156 results about "Amyl alcohol" patented technology

The present invention provides: a fermented beer-like sparkling beverage having a real fermentation degree of 60% or less and a value of ([real extract (w / v%)]-[real final extract (w / v%)]) / [real extract (w / v%)] × 100 of 20% or less; the fermented beer-like sparkling beverage having a value of [original wort extract (w / v%)] × [malt ratio (w / w%)] of 1200 or less; and any one of the above-mentioned fermented beer-like sparkling beverages, in which the ratio (Es / HA) of the total concentration (mg / L) (HA) of ethyl acetate, isoamyl acetate, ethyl caproate, ethyl caprylate, and β-phenethyl acetate to the total concentration (mg / L) (Es) of isobutanol, isoamyl alcohol, and β-phenethyl alcohol in the beverage is 15% or less.

The invention belongs to the technical field of alkane processing, and particularly relates to a process for preparing isopentene by dehydrogenation of isopentane, a catalyst and a tert-amyl alcohol preparation process. The process for preparing isopentene by dehydrogenation of isopentane comprises an isopentane dehydrogenation device and an isopentene separation device, in the isopentane dehydrogenation device, a dehydrogenation reactor is a fixed bed adiabatic reactor and is filled with a Pt-Sn-K / alumina type alkane dehydrogenation catalyst, the catalyst has hydromethanation performance under the CO2-containing dehydrogenation reaction condition, and the arrangement and operation of a dehydrogenation reactor group comprise a mode A, a mode B or a mode C; the isopentene separation device comprises a cooling separation system, a pressure swing adsorption separation system and an optional rectification system. The tert-amyl alcohol is further prepared from isoamylene under the conditions of a fixed bed hydration reactor, ethylene glycol monobutyl ether and other solvents, and the tert-amyl alcohol product is obtained through separation. The process is superior to the prior art on the whole, and has certain application prospects.

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.

The invention relates to the technical field of microorganisms, in particular to saccharomyces cerevisiae CEC NRI16 and application thereof. The invention provides Saccharomyces cerevisiae CEC NRI16, which is used for wine brewing, can significantly improve the variety aroma and the content of ester substances and terpene substances in dry white wine, especially can promote the generation of ethyl acetate, isoamyl acetate, ethyl hexanoate, ethyl caprate and linalool, reduces the generation of isoamyl alcohol, and improves the yield of wine. The grape wine presents richer fragrance of green fruits such as pears and apples and fragrance of flower fragrance such as violet and roses, and the raw and green taste is effectively reduced. The yeast strain is strong in fermentation capacity and excellent in fermentation performance, and has great value in the aspects of maintaining the typicality of grape wine varieties and enhancing flavor characteristics.

The invention discloses Klebsiella and application thereof, and belongs to the technical field of microorganisms. According to the invention, firstly, a strain LLMJ-DNXJ-01 with high yield of tannase is screened from wine-making yeast, the identification result shows that the strain belongs to klebsiella, then the tannase activity of the strain is investigated, and the result shows that the enzyme activity reaches 8.8 + / -0.02 U / mL. In addition, the invention also investigates the application of the strain in degrading sorghum tannin, the sorghum tannin degradation rate reaches 34.95%, and isoamyl alcohol, isopentenol, caryophyllene, phenethyl alcohol, 4-vinyl guaiacol and other volatile aroma substances with Daqu characteristics can be generated through fermentation. Therefore, by integrating the tannase production capability of the strain LLMJ-DNXJ-01 and the sorghum tannin degradation and fermentation aroma production capability, the strain has relatively good development potential in the aspects of manufacturing of reinforced yeast for making hard liquor and quality improvement and aroma enhancement of white spirit.

The invention relates to the technical field of microorganisms, in particular to saccharomyces cerevisiae CEC NW94 and application thereof. The invention provides the Saccharomyces cerevisiae CEC NW94, and the Saccharomyces cerevisiae CEC NW94 is used for brewing the wine, so that the contents of glycerol and lactic acid can be increased, and the yield of volatile acid can be reduced; the synthesis of volatile substances such as ethyl 2-methylbutyrate, isoamyl alcohol and linalool is promoted, and the generation of acetic acid is inhibited, so that the wine presents complex aroma of black fruits, mushrooms and the like, and the odor of herbaceous plants, herbal medicines, vinegar and the like is effectively reduced; in addition, the strain can improve the umami of the grape wine, and improve the aroma purity, the aroma concentration, the wine body, the aftertaste and the complexity. According to the method, the flavor substances of the dry red wine are controlled through a microbial metabolism regulation and control technology, and a new technical scheme is provided for high-quality wine production.

The invention belongs to the technical field of brewing microbial fermentation, and particularly relates to a new monascus purpureus strain and application thereof. In order to further enrich beneficial microorganisms in a white spirit brewing environment, the invention provides a new Monascus purpureus strain capable of producing protease and hydrolase at high yield, and the preservation number is CGMCC (China General Microbiological Culture Collection Center) No.41533. The strain is used for preparing mouldy bran, yeast for making hard liquor and strengthened yeast for making hard liquor, and various hydrolases for brewing can be produced at high yield; and various flavor substances such as phenethyl alcohol, isoamyl alcohol and phenylacetaldehyde can be produced under the simulated pit fermentation condition, so that the requirements of brewing of multi-grain Luzhou-flavor liquor are met, a new choice is provided for improving the flavor of liquor in liquor brewing, and the method has wide application prospects and great application value.

The invention relates to the technical field of rubber tree bark beetle prevention and control and green ecological prevention and control, in particular to a rubber tree bark beetle attractant and lure preparation and application thereof. Comprising the following components in parts by weight: 1 part of (S)-cis-verbenol, 1 part of isoamyl alcohol, 1 part of longifolene and 6500 parts of absolute ethyl alcohol. The attractant can attract bark beetles on rubber trees, has the advantages of being good in attraction effect, long in lasting period, environmentally friendly and the like and is suitable for long-term monitoring and efficient prevention and control of bark beetle populations on the rubber trees, and the attraction core is not affected by terrains and terrains when applied.

The invention relates to a plasticizer for polyvinyl chloride as well as a preparation method and application thereof, and belongs to the technical field of plasticizers. The technical problems that in the prior art, a plasticizer is common in compatibility with polyvinyl chloride and prone to migration after being boiled in boiling water for a long time or making contact with a solvent are solved. The plasticizer for PVC comprises the following raw materials: a pyromellitic dianhydride crude product, toluene, 1, 4 butylene glycol, vinyl glycol ether, tribromoneopentyl alcohol, n-butyl alcohol, a hydrogen peroxide aqueous solution, an epoxidation auxiliary agent, an extraction solvent and a catalyst. The molecular structure of the plasticizer contains ester groups and epoxy groups of different structures, the bromine content is high, the plasticizer is good in compatibility with polyvinyl chloride and high in plasticizing efficiency, the contained epoxy groups are high in binding capacity with polyvinyl chloride, the plasticized polyvinyl chloride is high in flame retardant grade, and the flame retardant property is good. And the plasticized polyvinyl chloride material has excellent properties of long-time boiling water boiling resistance and low extraction rate.

The invention relates to the technical field of oil-displacing agents, in particular to a polyacrylamide-containing oil-displacing agent and a preparation method thereof.The polyacrylamide-containing oil-displacing agent is prepared from, by weight, 35-40% of functionalized polyacrylamide, 5-8% of loading filler, 2-3% of n-amyl alcohol, 5-7% of cyclohexane and the balance water; the polyacrylamide is subjected to functional modification, and the loading filler loaded with the zwitterionic surfactant is added, so that the oil-displacing agent can still keep a good synergistic effect in a complex high-temperature and high-salt environment, and a good oil-displacing characteristic is exerted.

The invention discloses a method for determining the content of various residual solvents in a clozapine bulk drug by using capillary gas chromatography, and belongs to the technical field of drug analysis. According to the method, a gas chromatographic method is adopted, a capillary chromatographic column with 6% of cyanopropyl phenyl-94% of dimethyl polysiloxane as a stationary liquid is adopted, an FID detector is adopted for detection, and the content of the residual solvent is calculated by peak area according to an external standard method; wherein the multiple residual solvents are methanol, ethanol, isopropanol, n-amyl alcohol, n-butyl alcohol and toluene. The method disclosed by the invention is good in specificity, good in linearity, reliable in accuracy and high in sensitivity; the gas chromatographic method can be used for rapidly, effectively, accurately and reliably separating and detecting the content of various residual solvents in the clozapine raw material medicine, the product quality of the clozapine raw material medicine is improved, and the medication safety of a patient is improved.

The invention discloses a method for extracting DNA from marine sediments, and belongs to the technical field of DNA extraction. The method comprises the following steps: adding sodium hexametaphosphate and a cell lysis solution into the marine sediment, uniformly mixing, incubating and centrifuging to obtain supernate; adding a chloroform-isoamyl alcohol mixed solution into the supernate, uniformly mixing, centrifuging, and removing an organic phase to obtain a water phase; and adding linear polyacrylamide and sodium chloride into the water phase, uniformly mixing, adding ethanol, precipitating in a dark place, and centrifuging to obtain the DNA extract. Compared with the prior art, the method provided by the invention has the advantages that the DNA in the marine sediment can be effectively extracted, the extraction amount is high, the concentration is high, and the obtained DNA can better meet the metagenome sequencing requirement and the subsequent PCR reaction requirement.

The invention relates to the technical field of alcohol preparation through aldehyde hydrogenation, in particular to a butyraldehyde, valeraldehyde and 2-propyl heptanal liquid-phase hydrogenation method and device, the device comprises a liquid-phase hydrogenation reactor, butyraldehyde, valeraldehyde and PBA, the liquid-phase hydrogenation reactor comprises an inner core pipe filled with a hydrogenation catalyst and an outer annular bed, and the outer annular bed is filled with a hydrogenation catalyst. The method is characterized in that butyraldehyde, valeraldehyde and PBA generated by an aldehyde-aldehyde condensation reaction are respectively fed into a hydrogenation system, the reactions of generating 2-propyl heptanol through PBA hydrogenation, generating butanol through butyraldehyde hydrogenation and generating pentanol through valeraldehyde hydrogenation are carried out in a liquid phase, and the pressure is about 2.4 MPa. Compared with gas-phase hydrogenation in the prior art, the liquid-phase hydrogenation adopted in the method has the advantages that the energy consumption is lower; the problem of high energy consumption of gas phase hydrogenation is solved.

The invention belongs to the technical field of coal washing flotation reagents, and discloses a synthesis process of an environment-friendly coal washing flotation reagent foaming agent, and the synthesis process comprises the following steps: composite reaction; water phase fusion; according to the method, biodegradable alcohols such as pentanol and sec-octanol are adopted as main raw materials, and poloxamer and glycerol are matched, so that the problem of toxic residue of a traditional hydrocarbon foaming agent is avoided. In the synthesis process, low-boiling-point impurities are removed through molecular sieve filtration and a rotary evaporator, it is ensured that the purity of the raw materials is larger than or equal to 99.5%, the proportion of the final product deionized water reaches 40-50%, the use amount of an organic solvent is greatly reduced, nanoscale wrapping of alcohol molecules by an emulsifier OP-10 is achieved through a gradient water adding method and an ultrasonic-assisted emulsification technology, and the content of the alcohol molecules is reduced. And a microemulsion structure with high interfacial film strength is formed. After lauryl sodium sulfate is added as an auxiliary emulsifier, the strength of an oil-water interfacial film is improved by 30% or above, and the half-life period of foam is prolonged to 1.8 times of that of a traditional process.

According to the method for preparing the methyl heptenone through the Saucy-Marbet reaction of the 2-methyl-3-butene-2-alcohol and the 2-methoxypropene, by controlling the content of the key impurities tert-amyl alcohol and water in the raw materials, the reaction conversion rate can be larger than or equal to 99.5%, and the reaction selectivity can be larger than or equal to 98.5%. The method has the advantages of cheap and easily available catalyst, mild reaction conditions, simple operation and high reaction yield, and solves the problems of more three wastes, complex side reaction, difficult product purification and the like in the prior art.

A method for recovering boron oxide from dust generated in the ferroboron smelting process belongs to the technical field of boron metallurgy and specifically comprises the following steps: in the ferroboron smelting process, high-temperature tail gas is introduced into a cyclone dust collection system and then is fed into a bag dust collection system to obtain boron-containing dust; the preparation method comprises the following steps: taking hexanediol, isooctanol, isoamyl alcohol and butanol as raw materials to prepare mixed polyol; the method comprises the following steps: mixing boron-containing dust with a composite solvent, and then transferring to a stirring reflux device for leaching under a constant-temperature condition; after the leaching is finished, separating by adopting a vacuum filtration mode to obtain a boron-containing solution and primary residues, washing the obtained primary residues by using butanol to obtain a washing solution and secondary residues, and returning the washing solution to the washing process of the primary residues for recycling; carrying out vacuum evaporation on the boron-containing solution to obtain solid-phase diboron trioxide and a solvent, and carrying out vacuum evaporation and condensation on the solvent to obtain a mixed solvent; the solid-phase diboron trioxide is used as a ferroboron smelting raw material, and the mixed solvent is returned to the selective leaching process for recycling.

The present application relates to the field of magnesium-aluminum composite oxide preparation, and discloses a magnesium-aluminum composite oxide and a preparation method thereof.The method comprises the following steps: (1) under anhydrous conditions, performing a first reaction on aluminum and a first aliphatic alcohol to obtain an alkoxide aluminum-containing material; (2) under the action of a catalyst, performing a second reaction on the alkoxide aluminum-containing material obtained in step (1), magnesium and a second aliphatic alcohol under anhydrous conditions; (3) performing hydrolysis on the reaction product of step (2) to obtain a magnesium-aluminum bimetallic alkoxide, and then performing optional drying and calcination to obtain a magnesium-aluminum composite oxide; wherein the first aliphatic alcohol and the second aliphatic alcohol each independently comprise n-pentanol and optionally n-hexanol. The preparation method of the magnesium-aluminum composite oxide provided by the present application can obtain a high-purity magnesium-aluminum composite oxide without subsequent purification treatment, and has the advantages of short initiation time and short reaction time.

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 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 a preparation method of 3-ethoxy isoamyl propionate, and belongs to the technical field of organic solvent synthesis. The preparation method of the 3-ethoxy isoamyl propionate comprises the following steps: S1, adding ethanol, a polymerization inhibitor and a catalyst A into a reaction kettle, heating to 40-55 DEG C, then dropwise adding ethyl acrylate, preserving heat, and carrying out addition reaction for 1-3 hours to obtain a reaction mixture; s2, adding an acidic material for neutralization, and carrying out vacuum rectification to obtain ethyl 3-ethoxypropionate; s3, adding ethyl 3-ethoxypropionate and a catalyst B into a reaction kettle, heating to 100-120 DEG C, introducing isoamyl alcohol, controlling the reaction temperature to 100-115 DEG C, and carrying out transesterification for 2.5-4 hours to obtain a crude product; and S4, cooling to stop the reaction, separating to remove the catalyst B, and carrying out reduced pressure rectification on the obtained crude product to obtain the 3-ethoxypropionic acid isoamyl ester. The method has the effects of mild process, high conversion rate and high product yield.

The invention discloses an alcohol distillation and purification system, belongs to distillation and purification of alcohol in the technical field of alcohol production, and aims to solve the technical problems that in the prior art, the content of methanol and n-propanol in finished edible alcohol exceeds standard values, and the quality of the finished product is low. Comprising a crude tower, an aldehyde removal tower, a water washing tower, a rectifying tower, a methanol removal tower, a recovery tower, an industrial alcohol purification tower and an industrial alcohol storage tank, the crude tower, the aldehyde removal tower, the water washing tower, the rectifying tower and the methanol removal tower are sequentially connected, and impurity outlets of the crude tower, the aldehyde removal tower, the water washing tower, the rectifying tower and the methanol removal tower are all connected with the recovery tower; low-concentration industrial alcohol in the recovery tower is input into an industrial alcohol purification tower, pure high-concentration alcohol output from the upper part of the industrial alcohol purification tower is conveyed to an aldehyde removal tower and a rectifying tower, high-concentration industrial alcohol output from the upper part of the industrial alcohol purification tower is conveyed to an industrial alcohol storage tank, and hot water output from the bottom of the industrial alcohol purification tower is conveyed to a water washing tower. The system can reduce the content of isoamyl alcohol, isobutanol and n-propyl alcohol in a finished product and improve the quality of the finished product.

The disclosure relates to oral care compositions comprising guanidine in free or orally acceptable salt form, a cationic quaternary ammonium compound (e.g., a pyridinium compound) (e.g., cetyl pyridinium chloride (CPC)), a fluoride source, and optionally a zinc source (e.g., zinc lactate or zinc citrate and zinc oxide) as well as to methods of using and of making these compositions. 20 25 20 43 72 12 J un 2 02 5 2 0 2 5 2 0 4 3 7 2 1 2 J u n 2 0 2 5 A B S T R A C T T h e d i s c l o s u r e r e l a t e s t o o r a l c a r e c o m p o s i t i o n s c o m p r i s i n g g u a n i d i n e i n f r e e o r o r a l l y a c c e p t a b l e s a l t f o r m , a c a t i o n i c q u a t e r n a r y a m m o n i u m c o m p o u n d ( e . g . , a p y r i d i n i u m c o m p o u n d ) ( e . g . , c e t y l p y r i d i n i u m c h l o r i d e ( C P C ) ) , a f l u o r i d e s o u r c e , a n d o p t i o n a l l y a z i n c s o u r c e ( e . g . , z i n c l a c t a t e o r z i n c c i t r a t e a n d z i n c o x i d e ) a s w e l l a s t o m e t h o d s o f u s i n g a n d o f m a k i n g t h e s e c o m p o s i t i o n s . 2 0 2 5 2 0 4 3 7 2 1 2 J u n 2 0 2 5

A method for extracting DNA from Kappa longicornis, relating to the field of molecular biology, includes the following steps: grinding a Kappa longicornis sample into powder; adding lysis buffer preheated to 60–65°C to the powder and incubating at 60–65°C; adding Proteinase K for protein digestion; adding RNase A for RNA digestion; extracting with a mixture of chloroform and isoamyl alcohol, centrifuging, and collecting the supernatant; adding pre-cooled isopropanol to the supernatant for precipitation, centrifuging, and obtaining the DNA precipitate; washing and drying the DNA precipitate; and dissolving the DNA in TE buffer or nuclease-free water. The beneficial effects of this invention are as follows: by optimizing the lysis buffer and combining it with stepwise enzymatic hydrolysis and organic extraction processes, polysaccharides and pigments of *Kappa longicornis* can be efficiently removed, and the extracted DNA concentration is >300 ng / μL, with a purity of A260 / A280≈1.76 and A260 / A230≈2.21, meeting the requirements of downstream molecular experiments; at the same time, reduced glutathione is used instead of 2-mercaptoethanol, making the operation safe and odorless, with low reagent costs, and suitable for batch sample processing.

The application discloses a preparation method of a key intermediate of a montelukast sodium side chain acid, belongs to the technical field of pharmaceutical intermediates, and relates to a key intermediate of a montelukast sodium side chain acid, i.e. 1-bromomethylcyclopropylacetonitrile, which is characterized by the preparation method of the 1-bromomethylcyclopropylacetonitrile. The preparation method is as follows: taking tribromoneopentyl alcohol as a starting material, and obtaining 1-bromomethylcyclopropylacetonitrile through a cyclization reaction, an iodination reaction and a cyano substitution reaction. The 1-bromomethylcyclopropylacetonitrile is prepared by using a brand-new synthesis process, starting from tribromoneopentyl alcohol, through a cyclization reaction, an iodination reaction and a cyano substitution reaction. The method solves the blank of the preparation method of 1-bromomethylcyclopropylacetonitrile in the prior art, and also solves the defects of a long reaction theoretical cycle and a low actual yield and a large amount of impurities in the reaction of preparing 1-bromomethylcyclopropylacetonitrile by first preparing 1-hydroxymethylcyclopropylacetonitrile and then reacting phosphorus tribromide with the 1-hydroxymethylcyclopropylacetonitrile.

The application discloses an end hexaazido nitrate polyether adhesive and a synthesis method thereof. The method first takes triazido neopentyl alcohol and glycidyl ether nitrate as raw materials, boron trifluoride-ether complex as a catalyst, and obtains triazido neopentyl polyglycidyl ether nitrate alcohol through cation ring-opening polymerization reaction; then takes triazido neopentyl polyglycidyl ether nitrate alcohol and hexamethylene diisocyanate as raw materials, dibutyl tin dilaurylate as a catalyst, and obtains end hexaazido polyglycidyl ether nitrate through addition reaction, namely the end hexaazido nitrate polyether adhesive. The application is mainly used for solid propellants, is used for synthesizing polytriazole elastomers, improves the content and crosslinking density of hard segments, promotes microphase separation of the elastomers, and thus improves mechanical properties.

The present invention relates to a method for the preparation of 3-methyl-3-butene-1-ol (isoprenol), comprising the steps of preparing isobutylene (also: isobutene, 2-methylpropene) by contacting 3-methylbutan-1-ol (isoamyl alcohol) to a catalyst comprising at least one catalytically active metal and reacting at least one formaldehyde source and the isobutylene obtained in step a-i) to obtain isoprenol. Furthermore, the present invention refers to processes for the preparation of 3-methyl-2-butene-1-ol (prenol), of 3-methyl-3-butenal (isoprenal), of 3-methyl-2-butenal (prenal), and of 3,7-dimethy l-octa-2, 6-dienal (citral) and further downstream products comprising the use of isoprenol of the present invention and the resulting products and product streams.

The application discloses cherry essence, and a preparation method thereof. The cherry essence comprises the following components in parts by weight: 80-98 parts of propylene glycol; 0.5-3 parts of benzaldehyde; 0.5-3 parts of ethyl acetate; 0.1-1 part of acetic acid; 0.1-1 part of gamma-decalactone; 0.1-0.8 part of ethyl butyrate; 0.01-0.2 part of butyric acid; 0.005-0.03 part of isoamyl alcohol; and 0.005-0.03 part of butanol. The preparation method comprises the following steps: taking all components of the cherry essence according to the proportion requirements, stirring all components of the cherry essence in a stirring container for 10-15 minutes, and then storing the mixture in a storage container. The cherry essence can be used as a food additive, and can be used in various foods to enhance the natural cherry aroma and natural taste of the foods. The aroma quality and stability of the cherry essence are superior to those of the same kind of essence in China.

The synthesis method comprises the following steps: sequentially adding a nickel catalyst, a phosphine ligand, a solvent, PhMe2SiBpin, a raw material 2 and a raw material 1 into a reaction container, stirring for 12-30 hours at a specified temperature in a nitrogen or inert gas atmosphere, cooling to 0 DEG C, adding a saturated ammonium chloride solution for quenching reaction, reducing pressure to remove the solvent, filtering, washing, and drying to obtain the silyl and methyl-containing alkene amyl alcohol. And performing column chromatography separation to obtain a target product. The synthesis of the 2-methyl-3-silyl-4-ene pentanol and the derivative thereof and the synthesis of the 2-methyl-5-silyl-3-ene pentanol and the derivative thereof can be realized only through regulation and control of the ligand in the nickel catalyst, and the method is wide in raw material source, convenient to operate, low in production cost and high in safety.

The invention belongs to the technical field of biology, and discloses application of a microorganism-derived volatile organic compound 3-tert-butyl-2, 2, 4, 4-tetramethylpent-3-alcohol in prevention and treatment of sweet potato pathogenic bacteria, the specific component 3-tert-butyl-2, 2, 4, 4-tetramethylpent-3-alcohol is screened out from VOCs (volatile organic compounds) generated by biocontrol bacteria S14, and the 3-tert-butyl-2, 2, 4, 4-tetramethylpent-3-alcohol is found through verification, so that the application of the microorganism-derived volatile organic compound 3-tert-butyl-2, 2, 4, 4-tetramethylpent-3-alcohol in prevention and treatment of sweet potato pathogenic bacteria is realized. The 1, 2, 3, 4-tetramethylpent-3-ol has antibacterial activity on fusarium oxysporum and fusarium solani.

The invention belongs to the technical field of medicine synthesis processes, and particularly relates to a preparation method of high-yield and high-purity buspirone hydrochloride. According to the method, 8-(2-pyrimidinyl)-8-aza-5-5-azonium spiro [4.5] decane hydrobromide (pyrimidino piperazine quaternary ammonium salt for short) and 3, 3-tetramethylene glutarimide are taken as raw materials, a mixed solvent of methylbenzene and n-amyl alcohol and / or n-hexanol is taken as a solvent, buspirone can be generated in the presence of sodium carbonate without adding a phase transfer catalyst, and buspirone can be obtained through acid adjustment and extraction. After toluene reverse phase impurity removal, a water phase is adjusted to be alkaline, an ethanol solution of hydrogen chloride is added after toluene extraction, and buspirone hydrochloride solid is directly separated out. The preparation process has a very good cleaning effect on impurities, and the obtained buspirone hydrochloride is high in purity, high in process yield, good in atom economy and low in output of three wastes.