125 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 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 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 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 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.

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 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.

An ozone-containing composition comprises a volatile oily solvent, a volatile aqueous solvent, and ozone. The volatile oily solvent is present in a concentration ranging from 1 wt % to 99 wt % based on the total composition. The volatile aqueous solvent is present in a concentration ranging from 1 wt % to 99 wt % based on the total composition. The volatile oily solvent is a volatile liquid paraffin having a boiling point of 170 degrees and being lipophilic, a volatile silicone oil having a boiling point ranging from 170 degrees to 200 degrees and being lipophilic, or a mixture of the volatile liquid paraffin and the volatile silicone oil. The volatile liquid paraffin is one or more volatile liquid paraffins selected from the group consisting of light isoparaffin, light liquid isoparaffin, and hydrogenated polyisobutene. The volatile silicone oil is a volatile silicone oil containing cyclic dimethyl silicone oil. The volatile aqueous solvent is a volatile alcohol having a boiling point of 150 degrees or less and being hydrophilic and lipophilic, a volatile ketone having a boiling point of 150 degrees or less and being hydrophilic and lipophilic, or a mixture of the volatile alcohol and the volatile ketone. The volatile alcohol comprises ethanol, isopropyl alcohol, or 1-pentanol. The volatile ketone comprises methyl ethyl ketone, or 2-hexanone. The ozone-containing composition is for use in killing insects, repelling pests, or decontaminating and decomposing anticancer drugs.

The application discloses a fluorine-free flame-retardant two-phase cooling liquid and a preparation method and application thereof, the cooling liquid comprises the following components in parts by mass: a base phase change agent 75-85 parts, a phase change regulator 3-15 parts, a flame-retardant stabilizer 4-8 parts and an interface modifier 2-4 parts; wherein the base phase change agent is a binary eutectic mixture formed by decanoic acid and lauric acid, the phase change regulator is a compound of isoamyl alcohol and propylene glycol, and the flame-retardant stabilizer is a compound of triphenyl phosphate and magnesium hydroxide. The cooling liquid is completely fluorine-free, and through the synergistic effect of the components, the cooling liquid has the comprehensive excellent performances of adjustable phase change temperature, high phase change latent heat, high flame-retardant grade, long-term operation stability, good material compatibility and the like. The cooling liquid is particularly suitable for an immersed liquid cooling system integrated with an intelligent control algorithm, and can be widely applied to efficient and safe heat dissipation of extreme heat load scenes such as super-high-power AI servers, energy storage batteries and high-power semiconductors.

The invention provides a nucleic acid protective agent and a preparation method and application thereof, the nucleic acid protective agent comprises a nucleic acid stabilizing main reagent, an RNA enzyme inhibitor and an antioxidant, the nucleic acid stabilizing main reagent comprises maltodextrin, xylitol and hydroxypropyl-beta-cyclodextrin; the RNA enzyme inhibitor comprises cyclopentanol and tetrahydrofurfuryl alcohol; the antioxidant comprises sodium thiosulfate, sodium pyrophosphate and ascorbic acid. According to the nucleic acid protective agent provided by the invention, free nucleic acid substances including DNA and RNA can be preserved for 2 weeks under the condition of 37 DEG C, preserved for 6 months under the condition of 2-8 DEG C and preserved for 15 months under the condition of-20 DEG C, and the degradation rate is less than 10%.

The invention discloses a carbonyl reductase mutant and application of the carbonyl reductase mutant in synthesis of a posaconazole intermediate. The mutant protein is a non-natural protein, and the mutant protein can significantly improve the activity of catalyzing reduction of carbonyl in (S)-2-benzyloxy-3-pentanone to generate R-configuration alcohol. When the carbonyl reductase mutant strain with improved activity is applied to the production process of a posaconazole intermediate, 100-200 g / L of a substrate can be completely converted, and (2S, 3R)-2-benzyloxy-3-pentanol is generated.

The invention relates to the field of chemical engineering, in particular to a preparation method of a sodium tert-amyl alcohol production raw material. According to the preparation method provided by the invention, isoamylene and water are used as raw materials, and in the presence of a solid acid catalyst, a hydration reaction is carried out in a fixed bed reactor under a gas phase condition without using a solvent to generate tert-amyl alcohol. The process has the characteristics that no solvent is used, the generation of byproducts and the energy consumption of reaction are reduced, the reaction pressure is performed under a low-pressure condition, the reaction raw materials are only isopentene and water, the reaction process is a gas-solid phase reaction, and the mass transfer efficiency is high. The method has the characteristics of simple process flow, low operation temperature, no solvent participation, high raw material conversion rate, high tert-amyl alcohol selectivity and high product purity.

The invention discloses a method for preparing cyclopentanol by using furfural through a one-pot method, which comprises the following steps: by using isopropanol as a reaction solvent and Pt / H beta as a catalyst, reacting in a high-pressure reaction kettle at 180-190 DEG C in a hydrogen atmosphere of 4-4.5 MPa for 3-4 hours to prepare cyclopentanol by using furfural as a raw material through the one-pot method. The preparation process is simple, the raw materials are easy to obtain, the reaction time is short, the reaction process is environment-friendly and pollution-free, the catalytic system is relatively simple, the raw material conversion rate can reach 100%, and the highest cyclopentanol yield can reach 95.66%.

The invention relates to a preparation method of a molybdenum extraction agent for copper smelting tailing leachate, and belongs to the technical field of extraction agent preparation. The method comprises the steps that chitosan, beta-cyclodextrin, isoamyl alcohol and dicyclohexylcarbodiimide serve as raw materials and are mixed according to the molar ratio of 1: (1-5): (5-20): (5-10), the mixture reacts for 3-6 h at the temperature of 80-120 DEG C under the protective atmosphere and the pressure of 0.5-0.6 MPa, reaction liquid is cooled and filtered, and the molybdenum extraction agent is obtained. According to the method, high-selectivity extraction of molybdenum is realized through chelation and ion exchange between amino and hydroxyl of chitosan and molybdenum ions; beta-cyclodextrin and chitosan are crosslinked to enhance the structural stability; the dicyclohexylcarbodiimide improves the acid resistance and thermal stability, so that the extraction agent is suitable for recycling molybdenum in the copper smelting tailing leachate under the high-acid condition, the extraction rate is high, the selectivity is good, the reaction is synthesized in one step in a high-pressure kettle, multi-step modification is not needed, the process is simple and efficient, and the raw materials are bio-based products and are environmentally friendly.

The invention relates to the technical field of non-alcoholic beverages, in particular to a zero-alcohol cocktail beverage with slight alcoholic flavor and a preparation method thereof, the beverage contains the following characteristic flavor compounds: 80-150 mg / L of ethyl hexanoate, 180-250 mg / L of phenethyl alcohol, 180-280 mg / L of isoamyl alcohol, 2.5-4.0 mg / L of beta-damascenone, and the balance of water. The alcohol content of the beverage is less than 0.05 volume percent, and accurate construction of complex flavor levels is realized by taking ethyl hexanoate as a fruit aroma main body, phenethyl alcohol as a wine aroma carrier and beta-damascenone as passion fruit characteristic aroma.

The application provides a method for synthesizing 2,4,4-trimethyl-2-pentanol from diisobutene by esterification hydration, comprising the following steps: S1, esterification hydration reaction: diisobutene, organic acid and water are reacted in the presence of a catalyst; S2, separation and recovery: S3, hydrogenation reaction: 2,4,4-trimethyl-2-pentyl acetate recovered in step S2.5 is subjected to catalytic hydrogenation to generate a hydrogenation reaction liquid containing 2,4,4-trimethyl-2-pentanol and ethanol; S4, the hydrogenation reaction liquid obtained in step S3 is separated, and TMPOL is synthesized by using the above method with the organic acid as a medium, the single-pass conversion rate of diisobutene can reach 50%, and the selectivity reaches 99%. The process has the characteristics of high efficiency and high atom economy, and has great industrialization potential.