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 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 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 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.