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429 results about "Cyclopentanone" patented technology
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Cyclopentanone is the organic compound with the formula (CH₂)₄CO. This cyclic ketone is a colorless volatile liquid.
Method for synthesizing high-density aviation fuel by using cyclopentanone as raw material
ActiveCN104232140AImprove combustion effectIncreased carrying energyLiquid hydrocarbon mixture productionBio-feedstockCarbon numberSolvent free
The invention relates to a synthetic route of a hydrocarbon fuel with high density and high volumetric calorific value by using a lignocelluloses-based platform chemical compound as a raw material and completely independent of fossil energy. A liquid fuel obtained by the method can be used in various aircrafts or used as an additive to raise combustion performance of aviation fuel. The method is divided into two parts: 1) under the promotion action of an acid / base catalyst, cyclopentanone (furfural selective hydrogenation product) is subjected to an aldol self-condensation reaction to synthesize unsaturated organic compounds with C10 and C15 polycyclic structures; and 2) a metal loaded A / X catalyst is used to carry out a one-step hydrodeoxygenation and hydrogenation reaction on products generated from the step 1 under low-temperature solvent-free conditions, so as to obtain polycyclic hydrocarbon fuel with carbon number being 10 and 15. The liquid fuel has high density (C10: 0.92g / cm<3>; C15: 1.12g / cm<3>), can be used to effectively raise carrying energy of an aircraft and reduce fuel consumption rate, and meets requirements of high navigational speed, large load and long range.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Analog of mono carbonyl structure of curcumin, and usage
This invention relates to curcumin analogs and their applications. Curcumin is an excellent precursor compound, and has multiple pharmaceutical activities. The curcumin analogs in this invention have more stable monocarbonyl intermediate connection chain structure. The connection chain can be acetone, cyclopentanone or cyclohexanone. The substituent on benzene ring can be separately selected from H, hydroxyl, halogen, alkoxyl, alkyl, halogenated alkyl, amino, and alkyl amino. This invention also discloses pharmaceutically acceptable salts of the curcumin analogs, preparations containing them, and their pharmaceutical applications. Experiments show that the curcumin analogs can be used to treat inflammation and tumor.
Owner:WENZHOU GUANGCHENG BIOTECH +1
Intermediates for the synthesis of benzindene prostaglandins and preparations thereof
ActiveUS20130053581A1Silicon organic compoundsOrganic compound preparationPhotochemistryProstaglandin
Novel processes for preparing optically active cyclopentanones 1which are useful for the preparation of benzindene Prostaglandins and novel cyclopentanones are provided. The invention also provides novel processes of preparing benzindene Prostaglandins and novel intermediates for benzindene Prostaglandins.
Owner:CHIROGATE INT
N-doped porous carbon supported metal catalyst, and preparation method and application thereof
ActiveCN106622327ARich pore structureLarge specific surface areaPhysical/chemical process catalystsPreparation from heterocyclic compoundsHydrogenAlcohol
The invention relates to a catalyst which using N-doped porous carbon as a carrier to support metal. The catalyst is composed of 0.1wt%-30wt% of metal particles and 70wt%-99.9wt% of bio-N-doped porous carbon carrier, and can be used for catalyzing aqueous phase hydrogenation of bio-furfural to highly selectively prepare furfural alcohol or cyclopentanone. The catalyst uses the raw materials which are renewable resources, wide in distribution, green and environmental, simple and easy to obtain, rich in resource, low in cost, free from inactivation when recycled for more than 50 times, and stable to air, water and heat. For example, in reaction of catalyzing the hydrogenation of the furfural to prepare the furfural alcohol, conversion rate of the supported metal catalyst can reach 100% and selectivity of the furfural alcohol is larger than 99% in an aqueous phase system.
Owner:QINGDAO INST OF BIOENERGY & BIOPROCESS TECH CHINESE ACADEMY OF SCI +1
Method for catalyzing cyclone oxide to synthesizing lactone by using nano magnesium-base catalyst
InactiveCN101186601AHigh catalytic activityHigh selectivityPhysical/chemical process catalystsOrganic chemistryCyclohexanoneCatalytic oxidation
The invention relates to chemical technical field, in particular to a method for using magnesia catalyst to catalyze and oxidize cyclone to synthesize lactone. The invention uses some nanometer sheet magnesia compound as catalyst, uses mixture of cyanobenzene and 1, 4-dioxane at a certain proportion as solvent, at a special reaction temperature, to catalyze and oxidize cyclone to synthesize lactone compound. The invention uses commercial cyclopentanone, cyclohexanone and adamantaneketone as raw materials, at mild condition, to reach the total yield of lactone compound more than 90%. The invention uses hydrogen dioxide water solution as oxidant, to eliminate the environment pollution of traditional oxidation process as peroxyacid, to realize environment-friend catalysis conversion. The invention has low cost, which can be used for industrialized lactone compound production.
Owner:FUDAN UNIV
Intermediates for the synthesis of benzindene prostaglandins and preparations thereof
Owner:CHIROGATE INT
Method for preparing cyclopentanone and/or cyclopentanol by furfural or furfuryl alcohol
InactiveCN102807483AIncrease productionImprove conversion rateOrganic compound preparationHydroxy compound preparationAlcoholCyclopentanol
The invention provides a method for preparing cyclopentanone and / or cyclopentanol by furfural or furfuryl alcohol. The method includes the following steps of firstly, mixing furfural or furfuryl alcohol with solvent according to proportion; secondly, adding catalyst with hydrogenating function into the mixture in the first step; and thirdly, reacting in the reducing atmosphere to obtain cyclopentanone and / or cyclopentanol. The method for preparing cyclopentanone and / or cyclopentanol by furfural or furfural alcohol is high in yield of the cyclopentanone and / or cyclopentanol, and further, is simple in process, convenient to operate, mild in reaction conditions, no carbon deposition is caused during the whole reaction, the catalyst is low in cost and easy to obtain and can be reused without lowering activity.
Owner:UNIV OF SCI & TECH OF CHINA
Method for preparing supported catalyst for preparing cyclopentanone with furfural through hydrogenation
ActiveCN103111299AHigh catalytic efficiencyReduce usageMetal/metal-oxides/metal-hydroxide catalystsPreparation from heterocyclic compoundsCatalytic effectAdipic acid
The invention discloses a method for preparing a supported catalyst for preparing cyclopentanone with furfural through hydrogenation. An activated carbon nano tube is adopted as a carrier, and loading metal comprises Ni, Cu, Co and Mg. The method for preparing the catalyst adopts a double dropwise adding and coprecipitation method, thus preparing the catalyst with high capacity and improving the catalytic effect of the catalyst; the preparation condition for the catalyst is easy to realize; and the range of raw materials for preparation is wide, precursors of all components are general and the raw materials for preparation can be selected flexibly according to market price. The catalyst prepared by the method has higher catalytic activity, the furfural conversion efficiency is above 96.6%, and the cyclopentanone selectivity is above 95.4%, so that the catalyst can be used for preparing the cyclpentanone with the furfural as a raw material, the problem that cyclopentanone self polymerization is easy to occur so as to generate a material with high boiling point in the process of generation of cyclopentanone by taking adipic acid as a raw material is solved, and the product yield is improved.
Owner:SOUTHEAST UNIV
Method for preparing polymers containing cyclopentanone structures
InactiveUS7087681B2Increase productionElectrolysis componentsElectrolytic organic productionAromatic hydrocarbonOxidizing agent
A method to electrolytically polymerize aromatic hydrocarbons and oxidize cyclopentane structures within the hydrocarbons into cyclopentanone structures is disclosed including a method to electrolyze fluorene in the presence of an ester to produce poly(9-fluorenone). A method to electrolytically oxidize polymers having cyclopentane structures to polymers having cyclopentanone structures is also disclosed including a method to electrolyze poly(fluorene) to produce poly(9-fluorenone). In addition, a method to chemically oxidize polymers containing cyclopentane structures into polymers containing cyclopentanone structures is disclosed, including a method to oxidize poly(fluorene), with a chemically prepared oxidizing agent, to produce poly(9-fluroenone).
Owner:IM&T RES INC
Metallic Nanofiber Ink, Substantially Transparent Conductor, and Fabrication Method
An exemplary printable composition comprises a liquid or gel suspension of a plurality of metallic nanofibers; a first solvent; and a viscosity modifier, resin, or binder. In various embodiments, the metallic nanofibers are between about 10 microns to about 100 microns in length, are between about 10 nm to about 120 nm in diameter, and are typically functionalized with a coating or partial coating of polyvinyl pyrrolidone or a similar compound. An exemplary metallic nanofiber ink which can be printed to produce a substantially transparent conductor comprises a plurality of metallic nanofibers; one or more solvents such as 1-butanol, ethanol, 1-pentanol, n-methylpyrrolidone, cyclohexanone, cyclopentanone, 1-hexanol, acetic acid, cyclohexanol, or mixtures thereof; and a viscosity modifier, resin, or binder such as polyvinyl pyrrolidone or a polyimide, for example.
Owner:NTHDEGREE TECH WORLDWIDE
Metallic Nanowire Ink Composition for a Substantially Transparent Conductor
An exemplary printable composition comprises a liquid or gel suspension of a plurality of metallic nanofibers or nanowires; a first solvent; and a viscosity modifier, resin, or binder. In various embodiments, an exemplary metallic nanowire ink which can be printed to produce a substantially transparent conductor comprises a plurality of metallic nanowires at least partially coated with a first polymer comprising polyvinyl pyrrolidone having a molecular weight less than about 50,000; one or more solvents such as 1-butanol, ethanol, 1-pentanol, n-methylpyrrolidone, cyclohexanone, cyclopentanone, 1-hexanol, acetic acid, cyclohexanol, and mixtures thereof; and a second polymer or polymeric precursor such as polyvinyl pyrrolidone or a polyimide, having a molecular weight greater than about 500,000.
Owner:NTHDEGREE TECH WORLDWIDE
Method for preparing cycloparaffin as aviation kerosene or diesel oil by biomass route
ActiveCN104711021AGood choiceSimple operation processTreatment with hydrotreatment processesHydrocarbon oils treatment productsAlkaneCellulose
The invention relates to a novel cycloparaffin fuel synthesis route which utilizes a platform chemical compound raw material prepared from lignocellulose and is completely independent of fossil energy. The liquid fuel produced by the method can be used as an aviation kerosene or diesel oil substitute or as an additive for improving fuel cetane number and cold resistance so that through the liquid fuel, a degree of dependence on liquid fuel import is reduced. The method comprises that 1, on a novel solid acid catalyst, cyclopentanone and a furan platform chemical compound (such as fura, methyl furan and hydroxyl methyl furan) prepared from lignocellulose are used as raw materials and undergo an acid catalytic alkylation reaction to produce an oxygen-containing organic compound with carbon chain length of 8-21, and 2, the alkylation product is subjected to hydrogenation deoxidation by a metal-solid acid double function catalyst so that the cycloparaffin which has carbon chain length of 8-21, has high energy density and stability and is suitable as biomass aviation kerosene or high-grade diesel oil is obtained.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Method for preparing cyclopentanone by taking biomass resource as raw material
InactiveCN105330523AReduce yieldFew stepsMolecular sieve catalystsChemical industryFixed bedFurfural
The invention belongs to the technical field of biomass conversion utilization, and concretely relates to a method for preparing cyclopentanone by taking biomass resource as a raw material. The method comprises taking furfural coming from biomass as the raw material, taking a hydrogen-containing gas as a reducing agent, and in the presence of a metal supported type catalyst, performing hydrogenation rearrangement reaction in a high-pressure reaction kettle or a fixed bed reactor, so as to obtain cyclopentanone in one step, wherein the carrier of the metal supported type catalyst is selected from Nb2O5, H-ZSM-5 molecular sieve, HY molecular sieve, Fe2O3, ZrO2, Al2O3, SiO2, CeO2, MgO, active carbon, and TiO2 in various crystal forms, the active composition is selected from Au, Pt, Ru, Rh, Pd, Ir, Ni and Cu, and the active composition load capacity is 0.1-5% of the catalyst. The method is mild in reaction technological conditions, and cheap and easily-available in raw materials, is capable of realizing quantitative conversion of furfural to cyclopentanone, and belongs to an environment-friendly green chemical technology.
Owner:FUDAN UNIV
Catalyst for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol and preparation method and application method thereof
ActiveCN105013509AImprove conversion rateNo significant decrease in activityOrganic compound preparationCarbonyl compound preparationAlcoholActive component
The present invention provides a catalyst for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol and a preparation method thereof, the catalyst is a supported catalyst comprising an active ingredient and a carrier; the active component is one or two substance selected from Cu, Ni, Ru, Pd or Pt; the carrier is a magnetic iron oxide with the formula of FeyOx, wherein the ratio y / x is greater than 2 / 3 and less than 1; and the mass of the active ingredient 2. 0 to 10.0% of the carrier mass. The present invention also discloses a method for water phase hydrogenation preparation of cyclopentanone from furfural or furfural alcohol by use of the catalyst. The method has the advantages of simple operating steps and easy controlled operating conditions. The synthesized catalyst has good catalytic effect, high cyclopentanone product selectivity, and magnetic property, a magnet is used to attract the catalyst, separation and recovery of the catalyst are facilitated, and the catalyst has good prospects.
Owner:GUANGZHOU INST OF ENERGY CONVERSION - CHINESE ACAD OF SCI
Preparation method of high-density liquid hydrocarbon fuel
InactiveCN106867565AThe synthetic route is simpleEfficient synthetic routeLiquid hydrocarbon mixture productionBio-feedstockCarbon numberAlkane
The invention relates to a preparation method of high-density liquid hydrocarbon fuel. The method totally comprises two parts: (1) on a first catalyst bed layer of a fixed bed continuous reactor, cyclopentanone (furfural water phase selective hydrogenation products) takes a self aldol condensation (and hydrogenation) reaction under the catalysis effect of acid / alkali catalysts or metal doping solid alkali to obtain oxygen-containing organic compounds with the carbon number being 15 and 10; (2) on a second catalyst bed layer of the fixed bed continuous reactor, the products generated on the first catalyst bed layer take a further hydrodeoxygenation reaction under the conditions of low temperature and no solvent under the catalysis effect of load metal A / X type bifunctional catalysts to obtain polycyclic hydrocarbon fuel with the carbon number being 15 and 10. The high-density liquid fuel (C15 tri-cycloalkane: 0.917 g / cm<3>; C10 bi-cycloalkane: 0.866g / cm<3>) has the advantages that the energy carried by an aircraft can be effectively improved; the engine oil consumption rate is reduced; the requirements of high flight speed, great load and long emitting range can be met.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Non-inflammable non aqueous electrolyte and lithium-ion battery containing the same
InactiveCN1860638AExcellent charge/discharge characteristicsOrganic electrolyte cellsSecondary cells servicing/maintenancePhosphoric Acid EstersHigh concentration
A nonflammable non-aqueous electrolyte that enables enhancing the charge and discharge characteristics of lithium-ion battery; and a lithium-ion battery comprising a positive electrode containing a lithium transition metal oxide capable of occlusion and release of lithium, a negative electrode containing a carbon material capable of occlusion and release of lithium and a nonflammable non-aqueous electrolyte. The nonflammable non-aqueous electrolyte is in particular one comprising an additive of ternary or more-component mixture, a lithium salt of high concentration and a phosphoric ester as main solvent characterized in that the additive of ternary or more-component mixture comprises at least one member selected from among each of three compound groups, namely, compound group (a) consisting of vinylene carbonate compounds, compound group (b) consisting of vinyl acetate compounds, alkylmethyl carbonate compounds and vinylethylene carbonate compounds and compound group (c) consisting of 2-pyrrolidinone compounds, cycloalkyl compounds and cyclopentanone compounds.
Owner:JAPAN AEROSPACE EXPLORATION AGENCY
Preservative compositions
InactiveCN101254157AHave effectHas a cosmetic effectCosmetic preparationsHair cosmeticsEthyl cinnamateBenzaldehyde
Owner:TAKASAGO INTERNATIONAL CORPORATION
Biodegradable polyester composition
Owner:KINGFA SCI & TECH CO LTD +2
Processes and intermediates for the preparations of prostaglandins
ActiveUS20070167641A1Product can be usedGroup 4/14 element organic compoundsFatty acid chemical modificationEnantiomerPhotochemistry
The present invention provides novel processes for the preparation of a cyclopentanone of Formula II and a lactone of Formula I, which are useful in the production of prostaglandins: wherein Z, R2, R3, X1, X2, and are as defined in the specification. The invention also provides novel enantiomerically enriched compounds.
Owner:YEH YU CHIH +1
Preparation method and use of catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural
InactiveCN104069886AHigh crystallinityFacilitated DiffusionMolecular sieve catalystsPreparation from heterocyclic compoundsMolecular sieveReaction rate
The invention discloses a preparation method of a catalyst for preparation of cyclopentanone through hydrogenation of water phase furfural. The preparation method comprises the following steps: firstly, performing in situ synthesis of a hierarchical pore Y-type molecular sieve carrier by using a one-step hydrothermal crystallization process, and then preparing a molecular sieve loaded type catalyst by using a dipping process. The invention further discloses a method for preparing cyclopentanone through hydrogenation of water phase furfural in the presence of the catalyst. The method disclosed by the invention is simple in steps; and operation conditions are easily controlled. The synthesized hierarchical pore Y-type molecular sieve is relatively high in crystallization degree, contains micropores and mesopores, and also is large in specific surface area. The catalyst prepared by using the molecular sieve has a developed hierarchical pore structure to ensure that a reactant is quickly diffused and transferred; carbon deposition is not easily formed on the surface of the catalyst, and meanwhile, the side effects are reduced. Compared with a catalyst prepared by using a conventional molecular sieve, the catalyst has the advantages of remarkably increasing the reaction rate, increasing the yield of a target product, and being or in catalysis effect, and better in industrial prospect.
Owner:SOUTHEAST UNIV
Isosteviol derivant and application thereof
The invention discloses isosteviol derivant and the application thereof, wherein, as shown in formula (I) or formula (II), A is cyclopentane, cyclopentanone, valerolactam, substituted cyclopentane, substituted cyclopentanone or substituted valerolactam; R is alkyl, substituted alkyl, -COOR2 or -COO(CH2)n-O-R4; R2 is alkyl or substituted alkyl; R4 is alkyl acyl, nitryl, heterocyclic acyl, substituted heterocyclic acyl, aromatic acyl or substituted aromatic acyl; and n or m is respectively integral numbers from 1 to 6. The compound has the effects of regulating blood sugar and treating cardiovascular diseases.
Owner:SOUTHEAST UNIV
Method for synthesizing lactone compound by catalytic oxidation of cyclone
InactiveCN101161649AHigh catalytic activityHigh selectivityOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsCyclohexanoneCyclone
The present invention belongs to chemistry technology field, in particular to a method to synthesize lactone compound with cyclone oxide which is an environmental friendly catalyst. The present invention adopts a composite metal oxide MgO / SnO2compound as the catalyst, adopts hydrogen peroxide as the oxidant, and Benzonitrile together with 1,4-bensodioxanes as the solvents, then the cyclone oxide is catalyzed to synthesize the lactone compound in a specific reaction temperature. The present invention uses ketone adamantine, cyclohexanone, and cyclopentanone available in the market, and the yield can be as high as 90 percent in the mild condition. Meanwhile, because of the hydrogen peroxide adopted ad the oxidant, the oxidation methods in prior art is avoided such as peracid, all of which cause environmental problem, and the aim of environmental friendly catalyzing / conversion is accomplished. The present invention is low in price, but has suitability for industrialized production of lactone compound.
Owner:FUDAN UNIV
High purity metconazole and preparation method thereof
The invention discloses high purity metconazole and a preparation method thereof; the preparation is as follows: exocyclic double bond alpha, beta-unsaturated ketone (II) can be obtained by condensation reaction of cyclopentanone and p-chlorobenzaldehyde; then the exocyclic double bond alpha, beta-unsaturated ketone (II) is reacted with a methylation reagent to obtain alpha', alpha'-dimethyl substituted exocyclic double bond alpha, beta unsaturated ketone (III); then in the presence of a catalyst, the alpha', alpha'-dimethyl substituted exocyclic double bond alpha, beta unsaturated ketone (III) is reacted with hydrogen to obtain 2, 2-dimethyl-5-(4-chloro-benzyl) cyclopentanone (IV) with the double bond being reduced; an epoxypropane compound (V) is obtained by Johnson-Corey-Chaykovsky of the reduced product (IV); finally the epoxypropane compound (V) is reacted with 1, 2, 4 - triazole, and then the high purity metconazole (I) can be obtained by recrystallization. The preparing method has the advantages of chip and easy available raw materials, short route, good selectivity, high overall yield and good atom economy, and is very suitable for industrial production.
Owner:SHANGHAI JIAO TONG UNIV +1
2,3,4-Substituted cyclopentanones as therapeutic agents
Disclosed herein are compounds comprising or a pharmaceutically acceptable salt or a prodrug thereof, wherein a dashed line represents the presence or absence of a bond; Y is a carboxylic acid, sulfonic acid, or phosphonic acid functional group; or an amide or ester thereof comprising from 0 to 12 carbon atoms; or Y is hydroxymethyl or an ether thereof comprising from 0 to 12 carbon atoms; or Y is a tetrazolyl functional group; A is —(CH2)6—, cis —CH2—CH═CH—(CH2)3—, or —CH2—C≡C—(CH2)3— wherein 1 or 2 carbons may be substituted with S or O; B is hydrogen, C1-6 hydrocarbyl, CN, CO2H, or —(CH2)mX(CH2)pH, wherein m is at least 1 and the sum of m and p is from 1 to 5; X is S or O; J is H, CH3, or CF3; D is a covalent bond, CH2, O, or S; and E is an aromatic heterobicyclic ring system which may have substituents comprising up to 6 non-hydrogen atoms each. Methods, compositions, and medicaments related thereto are also disclosed.
Owner:ALLERGAN INC
Method of manufacturing image bearing member, image bearing member, and image forming apparatus
InactiveUS20100150606A1Increases filler dispersion propertyLimit settling downElectrographic process apparatusElectrographic processes using charge patternImage formationCarboxylic acid
A method of manufacturing an image bearing member including forming a charge generation layer overlying an electroconductive substrate, forming a charge transport layer overlying the charge generation layer, the charge transport layer including a charge transport material having a molecular weight of from 600 to 900 and a binder resin, and forming a protection layer overlying the charge transport layer by applying a liquid application containing a polymerizable compound having a charge transport structure, a polymerizable compound having no charge transport structure, a filler, a polycarboxylic acid compound, and cyclopentanone and curing the polymerizable compound having a charge transport structure, and the polymerizable compound having no charge transport structure.
Owner:RICOH KK
Ti-V loaded aluminum-pillared montmorillonite heterogeneous catalyst and application thereof
ActiveCN102744056ACarrier raw materials are readily availableHigh activityOrganic chemistryMetal/metal-oxides/metal-hydroxide catalystsAmmonium metavanadateVanadium oxide
The invention discloses a Ti-V loaded aluminum-pillared montmorillonite heterogeneous catalyst which is prepared by using self-made aluminum-pillared montmorillonite as a carrier, respectively using an ethanol solution of titanium tetrachloride and an oxalate solution of ammonium metavanadate as steeping liquor, loading titanium and vanadium oxides into the aluminum-pillared montmorillonite by using an excess impregnation method and drying and roasting the aluminum-pillared montmorillonite. The invention has the following advantages: raw materials are easily available; a preparation method is simple and is easy to operate; and the prepared catalyst has high activity and good stability. When the catalyst is used for a gas-solid phase reaction for synthesis of 2,3-cyclopentenopyridine from the raw materials comprising acrolein, cyclopentanone and ammonia gas, a good effect is obtained, and the catalyst is cheap and has a good development prospect.
Owner:ZHEJIANG UNIV OF TECH
Dentritic pattern compound, preparation method and application
InactiveCN101003516AHigh glass transition temperatureGood electron transport propertiesOrganic chemistryLuminescent compositionsEthanedionePyrazine
This invention discloses three kinds of dentritic compounds based on cyano-substituted phenylquinoxaline, methyl-substituted phenylquinoxaline, and cyano-substituted phenylpyrazine. The preparation method comprises: reacting 4, 4'-dibromo dipheny ethanedione with trimethylsilico acetylene, reacting with tetraphenyl cyclopentanone to obtain a precursor, and reacting with 1, 2-diamino-4, 5-dicyanobenzene, 1, 2-diamino-4, 5-dimethylbenzene and 2, 3-diaminobutanedinitrile, respectively, to obtain corresponding dentritic compounds. The dentritic compounds can be used as luminescent and electron-transfer material to prepare OLED with high luminescent brightness and efficiency.
Owner:INST OF CHEM CHINESE ACAD OF SCI
Method for preparing cyclopentanone through cyclopentanol dehydrogenation
InactiveCN102603506AImprove efficiencyReduce energy consumptionCarbonyl compound preparation by oxidationGas phaseDehydrogenation
The invention relates to a method for preparing cyclopentanone through cyclopentanol dehydrogenation. The method comprises the steps of carrying out catalytic dehydrogenation and rectification reactions on the raw material cyclopentanol so as to directly obtain the high-purity cyclopentanone, wherein the catalytic dehydrogenation temperature is 85-115 DEG C, the system pressure is 100-300mmHg, and granular Raney nickel type metal alloy comprising 53% of Al, 44% of Ni and 3% of Mo is adopted as a catalyst in the dehydrogenation reaction; and the cyclopentanol load WWH of the catalyst is 2-4hr-1. The gas-phase dehydrogenation reaction product directly enters in a rectifying column of which the number of theoretical plates is 45 to be purified and the reflux ratio of the rectifying column is controlled to be (2:1)-(5:1)to ensure that a cyclopentanone product with the purity of more than 99.9% is obtained. Compared with the prior art, the method disclosed by the invention has the advantages that the energy consumption is low; the use efficiency of the catalyst is high; the production cost is greatly reduced; the purity of the obtained cyclopentanone product is more than 99.9%; and a green and environment-friendly production process is provided.
Polyamideimide-based film coating composition
ActiveUS8669305B2High molecular weightReduce coefficient of frictionSynthetic resin layered productsPaper coatingPolyamide-imideFilm-coated tablet
Disclosed is a polyamideimide-based film coating composition free from any restricted substance or a substance which might possibly be a restricted one such as N-methyl pyrrolidone and N-ethyl pyrrolidone and capable of replacing a conventional coating composition using a solvent such as N-methyl pyrrolidone. The polyamideimide-based film coating composition of the present invention is a polyamideimide-based film coating composition comprising a polyamideimide resin and a solvent, the polyamideimide resin being dissolved as a binder in the solvent, wherein the solvent contains γ-butyrolactone and cyclopentanone, and a volume of γ-butyrolactone is 50% by volume or more compared to a total volume of γ-butyrolactone and cyclopentanone.
Owner:VALEO JAPAN CO LTD
Polyimide precursor, polyimide, polyimide film, varnish, and substrate
InactiveCN105814116AImprove performanceHigh transparencyCoatingsPolymer scienceGas liquid chromatographic
This polyimide precursor comprises: a tetracarboxylic acid component including a norbornane-2-spiro-alpha-cyclopentanone-alpha '-spiro-2''-norbornane-5,5'', 6, 6''-tetracarboxylic dianhydride or a derivative thereof; and a diamine component including diamine or a derivative thereof. The polymide precursor is characterized by the norbornane-2-spiro-alpha-cyclopentanone-alpha '-spiro-2''-norbornane-5,5'', 6, 6''-tetracarboxylic dianhydride having a peak area ratio for a specific peak of at least 60%, in a gas chromatograph obtained by gas chromatography analysis.
Owner:UBE IND LTD
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