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101results about How to "The reaction system is stable" patented technology
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Core-shell type cationic/anionic polyacrylamide profile control oil displacing microsphere and preparation method thereof
The invention discloses a core-shell type cationic / anionic polyacrylamide profile control oil displacing microsphere and a preparation method thereof. The core-shell type cationic / anionic polyacrylamide profile control oil displacing microsphere with a micrometer particle size range is prepared in one pot by adopting a dispersion polymerization method, and the whole preparation process is continuously completed by two steps: firstly synthesizing a core part of a microsphere, and then synthesizing a shell part of the microsphere. The core part of the microsphere consists of water-soluble monomer acrylamide, an ionic monomer I and a crosslinking agent; the shell part of the microsphere consists of water-soluble monomer acrylamide, an ionic monomer II and a crosslinking agent; and the ionic monomer I and the ionic monomer II have opposite charges. The particle size of the core-shell type cationic / anionic polyacrylamide profile control oil displacing microsphere is 1-200mu m. The preparation method is simple in preparation process, the whole preparation process is environmentally friendly and low in cost; and a solvent can be recycled, and the recycling rate is above 80 percent. The core-shell type cationic / anionic polyacrylamide profile control oil displacing microsphere is used as a profile control oil displacing material, and has excellent injectivity and mobility.
Owner:TIANJIN UNIV
Method for decomposing vanadium slag under normal pressure by adding carbon-containing substance into sodium hydroxide solution
The invention relates to a method for decomposing vanadium slag under normal pressure and extracting vanadium and chromium by adding a carbon-containing substance into a sodium hydroxide solution. The method comprises the following steps of: uniformly mixing the vanadium slag and the carbon-containing substance, and adding the mixture, water and NaOH into a normal pressure reactor; introducing oxidizing gas for oxidization reaction, and diluting reaction slurry obtained by the reaction by using a diluent to obtain mixed slurry containing NaOH, sodium vanadate, sodium chromate, sodium silicate and tailings; and filtering and separating the mixed slurry to obtain the tailings, and an alkaline solution containing the vanadium and the chromium. The operating temperature of the method is below the boiling point of the solution, and the method can be implemented under normal pressure, and is easy to implement and high in safety; and the operating temperature is far lower than the temperature of the traditional vanadium extracting process, the extraction ratio of the vanadium is high, the chromium can be partially extracted synchronously, the total vanadium contained in the tailings is 0.2 to 0.6 weight percent (based on V2O5), and the leaching rate of the chromium is 8-20 percent.
Owner:INST OF PROCESS ENG CHINESE ACAD OF SCI
Method for preparing acrylic ester functionalized copolymer for plasticizing nylon 6
The invention discloses a method for preparing an acrylic ester functionalized copolymer for plasticizing nylon 6. The method comprises the following steps of: a, pre-emulsifying a nuclear layer monomer; b, pre-emulsifying a shell layer monomer; and c, preparing acrylic ester emulsion, namely, adding three layers of monomer pre-emulsion into a reactor filled with nuclear layer monomer pre-emulsion of the step a respectively, adding initiator solution of which the concentrations are different into the reactor to obtain acrylic ester functionalized copolymer emulsion and refrigerating, washing, filtering and drying the copolymer emulsion to obtain acrylic ester functionalized copolymer powder. When the method is used for preparing the acrylic ester functionalized copolymer for plasticizing the nylon 6, the conversion rates of the monomers reach over 93 percent, aggregate content is less than 1.5 percent and final latex particle size is less than 0.7. Therefore, the method has the advantages of high monomer utilization ratio, stable reaction system and mono-dispersed distribution of the latex particle size.
Owner:HEBEI UNIV OF TECH
Slow-release type polycarboxylic water reducing agent, preparation method thereof and application
ActiveCN105174783AObvious beneficial effectHas an initial water-reducing effectAqueous solutionMechanical property
The invention belongs to the technical field of a concrete admixture in building materials and provides a slow-release type polycarboxylic water reducing agent, a preparation method thereof and application. The slow-release type polycarboxylic water reducing agent is synthesized by adopting a free-radical polymerization method in an aqueous solution. The slow-release type polycarboxylic water reducing agent is prepared by unsaturated polyoxyethylene ether, unsaturated acid or a mixture of unsaturated acid ester and the unsaturated acid, a chain transferring agent, an oxidizing agent, a reducing agent and water. The slow-release type polycarboxylic water reducing agent has the advantages of low doping amount, good plasticity-maintaining effect, good cement adaptability and good energy-saving and environmental-friendly effects and the like; the production process is simple; the equipment investment is less and the cost is low; by the adoption of the water reducing agent, water reducing components can be gradually released, and the content of the effective water reducing components in the concrete is guaranteed, and the plasticity of the concrete is maintained, and the cement hydration can be delayed, further the maintaining capability for the slump and the fluidity is excellent for concrete with large slump and concrete with medium and small slump respectively, and the large-volume concrete cracks generated by over-high hydration temperature can be reduced, and the mixability and the mechanical property of the concrete can be improved.
Owner:大连市建筑科学研究设计院股份有限公司
Method for preparing functional acrylate copolymer emulsion for toughening nylon 6
The invention discloses a method for preparing functional acrylate copolymer emulsion for toughening nylon 6, which comprises the following steps: a. preemulsifying a nuclear layer monomer; b. preemulsifying a shell monomer; c. preparing acrylate emulsion: respectively adding three layers of monomer preemulsion in a reactor containing nuclear layer monomer preemulsion in step a, adding three initiator solutions with different concentrations to obtain multi-layer nuclear shell structural functional acrylate copolymer emulsion, and finally freezing, washing, filtering, drying and the like to obtain functional acrylate copolymer powder with a multi-layer nuclear shell structure. The conversion rate of the functional acrylate copolymer emulsion monomer prepared by the invention can reach over 95%, the content of the aggregate is below 1.8%, and final latex particle size distribution is less than 0.5, thus the visible monomer use rate is high, the reaction system is stable, and the latex is distributed in monodispersion.
Owner:HEBEI UNIV OF TECH
High-thermal conductivity high-molecular composite material
InactiveCN105061999AImprove thermal conductivityRealize collaborative compoundingAviationResin matrix
The invention relates to a high-thermal conductivity high-molecular composite material, which comprises the following raw materials by weight fraction: 35-45 parts of resin matrix, 60-75 parts of heat conduction filling material, 1-10 parts of toughening filling material, 0.3-1.3 parts of anti-oxidant and 0.5-4 parts of dispersant. The pretreated raw materials are performed with melting mixing through high-molecular material processing equipment to finish the granulation. The highest heat conduction coefficient of a final product is greater than 5.2W / m.K, and flame retardation performance and insulating property are excellent, and mechanical property is good. The raw material source is wide, cost is low, and the preparation steps are simple. The prepared preparation composite material has excellent heat conduction performance, insulating property, flame resistance and mechanical property, and can be widely used in the fields of a heat exchanger, an instrument case, an automobile, a chemical energy and an aviation spaceflight.
Owner:殷姝媛
Preparation method for polymer composite material with high thermal conductivity
InactiveCN105111670AImprove thermal conductivityRealize collaborative compoundingHeat-exchange elementsResin matrixMaterials processing
The invention relates to a preparation method for a polymer composite material with high thermal conductivity. The polymer composite material comprises the following raw materials in parts by weight: 30-40 parts of resin matrix, 65-80 parts of a thermally conductive filler, 4-14 parts of a toughening filler, 0.8-1.8 parts of an antioxidant and 1-4 parts of a dispersant. The pretreated raw materials are subjected to melting and mixing through polymer material processing equipment to realize pelletization. The highest thermal conductivity of each final product is greater than 5.2 W / m.K, and the flame retardant property, the insulating property and the mechanical property are excellent. The raw materials are wide in source, the cost is low, and the preparation process is simple and feasible; the prepared composite material has excellent flame retardant, insulating and mechanical properties, and can be widely applied to fields such as a heat exchanger, an instrument case, an automobile, chemical energy and aerospace.
Owner:陈民
Polymer composite high in heat-conducting property
InactiveCN105199304AImprove thermal conductivityRealize collaborative compoundingPolymer scienceResin matrix
The invention relates to a polymer composite high in heat-conducting property. The polymer composite is characterized by being prepared from, by weight, 30-40 parts of resin matrix, 65-80 parts of heat conduction filling materials, 4-14 parts of toughening filling materials, 0.8-1.8 parts of antioxidants and 1-4 parts of dispersing agents. Raw materials obtained after pretreatment are subjected to fusion and mixing through high polymer material processing equipment, and prilling is completed. The maximum heat conductivity coefficients of final products are all larger than 5.2 W / m.K, the flame retardant property and insulating property are excellent, and the mechanical property is good. The obtained polymer composite is wide in raw material source, low in cost and simple and practicable in preparation approach, excellent in heat-conducting property, insulating property, flame retardant property and mechanical property and is capable of being widely applied to the fields such as meter cases, automobiles, chemical engineering energy, aviation and aerospace.
Owner:陈民
Regulating nucleation method during crystallization of nickel-cobalt-manganese precursor
ActiveCN109422297AParticle size distribution controlControlled nucleation method is simple and efficientCell electrodesSecondary cellsManganesePhysical chemistry
The invention discloses a regulating nucleation method during crystallization of a nickel-cobalt-manganese precursor. The method comprises the following steps: (1) adding a nickel-cobalt-manganese salt solution, an ammonia solution and an alkali solution into a closed reaction kettle containing a base liquid for a reaction; and (2) monitoring D50 and span values of particles generated in the reaction kettle; when the span value is smaller than 1, adding a nucleation feeding liquid to the reaction kettle, performing continuous stirring for the reaction, and monitoring the span value of the particles generated in the reaction kettle continuously; when the span value reaches a preset value, stopping adding the nucleation feeding liquid; and after the span value is lower than the preset value,adding the nucleation feeding liquid to the reaction kettle again, terminating the reaction until the D50 and span values of the particles generated in the reaction kettle reach a target particle size and the preset value separately, collecting materials, and then performing subsequent treatment so as to obtain the nickel-cobalt-manganese precursor, wherein the nucleation feeding liquid is a mixed solution of the nickel-cobalt-manganese salt solution and the ammonia solution, and span = (D90-D10) / D50.
Owner:HUNAN SHANSHAN ENERGY TECH CO LTD
Fluorinated isocyanate and method for preparing fluorinated isocyanate-acrylate copolymer emulsion
ActiveCN103992242AGood compatibilityThe reaction system is stableCarbamic acid derivatives preparationOrganic compound preparationIsocyanateEmulsion
The invention discloses a vinyl-containing fluorinated isocyanate monomer. The preparation method of the fluorinated isocyanate monomer comprises the following steps: reacting diisocyanate with fluorinated alcohol to prepare a fluorinated isocyanate intermediate and then reacting the fluorinated isocyanate intermediate with (meth) hydroxyalkyl acrylate to obtain the fluorinated isocyanate monomer. The organic fluorine-modified polyurethane-acrylate copolymer emulsion with the characteristics of organic fluorine, polyurethane and acrylate resin is synthesized by carrying out emulsion polymerization on the fluorinated isocyanate monomer and the conventional (meth) acrylate. Compared with the prior art, the method for preparing fluorinated isocyanate-acrylate copolymer emulsion has the advantages that since the fluorinated isocyanate monomer is prepared in advance, when an emulsion copolymerization reaction is carried out on the fluorinated isocyanate monomer and acrylates monomer in an aqueous system, the compatibility between the monomers is better, the reaction system is more stable, the reaction is controlled easier and the synthesized copolymer emulsion has better stability.
Owner:BEIHANG UNIV
Detection method of folate metabolism related gene
InactiveCN107254520AReduced activityLow costMicrobiological testing/measurementGel electrophoresisRelated gene
The invention discloses a detection method of a folate metabolism related gene, which includes steps of extracting DNA from oral mucosa cell of a detector; amplifying MTHFR gene C677T by SEQ NO 1 and SEQ NO 2; amplifying MTHFR gene A1298C by SEQ NO 3 and SEQ NO 4; amplifying MTHFR gene A66G by SEQ NO 5 and SEQ NO 6; extracting DNA from oral mucosa cell as a template to perform PCR reaction; performing sepharose gel electrophoresis of 1% of ordinary PCR amplified product on three pairs of primers; recycling a strip of a kit recycling item from the 1% of agarose gel electrophoretic band by sepharose gel; performing sequence testing reaction; purifying the sequence testing reaction product and denaturing; testing sequence by an upper 3730 sequence tester; analyzing three SNP gene models of the sequence testing result by Chromas software. The method has the advantages of high detection accuracy, and convenience of use.
Owner:安徽安龙基因科技有限公司
Method for directly synthesizing sucrose fatty acid ester by biodiesel and sucrose
InactiveCN101805381ALow costHigh industrial feasibilityEsterified saccharide compoundsSugar derivativesSucroseBiodiesel
The invention provides a method for directly synthesizing sucrose fatty acid ester by biodiesel and sucrose, in which a solvent-free method is adopted to synthesize the sucrose fatty acid ester under the protection of N2 and the barometric pressure of 1, and an isovolumetric immersion method is adopted to prepare a load-type solid base catalyst by immersion; then potassium stearate is added after the biodiesel is mixed with the sucrose, the mixture is reacted until the reaction system presents in a faint yellow emulsion, then the load-type solid base catalyst is added to continue to react, temperature is raised during stirring, N2 is introduced, methanol generated in the reaction process is removed when air in the reaction system is driven away, warming reaction is carried out under the protection of the N2, then the reaction system is cooled, the introduction of N2 is stopped, water is added to stop reaction, and the product is stirred for 10min at the temperature of 80 DEG C; and the crude product is processed to obtain the refined product of the sucrose fatty acid ester. After the crude product is purified by a solvent extraction method, the product purity is above 98%, the N2 can be reused, and the catalyst can be recycled.
Owner:INST OF CHEM IND OF FOREST PROD CHINESE ACAD OF FORESTRY
Method for preparing ethanol by raw materials containing cellulose
ActiveCN101509018AUniform responseHigh yieldBiofuelsMicroorganism based processesCelluloseLiquid water content
The invention relates to a method for preparing ethanol by adopting materials containing cellulose, which comprises the following steps: the materials containing cellulose is exploded by steam; the obtained steam explosion products are mixed with enzyme for enzymolysis; the enzymolysis products are obtained by fermentation; wherein, the method for mixing the steam explosion products and the enzyme comprises the following steps: a first batch of steam explosion products is firstly mixed with the enzyme to obtain mixture, and then the rest steam explosion products are continuously added into the mixture to be mixed with the obtained mixture; wherein, the adding speed of the rest steam explosion products ensures the concentration of the steam explosion products in the reaction system not to be higher than 150g / L; the weight of the first batch of steam explosion products mixed with the enzyme is 10-30wt% of the whole steam explosion products; and the liquid water content of the materials containing cellulose is 30-60 wt%. The method can effectively improve the saccharous conversion rate of the materials and the productivity of the ethanol, can greatly shorten the enzymolysis time and improve the enzymolysis efficiency as well.
Owner:COFCO GROUP
Method for detecting methylation of brain glioma MGMT promoter gene
InactiveCN107190068AImprove detection accuracyHigh sensitivityMicrobiological testing/measurementDNA extractionBacterial colony
The invention discloses a method for detecting the methylation of a brain glioma MGMT promoter gene. The specific steps comprise: extracting the DNA from the brain glioma tissue of a patient by using a tissue DNA extraction kit; carrying out sulfurization treatment on the extracted DNA by using a methylation modification kit; carrying out touchdown PCR on the DNA site template being subjected to the sulfurization modification by using methylation primers represented by SEQ ID NO 1 and SEQ ID 2; diluting the site template 1000 times by using the product obtained through PCR amplification with the methylation primers represented by SEQ ID NO 1 and SEQ ID 2, and carrying out common PCR amplification with primers represented by SEQ ID NO 3 and SEQ ID 4; carrying out 1% agarose gel electrophoresis on the product obtained through the common PCR amplification with the primers represented by SEQ ID NO 3 and SEQ ID 4; recovering the target strip from the 1% agarose gel electrophoresis strips by using an agarose gel recovery kit; carrying out linking transformation on the PCR product and a T carrier, and carrying out blue-white screening; screening recon through bacterial colony PCR; sequencing the positive clones; and analyzing the sequencing results by using biq-analyzer software. The method of the present invention has advantages of high detection accuracy, convenient use, and the like.
Owner:安徽安龙基因科技有限公司
Catalyst system for synthesizing acetic acid through methanol carbonylation and application of catalyst system
ActiveCN104689854ARaw materials are easy to getSimple processOrganic-compounds/hydrides/coordination-complexes catalystsCarboxylic preparation from carbon monoxide reactionAcetic acidPropanoic acid
The invention belongs to the field of acetic acid preparation realized through methanol carbonylation reaction and particularly relates to a catalyst system for synthesizing acetic acid through methanol carbonylation and application of the catalyst system. The catalyst system for synthesizing acetic acid through methanol carbonylation comprises active rhodium, hydroiodic acid or iodine, methyl iodide, water, a lithium acetate aqueous solution and acetic acid, wherein the mass percentage of active rhodium in the whole reaction system is 800-1000ppm, the content of total iodine in the whole reaction system is 2.8-3.5mol / L, the mass percentage of the lithium acetate aqueous solution in the whole reaction system is 8000-12000ppm, the mass percentage of methyl iodide in the whole reaction system is 8-13%, the mass percentage of the water in the whole reaction system is 2%, and the mass percentage of acetic acid in the whole reaction system is 57-62%. By using the catalyst system, methanol can be converted into acetic acid at high speed and relatively-low pressure, so that the production cost of acetic acid is low, the formula is simple, the production process is easy, and byproducts including CO2, H2 and propionic acid are greatly reduced.
Owner:JIANGSU SOPO CHEM +1
Modified nano iron oxide particles and application thereof in anaerobic fermentation
InactiveCN110577243APromote generationEnhanced interactionWaste based fuelInorganic material magnetismOrganic acidNanoparticle
The invention discloses modified nano iron oxide particles and application thereof in anaerobic fermentation. The modified nano iron oxide particles are obtained by surface modification of bare core magnetic nano iron oxide particles, and the modified iron oxide particles have different types of charges. A small amount of the modified iron oxide particles are added to an anaerobic system, and thenanoparticles can promote syntrophism of acidogenic bacteria and methanogenic bacteria to further increase electron transfer, promote the conversion of organic acids to methane generation paths, improve the buffering capacity of the system, increase the stability of the system, and further greatly improve the methane yield.
Owner:JIANGSU ACADEMY OF AGRICULTURAL SCIENCES
Advanced oxidation system for treating organic waste gas and malodorous gas
InactiveCN109603484AThe reaction system is stableImprove oxidation efficiencyGas treatmentDispersed particle separationPersulfateSulfate
The invention discloses an advanced oxidation system for treating organic waste gas and malodorous gas. The system comprises a reactor body, a persulfate solution tank, 254nm ultraviolet lamps and vacuum ultraviolet low-pressure mercury lamps; the persulfate solution tank is arranged at the bottom of the reactor body, an air supply pipeline extends into the bottom of the persulfate tank from outside of the reactor body, a plurality of 254nm ultraviolet lamps are vertically arranged in the persulfate solution tank, the 254nm ultraviolet lamps are arranged on a 254nm ultraviolet lamp fixing plate with a plurality of vent holes, two vacuum ultraviolet low-pressure mercury lamp fixing plates with a plurality of vent holes are arranged above the 254nm ultraviolet lamp fixing plate at intervals,a plurality of vacuum ultraviolet low-pressure mercury lamps are vertically arranged between the two vacuum ultraviolet low-pressure mercury lamp fixing plates, and the top of the reactor body is provided with an air outlet. The oxidation system can produce OH, SO4, and O free radicals, thereby shortening the time for degrading organic pollutants and increasing the types of waste gas treated by the oxidation system.
Owner:SHANGHAI SECOND POLYTECHNIC UNIVERSITY
Preparation method for trimethylamine oxide
The invention discloses a preparation method for trimethylamine oxide. The technical scheme that hydrogen peroxide which is more than trimethylamine or stabilizing agent and / or initiating agent is added is adopted to enable the trimethylamine and the hydrogen peroxide to be reacted totally so as to avoid the raw material loss and to reduce the cost; the stabilizing agent is adopted in the reaction, so that the reaction system can be effectively stabilized, the excessive loss of reaction raw materials is controlled, and the yield is improved; the initiating agent is adopted in the reaction, so that the reaction activation energy can be reduced, and the reaction can be initiated at a lower temperature and can be implemented smoothly. The method reduces the raw material cost, reduces the equipment investment, largely decreases the acute reaction degree, stabilizes the reaction progress, and enables the reaction process to be easily controlled; and mother liquor can be recycled, so that the product yield and quality can be improved.
Owner:HONGFENG CHEM GUAN COUNTY HEBEI PROV
Antimony sulantimonate and production method thereof
The invention discloses antimony thioantimonate and a method for preparing the same, which are characterized by using sodium pyroantimonate and antimony trioxide powder as raw materials, producing a solution of quinquevalent antimony (Sb) by impregnating the sodium pyroantimonate with a sodium sulphide solution, producing a solution of trivalent antimony by impregnating the antimony trioxide powder with hydrochloric acid, pouring the two solutions into a buffer system for synthesis, adjusting the pH value of the mixed solution with hydrochloric acid and sodium hydroxide respectively to keep the pH value between 2.0 and 2.5, and settling, bleaching, drying, crushing and screening precipitations to obtain the antimony thioantimonate product. The method has the advantages of simple process, stable reaction system, good comprehensive recycling, high-quality products, no 'three wastes' pollution and so on. The product of the method is mainly used as an extreme-pressure wear-resistant additive for lubricant grease and a solid lubricating agent.
Owner:YIYANG SHENGLI CHEM IND
Preparation method of buffalo milk fat natural flavoring base material
InactiveCN107028148AUniform reaction systemEasy to operateFood scienceReaction systemFood processing
The invention provides a preparation method of a buffalo milk fat natural flavoring base material, and belongs to the technical field of food processing. The preparation method comprises the following steps of using raw buffalo milk or buffalo milk fat obtained through degreasing the raw buffalo milk as an enzymolysis substrate, performing pasteurization, and performing enzymolysis sequentially through flavored protease and lipase so as to obtain uniform semi-solid buffalo milk fat natural flavoring base material. The preparation method is simple in operating sequences and uniform in reaction systems; the product namely the flavoring base material is rich and full in flavor, rich in micromolecular peptide, amino acids and fatty acid, free from bad flavor of bitter taste and the like, and stable in quality; and the flavoring base material can be wholly applied, can also be used in a manner that after the flavoring base material is centrifuged, milk fat phases are taken to be independently used, and the flavoring base material is widely applied, and is suitable for dairy products and other various healthy foods of which the milk fragrance flavor needs to be improved.
Owner:GUANGXI ZHUANG AUTONOMOUS REGION BUFFALO INST
Alkaline earth metal tungstate/ molybdate red fluorescent powder and preparation method thereof
ActiveCN107163941AImprove luminous performanceUniform particlesLuminescent compositionsRare-earth elementAlkaline earth metal
The invention relates to alkaline earth metal tungstate / molybdate red fluorescent powder and a preparation method thereof, and belongs to the technical field of luminescent materials. The fluorescent powder formula is MeLn2-a-b (WO4) 4-x (MoO4)x:aEu<3+>, bRE<3+>, wherein Me is at least one of alkaline earth metal Ca, Sr and Ba; Ln is at least one of rare earth elements Y, Gd, La and Lu; RE is at least one of doped elements Bi, Sm and Tb, 0<x<4, 0<a<0.5 and 0<b<0.1. The design idea is as follows: a solvothermal soft chemical method is used for synthesis of a sample, Eu<3+> is used as a luminescence center, alkaline earth metal rare earth tungstate / molybdate is used as a matrix, Bi<3+> is added as a sensitizer, and by interactions between ions and introduction of defects in the matrix structure, efficient red light emission can be achieved. The alkaline earth metal tungstate / molybdate red fluorescent powder can effectively absorb near ultraviolet light and emit red fluorescence.
Owner:CHONGQING UNIV OF ARTS & SCI
Method for preparing propylene by cracking C4 olefin added with methanol and/or dimethyl ether
InactiveCN102372574AHigh yieldThe reaction system is stableHydrocarbon from oxygen organic compoundsEthylene productionDimethyl etherHeat supply
The invention relates to a method for preparing propylene by cracking C4 olefin added with methanol and / or dimethyl ether. In a process of preparing the propylene by cracking the C4 olefin, methanol and / or dimethyl ether is added to be common feeding material, reaction thermal released by a methanol and / or dimethyl ether cracking process can be supplied to a C4 olefin cracking process absorbing heat, and the problem that heat supply of a system is insufficient as heat is absorbed in the C4 cracking process can be effectively solved. The method for preparing the propylene by cracking the C4 olefin added with methanol and / or dimethyl ether is beneficial to improving stability of a reaction system and can ensure a reaction to be easier to operate in a project.
Owner:CHINA PETROLEUM & CHEM CORP +1
Bio-based nanometer material and preparation method thereof
The invention relates to a bio-based nanometer material and a preparation method thereof. The preparation method of the bio-based nanometer material comprises the following steps that an organism rawmaterial, including green plants, shells of shellfish, organs of molluscs and / or cell walls of fungi, is dispersed in an aqueous solution prepared from a peroxydisulfate activating system and an advanced oxidation technology system for hydrolysis reaction after being crushed to obtain hydrolysate; the hydrolysate is subjected to post-treatment to obtain the bio-based nanometer material; the peroxydisulfate activating system is prepared from a peroxydisulfate-containing agent and a peroxydisulfate activating agent; the advanced oxidation technology system is prepared from hydrogen peroxide andan agent for making the hydrogen peroxide generate hydroxyl radicals. The preparation method of the bio-based nanometer material is high in preparation efficiency, high in reaction speed and low in preparation cost. The invention further provides the bio-based nanometer material prepared through the method.
Owner:QINGDAO UNIV OF SCI & TECH
Method and device for preparing glyoxylic acid by multistage reaction
ActiveCN103880651AThe reaction system is stableRespond completelyOrganic compound preparationCarboxylic compound preparationChemistryExhaust fumes
The invention relates to a chemical synthesis method for glyoxylic acid, and in particular to a method and a device for preparing glyoxylic acid by multistage reaction. According to the method disclosed by the invention, the tail gas generated by a first reactor is directly charged in a second reactor, and the effective constituents in the tail gas are recycled, thus a reaction system in the second reactor is more stable, the reaction is more complete, the conversion rate and yield are remarkably increased, and the unit consumption of the main raw material, that is, glyoxal is reduced; the tail gas is directly recycled, so that the recycling rate of the raw materials is increased, and the unit consumption of nitric acid and hydrochloric acid of the whole system, and the yield of waste gas are obviously reduced; the yield of waste gas is reduced and the contents of harmful substances in the waste gas are lowered simultaneously, so that the waste gas treatment steps are simplified.
Owner:HUBEI HONGYUAN PHARMA
Dust suppressant for mineral powder and preparation method of dust suppressant
InactiveCN108929657AGood weather resistanceImprove securityOther chemical processesWeather resistanceSilica gel
The invention relates to a dust suppressant for mineral powder and a preparation method of the dust suppressant. The dust suppressant is obtained by preparing a polymer hydrosol through a copolymerization technique by using an ionic monomer and a nonionic monomer as raw materials, and performing mixing on the polymer hydrosol and a silica sol. According to the dust suppressant provided by the invention, the polymer hydrosol has a low particle size and better bonding ability to the mineral powder; and the silica sol improves cohesive force of the organic polymer, and the shell layer formed by the silica sol has better weathering resistance.
Owner:加翎加(天津)环境科技有限公司
Computer anti-radiation film material and preparation method thereof
The invention provides a computer anti-radiation film material and a preparation method thereof. The computer anti-radiation film material is prepared from the following components: polycarbonate, modified kaolin, barite powder, cellulose, titanium dioxide, mica powder, zinc ore, calcium carbonate, graphene, composite emulsion, polypropylene glycol, a coalescing agent, an additive, a thickener anddeionized water. The anti-radiation film material prepared by the preparation method provided by the invention not only can greatly improve the anti-radiation effect to reduce harm to human body caused by radiation, but also has the characteristics of waterproofing property, high permeability and relatively good heat dissipation effect; moreover, the anti-radiation film material guarantees normalrunning of a computer, offers safety guarantee for the computer user, and effectively reduces the harm caused by radiation, and thus has relatively high value in use.
Owner:HEFEI XINYADA INTELLIGENT TECH CO LTD
Zinc-doped indium oxide powder, sputtering target material and preparation method thereof
PendingCN113956022AHigh purityUniform distribution of crystal formsVacuum evaporation coatingSputtering coatingIndiumPhysical chemistry
The invention provides zinc-doped indium oxide powder, a sputtering target material and a preparation method thereof, and belongs to the technical field of new materials. The precursor powder of the zinc-doped indium oxide is synthesized in one step by adopting a hydrothermal method, the reaction system is stable, and the obtained zinc-doped indium oxide powder is high in purity, uniform in crystal form distribution, good in dispersity and high in crystallinity; the sputtering target material obtained after the powder is sintered is small in grain size, uniform in distribution and high in density. The whole process from powder preparation to forming and sintering is simple and convenient, low in cost and suitable for industrial production.
Owner:ZHENGZHOU UNIV
Method for preparing monosaccharide by raw materials containing cellulose
A method which uses cellulose-containing raw materials for preparing monosaccharide comprises the steps as follows: the raw materials which contain cellulose is carried out steam blasting; a product which is obtained by steam blasting is mixed with enzyme and then experiences enzymolysis, wherein, the method which leads the steam blasting product to be mixed with the enzyme comprises: firstly, a first batch of steam blasting products are mixed with the enzyme for obtaining a mixture; and then the remaining steam blasting products are continuously added to be mixed with the mixture; the speed for adding the remaining steam blasting products causes the concentration of the steam blasting products in a reaction system not to be higher than 150 grams / liter; the weight of the first batch of steam blasting products which are mixed with the enzyme is10-30% of the total steam blasting products; the water content of the raw materials which contain cellulose is 30-60%. The method can effectively improve the sugar conversion rate of raw materials, namely the yield of monosaccharide; in addition, the method of continuously supplementing materials can also significantly shorten the enzymolysis time and improve the enzymolysis efficiency.
Owner:COFCO GROUP
A high water-reducing and high-early-strength polycarboxylate water-reducing agent and its non-pyrogenic preparation method
ActiveCN105130269BRealize the dual functions of high water reduction and high early strengthShorten the setting timeDefoaming AgentsMaterials science
Owner:大连华建科技有限公司
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