101results about How to "The reaction system is stable" patented technology

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.