Product
Patsnap Eureka
For R&D, Patsnap Eureka makes reading and utilizing patents & technical documents easy.
Patsnap Eureka AIR
Designed for self-driven R&D workflows. Generate viable solutions, solve complex R&D challenges, empower your innovation with AI.
Patsnap Eureka Materials
Designed for material experts only. Revolutionize your material R&D, from search, analyze, to developing new materials.
Feature
TechResearch
Generate reliable direction feasibility study reports for your R&D in just a few steps.
TechSeek
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
TechMind
As an expert in R&D Theories, TechMind can generates customized viable solutions instantly.
TechRisk
Analyze your overall solution with one click, know your potential R&D risks in advance.
TechMonitor
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
42 results about "Propyl formate" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
N-PROPYL FORMATE is a clear colorless liquid with a pleasant odor. Slightly soluble in water and less dense than water.Hence floats on water.Vapors are heavier than air.
Methyl propionate preparation method
ActiveCN108003023AHigh activityEasy to makePreparation by carbon monoxide or formate reactionReaction temperatureRuthenium
The present invention relates to a methyl propionate preparation method, which comprises: mixing methanol and a ruthenium-supported metal oxide catalyst, placing the obtained mixture in a pressure container, filling with ethylene and carbon monoxide, sealing, and stirring, wherein the reaction temperature is more than or equal to 130 DEG C, the reaction time is more than or equal to 2 h, and the ruthenium-supported metal oxide catalyst is one or a plurality of material selected from Ru / TiO2, Ru / Nb2O5, Ru / CeO2 and Ru / Al2O3. According to the present invention, with the method, the catalyst is easily separated from the reaction system after the reaction, and can be used repeatedly, and the yield of propyl formate is up to 90%.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Tea polyphenol antibacterial degradable plastic film composite and preparation method thereof
The invention discloses a tea polyphenol antibacterial degradable plastic film composite and a preparation technology thereof. The tea polyphenol antibacterial degradable plastic film composite is characterized by adopting starch, polyvinyl alcohol, urea, glycerin, L-proline, NaOH, nano TiO2, manganese stearate, kaolin, chitosan, sodium carboxymethylcellulose, attapulgite, graphene oxide, polyethyleneimine, vinyl acetate, tea polyphenol, calcium propionate, ethyl p-hydroxyl propyl formate and the like as raw materials. In the invention, nano TiO2 is modified by proline sodium to obtain a composite catalyst; and by adopting kaolin as a bioactivator and manganese stearate as a degradation accelerator, a biodegradable composite film is prepared. Sodium carboxymethylcellulose is added and blended with attapulgite and chitosan to obtain a composite. The starch is modified by vinyl acetate, and a biodegradable composite is prepared through grafting copolymerization; and due to the static binding force between graphene oxide and polyethyleneimine, the barrier property of the composite film is improved, and the oxygen permeability is lowered.
Owner:安徽省阜阳市国泰彩印包装有限公司
Method for loading drugs on drug eluting balloon catheter
ActiveCN104174073ARelease stabilityUniform drug coatingSurgeryCoatingsDrug eluting balloonDrug release
The invention relates to a method for loading drugs on a drug eluting balloon catheter. The method comprises the following steps: (1) swelling a balloon for 0.5-3 hours; (2) spraying a mixed liquid composed of therapeutic drugs, additives and a solvent onto the surface of the swelled balloon by adopting a vacuum spraying technology, and naturally drying by air for 10-30 minutes, wherein the weight ratio of the solvent, the therapeutic drugs and the additives in the mixed liquid is (10-90) to (0.5-30) to (5-60); and the solution for swelling the balloon in the step (1) is any one or more of methyl formate, ethyl acetate, ethyl formate, methyl acetate, propyl formate, methyl propionate, ethyl propionate, phenyl acetate, n-octyl acrylate and methyl benzoate. According to the method for loading drugs on the drug eluting balloon catheter, a drug coating can be uniform and firm, and drugs can be released quickly and stably.
Owner:LIAONING YINYI BIOTECH CO LTD
New process for separating methanol-propyl formate azeotrope through extractive distillation
InactiveCN104693005AEnergy consumption advantagePurity advantageOrganic compound preparationCarboxylic acid esters preparationZeotropic mixtureExtractive distillation
The invention relates to a new process for separating methanol-propyl formate azeotrope through extractive distillation. The methanol-propyl formate azeotropic mixture is separated through the extractive distillation process. A double-tower process is adopted for the extractive distillation process and is composed of an extraction rectifying tower and a solvent recovering tower. The production capacity of the extraction rectifying tower not only needs a reasonable technological process and a tower structure, but also has a requirement on the factors such as the dosage ratio of the raw material and the extracting agent and the feeding location. Aiming at an azeotropic system of the methanol-propyl formate, the mixed solution of the glycol, N-methyl pyrrolidone and an ionic liquid [Emim][BF4] is taken as the extracting agent so as to separate the methanol-propyl formate.
Owner:UNIV OF JINAN
Facial mask containing ossein
InactiveCN105748319AGood effectGood moisturizing effectCosmetic preparationsToilet preparationsVitamin E AcetateGlycerol
The invention discloses a facial mask containing ossein. The facial mask contains the components of ossein, butanediol, glycerol, carbomer, hydrolyzed elastin, pea peptide, ethylene diamine tetraacetate (EDTA) disodium, diazolidinyl urea, allantoin, nicotinamide, sodium hyaluronate, palmitoyl pentapeptide, triethanolamine, nipalgin methyl formate, nipalgin propyl formate, silicone oil, steareth-2, steareth-21, cetyl alcohol, polyacrylate crosslinked polymer-6, octyldodecanol, white mineral oil, vitamin E acetate, an essence, deionized water and the like. The facial mask containing ossein is easy to spread on a skin when in use, can be easily and quickly absorbed by the skin to ensure that the skin is moistened immediately, a dried skin can be improved very quickly, and if being used continuously for a long time, the facial mask can effectively promote the elasticity and softness of eye skin, enable the skin to be smooth and compact, slow down smooth cuts of the skin, and beautify the skin.
Owner:FOSHAN WIN COSMETIC
Separation method for batch extractive distillation of methanol-propyl formate azeotrope
InactiveCN104370693AHigh purityReduce energy consumptionOrganic compounds purification/separation/stabilisationOxygen-containing compound preparationIsobutanolTetrafluoroborate
The invention discloses a separation method for batch extractive distillation of a methanol-propyl formate azeotrope. The method comprises the following steps: at atmospheric pressure or reduced pressure, by using ethylene glycol or N-methyl pyrrolidinone and an ionic liquid namely 1-ethyl-3-methyl tetrafluoroborate [Emim][BF4] as extracting agents, sequentially extracting qualified methanol and isobutanol from a tower top, pumping the extracting agents into an overhead storage tank when compositions of the extracting agents of a heating kettle meet the requirements, and feeding to perform the next batch of batch extractive distillation separation. The separation method disclosed by the invention has the advantages that a methanol-propyl formate azeotropic system can be damaged by using the ionic liquid and commonly-used solvents as the extracting agents, and methanol and propyl formate products with high purity can be obtained.
Owner:UNIV OF JINAN
Method for preparing cefuroxime acid
InactiveCN106432267AThe synthetic method is green and environmentally friendlyHigh yieldOrganic chemistryCefuroximeOrganic layer
The invention provides a method for preparing cefuroxime acid. The method is characterized by comprising the following steps: (1) mixing deammonized formyl cefuroxime in liquid ester, adding a strong amino carbamylation reagent sulfonylisocynate, and performing a temperature-controlled reaction; (2) adding purified water after the reaction is completed, and performing hydrolysis; (3) adding the liquid ester after hydrolysis is completed, adjusting the pH value to be 1.9-2.0 by using hydrochloric acid, standing for layering, and performing vacuum concentration on an organic layer so as to obtain an organic layer concentrated solution; (4) adding purified water into the organic layer concentrated solution, performing crystallization, and filtering so as to obtain cefuroxime acid, wherein the liquid ester used in the step (1) and the step (3) is selected from methyl acetate, acetic ether, n-butyl acetate, methyl formate, ethyl formate and propyl formate. The method for preparing cefuroxime acid, which is provided by the invention, is green and environmental-friendly, low in cost, high in yield and good in quality.
Owner:珠海保税区丽珠合成制药有限公司
Isopropanol-propyl formate azeotrope rectification separation method based on mixed solvent as extracting agent
InactiveCN105001053AReduce loss costReduce manufacturing costOrganic compound preparationCarboxylic acid esters preparationProcess engineeringTower
An isopropanol-propyl formate azeotrope rectification separation method based on a mixed solvent as an extracting agent is provided. The isopropanol-propyl formate extraction rectification process adopts two towers of an extraction rectification tower and an extracting agent recovery tower, and adopts continuous decompression operations; the extracting agent is added from a tower plate at the upper end of the extraction rectification tower, and raw materials are added from a tower plate at the lower end of the extraction rectification tower; a steam at the tower bottom of the extraction rectification tower continuously enters the extracting agent recovery tower, and a feeding position is at the middle of the tower; the extracting agent at the tower bottom of the extracting agent recovery tower is used as a supplement of a solvent of the extraction rectification tower. The method has the biggest characteristics that the mixed extracting agent composed of a traditional solvent and an ionic liquid is adopted for extraction, and the method has great advantages in energy consumption, environmental pressure and product purity and is especially suitable for large-scale industrialized application.
Owner:UNIV OF JINAN
Preparation method of facial mask containing ossein
InactiveCN105560078AEasy to useSlow absorptionCosmetic preparationsToilet preparationsVitamin E AcetateCross-link
The invention discloses a preparation method of a facial mask containing ossein. The preparation method comprises the following steps: (1) dissolving the ossein into a part of deionized water, then adding disodium EDTA, imadazolidinyl urea, glycerol, butanediol, allantoin, carbopol, polyacrylate cross-linked polymer-6 and sodium hyaluronate, heating and dispersing the mixture, and using the mixture as an A phase for standby use; (2) adding stearyl ether-2, stearyl ether-21, octyldodecanol, white mineral oil, vitamin E acetate, nipagin methyl formate, nipagin propyl formate and silicone oil into an oil phase, heating and dispersing the mixture, and using the mixture as a B phase for standby use; (3) starting a stirrer, slowly adding the B phase into the A phase, adding nicotinamide and triethanolamine after continuously stirring and cooling, adding essence, hydrolyzed elastin, palmitoyl pentapeptide and pea peptide, continuously stirring and cooling, and stopping stirring, thus discharging. According to the facial mask containing the ossein, disclosed by the invention, the elasticity and the softness of skins around eyes can be effectively increased, the skins are kept to be smooth and compact, fine lines of the skins can be relieved, and the skins are beautified.
Owner:FOSHAN WIN COSMETIC
Batch extraction distillation separation method for propyl alcohol-propyl formate azeotropic mixture
InactiveCN102527072AFlexible operationReduce cost inputOrganic compound preparationCarboxylic acid esters preparationIsobutanolZeotropic mixture
The invention discloses a batch extraction distillation separation method for a propyl alcohol-propyl formate azeotropic mixture, which belongs to the separation technique for the propyl alcohol-propyl formate azeotropic mixture. The method comprises utilizing isobutanol as extractant, enabling an extraction distillation tower to operate under the following conditions that the mass ratio of the extractant to tower top distillate is 0.5:1-10:1 and material inlet temperature of the extractant is 20-60 DEG C, controlling the extraction distillation tower top to have different temperatures and different reflux ratios, respectively extracting a propyl formate product, a propyl alcohol-propyl formate transition section I, a propyl alcohol product and a propyl alcohol- extractant transition section II, pumping the extractant into a high-position tank when extractant compositions of a heating kettle reach the requirements, and feeding materials to perform next batch extraction distillation separation. The batch extraction distillation separation method has the advantages that the single-tower equipment is low in cost and flexible in operation, and the extractant is utilized to destroy a propyl alcohol-propyl formate azeotropic system to separate out high-purity propyl alcohol and propyl formate products.
Owner:UNIV OF JINAN
Method for separating ethanol-propyl formate azeotrope by continuous extractive rectification
InactiveCN104628519AEnergy consumption advantagePurity advantageOxygen-containing compound preparationOrganic compound preparationSolventPropyl formate
The invention relates to a method for separating an ethanol-propyl formate azeotrope by continuous extractive rectification. The extractive rectification usually adopts a double-tower process which is composed of an extractive rectification tower and a solvent recovery tower. The productivity of the extractive rectification tower needs the reasonable technical process and tower structure, and has requirements for raw material / extractant ratio, feed position and many other factors. Aiming at the ethanol-propyl formate azeotropic system, the method adopts a ethylene glycol and a mixed solution of ionic liquids ([Emim][BF4] and [Bmim][BF4]) as extractants to finally separate the ethanol and propyl formate.
Owner:UNIV OF JINAN
Ocular region roll-on essence containing bone collagen
InactiveCN105662911AModerate viscosityGood spreadabilityCosmetic preparationsToilet preparationsGlycerolSteel ball
A roll-on eye serum containing collagen, including collagen, polyacrylate crosspolymer-6, glycerin, propylene glycol, hydrolyzed elastin, pea peptide, disodium EDTA, diazolidinyl urea, allantoic Sodium hyaluronate, niacinamide, sodium hyaluronate, methylparaben formate, propylparaben formate, di-tert-butyl-4-methylphenol, silicone oil, C14-22 alcohol-C12-20 alkyl glucoside, Caprylic / capric triglyceride, C12-15 phenyl potassium ester, vitamin E acetate, essence, deionized water and other components. A roll-on eye essence containing collagen, which makes eye care products more easily absorbed by the skin. Rolling steel balls are used to roll back and forth on the eye skin, which can not only massage the skin, but also effectively The active ingredients are more fully absorbed, effectively improving the elasticity and softness of the skin around the eyes, keeping the skin smooth and firm, soothing fine lines and beautifying the skin.
Owner:FOSHAN WIN COSMETIC
A drug-loading method for a drug-eluting balloon catheter
ActiveCN104174073BRelease stabilityUniform drug coatingSurgeryCoatingsDrug eluting balloonDrug release
The invention relates to a drug-loading method for a drug-eluting balloon catheter, which comprises the following steps: ① Swelling the balloon first, and the swelling treatment time is 0.5h-3h; Spray the mixture of solvent and solvent on the surface of the swollen balloon, and let it dry naturally for 10-30 minutes. The weight-number ratio of solvent, therapeutic drug and additive in the mixed liquid is 10-90:0.5-30:5-60. Step ① The solution used for swelling the balloon is methyl formate, ethyl acetate, ethyl formate, methyl acetate, propyl formate, methyl propionate, ethyl propionate, phenyl acetate, octyl acrylate and any one of methyl benzoate, or a mixture of two or more of them. The drug-loading method of the drug-eluting balloon catheter of the invention can make the drug coating uniform and firm, and the drug release is rapid and stable.
Owner:LIAONING YINYI BIOTECH CO LTD
Method for synthesizing propionate through ester-ester exchange path
InactiveCN109503378AHigh selectivityHigh activityOrganic compound preparationPreparation by transesterificationReaction temperatureIonic liquid
The invention provides a method for synthesizing propionate through an ester-ester exchange path and relates to a method for synthesizing the propionate. According to the method, reaction raw materials include, but are not limited to ethyl formate, propyl formate, butyl formate, ethyl acetate, propyl acetate, butyl acetate and the like; the method for synthesizing the propionate through an ester exchange one-step method is adopted. A catalyst comprises alkaline materials including ionic liquid, soluble strong base, solid base and the like respectively; the catalyst has the advantages of high catalysis efficiency and no pollution. By taking methyl propionate and ethyl acetate reaction as an example, KOH is used as the catalyst, the mol ratio of the raw materials is 1 to 1, the reaction temperature is 60 DEG C and the reaction time is 5 min; the conversion ratios of the methyl propionate and the ethyl acetate can reach 70 percent or more; products comprise ethyl propionate and the methylacetate. The whole reaction path has the characteristics of short synthetic route, simple technological flow and high yield and the catalyst is stable, does not become inactive and can be repeatedlyutilized.
Owner:SHENYANG INSTITUTE OF CHEMICAL TECHNOLOGY
Extraction separation method of acetylpropionic acid
ActiveCN107915620AOrganic compound preparationCarboxylic compound separation/purificationPhosphatePhosphine oxide
The invention relates to an extraction separation method of acetylpropionic acid. The method comprises the step of contacting an acetylpropionic acid water solution with a complexing extractant, wherein the complexing extractant is prepared from a complexing agent and a cosolvent, the complexing agent is selected from at least one of tributyl phosphate, trioctyl phosphate or trialkyl phosphine oxide, and the cosolvent is selected from at least one of ethyl formate, propyl formate, ethyl acetate, propyl acetate, methyl propionate or ethyl propionate; the weight ratio of the complexing agent tothe cosolvent is (20:1)-(1:20). The method can be used for industrial production for separation purification of acetylpropionic acid.
Owner:CHINA PETROLEUM & CHEM CORP +1
Non-chrome passivating agent for steel, zinc plates, aluminum and aluminum alloy pieces, zinc and zinc alloy
The invention relates to a non-chrome passivating agent for steel, zinc plates, aluminum and aluminum alloy pieces, zinc and zinc alloy, which consists of the following materials in percentage by mass: 15 to 35 percent of amino propyl formate resin, 2.0 to 4.0 percent of r-mercaptopropyltrimethoxysilane, 0.1 to 0.5 percent of fluorozirconate, 0.5 to 1.0 percent of acetic acid, 8.0 to 10.0 percent of glycerol silane ether, 0.05 to 0.10 percent of ammonium dihydrogen phosphate, 1.0 to 3.0 percent of butyl cellusolve, 3.0 to 8.0 percent of polyoxyethylene, 0.1 to 0.5 percent of organic lanthanide compound, 0.01 to 0.10 percent of polyoxyethylene polyoxypropylene ether, and the balance of pure water. The non-chrome passivating agent has the advantage that the non-chrome passivating agent is a surfactant with non-nickel, non-chrome, non-sodium nitrite, non-nitrate, non-fluorine ions, non-three strong acids and easy degradation.
Owner:SHANGHAI PINXIN METALLURGY EQUIP
Extractive distillation method of tert-butyl alcohol-propyl formate azeotropic mixture
InactiveCN105669369AHigh purityImprove extraction efficiencyOxygen-containing compound preparationOrganic compound preparationZeotropic mixtureExtractive distillation
The invention provides an extractive distillation method of a tert-butyl alcohol-propyl formate azeotropic mixture. The extractive distillation process of a tert-butyl alcohol-propyl formate azeotropic mixture comprises an operation mode with continuous pressure reduction or an operation mode with intermittent pressure reduction, a plurality of extractants are selected, so that the tert-butyl alcohol product with high purity and the propyl formate product with high purity are obtained, and the extractants can be recycled and utilized. The method is characterized in that except traditional solvents are used in distillation, a mixed extractant which is composed of traditional solvents and ionic liquid is employed; the method has the advantages in the aspects of energy consumption, environment stress, and product purity; the method is especially suitable for industrial application of large scale; the method especially aims at separation of the tert-butyl alcohol-propyl formate azeotropic system, and fills the technological blank in prior art.
Owner:UNIV OF JINAN
Preparation method of nontoxic high-purity ginkgo total lactones and monomers thereof
ActiveCN105061458ASave the long process of recrystallizationImprove developmentOrganic chemistryBulk chemical productionSolventSilica gel
The invention relates to a preparation method of nontoxic high-purity ginkgo total lactones and monomers thereof, which adopts a solvent extraction+precipitation+compound filled column chromatography+supercritical CO2 back extraction crystallization combined technique to prepare the high-purity ginkgo total lactones and monomers thereof. The extraction solvent is propyl formate, the precipitation solvent adopts petroleum ether, and the total lactone purity is up to 98%. The neutral aluminum oxide / normal-phase silica gel compound filled column chromatography is performed, and the supercritical CO2 back extraction crystallization is performed to obtain the ginkgo lactone monomers A, B and C with the purity of 97% or above; and no toxic ginkgolic acid is detected. The separation purification technique has the advantages of simple method and high product purity, and can be easily used in practical production.
Owner:HEFEI UNIV OF TECH
Rapid-hardening underground pipeline grouting repair polymer and preparing method
The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg / m3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg / m3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.
Owner:INFRASTRUCTURE RENEWAL INST OF SOUTHERN CHINA
Formula of plastic for beverage package
InactiveCN106750727AImprove thermal stabilityImprove antioxidant propertiesPolymer scienceThermal stability
The invention discloses a formula of plastic for beverage package, and relates to the field of packaging materials. The plastic for beverage package is prepared by adopting polyethylene, polypropylene, triphenyl phosphite, dibutyl phthalate, vinyl triamine, sodium silicate, propyl formate and diphenyl ketone as raw materials, has high heat stability, oxidation resistance and light stability, and is suitable for packaging liquid beverages.
Owner:陈小秋
Green synthesis method of 3-phenanthridinyl propyl formate compound
ActiveCN110317170AReduce usageImprove compatibilityOrganic chemistryRotary evaporatorSynthesis methods
The invention discloses a green synthesis method of a 3-phenanthridinyl propyl formate compound. 2-biaryl isonitrile is accurately weighed and added into a reaction tube containing a mixed solution oftetrahydrofuran and water; the reaction tube is placed on a W 380nm LED lamp for irradiation reaction for some time at the room temperature; after the reaction is over, a reaction mixture is poured into a separating funnel containing deionized water, ethyl acetate is used for extraction and washing three times, and organic phases are combined; the obtained organic phases are dried with magnesiumsulfate, magnesium sulfate is removed through suction filtration, and the organic phases are condensed by using a rotary evaporator to obtain residues; the residues are subjected to column chromatography separation, and a target product 3-phenanthridinyl propyl formate compound is obtained. A simple and green light promotion strategy is adopted, a water containing system is used as a reaction solvent without adding a photocatalyst and an oxidant, and the 3-phenanthridinyl propyl formate compound is synthesized. The method has the advantages that the operation is simple, the raw materials are cheap and easy to obtain, the reaction condition is mild, the product is easy to separation, and the compatibility of the functional groups is excellent.
Owner:HUAIBEI NORMAL UNIVERSITY
Heterogeneous catalytic distillation process for preparing propionate by ester exchange
InactiveCN109734583ALow costShort selectivityChemical industryPreparation by transesterificationEnvironmental resistancePropanoic acid
The invention discloses a catalytic rectification process which takes heterogeneous solid base as a catalyst to catalyze methyl propionate and reaction raw material esters such as ethyl formate, propyl formate, butyl formate, ethyl acetate, n-propyl acetate, butyl acetate and the like to synthesize propionate with high added value and high purity in one step. The advantage of the process is that the boiling point of a general product methyl propionate is the lowest, and a reaction system is separated from the top of a reaction rectification tower to push the reaction forward, resulting in a more complete reaction of the reaction raw materials except the methyl propionate. The solid base catalyst is adopted, so that the catalytic efficiency is high, the stability is good, and the liquid phase product and the solid phase catalyst do not need to be separated. In addition, the raw material esters and the product esters generally have no azeotropy and are easy to separate, which is of greatsignificance for large-scale and low-cost production of propionic acid esters with high added value and high purity. The whole reaction process is green, energy-saving, environment-friendly and efficient.
Owner:SHANDONG SHIDA SHENGHUA CHEM GROUP
A kind of preparation method of o-fluorobenzaldehyde
ActiveCN109627154BReduced activityReaction is easy to controlOrganic compound preparationCarbonyl compound preparationLithium chlorideGrignard reagent
The invention relates to the technical field of synthesis of pharmaceutical intermediates, in particular to a preparation method of o-fluorobenzaldehyde, comprising the following steps: dissolving propyl formate in anhydrous tetrahydrofuran to obtain solution A; dissolving o-fluorobromobenzene in anhydrous tetrahydrofuran , to obtain solution B; put anhydrous lithium chloride and magnesium into the reaction flask, add anhydrous tetrahydrofuran, heat to slightly boil, drop dibromoethane to initiate the reaction; under reflux, add solution B to the reaction flask; feeding is complete , lower the temperature, and then add solution A dropwise; after feeding, continue the reaction for a period of time; lower the temperature, quench with dilute hydrochloric acid, post-process, and refine by vacuum distillation to obtain o-fluorobenzaldehyde. The method of the present invention forms stable and less active benzylmagnesium lithium chloride by adding lithium chloride when preparing the Grignard reagent; the reaction of propyl formate with it is controllable, and only reacts with a less active benzylmagnesium lithium chloride, so that The reaction stays at the aldehyde stage instead of going further to the alcohol stage.
Owner:SINOPHARM CHEM REAGENT
A kind of preparation method of lithium battery
ActiveCN111146503BImprove performanceHigh viscosityFinal product manufactureCurrent conducting connectionsElectrolytic agentCyclohexene
Owner:攸攸新能源科技(金华)股份有限公司
Solvate crystal of PARP inhibitor and preparation method of solvate crystal
ActiveCN110386939AHigh crystallinityHigh purityOrganic active ingredientsNervous disorderEthyl esterMethyl acetate
The invention discloses a solvate crystal of a PARP inhibitor, a preparation method, a pharmaceutical composition and application. The disclosed solvate crystal of a compound in a formula I includes an ethyl acetate solvate crystal A, an ethyl formate solvate crystal B, a methyl acetate solvate crystal C and an n-propyl formate solvate crystal D.
Owner:SHANGHAI DE NOVO PHARMA
Preparation method of 2-fluorobenzaldehyde
ActiveCN109627154AReduced activityReaction is easy to controlOrganic compound preparationCarbonyl compound preparationLithium chlorideGrignard reagent
The invention relates to the technical field of medical intermediate synthesis, in particular to a preparation method of 2-fluorobenzaldehyde. The method comprises the following steps that propyl formate is dissolved into anhydrous tetrahydrofuran, and a solution A is obtained; 2-bromofluorobenzene is dissolved into anhydrous tetrahydrofuran, and a solution B is obtained; anhydrous lithium chloride and magnesium are put into a reaction flask, anhydrous tetrahydrofuran is added, heating is conducted to micro-boiling, dibromoethane is dropwise added, and a reaction is triggered; under backflow,a solution B is added into the reaction bottle; feeding is finished, cooling is conducted, and the solution A is dropwise added; feeding is finished, and the reaction continues to be conducted for a period of time; cooling is conducted, diluted hydrochloric acid is quenched, aftertreatment is conducted, vacuum distillation refining is conducted, and 1-phenyl-2-butanone is obtained. According to the method, when a Grignard reagent is prepared, astable benzyl magnesium lithium chloride low in activity is formed by adding lithium chloride; a reaction of propyl formate and the benzyl magnesium lithium chloride is controllable, propyl formate only reacts with one benzyl magnesium lithium chloride, and the reaction is stopped at the aldehyde stage but not further goes to the alcohol stage.
Owner:SINOPHARM CHEM REAGENT
Preparation method of sodium salt of pravastatin
ActiveCN101580466BReduce usageLow facility requirementsOrganic compound preparationMetabolism disorderIsopropyl formateSodium salt
The invention discloses a preparation method of sodium salt of pravastatin, which comprises the following steps: adding inorganic alkaline or organic alkaline containing sodium ions as positive ions into organic solution containing the pravastatin until pH is more than 7 and obtaining sodium pravastatin; the organic solution containing the pravastatin comprises the pravastatin and first solvent, wherein the first solvent is selected from one or a plurality of methyl formate, n-propyl formate, isopropyl formate, n-butyl formate, methyl acetate, ethyl acetate, n-propyl acetate, isopropyl acetate, n-butyl acetate, sec-butyl acetate, isobutyl acetate and tert-butyl acetate.
Owner:SHANGHAI TECHWELL BIOPHARMACEUTICALS CO LTD
A kind of toothpaste containing multiple plant extracts and preparation method thereof
ActiveCN110755277BGood antibacterial effectPromote secretionCosmetic preparationsToilet preparationsBiotechnologyBenzoic acid
The invention provides a toothpaste containing various plant extracts, which is composed of cistanche extract, reed root extract, hop extract, apocynum extract, sorbitol, liquid flavor, methylparaben, paraben Propyl formate, polyethylene glycol-400, xanthan gum, titanium dioxide, silicon dioxide, sodium lauryl sulfate, and water, and a preparation method is also provided, adding cistanche extract, hops extract, and Robbie to water Hemp extract, add xanthan gum and stir after heating, add polyethylene glycol-400 and sorbitol and stir, add titanium dioxide, silicon dioxide, sodium lauryl sulfate and reed root extract and stir in vacuum, add methyl hydroxybenzoate The liquid essence solution of ester and propyl p-hydroxybenzoate is stirred in vacuum to obtain toothpaste containing various plant extracts. Compared with the currently used chemical fungicides with potential safety concerns, the natural plant extract used in the present invention has the active ingredient of a plant-derived natural product, which is safe to use, has no side effects and has obvious effects.
Owner:新疆维吾尔自治区中药民族药研究所
Lithium battery electrolyte
ActiveCN111146503AImprove performanceHigh viscosityFinal product manufactureCurrent conducting connectionsElectrolytic agentOrganosolv
The invention belongs to the technical field of lithium batteries, and particularly relates to a lithium battery electrolyte. The lithium battery electrolyte comprises a lithium salt, an organic solvent, organic free radicals and an additive, wherein the organic solvent is prepared from the following raw materials in parts by mass: 20-22 parts of ethyl formate, 10-12 parts of propyl formate, 18-20parts of methyl acetate, 30-35 parts of propyl acetate and 11-22 parts of ethylene carbonate; the lithium salt is lithium tetrafluoroborate; the additive is prepared from the following raw materialsin parts by mass: 30-40 parts of vinylene carbonate, 20-35 parts of fluoroethylene carbonate and basically 20-25 parts of cyclohexane; the annular battery comprises an annular barrel, a sealing coverand a negative pole; the negative pole is fixedly connected to the middle part in the annular barrel through insulating rubber; a cathode ring is fixedly connected into the annular barrel; the cathodering is fixedly connected into the annular barrel through insulating rubber, and the cathode ring is the cathode of the annular battery; the negative pole is the negative pole of the annular battery;and a diaphragm is arranged in the cathode ring. The battery is low in loss and long in service life, and the electrolyte is convenient and rapid to replace.
Owner:攸攸新能源科技金华有限公司
Rapid-hardening underground pipeline grouting repair polymer and preparing method
The present invention provides a rapid-hardening underground pipeline grouting repair polymer and a preparing method thereof for underground pipes. The rapid-hardening underground pipeline grouting repair polymer comprises the base resin and the hardener, weight ratio of which is 2:1-1:1. The base resin comprises 50 to 160 parts by weight of an isocyanate; 20 to 100 parts of a chlorophosphate mixture with a density over 1400 kg / m3; a parts by weight ratio of the isocyanate and chlorophosphate is 1:1-4:1. The hardener comprises 30 to 60 parts by weight of a chlorophosphate mixture with a density over 1400 kg / m3, 5 to 15 parts of a propyl formate, a methyl propionate or a mixture of a propyl formate and a methyl propionate, 15 to 55 parts of a polyol, 1 to 3 parts of a surfactant, 2 to 6 parts of a catalyst, 0 to 0.5 parts of water and 0 to 1 parts of a colorant.
Owner:INFRASTRUCTURE RENEWAL INST OF SOUTHERN CHINA
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com