1 is applied to preparation of white spirit, so that the production efficiency of the white spirit is improved, and the quality of the white spirit is improved.

The invention relates to a method for separating an n-propyl formate-n-propyl alcohol-water mixture by liquid-liquid phase separation coupling extractive distillation, which comprises the following steps of: dividing a raw material into a water phase and an organic phase by using a phase splitter based on the heterogeneous characteristic of an azeotropic system, and carrying out four-tower operation on a rectifying tower (C1), a rectifying tower (C2), a rectifying tower (C3) and a rectifying tower (C4) to obtain an n-propyl formate-n-propyl alcohol-water mixture. The efficient separation of the n-propyl formate-n-propyl alcohol-water mixture is realized. After separation, the molar fraction of n-propyl formate is greater than 99.99%, the molar fraction of n-propyl alcohol is greater than 99.99%, and the molar fraction of water is greater than 99.99%. The method provided by the invention realizes high-efficiency and low-energy-consumption separation of the n-propyl formate-n-propanol-water azeotropic mixture, and has economic benefits and environmental friendliness.

The invention relates to a preparation method of a catalyst for preparing acetyl n-propanol through catalytic oxidation of 2-methyltetrahydrofuran, and belongs to the technical field of catalyst preparation. The preparation method specifically comprises the following steps: dissolving a vanadium-containing compound serving as a main component of the catalyst and oxalic acid serving as a pore-forming agent into deionized water; heating and hydrolyzing the solution to completely evaporate water to obtain a solid; and roasting the solid in an air atmosphere to obtain the catalyst. The prepared catalyst is a catalyst for catalyzing molecular oxygen to oxidize 2-methyltetrahydrofuran to prepare acetyl n-propanol, and a new route for preparing acetyl n-propanol is realized.

The present application relates to the field of liquor brewing, and particularly to a solid fermentation liquor brewing method for reducing the content of higher alcohols; the method constructs a mechanism for targeted inhibition of isobutanol, isoamyl alcohol and n-propyl alcohol and promotion of the generation of ethyl hexanoate; accurate quantification and comparison by gas chromatography-mass spectrometry show that the core of the method is to significantly reduce higher alcohols and improve key aroma substances; the method of the present application blocks the synthesis of higher alcohols without changing the proportion of traditional flavor substances of liquor, guarantees the liquor yield, reduces the nervous stimulation after drinking, and improves the metabolic clearance rate of ethanol in the body.

The invention relates to a vanadium-containing molecular sieve catalyst for preparing acetyl n-propanol through catalytic oxidation of 2-methyltetrahydrofuran and a preparation method, and belongs to the field of vanadium-containing molecular sieve catalysts for catalytic oxidation of 2-methyltetrahydrofuran. The preparation method specifically comprises the following steps: taking a silicon-aluminum-sodium microporous molecular sieve as a precursor, carrying out ion exchange by adopting an aqueous solution of a vanadium-containing compound, washing with water, drying, and roasting to prepare the vanadium-containing molecular sieve catalyst. The prepared catalyst is a catalyst for catalyzing molecular oxygen to oxidize 2-methyltetrahydrofuran to prepare acetyl n-propanol, and a new route for preparing acetyl n-propanol is realized.

The invention discloses a preparation method and application of hempseed (-)-epicatechin-3-O-gallate, and belongs to the technical field of biology. According to the preparation method disclosed by the invention, the non-ester catechin and the ester-rich catechin are separated by adopting the mixed solvents of the ethanol, the methanol and the isopropanol, so that the extraction rate of the (-)-epicatechin-3-O-gallate can be improved (97% or above). Meanwhile, recrystallization is carried out by adopting organic solvents of methanol, normal propyl alcohol and isopropyl alcohol after extraction, so that the purity of the hempseed (-)-epicatechin-3-O-gallate can be improved (98% or above). The extracted epicatechin-3-O-gallate (ECG) is a natural antioxidant, has good biological activity, and has a good treatment effect on prevention and treatment of the hyperuricemia nephropathy.

The invention belongs to the technical field of extraction and separation, and particularly relates to an extraction method and a detection method of volatile substances in honey. The extraction method comprises the following steps: mixing honey and a buffer solution to obtain a honey pretreatment solution; the honey pretreatment liquid is subjected to ultrasonic extraction by sequentially adopting a polar gradient deep eutectic solvent aqueous two-phase system (such as a deep eutectic solvent which is sequentially mixed with tert-butyl alcohol, isobutanol, n-butyl alcohol, n-propyl alcohol and isopropyl alcohol), and an obtained alcohol upper phase contains volatile substances. According to the method, the characteristics of active ingredients in the honey are combined, a polar gradient deep-eutectic solvent aqueous two-phase extraction system is constructed by utilizing the solvent polarity and similar dissolvability principle, simultaneous separation and enrichment of multiple types of active ingredients are realized, and the method is an efficient and green honey sample pretreatment method. According to the invention, a multi-stage gradient extraction technology is adopted, so that excellent extraction effect and sensitivity are shown; the invention provides a new solution for green extraction of natural products.

The utility model discloses energy-saving n-propyl acetate production equipment which comprises a main body, a stirring cavity is formed in the main body, a heating cavity is formed in the outer side of the stirring cavity, an electric heating plate is arranged in the heating cavity, and the energy-saving n-propyl acetate production equipment further comprises a first transmission cavity which is formed in the upper end of the interior of the main body; first rotating rods are rotationally arranged on the two sides of the upper end in the first transmission cavity, second transmission cavities are formed in the two sides of the lower end in the main body, one ends of the first rotating rods penetrate through the stirring cavity and extend into the second transmission cavities, and the first rotating rods are rotationally connected with the second transmission cavities. When the energy-saving n-propyl acetate production equipment is used for stirring and mixing, liquid can be circulated and exchanged in a wider area, the layering phenomenon in the liquid can be broken through multidirectional flow, and acetic acid and n-propyl alcohol molecules are ensured to be fully contacted and mixed in a shorter time, so that the mixing uniformity is improved.

A composition includes particular amounts of methyl formate and a second solvent selected from acetone, acetonitrile, cyclopentanone, dimethyl carbonate, dimethyl formamide, dimethyl sulfoxide, 1,3-dioxolane, ethylene glycol monomethyl ether, gamma butyrolactone, isopropyl alcohol, methyl acetate, methylal, methyl glyoxal, propionaldehyde, propionic acid, n-propyl alcohol, propylene carbonate, 2-pyrrolidone, tetrahydrofuran, thioacetic acid, thiophene, transdichloroethylene, water, or a combination thereof. The composition can be particularly useful in removing a coating from a surface.

This invention relates to catalysts, preparation methods, and applications for the one-pot catalytic oxidation of primary alcohols to esters using oxygen. The catalyst is a zinc-cobalt composite oxide, denoted as Zn-CoO, obtained by stepwise calcination of a Zn-doped modified ZIF-67 precursor. x The morphology is basically rhombic dodecahedral with a slightly concave surface, and the particle size is 0.8~1.2 μm. The primary alcohol as the reaction substrate is added to the reaction solvent, followed by the catalyst Zn-CoO. x The reaction involves the use of N-hydroxyphthalimide as a co-catalyst, with oxygen introduced into the solution during the reaction. The ester product is then separated after the reaction. This invention exhibits excellent catalytic performance for a variety of typical primary alcohols. The esterification yields are as follows: n-propanol oxidative esterification yield reaches 85.6%, n-butanol 97.0%, cyclohexylmethanol 89.9%, n-octanol 80.8%, and benzyl alcohol up to 96.0%. It demonstrates broad applicability and high selectivity for straight-chain aliphatic primary alcohols, cycloalkyl methanols, and aromatic primary alcohols.

The application discloses a catalyst for C2-C4 low-grade aliphatic amine and a preparation method and application thereof, and particularly relates to the technical field of catalysts. The catalyst comprises 8-18% of NiO, 2-6% of MgO and 0.5-3% of ZnO in mass percentage, and a composite carrier formed by MCM-41 molecular sieve and macroporous silicon dioxide is used as the balance, wherein the mass ratio of the MCM-41 to the silicon dioxide is 4:0.1-2.0. The preparation method comprises the following steps: synthesizing MCM-41 powder through a template agent self-assembly, mixing the MCM-41 powder with a pore-forming agent and a binder to form a composite carrier, loading a nitrate solution of nickel, magnesium and zinc by using an equal-volume impregnation method, and obtaining the final catalyst through drying and calcination. The catalyst has extremely high catalytic activity and selectivity for the amination reaction of ethanol, isopropyl alcohol, n-propyl alcohol and n-butyl alcohol under mild reaction conditions.

The invention discloses low-carbon olefin and a method for preparing low-carbon carboxylic acid through carbonylation of alcohol of the low-carbon olefin, and belongs to the field of catalytic chemistry. The method comprises the following steps: enabling raw materials containing low-carbon olefin, alcohol thereof and carbon monoxide to pass through a reactor loaded with an acidic molecular sieve catalyst, and reacting to obtain a product containing low-carbon carboxylic acid, the low-carbon olefin and the alcohol thereof are selected from at least one of ethylene, propylene, ethanol, normal propyl alcohol and isopropanol. The method uses the acidic molecular sieve as the catalyst, does not need a noble metal catalyst, has the advantages of small system corrosivity, easy product separation, less three-waste discharge and easy fixed bed process engineering, and is suitable for single-set large-scale production.