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81 results about "Phenyl acetate" patented technology
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Phenyl acetate is the ester of phenol and acetyl chloride. One way that it can be produced by decarboxylation of aspirin. Another way that it can be produced is by reacting phenol with acetic anhydride.
Oral Care Compositions With Improved Flavor
Oral care compositions having improved taste, said compositions comprising: a carrier material; from about 0.001 to about 10%, by weight of the composition, of an oral care component selected from metal salts, antimicrobial agents, bad breath reduction agents, bleaching agents, surfactants, or a combination thereof; and from about 0.0001 to about 1%, by weight of the composition, of a TRPA1 agonist selected from vanillin esters; benzoate esters; hydroxybenzoate derivatives; methoxy benzoate derivatives; hydroxybutanedioate derivatives; benzamidobenzoate derivatives; methylpropanoate derivatives; phenyl acetate derivatives; hex-3-enoate derivatives; 2-(furan-2-ylmethylsulfanyl)-3-methylpyrazine; phenylmethoxymethylbenzene; (2R)-2-azaniumyl-3-[(2R)-2-azaniumyl-3-oxido-3-oxopropyl]disulfanylpropanoate; (3E)-2-hydroxy-4,8-dimethylnona-3,7-dienal; (2R)-2-azaniumyl-3-[(2S)-2-azaniumyl-3-oxido-3-oxopropyl]disulfanylpropanoate; (3Z)-3-butylidene-2-benzofuran-1-one; 3-methyl-N-(3-methylbutyl)butan-1-imine; 2-(furan-2-ylmethyldisulfanylmethyl)furan; and combinations thereof. Uses thereof and methods of improving the taste of an oral care composition.
Owner:THE PROCTER & GAMBLE COMPANY
L-ornithine phenyl acetate and methods of making thereof
Disclosed herein are crystalline forms of L-ornithine phenyl acetate and methods of making the same. The crystalline form may, in some embodiments, be Forms I, II, III and V, or mixtures thereof. The crystalline forms may be formulated for treating subjects with liver disorders, such as hepatic encephalopathy. Accordingly, some embodiments include formulations and methods of administering L-ornithine phenyl acetate.
Owner:OCERA THERAPEUTICS INC
Patterning process
ActiveUS20120009529A1High dissolution contrastIncrease contrastPhotomechanical exposure apparatusMicrolithography exposure apparatusResistMeth-
A pattern is formed by applying a resist composition comprising a (meth)acrylate copolymer comprising both recurring units having an acid labile group-substituted carboxyl group and recurring units having a lactone ring, an acid generator, and an organic solvent onto a substrate, prebaking the composition to form a resist film, exposing the resist film to high-energy radiation, baking, and developing the exposed film with a developer. The developer comprises at least 40 wt % of an organic solvent selected from methyl benzoate, ethyl benzoate, phenyl acetate, benzyl acetate, methyl phenylacetate, benzyl formate, phenylethyl formate, methyl 3-phenylpropionate, benzyl propionate, ethyl phenylacetate, and 2-phenylethyl acetate.
Owner:SHIN ETSU CHEM IND CO LTD
Multifunctional synergist of compound fertilizer
The invention relates to the technical field of agricultural fertilizer, particularly to a multifunctional synergist of a compound fertilizer suitable for calcareous soil of dry land, and application of the multifunctional synergist. The synergist is composed of, in percentage by mass, 40-70% of super-absorbent resin, 15-25% of citric acid and the salts thereof, 10-20% of a nitrification inhibitor, 4-10% of polyborate and 1-5% of EDDHA (ethylenediamine di-o-phenyl acetate)-microelement chelate. The synergist prepared according to the invention can be used as an additive of a compound fertilizer or applied together with various common compound fertilizers or formula fertilizers to exert the function of preventing and controlling the loss ways of nitrogen, phosphorus and potassium simultaneously, and can realize one-time total-nutrient fertilizer application; and the synergist has multiple functions of stabilizing fertilizer by slow release, holding water and resisting drought, improving soil with nutrients, saving labour, increasing production, etc.
Owner:SHIKEFENG CHEM IND
Catalyzing method of synthesizing diphenyl carbonate through ester exchange reaction
InactiveCN101774911AHigh catalytic activityEasy to separateChemical recyclingPreparation from organic carbonatesMethyl carbonateReaction temperature
The invention discloses a multi-phase catalyzing method of synthesizing diphenyl carbonate (DPC) through ester exchange reaction by using phenyl acetate (PA) and dimethyl carbonate (DMC) as raw materials. A catalyst used in the reaction is an oxide of VIB group elements Mo and W, the catalysis reaction temperature is between 150 and 200 DEG C, and the reaction time is between 4 and 8 hours. The invention has the advantages of simple preparation method of the catalyst, easy acquisition of raw materials, no environment pollution and no corrosion on equipment, the used catalyst can be easily separated, recovered, regenerated and used repeatedly, the consumption of the catalyst in the catalysis reaction is little, the total selectivity on products of methyl phenyl carbonate (MPC) and diphenyl carbonate (DPC) can reach more than 95 percent, and the conversion rate of the diphenyl carbonate (DPC) is about 75 percent, so the catalyst system can be widely used for producing the diphenyl carbonate (DPC).
Owner:CHANGZHOU INST OF CHEM
Method for preparing p-hydroxy phenyl ethyl ketone compound through rearrangement reaction under catalysis of acidic ionic liquid
ActiveCN103360225AImprove stabilityHigh catalytic activityOrganic compound preparationCarbonyl compound preparationOrganic solventOligomer
The invention provides a method for preparing a p-hydroxy phenyl ethyl ketone compound through Fries rearrangement reaction under catalysis of an acidic ionic liquid. The method comprises the following steps of: directly adding phenyl acetate to the ionic liquid, wherein the dosage of the ionic liquid is 10%-40% of the mole number of oligomers; next, reacting for 12-18 hours at a temperature ranging from 60 to 120 DEG C, thus obtaining p-hydroxy phenyl ethyl ketone without o-hydroxy phenyl ethyl ketone type product through extraction, drying and reduced pressure distillation. The ionic liquid applied to the method is used as a solvent and a catalyst, and is high in catalytic activity and selectivity; the dosage of the catalyst is low and the reaction yield is high; the use of other organic solvent and toxic catalyst is reduced, so that the corrosivity of the catalyst to equipment is reduced; the aftertreatment is simple and convenient.
Owner:DALIAN UNIV
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
L-ornithine phenyl acetate and methods of making thereof
ActiveCN102421432AOrganic active ingredientsOrganic compound preparationPhenyl acetic acidOrnithine phenylacetate
Disclosed herein are crystalline forms of L-ornithine phenyl acetate and methods of making the same. The crystalline form may, in some embodiments, be Forms I, II, III and V, or mixtures thereof. The crystalline forms may be formulated for treating subjects with liver disorders, such as hepatic encephalopathy. Accordingly, some embodiments include formulations and methods of administering L-ornithine phenyl acetate.
Owner:OCERA THERAPEUTICS INC
Preparation method of p-hydroxystyrene and derivates thereof
ActiveCN102001918AHigh yieldReduce odorOrganic compound preparationOrganic-compounds/hydrides/coordination-complexes catalysts4-MethylpyridineOrganic synthesis
The invention relates to the field of organic synthesis, in particular to a preparation method of p-hydroxystyrene and derivates thereof. The preparation method is as follows: preparing p-hydroxycinnamic acid; preparing the p-hydroxystyrene; and finally preparing 4-vinyl phenyl acetate or 4-tert-butoxycarbonyloxystyrene. In the preparation process of the p-hydroxycinnamic acid, 4-picoline replaces pyridine to serve as a reaction catalyst, the yield of the p-hydroxycinnamic acid is improved to about 95%, and the problems of odor of pyridine and low recovery rate are alleviated. Cyclohexane is used as an extraction solvent to extract the p-hydroxystyrene derivate from a reaction liquid, and the residue of the solvent in the product is greatly reduced. The traditional synthetic route of the 4-tert-butoxycarbonyloxystyrene is changed, and the Witting reaction with rigorous conditions is avoided; and meanwhile the complex separation and purification problems such as column chromatography are simplified, and the yield is about 80% which is higher than that of current reports.
Owner:五莲县计量检测服务中心
Method for synthesizing alpha-chlorine (2-chlorine) methyl phenyl acetate
ActiveCN101434540AHigh yieldHigh purityOrganic compound preparationCarboxylic acid esters preparationChemical synthesisMethyl o-chloromandelate
The invention relates to a synthetic method of Alpha-chloro-(2-chloro) methyl phenyl acetate, pertaining to the field of chemical synthesis. The technical problem to be solved by the invention is that a high-purity synthetic method of the Alpha-chloro-(2-chloro) methyl phenyl acetate with high purity is provided. The technical proposal comprises the steps as follows: pyridine is tanken as a solvent, and O-chloro mandelic acid methyl ester reacts with thionyl chloride under the condition of 25 DEG C to 80 DEG C for 0.5h to 5h, and then filtered. Filtrate is extracted by water for impurity removal, and anhydrous sodium sulfate is added for removing water. Filtering is carried out for removing solid sodium sulfate and the filtrate is depressurized for distilling off the solvent to obtain the Alpha-chloro-(2-chloro) methyl phenyl acetate. The reaction formula is shown as the formula in upper right side.
Owner:重庆莱美隆宇药业有限公司
Cathode electrochromic compound for electrochromic device
InactiveCN106928129AGood electrochemical reversibilityFast discolorationOrganic chemistryTenebresent compositionsTetrafluoroborateTriflic acid
An electrochromic medium comprises a cathode electrochromic compound, wherein the structural formula of the cathode electrochromic compound is as shown in the specification, R1 is selected from normal alkyl or heterogeneous alkyl containing 1-20 carbon atoms; each of R2-R14 is independently selected from H, alkyl, cycloalkyl, polycyclic alkyl, aryl, heterocyclic alkyl, aromatic alkyl and alkaryl containing 1-50 carbon atoms or alkyl, cycloalkyl, polycyclic alkyl, aryl, heterocyclic alkyl, aromatic alkyl and alkaryl containing 1-50 carbon atoms and halogen, N, O, S, Si, P or unsaturated bond groups; X1<-> is selected from acetate anion, methyl phenyl acetate sulfonate anion, tetrafluoroborate anion, hexafluoroborate anion, tetraphenyl borate anion, trifluoro mesylate anion, perchlorate anion, bis-oxalate borate anion, oxalate difluoroborate anion, bis(trifluoromesyl) imide anion and tri(trifluoromesyl) methyl anion. The cathode electrochromic compound has the advantages that good electrochemical reversibility is achieved, fast color changing and good stability are achieved, the lowest value of visible light transmittance is small, and the like.
Owner:NINGBO MI RUO ELECTRONICS TECH CO LTD
Technical method for synthesizing beta p-hydroxy phenethyl alcohol
InactiveCN1915949AWide variety of sourcesShort synthetic routeOrganic chemistryOrganic compound preparationAcetic anhydridePhenethyl alcohol
This invention discloses a method for synthesizing beta-p-hydroxyphenylethanol from phenol and acetic anhydride by esterification, halogen-alkylation and hydrolysis. Since the O atom on phenolic hydroxyl has a high electronegativity, it is easily subjected to alkylation reaction. To avoid the reaction, esterification is employed to preotect the O atom and phenyl acetate. Then 1,2-dihaloethylene is added on the benzene ring of phenyl acetate to obtain (4-beta-haloethyl)phenyl acetate. The protection groups are removed by hydrolysis to obtain beta-p-hydroxyphenylethanol. The method has such advantages as short synthesis route, mild reaction conditions, high efficiency, high yield (up to 93%), and abundant raw material resources.
Owner:SHENYANG LIGONG UNIV
Organic granular water-soluble fertilizer and preparation method thereof
InactiveCN107986876AIncrease profitAvoid cloggingMagnesium fertilisersAlkali orthophosphate fertiliserPhosphateWater insoluble
The invention provides organic granular water-soluble fertilizer and a preparation method thereof, and relates to the field of fertilizer. The organic granular water-soluble fertilizer comprises the following components in parts by weight: 65 to 70 percent of ammonium sulfate, 9 to 14 percent of urea, 5 to 10 percent of potassium nitrate, 5 to 6 percent of monoammonium phosphate, 2.5 to 5 percentof potassium fulvic acid, 3 to 4.5 percent of magnesium sulfate, 1.5 to 2 percent of molasses liquid, 0.2 to 1.2 percent of trace element, 0.5 to 5 percent of tripotassium phosphate and 0.5 to 2 percent of ethanediamine sodium dio-phenyl acetate. The organic granular water-soluble fertilizer has rich and balanced nutrition, and can effectively reduce the water-insoluble matter content, rapidly increase the dissolution speed, increase the utilization rate of the fertilizer and avoid blockage of a drop irrigation pipeline.
Owner:崔凯
Improved beta-arbutin preparation method
ActiveCN103524575AReduce dosageHigh yieldSugar derivativesSugar derivatives preparationSodium acetateSodium acetrizoate
The invention provides an improved environment-friendly beta-arbutin synthetic process which comprises the following steps of reacting glucose with acetic anhydride in the presence of sodium acetate in a high-boiling point polar aprotic solvent; after the reaction is finished, extracting by using a low-polarity aprotic solvent, wherein low-polarity aprotic solvent extract liquor is subjected to washing and dewatering treatment and then is directly used for glycosylation reaction with p-hydroxy phenyl acetate; carrying out azeotropic distillation on the raffinate of the high-boiling point polar aprotic solvent to remove acetic acid generated in the reaction, and then complementing the glucose and the acetic anhydride to further carry out the reaction of the next batch of penta-acetyl glucose synthesis. Compared with the traditional process, the new process provided by the invention omits the penta-acetyl glucose purifying procedure and omits the three-waste treatment of a penta-acetyl glucose synthesizing procedure, thereby greatly reducing the raw material cost and increasing the total yield of beta-arbutin.
Owner:HUBEI ARTEC CARBOHYDRATE CHEM +1
Oral care compositions with improved flavor
Owner:PROCTER & GAMBLE CO
Substituted phenyl acetate compound and application thereof
InactiveCN102863353AGood anesthesiaStrong medicineOrganic active ingredientsNervous disorderAnesthetic AgentPropanidid
The invention belongs to the fields of medicine and chemistry, and provides a substituted phenyl acetate compound with the structure shown by formula (I), which has short-acting sedative-hypnotic effect so as to be used for preparing anesthetic and sedative. The experiments prove that the substituted phenyl acetate compound has the anesthetic activity stronger than that of propanidid, and has the action time and the recovery time which are shorter and more foreseeable than those of propofol, thus having the characteristics of being high in anesthetic effect and medicine effect, low in toxic and side effects and the like.
Owner:HUAZHONG UNIV OF SCI & TECH
Method for preparing diphenyl carbonate through transesterification
InactiveCN105272856AGood choiceHigh activityMetal/metal-oxides/metal-hydroxide catalystsPreparation from organic carbonatesPhenylacetatesReaction temperature
The invention relates to a method for preparing diphenyl carbonate through transesterification. With prior arts, heterogeneous catalyst activity and selectivity are low, and the catalyst is prone to inactivation. The invention mainly aims at solving the above problems. According to the invention, dimethyl carbonate and phenyl acetate are adopted as raw material, and contact a catalyst for 1-20h under a reaction temperature of 120-190 DEG C, wherein a molar ratio of dimethyl carbonate to phenyl acetate is 0.1-5, and a weight ratio of the catalyst to phenyl acetate is 0.01-0.5. With the above reaction, diphenyl carbonate is produced. The catalyst is a binary mixed metal oxide AaOb / BcOd, wherein A is Sn, Mn or Bi; and B is Al, Ga, Fe, In, Zr or Cr. With the technical scheme, the problems are well solved. The method can be used in industrial productions for preparing diphenyl carbonate through the transesterification reaction of dimethyl carbonate and phenyl acetate.
Owner:CHINA PETROLEUM & CHEM CORP +1
Synthesis method of natural product of E-2,3',4,5'-tetrahydroxy diphenyl ethylene
ActiveCN106748662ASimple stepsNo protectiveOxygen-containing compound preparationOrganic compound preparationSynthesis methodsBenzaldehyde
The invention discloses a synthesis method of a natural product of E-2,3',4,5'-tetrahydroxy diphenyl ethylene. According to the method, 1,3-acetone dicarboxylic acid dimethyl ester is used as a starting raw material; condensation and aromatization reactions are performed to obtain 3,5-dihydroxy-2,4-dicarboxylate methyl phenyl acetate; then, hydrolysis and decarboxylation are performed to obtain 3,5-dyhydroxy phenylacetic acid; the 3,5-dyhydroxy phenylacetic acid and 2,4-dihydroxy benzaldehyde take condensation reaction under the existence of alkali to obtain 3-(3,5-dihydroxy phenyl)-7-hydroxy coumarin; next, open loop decarboxylation reaction is performed under the alkaline condition; the natural product of E-2,3',4,5'-tetrahydroxy diphenyl ethylene is obtained. The method has the advantages that the raw materials are easily obtained; the reaction route is simple and fast; the operation is convenient; the yield is higher.
Owner:GUANGZHOU ZHONGDA NANSHA TECH INNOVATION IND PARK +1
Decoloration-resistant dye auxiliary agent
InactiveCN104727167AQuality improvementImprove dyeing effectDyeing processPolyethylene glycolPhenyl acetate
The invention discloses a decoloration-resistant dye auxiliary agent. The decoloration-resistant dye auxiliary agent is prepared via mixing of, by weight, 15 to 20 parts of AES, 6 to 10 parts of starch transaminase, 6 to 10 parts of dimethyl phenyl acetate, 3 to 5 parts of an AES mate thickening agent, 20 to 30 parts of polyethylene glycol, 3 to 5 parts of Lamepon, 8 to 12 parts of sodium octadecylbenzenesulphonate. 2 to 3 parts of sodium oleate, 1 to 2 parts of a cation agglomerate, and 40 to 60 parts of water. In production processes of gradient dye, the decoloration-resistant dye auxiliary agent is capable of removing impurities in dye effectively, improving quality and dyeing effect of the gradient dye, and preventing decoloration.
Owner:JIANGSU ZHONGHAI HEAVY MACHINE TOOL
A kind of synthetic method of natural product e-2,3',4,5'-tetrahydroxystilbene
ActiveCN106748662BSimple stepsGood atom economyOxygen-containing compound preparationOrganic compound preparationSynthesis methodsPhenylacetic acid
Owner:GUANGZHOU ZHONGDA NANSHA TECH INNOVATION IND PARK +1
Technical method for synthesizing beta p-hydroxy phenethyl alcohol
InactiveCN100432035CWide variety of sourcesShort synthetic routeOrganic chemistryOrganic compound preparationAcetic anhydridePhenethyl alcohol
This invention discloses a method for synthesizing beta-p-hydroxyphenylethanol from phenol and acetic anhydride by esterification, halogen-alkylation and hydrolysis. Since the O atom on phenolic hydroxyl has a high electronegativity, it is easily subjected to alkylation reaction. To avoid the reaction, esterification is employed to preotect the O atom and phenyl acetate. Then 1,2-dihaloethylene is added on the benzene ring of phenyl acetate to obtain (4-beta-haloethyl)phenyl acetate. The protection groups are removed by hydrolysis to obtain beta-p-hydroxyphenylethanol. The method has such advantages as short synthesis route, mild reaction conditions, high efficiency, high yield (up to 93%), and abundant raw material resources.
Owner:SHENYANG LIGONG UNIV
Methods of making L-ornithine phenyl acetate
ActiveCN103502203AOrganic active ingredientsOrganic compound preparationOrnithine synthesisL-Ornithine
Disclosed herein are processes for making L-ornithine phenyl acetate. The process may include, for example, inter-mixing a halide salt of L-ornithine with silver phenyl acetate. The process may also include forming a phenyl acetate salt in situ. The present application also relates to various compositions obtained from these processes, including crystalline forms.
Owner:OCERA THERAPEUTICS INC
Moisture-proof aging-resistant cable material and preparation method thereof
InactiveCN108084589AHigh mechanical strengthImprove flame retardant performancePlastic/resin/waxes insulatorsCellulose acetateAluminium hydroxide
The invention discloses a moisture-proof aging-resistant cable material. The moisture-proof aging-resistant cable material comprises the following raw materials in parts by weight: The moisture-proofaging-resistant cable material comprises the following raw materials in parts by weight: 22-36 parts of polyvinyl chloride resin, 9-16 parts of nitrile rubber, 15-20 parts of neopentyl glycol diacrylate, 4-8 parts of nano zinc oxide, 2-4 parts of glass fiber, 2-3 parts of triallyl isocyanurate, 7-9 parts of gamma-methyl allyl oxopropyl trimethoxysilane, 0.5-1 part of zinc diethyl dithiocarbamate,1-2 parts of 4-vinyl phenyl acetate, 2-9 parts of alumina borosilicate whisker, 10-15 parts of aluminium hydroxide, 3-6 parts of cellulose acetate, and 10-15 parts of an auxiliary agent. The cable material has high mechanical strength and wide adaptation temperature scope, and has the advantages of high flame retardation, fire resistance, good heat stability, aging resistance, and excellent electrical isolation performance.
Owner:CHENGDU SHANSHUI TIANXIA TECH CO LTD
Preparation method of concrete capable of performing damage self-reporting
The invention discloses a preparation method of concrete capable of performing damage self-reporting. The preparation method comprises the following steps: dissolving PMMA in chloroform; dissolving CVL in phenyl acetate; then putting the materials into a vortex mixer to perform vortex mixing, so as to obtain an oil phase; adding silica sol into distilled water and serving the silica sol as a continuous phase, and then performing vortex mixing on the continuous phase and the oil phase, so as to obtain pre-emulsion; adding a 1M HCl solution into the pre-emulsion, and adjusting the pH of the pre-emulsion to be 8.0; then performing ultrasonic bath in a condition of ice bath cooling, so as to form oil-in-water emulsion; stirring the obtained emulsion in a preheating oil bath at 40 DEG C, so asto evaporate the chloroform and to obtain suspension liquid; cooling the suspension liquid to room temperature, and performing vacuum filtration, so as to obtain microcapsules; adding a microcapsule dispersion system into concrete pulp and stirring, and pouring, so as to obtain the concrete capable of performing damage self-reporting. The preparation method has the advantages that visual sensing and concrete damage monitoring are combined, color changing indicates cracks, the method is intuitive and clear, the sensitivity is high, and the construction difficulty can be reduced.
Owner:SHANDONG UNIV OF SCI & TECH
Biological function materal used in fabric and coating
InactiveCN1554810AWith sterilization and deodorizationWith negative ionsCoatingsArtifical filament manufactureAcetic acidUltraviolet
The biological functional material is used as assistant in fabric and paint. The biological functional material consists of L-lysine 0.3-0.5 wt%, cystine 0.3-0.5 wt%, phenylalamine 0.3-0.5 wt%, phenyl acetate 0.1-0.2 wt%, acetylcholine 0.1 wt%, chitosan 0.6-0.8 wt%, titania 76-80 wt%, silica 13-15 wt% and zinc oxide 5-7 wt%. The technology of the present invention makes fabric possess the functions of sterilizing, deodorizing, resisting electromagnetic wave, resisting static electricity, etc. The technology of the present invention makes paint possess high transparency, high adhesion, sterilizing and deodorizing functions and other advantages.
Owner:RONGDA ELECTROMECHANICAL TECH JILIN PROV
Method for preparation of diphenyl carbonate by ester interchange
ActiveCN105085274AGood choiceHigh activityPreparation from organic carbonatesLow activityReaction temperature
The invention relates to a method for preparation of diphenyl carbonate by ester interchange, and mainly solves the problems that a heterogeneous phase catalyst has low activity and selectivity, and proneness to inactivation. In the invention, dimethyl carbonate and phenyl acetate, whose mol ratio ranges from 0.1 to 5, serve as materials, react in the presence of a catalyst for 1-20 hours at a temperature of 120-190 DEG C to prepare diphenyl carbonate, wherein the weight ratio of the catalyst to the phenyl acetate ranges from 0.01 to 0.5, the catalyst is a mixture of two metal oxides AaOb / BcOd; A is selected from Sn, Mn or Bi, and B is selected from Al, Ga, Fe, In, Zr or Cr. The method for preparation of diphenyl carbonate by ester interchange solves problems well and can be used in ester interchange of dimethyl carbonate and phenyl acetate for preparing diphenyl carbonate.
Owner:CHINA PETROLEUM & CHEM CORP +1
Acidification blocking remover and preparation method thereof
ActiveCN113684012AAchieve cloggingPrevent redepositionDrilling compositionSodium acetatePhenyl acetate
The invention belongs to the technical field of blocking removers, and particularly relates to an acidification blocking remover and a preparation method thereof. The acidification blocking remover comprises a prepad fluid, a main body fluid and a subsequent fluid, wherein the main body fluid is prepared from the following raw materials in parts by weight: hydrochloric acid, fluoboric acid, acetic acid, ammonium fluoride, ammonium bifluoride, sodium nitrite, polyoxyethylene amine, a corrosion inhibitor, an iron ion stabilizer, a penetrant, sodium ethylenediamine di-o-phenyl acetate and water. According to the acidification blocking remover, the prepad fluid, the main body fluid and the subsequent fluid have a synergistic effect, so the blockage of a well entering zone can be removed, the pollution of a far-away-from-well zone can be eliminated, deep acidification of a stratum is realized, and the aim of removing the blockage is fulfilled.
Owner:胜利油田海发环保化工有限责任公司 +1
Scopoletin labeled by stable isotope and synthetic method for scopoletin
ActiveCN105884733AThe synthesis steps are simpleHigh yieldIsotope introduction to heterocyclic compoundsStable Isotope LabelingPhenyl acetate
The invention belongs to the synthesis field of isotope labeled compound synthesis, and particularly relates to scopoletin labeled by stable isotope and a synthetic method for the scopoletin. The synthetic method is characterized in that scopoletin labeled acetylchloride-2-13 C is taken as a raw material, and the scopoletin labeled acetylchloride-2-13C reacts with 2,4-dihydroxyl-5-methoxybenzaldehyde to generate 2-aldehyde-4-methoxy-5-hydroxyl phenyl acetate; under the action of a basic catalyst, scopoletin-2-13C is generated through Perkin reaction. The synthetic method is simple in synthesis step, is gentle in reaction condition, is simple and convenient in operation, is high in product yield being 26% or higher, is capable of effectively synthesizing an isotope labeled coumarin derivative, so that a novel way is provided for synthesizing the isotope labeled coumarin derivative. Certain innovation and unique research significance are achieved on organic synthetic method.
Owner:ZHENGZHOU TOBACCO RES INST OF CNTC +1
Technological method for preparing m-aminophenol
ActiveCN107556201AMild reaction conditionsRaw materials are easy to getOrganic compound preparationAmino-hyroxy compound preparationWater bathsM-aminophenol
The invention relates to a technological method for preparing m-aminophenol, belongs to the technical field of chemical material preparation and solves the technical problem of limit caused by utilizing phenyl acetate as a preparation raw material. The technological method disclosed by the invention has the advantages of simpleness in operation, high product yield, reaction easy to control and thelike. The technological method is characterized by comprising the steps: preparing 3-carboxyphenyl phenyl acetate after preparing m-cresyl acetate and utilizing the prepared 3-carboxyphenyl phenyl acetate to prepare the m-aminophenol. The technological method comprises the steps: a, taking a C9H8O4 solvent, adding into an ethyl acetate solution, fully stirring until complete dissolution, dropwiseadding thionyl chloride into a system under the ice water bath condition, thermally insulating 1+ / -0.5 hours, warming to 60 DEG C and refluxing; b, under the ice water bath condition, adding triethylamine and hydroxylamine hydrochloride into the system, thermally insulating for 2 hours and warming to a room temperature; c, spin drying the solvent on a rotary evaporator, then adding water and potassium carbonate, warming to 60 to 70 DEG C and hydrolyzing; d, utilizing ethyl acetate to extract the solution, utilizing a thin-layer chromatography to determine whether extraction is complete and obtaining the finished product of the m-aminophenol after the extraction is finished.
Owner:山西智创药研科技有限公司
Synthetic method of methyl (ethyl) phenyl acetate
InactiveCN101973880AOperational securitySimple and fast operationOrganic compound preparationCarboxylic acid esters preparationIce waterGrignard reagent
The invention discloses a synthetic method of methyl (ethyl) phenyl acetate, characterized by using benzyl chloride as a main raw material and adding and hydrolyzing a Grignard reagent and methyl carbonate to obtain a product. The invention adopts the technical scheme comprising the following steps of: adding 24g of magnesium, 300 ml of aether and 10g of benzyl chloride to a three-neck bottle of 2000 ml; starting to stir for 10 min; dropping 120g of benzyl chloride with a drop funnel; controlling the micro-refluxing state temperature of the aether; and adding the Grignard reagent and the methyl carbonate, and adding 600g of ice water to hydrolyze to obtain a product. The invention has the advantages that the process of the invention avoids using virulent sodium cyanide and has safe, simple and convenient operation, higher product quality and lower cost.
Owner:杨亮
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