87 results about "3-Pentanone" patented technology

A photoimagable composition suitable for use as a negative photoresist comprising: (A) at least one epoxidized polyfunctional bisphenol A formaldehyde novolak resin; (B) at least one polycaprolactone polyol reactive diluent, wherein the amount of component (A) is from about 95% to about 75% by weight of the sum of (A) and (B) and the amount of component (B) is from about 5% to about 25% by weight of the sum of (A) and (B); (C) at least one photoacid generator in an amount from about 2.5 to about 12.5 parts per hundred parts of resin and reactive diluent, which initiates polymerization upon exposure to actinic radiation; and (D) a sufficient amount of solvent to dissolve (A), (B) and (C); wherein the solvent comprises 2-pentanone, 3-pentanone, and 1,3-dioxolane and mixtures thereof.

Disclosed herein are refrigerant and heat transfer fluid compositions comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and at least one hydrofluorocarbon for use in refrigeration and air conditioning systems employing a centrifugal compressor. The compositions may be azeotropic or near-azeotropic.

The present invention relates to compositions for use in refrigeration and air conditioning systems comprising 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone and at least one chlorocarbon, alcohol, ketone, ether, ester, N-(difluoromethyl)-N,N-dimethylamine, 1,1,1,2,2-pentafluoro-2-[(pentafluoroethyl)thio]ethane or mixtures thereof, and which are also useful in systems employing a centrifugal compressor The compositions of the present invention may be azeotropic or near azeotropic and are useful in processes for producing refrigeration or heat or as heat transfer fluids.

A preparation method for aviation kerosene is disclosed, and relates to a new route for synthesizing a liquid-state branched paraffin fuel under effect of a cheap catalyst by taking lignocelluloses-based platform compound completely no depending on fossil energy as a raw material. The liquid-state fuel obtained through the route can be used as an aviation kerosene (or diesel oil) substitute or an additive for improving fuel cetane value and cold resistance. The method is divided into two parts, and concretely comprises 1) a lignocelluloses-base furfural compound (comprising furfural, methylfurfural or 5-hydroxymethylfurfural) and a carboxyl-containing compound (comprising 3-pentanone, 5-nonanone and the like) are subjected to an aldol condensation reaction under the effect of a base catalyst for synthesizing an oxygen-containing organic compound with the carbon chain length of 8-16; and 2) the aldol condensation product is subjected to direct oxidative dehydrogenation under the effect of a non-noble metal catalyst for obtaining biomass aviation kerosene branched-chain hydrocarbons which possesses the carbon chain length of 8-16 and possesses relatively high energy density, stability and relatively low freezing point.

The present invention relates, in part, to azeotrope and azeotrope-like mixtures consisting essentially of consisting essentially of cis-1-chloro-3,3,3-trifluoropropene and a second component selected from the group water, hexane, HFC-365mfc, and perfluoro(2-methyl-3-pentanone).

In order to solve the problem that in the prior art, electrolyte cannot simultaneously realize the electrochemical performance such as flame retardant performance and circulation cycle, the inventionprovides lithium ion battery electrolyte. The lithium ion battery electrolyte is prepared from lithium salt, an organic solvent and additives, wherein the additives include a phosphonitrile compound and perfluoro(2-methyl-3-pentanone). The lithium ion battery electrolyte provided by the invention has good cycle performance and flame retardant safety; a lithium ion battery using the electrolyte hasstable cycle performance at normal temperature and 45 DEG C; air expansion cannot occur when the lithium ion battery is stored in a 60-DEG C heat box; the internal resistance is small; good storage performance and cycle performance are maintained.

The invention relates to a catalyst for synthesizing 3-pentanone, and belongs to the technical field of preparation of catalysts for fine chemical products. The catalyst consists of an active composition, an auxiliary agent and a carrier, wherein the active composition is one or more of lanthanum rare earth oxide and actinium rare earth oxide; the carrier is one or more of zirconia, alumina, titania and silicon dioxide; the weight ratio of the active composition to the carrier is 5-80:95-20; and the auxiliary agent is one or more alkali metals or alkaline earth oxides and is 0.1 to 5 weight percent of the total weight of the active composition and the carrier. The catalyst not only maintains the activity of the prior catalyst, but also overcomes the defects of the prior rare earth catalyst, achieves the aims of inhibiting the isomerization reaction and reducing the content of 2-pentanone and methyl isopropyl ketone in the reaction products, and greatly reduces the separation difficulty of the 3-pentanone.

The invention discloses a process for preparing 1-(4-chlorphenyl)-4,4-dimethyl-3-pentanone. The process is characterized by comprising the following steps: 1, preparing ketene, namely condensing p-chlorobenzaldehyde and pinacolin under the temperature of 70 DEG C by taking methanol as a solvent and taking sodium hydroxide as a catalyst to prepare the ketene; and 2, preparing pentanone, namely dissolving the ketene in methanol, adding the catalyst of sodium hydroxide, introducing hydrogen for hydrogenation under the temperature of 50-80 DEG C to prepare pentanone. The process has the beneficial effects that sodium hydroxide serves as the catalyst and methanol serves as the solvent in the ketene preparation process, so that the side reaction is effectively reduced, the content of the ketene is improved, and the reaction time is greatly shortened; and moreover, sodium hydroxide serves as the catalyst in the pentanone preparation process, so that the problems that the precious metal serves as the hydrogenation catalyst and the hydrogenation is incomplete in the prior art are effectively solved, the production cost is greatly reduced, and the hydrogenation conversion rate is over 99.2 percent.

The invention discloses a preparation method of a 1,3-isoquinoline dione derivative. The preparation method is characterized by comprising steps as follows: (1), N-methyl-N-isobutylene acyl benzamide and methane sulfonic acid are added to acetone, 2-butanone or 3-pentanone respectively, TBHP (tert-butyl hydroperoxide) is added while stirring is performed at the room temperature, and a mixed system reacts for 2 hours at certain temperature; (2), after a reaction ends, water is added for quenching, the mixture is extracted with 20 mL of ethyl acetate twice and washed with a saturated salt solution once, and ethyl acetate is removed through spin-drying under reduced pressure; (3), the mixture is subjected to column chromatography, and a target product is obtained.

Disclosed herein are 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone compositions for use in refrigeration and air conditioning systems, particularly centrifugal compressor systems. Also disclosed are 1,1,1,2,2,4,5,5,5-nonafluoro-4-(trifluoromethyl)-3-pentanone in combination with fluoroethers, which are azeotropic or near azeotropic.

The invention discloses a synthesis method of tapentadol. The method includes taking 1-dimethylamino-2-methyl-3-pentanone as a starting material, obtaining 3-bromine-N,N-2-trimethylpentyl-1-amine after reduction and halogenation reactions, then performing a coupling reaction with a metal reagent under the catalysis of transition metal to obtain 3-(3-methoxyphenyl)-N,N-2-trimethylpentyl-1-amine, and obtaining the tapentadol after demethylation and resolution. The synthesis method has the advantages that the raw materials are low in cost and easy to obtain, the steps are few, the operation is simple, and the cost can be effectively reduced; highly purified tapentadol can be obtained through the method, and the liquid phase purity and ee value of hydrochloric acid tapentadol obtained after salification can reach above 99%; and the method can be applied to the medical field.

The invention provides a continuous production process of perfluor-2-methyl-3-pentanone. The method specifically comprises the step of carrying out contact with reactants successively by taking hexafluoropropylene as a raw material to obtain a product, wherein the contact means that different materials in a reactor coexist with a time shorter than or equal to 600s. The continuous production process provided by the invention has the advantages of being cheap and easily available in raw material, simple to operate, high in degree of automation, high in synthetic yield, few in byproduct, short inreaction time and the like.

A disclosed synthetic method for bactericide tebuconazole comprises steps of synthesis of 4,4-dimethyl-1-(4-chlorophenyl)-1-penten-3-one, synthesis of 4,4-dimethyl-1-(4-chlorophenyl)-3-pentanone, preparation of 2-[2-(4-chlorophenyl)ethyl]-2-(1,1-dimethylethyl)-oxirane, and synthesis of tebuconazole. The synthetic method is mild in reaction and free of by-product during reaction, and the product has the yield of 90.1% and the purity of 99.5%.

The invention discloses a microcapsule fire extinguishing material and a preparation method thereof. The microcapsule fire extinguishing material comprises a capsule wall and a capsule core fire-extinguishing medium coated by the capsule wall, the capsule wall is formed by polymerizing a water phase medium and an oil phase medium, and the microcapsule fire extinguishing material comprises the following components in percentage by mass: 70%-90% of capsule core fire-extinguishing medium, 5%-15% of water phase medium and 5%-15% of oil phase medium, wherein the capsule core fire-extinguishing medium is dodecafluoro-2-methyl-3-pentanone or a homologue of dodecafluoro-2-methyl-3-pentanone, the water phase medium is polyol or polyamine, and the oil phase medium is polyacyl chloride. Compared withthe prior art, the material is simple and easy to install, detection starting is accurate and reliable, fire extinguishing is fast and fire extinguishing efficiency is high.

The invention discloses a composite solid electrolyte membrane as well as a preparation method and application thereof. The preparation method of the composite solid electrolyte membrane comprises thefollowing steps: (1) mixing an organic solvent and a binder to obtain a mixed glue solution; (2) mixing the mixed glue solution with sulfide electrolyte to prepare slurry so as to obtain mixed slurry; and (3) forming the mixed slurry on at least one part of the base membrane to obtain the composite solid electrolyte membrane. In the step (1), the organic solvent is selected from at least one of dichloromethane, tetrahydrofuran, n-hexane, n-heptane, methylbenzene, 2,4-dimethyl-3-pentanone, chlorobenzene, xylene, anisole, cyclohexanone, and 1,3,5-trimethylbenzene, n-decane and methyl formamide.The composite solid electrolyte membrane obtained by the method disclosed by the invention has the advantages of good flexibility, high strength, good toughness, high ionic conductivity and good thermal stability.

The invention relates to a method for preparation of 1,1íõ-spirobiindane or its derivant with the method of dehydration of 1, 5-diaryl-3-pentanone catalyzed and cyclized by heteropoly acid.The said 1,1íõ-spirobiindane or its derivant is obtained by refluxing and dewatering the 5-diaryl-3-pentanone and heteropoly acid in the flow of aromatic hydrocarbon until it is of no water, filtering the heteropoly acid and purifying the mother liquid with a yield rate of 57-91 %. The method is characterized in that it is of easy technology, low cost and slight pollution.

The invention discloses a method for synthesizing key intermediate (S)-4-ethyl-4-hydroxyl-1,7-dihydro-tetrahydro-pyran[3,4-c]pyridine-3,8-one for preparing camptothecine compounds, which is characterized in that the intermediate is synthesized by using a nicotinic acid derivative as raw material and (2R)-1,2-O-isopropylidenedioxy-3-pentanone as a chiral inducing reagent and by the following steps: carrying out the nucleophilic reaction of an intermediate generated by the treating the nicotinic acid derivative with a lithium reagent and the chiral inducing reagent, and treating a resulting lactone compound with diluted hydrochloric acid; reducing the lactone into a glycol compound; protecting the glycol compound; removing N,N'-isopropylidene protecting groups; oxidizing an o-glycol compound into a formyl; oxidizing the formyl into an acid; removing an alcohol protecting group; hydrolyzing an ether to form a hydroxyl; and obtaining the target substance by tautomerism. The method has the advantages of high yield and high stereoselectivity.

The invention provides a method for making N-(1-ethyl propyl)-3,4-dimethylaniline, belonging to the dinitroaniline class pesticide technical field. The method has the characteristics that o-xylene is used as a starting material, which is nitrified under a function of a catalyst to obtain 3,4-dimethyl nitrobenzene, and is hydrogenated, added and re-hydrogenated with 3-pentanone under the function of the catalyst, and then the N-(1-ethyl propyl)-3,4-dimethylaniline is obtained. The content of N-(1-ethyl propyl)-3,4-dimethylaniline is more than or equal to 98 percent; the operation procedure is simplified, and the row material is easy to obtain with low cost, thereby easily and industrially realizing.

The invention provides a preparation method of a triazoie compound and belongs to the technical field of pharmaceutical manufacturing. The preparation method comprises the following steps: a raw material reacts in a ketone reaction solvent at a solvent reflow temperature in the presence of alkali and cuprous iodide, and after reaction, through post-processing, an objective product is obtained; the ketone reaction solvent is acetone, butanone, 3-pentanone or the combination thereof. Through selecting and controlling conditions such as reaction temperature and the like, a product with low content of isomere impurities can be obtained, the method is simple and convenient to operate and is suitable for industrialized production.

The invention discloses a fire extinguishing system based on a perfluoro(2-methyl-3-pentanone) fire fighting agent, and relates to the technical field of fire fighting manufacture. The fire extinguishing system comprises a perfluoro(2-methyl-3-pentanone) storage tank, a dry powder extinguishing agent storage tank, a fine water mist water storage tank, a mixer and a spray head, wherein an outlet isconnected with a first inlet of the mixer through a first pipeline by a first regulating valve, one end of a second pipeline communicates with a first pipeline through a three-way pipe, and the otherend of the second pipeline is connected with a first outer ring inlet of the spray head through a second adjusting valve; an outlet are connected with a second inlet of the mixer through a third pipeline by a third adjusting valve; an outlet is connected with a second outer ring inlet of the spray head through a fourth pipeline through a fourth regulating valve; an outlet is connected with a middle inlet of the spray head through a fifth pipeline; the spray head is used for spraying a powdery fire extinguishing agent in the middle and / or spraying a perfluoro(2-methyl-3-pentanone) fine water mist fire extinguishing agent on the outer ring. The system has the advantage of high safety.

The invention discloses a lithium-ion battery fire extinguishing agent and a preparation method thereof, and belongs to the technical field of fire extinguishing agents. The lithium-ion battery fire extinguishing agent is prepared from the following components in percentage by weight: 10-20% of dodecyl fluoride-2-methyl-3-pentanone, 15-35% of fluorocarbon surfactants, 10-15% of glycol, 1-3% of ethanol, 0.5-3% of polypropylene acid, and the balance of water. The preparation method of the lithium-ion battery fire extinguishing agent is simple and easy to operate, used components have high safety, and damage to environments and human bodies is not prone to being left; and according to the lithium-ion battery fire extinguishing agent, the dodecyl fluoride-2-methyl-3-pentanone and water vapor are gasified by absorbing heat, the temperature of ignition positions is lowered, the re-ignition probability of lithium battery fire disasters is reduced, flame can be effectively coved through cooperation with foam, the problem of contents flying out when a lithium battery burns is solved, the possibility of new ignition point generation is reduced, and the spread of the lithium battery fire disasters is inhibited.

The invention belongs to the technical field of pharmaceutical chemistry, in particular to a new method for preparing anti-platelet aggregation compounds with a structure shown in a general formula I. In the preparation route, cheap and readily available initiative materials, namely methyl alpha-bromo-2-chlorophenylacetate and thiophene-2-ethylamine, replace clopidogrel in the conventional document. Concretely, the methyl alpha-bromo-2-chlorophenylacetate is reacted with the thiophene-2-ethylamine, replace clopidogrel under the catalysis of an acid-catcher to generate an intermediate II; the intermediate II is reacted with hydrazine hydrate, acetone or 3-pentanone to generate an intermediate III; and the intermediate III undergoes cyclization to generate the compounds in the formula I. The method has the advantages of mild reaction conditions, simple and safe operating process, and easy industrial production; and the product has stable quality, high purity and high yield; compared with that of the synthetic process provided by the conventional document, the production cost is greatly reduced; and in the formula I, R refers to methyl or ethyl.

The invention discloses a synthesis method of N-(1-ethyl propyl)-3, 4-dimethylaniline, and the method comprises reaction of 3, 4-dimethyl nitrobenzene, pure hydrogen and 3-pentanone under the joint action of various catalysts at the reaction temperature of 40-55 DEG C and under the pressure reaction of 0.1MP-0.5MP hydrogen. The various catalysts comprise (a) a platinum carbon catalyst; and a (b) phosphoric acid-sodium dihydrogen phosphate acid buffer solution. The one step synthesis method of the N-(1-ethyl propyl)-3, 4-dimethylaniline is low in reaction temperature, short in reaction time and simple in process, the raw material 3, 4-dimethyl nitrobenzene can be completely transformed, and the yield of the product N-(1-ethyl propyl)-3, 4-dimethylaniline under optimized conditions is 99.8%.

The invention provides a method for preparing 3-pentanone and propanal through using H2, CO and ethylene. The method for preparing 3-pentanone and propanal through using H2, CO and ethylene is characterized in that a reaction system is composed of CO, H2, ethylene and a catalyst; the reaction temperature is 80-180DEG C, the reaction pressure is 0.05-8.0MPa, the air speed of a mixed gas comprising CO, H2 and ethylene is 500-5000h<-1>, and the molar ratio of H2 / CO / ethylene is 1 / 1 / 3-3 / 3 / 1; the catalyst is composed of a carrier, a primary active component and an assistant, the carrier is active carbon, the primary active component comprises one or more of cobalt phosphides, and the assistant comprises one or more of metals in alkali metals, such as K, Na and Li, or oxides thereof; and the mixed gas comprising CO, H2 and ethylene can be converted into 3-pentanone and propanal in a high activity and high selectivity manner under the action of the catalyst.

The invention discloses a method for separating and purifying dicarboxylic acid in a DBA waste fluid. The method comprises the following extraction steps (I): (i) utilizing an organic phase to extract the dicarboxylic acid in the DBA waste fluid, wherein the organic phase is one or more of alcohol, ketone, ether, ester and amine, and the alcohol is one or more of n-amyl alcohol, sec-octyl alcohol, hexyl alcohol, cyclohexanol and decyl alcohol; the ketone is one or more of methyl ethyl ketone, 3-pentanone, methyl isobutyl ketone (MIBK), 3-octanone and cyclohexanone; the ethers is isopropyl ether; the ester is one or more of P204, P507 and TBP; and the amine is one or more of TOA, N235 and N,N-di-n-butyl valeramide; and (ii) separating the loaded organic phase and an extraction raffinate. The method is mild in process reaction condition, good in selectivity, low in labor intensity and little in environmental pollution, and is suitable for industrial production.

The invention relates to a dodecafluoro-2-methyl-3-pentanone-containing fire extinguishing agent composition, which comprises 50-65 wt% of dodecafluoro-2-methyl-3-pentanone, 20-30 wt% of 6-fluoro-2-hexanone, 10-30 wt% of unsaturated oil, and 1 wt% of a covering flavoring agent, wherein the unsaturated oil is selected from palmitoleic acid, linolenic acid and ricinoleic acid. The dodecafluoro-2-methyl-3-pentanone-containing fire extinguishing agent composition of the present invention has characteristics of high fire extinguishing efficiency, good environmental protection performance and no toxicity, and can be effectively used for various fire disasters.

The invention discloses a catalyst for preparing 3-pentanol through 3-pentanone hydrogenation. The catalyst comprises a carbon-based carrier and a multi-metal component recorded as M1-M2-M3 / C, wherein M1 is selected from one of Ru, Mn and Ag; M2 is selected from one of Ir, Au and Cu; and M3 is selected from one of La, Ce and Y. The catalyst is applied to the liquid phase 3-pentanone hydrogenation process. The conversion rate of 3-pentanone can be 100 percent within a short time, and the selectivity of the 3-pentanol is 100 percent. The invention also provides a method for preparing the catalyst, and the industrial preparation is easily realized.