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Application of supported non-metallocene catalyst in ethene polymerization process by slurry method
The invention discloses an application of load non- metallocene catalyst in the slurry process for vinyl polymerying, the load non- metallocene catalyst and catalyst promoter forming the catalytic system, the alkene polymerization comprising: vinyl homopolymerization, combined polymerization of vinyl with propylene, butylenes, hexane, octane or norbornene; the catalyst carrier being chosen from: inorganic oxide of metallic oxide from IIA, IIIA, IVA, and IVB groups, or oxided mixture and mixing oxide; the catalyst promoter being chosen from: methylaluoxane, ethylaluoxane, isobutylaluoxane, trimethylaluminum,triethylaluminum,triisobutylaluminum,methylaluoxane-trimethylaluminum or methylaluoxane-triethylaluminum; the mole proportion between the catalyst promoter and catalyst being Al / Ti= 1:1-500. The inventioin is characterized by the less methylaluoxane consumption, stable reaction, easy-to-control polymerization temperature and non still-sticking phenomenon. The produced polyolefine possesses perfect granual shape, and the maximum polymer clamp density can reach 0.385 g / ml.
Owner:SINOPEC YANGZI PETROCHEM
Biodegradable linear random copolyester and its preparation method and uses
ActiveCN1807485AGood colorSimple operation processMonocomponent polyesters artificial filamentPolyester coatingsCopolyesterStructural unit
The invention discloses a biodegradable linear random copolyester, its preparation method and uses, wherein the copolyester has a structural unit of (1), wherein m is an integer of 2-10, n is an integer of 0-8, p is an integer of 2-10, m, n, p are identical or different, x is an integer of 1-10, y is an integer of 1-10, the average molecular weight Mw of the copolyester is 100,000-600,000g / mol, its molecular weight distribution is 1.2-3, which is measured through GPC method. The copolyester can be widely applied into section bar, film, fabric and coating.
Owner:CHINA PETROLEUM & CHEM CORP +1
Method for preparing environmentally-friendly adhesive for lignin-based timber
ActiveCN102061141AAdequate responseLow in free phenolsAldehyde/ketone condensation polymer adhesivesAdhesiveTime ratio
The invention discloses a method for preparing an environmentally-friendly adhesive for a lignin-based timber. The method comprises the following steps of: 1) adding phenol, formaldehyde solution, lignin, first alkali liquor and diluting water into a reactor, heating to the temperature of between 75 and 85 DEG C and reacting for 2.5 to 3.5 hours, wherein the molar ratio of formaldehyde to the phenol is 2.20:1-2.40:1; the formaldehyde solution is added for three times in a mass ratio of 1.5 to 1.0 to 1.0; and the reaction time ratio of the added formaldehyde solution is 1.2 to 1.0 to 1.0; 2) cooling to 70 DEG C, adding a formaldehyde collector and second alkali liquor, and reacting at the temperature of between 65 and 70 DEG C for 20 to 50 minutes; and 3) cooling to the temperature of between 30 and 40 DEG C, adding an intensifier, stirring for 10 to 30 minutes, cooling and discharging. In the method, a 50 to 60 percent petroleum-based phenol raw material can be substituted; the methodis stable in reaction, easy to control and easy for industrial production; formaldehyde emission of a plywood reaches E0 level; adhesive strength meets the requirements of national class I plates; and a new approach is provided for the development of an environmentally-friendly biomass-based timber adhesive and recycling of wastes.
Owner:青岛生物能源与过程研究所
Preparation method of epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating and its products
The invention provides a preparation method of an epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating, comprising the following steps: preparing raw materials; synthesizing an organosilicon pre-polymer; synthesizing an epoxy-modified organosilicon resin; and preparing the epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating. The invention also provided the epoxy-modified insulated thermal-conductive high-temperature resistant organosilicon coating prepared by the method. The coating is composed by the epoxy modified organosilicon resin, fillers, a coupling agent and solvents. The coating prepared by the method in the invention takes account of insulation, thermal-conductivity, and high-temperature resistance at the same time, has coating adhesion of first level, hardness of 5H, a breakdown voltage of 1800V / 0.5mA, 2 seconds, a heat transfer coefficient of larger than 100W / (m<2>.K), and no obviously changed coating at a temperature of 250 DEG C for 24 hours, therefore the coating can be widely used in various industrial equipment and household appliances.
Owner:DONGGUAN HONGDA POLYUREFHANE RESIN +2
Production method for manganese sulfate by using biological cellulose and low-grade manganese ores
The invention discloses a production method for manganese sulfate by using low-grade manganese ores. According to the method, manganese sulfate with high purity can be produced by using waste low-grade manganese ores with manganese content of 10% to 20%, manganese tailing or manganese-containing solid waste residue. The method comprises the steps of preparation of raw materials, a slaking reaction, a leaching reaction, neutralization and purification of leachate, etc. According to the invention, production of manganese sulfate is not restricted by the grade of manganese ores, and low-grade manganese oxide ores with a grade greater than 10%, manganese tailing or manganese-containing solid waste residue can be fully utilized; produced manganese sulfate has high yield and high purity and is a very important industrial fundamental product; almost no external heat supply is needed, low energy consumption is achieved, production cost is low, it does not need to turn over and mix materials in the process of the reactions, the reactions are smooth, no toxic gas is generated, and no environmental pollution is produced; discharge of three wastes (waste gas, waste water and industrial residue) reaches national discharge standards for environmental protection, and there is no dust pollution in a workshop.
Owner:陈昆先 +1
Method for preparing chitin and its chitosan and chitosan oligosaccharide
InactiveCN101144097ATake advantage ofImprove production conditionsMicroorganism based processesFermentationSolubilityBioreactor
The present invention relates to a method for preparing chitin and chitosan oligosac charide. The method comprises the steps that usual raw materials such as the crust of shrimp and crab, the insect crust or the fungal mycelia, etc. are micronized through the dry process or wet process; the carapace material of the obtained fine powder raw material is decalcified with the chemical process, and then is defatted and deproteinized with the method of micro-organism compound enzyme coarse enzyme liquid co-enzymolysis, and the insect and fungus fine powder thereof is directly defatted and deproteinized; a whole cell immobilizing bioreactor of a chitin deacetylase high-yield producing strain is prepared, to perform the circulatory deacetylation to the chitin and then obtain chitosan with corresponding degree of deacetylatoion; obligate anaerobic acid-producing bacterium and high-yield producing chitosan bacterium are utilized, the chitosan is submerged and fermented in the liquid, to obtain chitosan oligosaccharide with high water solubility. The present invention has the advantages that the method is helpful to fully utilize the resources, and makes the waste to the worth, at the same time, the default of the manufacturing process of the chemical process can be avoided, the production efficiency is improved, the energy is saved, the consumption is reduced, the byproduct with corresponding high value added can be produced, the comprehensive economic benefits of the relative secondary industry are obviously improved, the industrial development is promoted, and the multi-win effect is attained.
Owner:重庆百奥帝克微生态科技有限公司
Resonant element transducer
InactiveUS7149318B2Optimize allocationSmooth peakElectrets selectrostatic transducerPiezoelectric/electrostrictive transducersTransducerLoudspeaker
A transducer (14) for producing a force which excites an acoustic radiator, e.g. a panel (12) to produce an acoustic output. The transducer (14) has an intended operative frequency range and comprises a resonant element which has a distribution of modes and which is modal in the operative frequency range. Parameters of the transducer (14) may be adjusted to improve the modality of the resonant element. A loudspeaker (10) or a microphone may incorporate the transducer.
Owner:GOOGLE LLC
Method and apparatus for motor control
ActiveUS6936991B2Exceeds capabilityImprove stabilityMotor/generator/converter stoppersAC motor controlMaximum torqueCurrent limiting
A closed-loop permanent magnet motor control method and system optimally partitions torque and flux-weakening currents to produce a desired torque without exceeding the capability of the DC source. A maximum limit for allowable torque current and a minimum threshold for the maximum torque current are determined, and the flux current is varied based at least in part on whether the maximum torque current limit is above or below the minimum threshold while operating in a flux-weakening region to compensate for the variability of the DC source voltage.
Owner:VITESCO TECH USA LLC
Homogenous low-heat-conductivity inorganic heat insulation board and preparation method thereof
The invention discloses a homogenous low-heat-conductivity inorganic heat insulation board and a preparation method thereof. The homogenous low-heat-conductivity inorganic heat insulation board is prepared from the reaction of an inorganic material, filler and polyurethane hard foam and prepared from the following raw materials in parts by weight: 31 to 85 parts of the inorganic material, 0 to 20parts of the filler, and 15 to 49 parts of the polyurethane hard foam. The heat conduction coefficient of the prepared insulation board is less than 40mW / (m.K), the integral density is 35 to 500 kg / m<3>, and the thermal insulation and heat preservation performance is good. The compressive strength is greater than or equal to 0.1MPa, the tensile strength is greater than or equal to 0.1MPa, the mechanical strength is high, and the durability is good. The oxygen index is greater than or equal to 30 percent, the combustion growth rate index is less than or equal to 120W / s, the total heat release amount in 600s is less than or equal to 7.5MJ, and the homogeneous low-heat-conductivity inorganic insulation board is difficult to combust and high in fireproof grade. The preparation process is simple and suitable for the industrialized production.
Owner:南京红宝丽新材料有限公司
Preparation of high molecular weight instant cation polyacrylamide
The invention relates to a preparation method for instant cation polyacrylamide with a high molecular weight. The monomer of acrylamide and a cation type monomer are used as the main materials, firstly, the acrylamide and a comonomer are dissolved into deionized water; then a photoinitiator and / or a photosensitizer additive and a redox initiator are added in the solution to form a compound initiating system; the materials of the components are uniformly mixed in a viscous state, poured on a plane and paved into a sheet shape, introduced with high purity nitrogen, then ultraviolet light illumination is carried out to the materials paved into the sheet shape; after the materials of the viscous state are in a gel block, the materials are dried, broken, granulated and cracked to obtain a product of a dry powder shape. In the invention, the heat release and temperature rising of bulk adiabatic polymerization are avoided, while the polymerization and drying are carried out under a lower temperature; therefore, the reaction process is stable; the product has the advantages of higher molecular weight, better solubility, faster dissolving speed, simple technique and low cost; in addition, the processing after polymerization reduces the working procedure of breaking of bulk gel.
Owner:朱定洋
Method of preparing clubbed nano-cellulose
The invention discloses a method for preparing nano-rod cellulose, which comprises the following steps: dispersing fiber raw material into sulphuric acid water solution of which mass concentration is 50 to 65 percent, hydrolyzing the fiber raw material by single-mode microwave radiation for 5 to 60 minutes at a temperature of between 20 and 50 DEG C and at the microwave radiation power of 10 to 100 watts, then adding distilled water into hydrolysis solution and diluting the hydrolysis solution to have 10 times of volume, and obtaining stable nano-rod cellulose suspension through post treatment processes such as centrifugal separation, dialysis, filter, ultrasonic dispersion and the like of the diluent, so as to obtain the nano-rod cellulose of which width is about 10 nanometers and length is about 200 to 300 nanometers.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Paint for H grade polyurethane enamelled wire with good saline water needle performace capable of directing welding at low temp.
InactiveCN1597815AImprove heat resistanceQuality improvementPlastic/resin/waxes insulatorsPolyurea/polyurethane coatingsLacquerSolvent
The invention relates to an H-grade wire coating enamel that has good salt water pinhole performance and can be directly welded at low temperature, containing hydroxyl component, sealed isocyanate component and solvent, where its hydroxyl component has an acid value less than 2, a hydroxyl value of 150-300, and number-average molecular weight of 1500-5000, and as synthesized, the raw materials has at least m-phthalic acid, p-phthalic acid, adilic acid, glycerin and a kind of dibasic alcohol in the weight ratio of 1 to (0.2-2) to (0.2-0.5) to (0.5-3) to (0.5-1.5); and its sealed isocyanate component is partially added of MDI by mixed polyalcohol that at least has a dibasic alcohol and a tribasic alcohol; in the paint base, the equivalent ratio of isocyanate base to OH is (0.9-1.2) : 1, and it reaches H-grade and has good salt water pinhole property of paint film, tin daubing temperature less than or equal to 375 deg.C.
Owner:CNOOC CHANGZHOU PAINT & COATINGS IND RES INST
Percussion transducer
InactiveUS20050039593A1Dampen high-frequency resonancesProvide protectionElectrophonic musical instrumentsPiezoelectric/electrostriction/magnetostriction machinesElectricityTransducer
A ring-shaped percussion transducer for converting a striking impact into a representative electrical pulse triggering signal is suitable for mounting on the center axis of a percussion instrument. In a preferred embodiment, the transducer is formed of a piezo electric material of ring shape; protected on the top and bottom by thinner ring shaped washers; enclosed in a protective coating and mounted along the center axis of a percussion device which when struck transmits vibrations to the percussion transducer. The percussion transducer is connected to conventional downstream electronics so as to produce a sound responsive to the striking impact.
Owner:WACHTER MARTIN RICHARD
Active shock module prosthesis
InactiveUS20050209707A1Easy to optimizeProvide resistanceBelleville-type springsRotating vibration suppressionProsthesisEngineering
An impact-absorbing shock module comprises two pylons telescopingly engaged to permit axial and rotational motion therebetween. A resilient element, such as a spring-fluid combination, a plurality of interconnected disks, or a Belleville spring, provides axial shock absorption. A tubular torque-resisting cuff provides rotational resistance, or torsion-resistance. A fluid valve is optionally provided so that the fluid pressure may be varied to adjust the torsion resistance.
Owner:PHILLIPS VAN L +1
Glycol catalyst synthesized by hydrogenating oxalic ester and preparation method and application thereof
InactiveCN101524646AImprove hydrogenation activityLow investment costOrganic compound preparationHydroxy compound preparationHigh activityMetal
The invention discloses a glycol catalyst synthesized by hydrogenating oxalic ester and a preparation method and an application thereof. The catalyst has the chemical formula of CuO-AOx / Al2O3, wherein A is one or more than one metallic element of Zn, Mn, Mg and Cr, x is half of the valence number of A, the content of CuO accounts for 40 percent to 80 percent of the catalyst mass, the content of AOx accounts for 5 percent to 40 percent of the catalyst mass and the content of Al2O3 accounts for 5 percent to 30 percent of the catalyst mass. The catalyst has high activity and selectivity at low temperature and under low pressure, the energy and power consumption in production can be reduced greatly and the catalyst has good stability and long service life. The preparation method of the catalyst is simple and raw materials as industrial products are easily obtained and have low price.
Owner:DANYANG DANHUA COAL CHEM
Novel aqua regia system ITO (indium tin oxide) etching solution and its preparation method
InactiveCN102732252AModerate etch rateSmooth responseSurface treatment compositionsNitro compoundActive agent
A novel aqua regia system ITO etching solution is characterized in that the etching solution comprises hydrochloric acid, nitric acid, pure water and additives, wherein the additives comprise a nitrate compound, a chlorine-based compound and a surfactant. A preparation method of the etching solution comprises the following steps: 1, adding a highly-acidic ion exchange resin to hydrochloric acid and nitric acid respectively, stirring to mix, filtering out the highly-acidic ion exchange resin, and controlling or removing impurity ions in the hydrochloric acid and the nitric acid; 2, weighing the hydrochloric acid, the nitric acid, the chlorine-based compound, the nitro-compound, the surfactant and the pure water according to a ratio; 3, dissolving the chlorine-based compound, the nitro-compound and the surfactant in water, and uniformly mixing the resulting solution with the nitric acid and the hydrochloric acid; and 4, letting the mixture obtained in step 3 in a filterer, and filtering to obtain the ITO etching solution. The etching solution has the advantages of stability, moderate etching efficiency, and good etching efficiency.
Owner:JIANGYIN RUNMA ELECTRONICS MATERIAL
Polymer mobility control agent suitable for ultrahigh-salinity oil deposit and preparation method thereof
ActiveCN104448127AGood temperature and salt resistanceGood thermal stabilityDrilling compositionPolymer scienceWater soluble
The invention relates to a polymer mobility control agent suitable for an ultrahigh-salinity oil deposit and a preparation method thereof, and the polymer mobility control agent is mainly used for solving the problem that a polymer can not meet the requirement for tertiary oil recovery due to poor temperature resistant property, salt resistant property and shearing resistant property in the prior art. In order to better solve the problem, the technical scheme adopted by the invention is as follows: the control agent for an amphoteric hydrophobic associated polymer comprises the following components in parts by weight of the amphoteric hydrophobic associated polymer: 5-99.9 parts of nonionic water-soluble monomers, 0-50 parts of anionic monomers or / and cationic monomers, 0.1-10 parts of hydrophobic monomers with surface activity, 0.1-5 parts of inorganic substances and 1-20 parts of surface active agents. The preparation method disclosed by the invention can be used for the industrial production of the polymer mobility control agent suitable for the ultrahigh-salinity oil deposit.
Owner:CHINA PETROLEUM & CHEM CORP +1
Catalyst for synthesizing 5-hydroxymethylfurfural by hexose dehydration and method for synthesizing 5-hydroxymethylfurfural
InactiveCN101811066AEnables a clean synthesis processHigh selectivityOrganic chemistryOrganic-compounds/hydrides/coordination-complexes catalystsSolventHydroxymethylfurfural
The invention discloses a catalyst for synthesizing 5-hydroxymethylfurfural by hexose dehydration and a method for synthesizing the 5-hydroxymethylfurfural by using the catalyst. The catalyst consists of iron halide and ammonium halide, and the molar ratio of the iron halide to the ammonium halide is 0.1 to 10. The synthesizing method comprises the following steps: dissolving a reaction substrate into a solvent, adding the catalyst consisting of the iron halide and the ammonium halide into the solution, reacting the solution for 0.5 hour at the temperature of between 0 and 200 DEG C, distilling and condensing the solution, performing extraction, distilling the concentrate under reduced pressure, drying the distillate and collecting a product. The catalyst of the invention overcomes the defects that the catalyst in the prior art has large toxicity and the catalytic reaction needs a large amount of organic solvent and additive. The catalyst totally shows the characteristic of a homogeneous catalyst in the reaction process, and has high catalytic activity and high selectivity; and the using amount of the catalyst can be optimized to trace so as to facilitate the separation and purification of the reaction product. The catalyst has the advantages of simple reaction system, environment friendliness, low toxicity, low production cost and easy post treatment.
Owner:TIANJIN UNIV
Preparation technique of alogliptin benzoate
The invention relates to a preparation technique of a medicine alogliptin benzoate for treating Type 2 diabetes. The technique comprises the following steps: reacting the raw material 6-chloro-3-methyluracil with 2-cyanobenzyl bromide to prepare 2-(6-chloro-3-methyl-2,4-dioxo-3,4-dihydro-2H-pyrimidyl-ylmethyl)-benzonitrile, and carrying out substitution reaction with (R)-3-Boc-aminopiperidine; after the reaction finishes, removing Boc to obtain alogliptin; and finally, salifying with benzoic acid to obtain the alogliptin benzoate. The invention is characterized in that in the substitution reaction, the acid binding agent potassium carbonate is added; and after the reaction finishes, filtration is carried out, and p-toluenesulfonic acid is added into the filtrate to remove the Boc. The preparation technique provided by the invention has the advantages of simple procedure, higher product yield and higher product purity.
Owner:成都天翼医药科技有限公司
Chlopyrifos pesticides waste water treatment process
InactiveCN101172728APromote degradationImprove biodegradabilityMultistage water/sewage treatmentWater/sewage treatment by neutralisationCatalytic oxidationPendimethalin
The invention discloses a treatment process of waste water polluted by the pesticide of Dursban, and the process includes the procedures of acid eduction, complexation and extraction, Fenton oxidation and catalytic oxidation. The invention is characterized in that Dursban waste water and herbicide Pendimethalin waste water are comprehensively treated, thereby achieving the proposal of waste controlled by the waste, decreasing the load of organic pollutant being hard to be graded in the waste water, improving the biological degradability of the waste water, removing the pollutant from the waste water, and increasing the biochemical performance of the waste water. Besides, the invention has the advantages of safe and advanced technique, clean operation and low waste water treatment cost.
Owner:山东华阳农药化工集团有限公司
Lissapol N(methyl) propenoic acid ester and its preparation and use
InactiveCN1511859AMild reaction conditionsEasy to industrializeOther chemical processesTransportation and packagingMethacrylateAlkylphenol
The present invention relates to the preparation and use of alkylphenol ethoxylate (methyl) acrylic ester. The preparation is preferably a ester exchange reaction process including azeotropic dewatering of the mixture of alkylphenol ethoxylate and acrylic ester or methyl acrylic ester in the presence of azeotropic solvent and polymerization inhibitor, ester exchange reaction in the presence of catalyst, separating and recovering azeotropic solvent and acrylic ester or methyl acrylic ester to obtain alkylphenol ethoxylate (methyl) acrylic ester. The technological process is simple and has no polymerization of the material in the reactor and separating tower, good product appearance and alkylphenol ethoxylate converting rate up to 80-95 %.
Owner:SINOPEC QILU CO
Method for preparing aldehydes and ketones by using oxygen gas to oxidize alcohols
InactiveCN101148400ALow raw material costMild reaction conditionsOrganic compound preparationCarbonyl compound preparationKetoneOxidizing agent
The present invention relates to chemical reaction process of oxidizing alcohol with oxygen to prepare aldehyde or ketone, and is especially an alcohol oxidizing process with 2, 2, 6, 6-tetramethyl piperidine nitroxide free radical as catalyst. In organic solvent, and in the presence of catalyst comprising TEMPO, sodium nitrite and transition metal salt, alcohol is oxidized to produce aldehyde or ketone. The process has the alcohol, TEMPO, sodium nitrite and transition metal salt in the weight ratio of 100 to 1-5 to 1-10 to 1-10, oxygen pressure of 0.1-0.8 MPa, reaction temperature of 0-80 deg.c and reaction time of 1-24 hr. The present invention has the advantages of mild reaction condition, easy control, low cost, high safety and environment friendship.
Owner:DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
Device for preparing chlorinated polyvinyl chloride by gas-solid phase method and method thereof
InactiveCN101831021APrevents sticking and discolorationReduce energy consumptionChemistryUltraviolet lights
The invention belongs to the technical field of chemical processes and equipment, and relates to a device for preparing chlorinated polyvinyl chloride by a gas-solid phase method and a method thereof. The chlorinated polyvinyl chloride is prepared from polyvinyl chloride (PVC) and chlorine gas serving as raw materials in a dry state. The device comprises a riser reactor, a turbulent fluidized bed reactor, an upper connecting pipe and a lower connecting pipe, wherein the synthesis of the chlorinated polyvinyl chloride is performed in the riser reactor and the turbulent fluidized bed reactor; a chain initiation process is realized and chain transfer is finished by activating the chlorine gas with ultraviolet light, so that the whole process is decoupled into a quick process and a slow process, the chlorination of the materials is uniform, bonding and discoloration can be effectively prevented, the energy consumption is reduced and the operation is simplified; the device has the advantages of compact structure, high practicability and obvious improvement on the efficiency; hydrogen chloride separated from reaction tail gas can be recycled; and the whole process has no waste discharge.
Owner:HEBEI UNIVERSITY OF SCIENCE AND TECHNOLOGY
Circuit for minimizing or eliminating pulse anomalies in human body model electrostatic discharge tests
InactiveUS20070159205A1Without unwanted pulse distortionEliminates creationMaterial analysis by electric/magnetic meansMeasuring interference from external sourcesEngineeringElectrostatic discharge
A new circuit for producing simulated electrostatic discharges (ESD) based on the Human Body Model (HBM) is disclosed for testing integrated circuits. HBM ESD test systems provide stress pulses defined by industry standards. The pulses produced by prior art have small imperfections or anomalies. These anomalies can cause incorrect testing to certain devices. The improved ESD HBM test system herein disclosed provides pulses meeting the requirements of industry standards while reducing several anomalies to negligible levels.
Owner:THERMO KEYTEK LLC
Method for synthesizing cosmetic-grade 1,3-butanediol
ActiveCN105585448ACondensation reaction is mildReduced risk of deep condensationOrganic compound preparationHydroxy compound preparationCrotonaldehydeDistillation
The invention relates to a method for synthesizing cosmetic-grade 1,3-butanediol. The method includes the steps that acetaldehyde and water are mixed evenly and then injected into a reaction kettle, and dilute acetic acid is dripped under the alkaline condition so that the reaction system can be neutralized to be neutral; flashing is carried out, acetaldehyde obtained in distillation is recycled, and distillation residual liquid is 3-hydroxybutanal; obtained 3-hydroxybutanal and a catalyst are mixed evenly, hydrogen pressure is kept, centrifugal separation is carried out on the obtained product to obtain the catalyst for recycling, flashing is carried out on the liquor at 120 DEG C to obtain water and the byproducts ethyl alcohol and crotonaldehyde, and reduced pressure distillation is carried out to obtain coarse 1,3-butanediol; purification is carried out. The process of synthesizing 1,3-butanediol through condensation and hydrogenation reduction of an acetaldehyde liquid phase is improved through the steps, and thus the product 1,3-butanediol meets the quality requirement of the cosmetic industry.
Owner:LIAONING KELONG FINE CHEM
Profile controlling and flooding composition for high-temperature oil reservoirs with high salinity
ActiveCN104559992AGood temperature and salt resistanceNarrow particle size distributionDrilling compositionThermodynamicsMicrosphere
The invention relates to a profile controlling and flooding composition for high-temperature oil reservoirs with high salinity and an application of the composition in tertiary oil recovery of the high-temperature oil reservoirs with high salinity, and mainly aims at solving the problems of poor heat resistance and salt tolerance and low oil displacement efficiency of an oil displacement agent under the conditions of high temperature and high salinity in the prior art. The problems are well solved by virtue of the following technical scheme: the profile controlling and flooding composition for high-temperature oil reservoirs with high salinity is prepared from the following components in percentage by weight: (1) 0.01-3.0% of heat-resistant and salt-tolerant polyacrylamide microspheres, (2) 0.01-5.0% of anionic-nonionic surfactant and (3) 92.0-99.98% of injected water; and the profile controlling and flooding composition can be applied to field applications for increasing the recovery rate such as depth profile controlling, water plugging and oil displacement for tertiary oil recovery of the high-temperature oil reservoirs with high salinity.
Owner:CHINA PETROLEUM & CHEM CORP +1
Biodegradable linear random copolyester and its preparation method and uses
ActiveCN100429256CGood colorSimple operation processMonocomponent polyesters artificial filamentPolyester coatingsFiberPolymer science
The invention discloses a biodegradable linear random copolyester, its preparation method and uses, wherein the copolyester has a structural unit of (1), wherein m is an integer of 2-10, n is an integer of 0-8, p is an integer of 2-10, m, n, p are identical or different, x is an integer of 1-10, y is an integer of 1-10, the average molecular weight Mw of the copolyester is 100,000-600,000g / mol, its molecular weight distribution is 1.2-3, which is measured through GPC method. The copolyester can be widely applied into section bar, film, fabric and coating.
Owner:CHINA PETROLEUM & CHEM CORP +1
Glycolide preparation method
InactiveCN105272958ALow impurity contentImprove conversion rateOrganic chemistryDepolymerizationReaction temperature
The present invention relates to a glycolide preparation method. A purpose of the present invention is mainly to solve the problems of low purity and low yield of the prepared glycolide in the prior art. The technical scheme comprises: (1) melt condensation polymerization: a) normal pressure condensation polymerization, wherein a glycolic acid crystal is subjected to sectional reaction under a normal pressure in the presence of a condensation catalyst or a transesterification catalyst, the reaction is performed for 0.5-10 h by maintaining the reaction temperature between the glycolic acid melting point and the glycolic acid boiling point at the first stage normal pressure prepolymerization, and at the second stage normal pressure condensation polymerization, the condensation reaction or the transesterification reaction is performed at a reaction temperature of 112-220 DEG C until no water is distilled to obtain the molten glycolic acid oligomer, b) pressure reducing condensation polymerization, and c) strengthened condensation polymerization; and (2) high temperature depolymerization, wherein a depolymerization reaction is performed at a reaction temperature of 230-290 DEG C under a reaction pressure of 0.1-1 KPa so as to obtain the glycolide crude product. With the technical scheme of the present invention, the problems in the prior art are well solved, and the method can be used in the industrial glycolide production.
Owner:CHINA PETROLEUM & CHEM CORP +1
Pyridone derivatives and process for preparing the same
A process for preparing a pyridone derivative (4), which comprises reacting the compound (1) with a hypochlorite or a hypobromite or with lead tetraacetate to give the compound (2), and reacting the compound (2) with the compound (3). Said process is preferably especially from the standpoint of safety. wherein R1 is hydrogen, alkyl, substituted alkyl, etc.; Y1 is hydrogen, alky, substituted alky, etc.; Y2 and Y3 are indenpently hydrogen, halogen, etc.; and L is alkyl, substituted alkyl, etc.
Owner:SUMITOMO DAINIPPON PHARMA CO LTD
Low-moisture low-variable serial saturation tower thermal CO transformation technology
ActiveCN102888253AShort transformation processReduce resistanceHydrogenCombustible gas catalytic treatmentDry gasMoisture
Owner:CHINA PETROCHEMICAL CORP +2
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