31results about How to "Uniform hydrolysis" patented technology

A preparation method for high-purity alumina powder includes: preparing aluminum alkoxide in liquid state at the room temperature by means of reaction of metallic aluminum with sec-butyl alcohol, using the reduced pressure distillation method for purifying, and preparing the high-purity alumina powder by means of hydrolyzing, reduced pressure distillation and calcinations. Using the method to prepare high-purity alumina powder has the advantages of simple preparation process, no pollution, low energy consumption, fine operating conditions, zero emission and the like. The alumina powder prepared by the method is applicable to the field of catalysts and can also be applied to the fields of laser crystals, sapphires, transparent alumina ceramics, sodium lamps, metal halides, high-grade abrasives and the like.

The invention discloses a method for controlling the particle diameter of decorative body paper titanium dioxide, and belongs to the technical field of decorative body paper titanium dioxide. Through the control of a hydrolysis working procedure, the method comprises the following steps: A: selecting titanium sulfate solution, preheating to 96-98 DEG C for standby use, and preheating desalted water to be boiling for standby use; B: firstly, adding the desalted water which is preheated to be boiling into a hydrolysis reactor to be stirred, then, adding the preheated titanium sulfate solution, stirring after the titanium sulfate solution finishes adding, and heating to raise temperature to slight boiling; C: after a hydrolysis rate of step B achieves 50-65%, stopping stirring and heating, and carrying out curing; D: after curing is carried out, stirring again, heating and raising temperature to slight boiling, and carrying out hydrolysis for 160-180min; E: adding the boiling desalted water, controlling total titanium concentration TiO2 in slurry to be 160-180g / L, keeping the slight boiling, and carrying out hydrolysis for 50-60min. According to the method disclosed by the invention, a titanium sulfate solution pyrohydrolysis technology is implemented by meeting body paper requirements, water and titanium dioxide particle diameter are even, and the method conforms to the hydrolysis technology specially designed for the particle diameter requirement of the decorative body paper titanium dioxide.

The invention relates to a preparation method of mannose oligosaccharides. The method comprises the following steps: performing high-pressure fluid nano homogenization treatment on a galactomannan solution, adding acetic acid, and performing a degradation reaction; or, the method further comprises the steps of after the degradation reaction is completed, performing reduced-pressure concentration to recover the acetic acid, and performing spray drying on the concentrate to obtain the mannose oligosaccharides. According to the method provided by the invention, the galactomannan is subjected to homogenization by a high-pressure fluid nano homogenizer, the acetic acid is directly added for hydrolysis, so that the hydrolysis is uniform, and the hydrolysis speed is fast; compared with inorganicacids such as hydrochloric acid, sulfuric acid and trifluoroacetic acid, the acetic acid belongs to organic acids, has less corrosion to equipment and is easy to recycle; and the method can improve the production efficiency of the mannose oligosaccharides and improve the selectivity of the product, and has good industrial application prospects.

The invention discloses a method for preparing a high-strength aluminum oxide foamed ceramic and belongs to the technical field of porous materials. The method comprises the following steps: mixing deionized water with polyvinyl alcohol solution in a mass ratio of (5:1)-(5:2), adding absolute ethyl alcohol which is 0.1-0.2 time of the mass of the deionized water, ammonium polyacrylate which is 0.1-0.2 time of the mass of the deionized water and alumina powder which is 0.3-0.4 times of the mass of the deionized water, carrying out ball milling and mixing so as to obtain a mixed blank material,mixing the mixed blank material with a hydroxymethyl cellulose solution according to a mass ratio of (8:1)-(10:1), adding an additive which is 0.3-0.5 time of the mass of the mixed blank material, stirring and mixing, injecting into a mold, carrying out heat-preservation curing, and calcining, thereby obtaining the high-strength aluminum oxide foamed ceramic. The high-strength aluminum oxide foamed ceramic prepared according to the technical scheme of the invention is uniform in pore size, has the characteristics of being high in strength under a high porosity condition, and has wide prospectsin development of the porous material technique industry.

The invention discloses a salt-resistant drag-reduction agent polymer, and synthetic technology thereof. The salt-resistant drag-reduction agent polymer comprises, by weight, 320-360 parts of pure water, 0.1-0.3 part of Edta-2Na, 35-45 parts of sodium bicarbonate, 18-22 parts of acrylic acid, 8-12 parts of AMPS, 75-85 parts of acrylamide, and 14-18 parts of urea. The synthetic technology is simplein operation; product quality is stable; and environment pollution influence is extremely low. The salt-resistant drag-reduction agent polymer possesses advantages such as high dissolving speed, temperature resistance, salt resistance, shearing resistance, excellent compatibleness, and high drag reduction rate, is mainly used for reduction of conveying resistance force in shale hydrocarbon reservoir and compact sandstone hydrocarbon reservoir pressing crack construction and other fluid pipelines, enlarging discharge amount, and reducing power consumption.

The invention relates to a method for extracting leucine by utilizing corn protein powder. The method is characterized by comprising the steps of 1, hydrolysis stage of the corn protein powder; 2, preparation stage of leucine crude product I; 3, preparation stage of leucine crude product II; 4 preparation stage of leucine finished product. The method for extracting the leucine by the utilizing corn protein powder takes the corn protein powder as a production raw material, and the corn protein powder is lower in price, so that the production cost is greatly lowered. Furthermore, the product prepared by the method is high in purity, and the production technological conditions are simple, so that the method is more suitable for large-scale production and use.

The invention provides an industrial production method of icodextrin. The industrial production method comprises steps as follows: a, an acid solution with the concentration of 0.3%-1.5% is prepared; b, 1,000 parts by weight of the acid solution are taken, 400-450 parts by weight of corn starch are added to the acid solution during stirring, the mixture has a hydrolysis reaction for 1-2 h at the hydrolysis temperature of 90-95 DEG C, and then pH is regulated to 5-7, and a hydrolysis product is obtained; c, the hydrolysis product prepared in the step b is cooled to 55-60 DEG C, 12-13.5 parts by weight of activated carbon is added, decoloration is performed for 0.5-1 h, and filtration is performed after decoloration; d, a filtrate prepared in the step c is subjected to ultrafiltration and drying, and icodextrin is obtained. According to the industrial production method of icodextrin, the preparation process is simple, the production cost is low, a prepared product has good quality, and the industrial production method is applicable to industrial mass production of icodextrin.

The invention provides an energy-saving hydrolyzer and method for preparing polyacrylamide polymers by a post-hydrolysis method. The hydrolyzer includes a stirring device, and the direct power of the stirring device of the hydrolyzer is provided by a hydraulic device. The invention also provides a method for producing polyacrylamide polymers by using the energy-saving hydrolyzer. Utilizing the hydrolyzer of the invention to produce polyacrylamide polymers can save energy and reduce consumption, and reduce production costs.

The invention discloses a method for carrying out magnetic nano ferroferric oxide modification based on wool fibers. Organic degradation liquid containing rich amino acid is prepared and then added into a ferroferric oxide precursor solution, nano ferroferric oxide crystallization and settling are carried out, and finally modified nano ferroferric oxide is obtained through filtering, washing and drying. By adding a certain amount of wool fiber degradation liquid, hematite ferroferric oxide nanopaticles for wrapping organic ingredients can be prepared, the clustering phenomenon of generated magnetic nano ferroferric oxide can be avoided, the particle size is small, the ferroferric oxide is uniformly distributed, damage to the crystal structure of ferroferric oxide can be avoided, an organic film wrapped by magnetic nanopaticles on the surface can achieve certain thickness, and combination is firm; meanwhile, ferroferric oxide can be prevented from being oxidized, the adsorption performance on heavy metal ions is good, and ferroferric oxide can be repeatedly used. The preparing method is simple, efficient and free of pollution to the environment.

The invention discloses a preparation method of titanium dioxide / hollow microsphere composite particles. In this method, a hydrophilic alkaline ionic liquid is used to replace the water+alkali system, so that the reaction has a more stable hydrolysis rate. Bead dispersion and surface titania adsorption film formation. The composite particle filler prepared by the above method has good titanium dioxide dispersion and film-forming properties, improves coating uniformity, and has obvious heat insulation effect.

The present invention discloses a preparation method of a lithium battery composite powder body material with a stable structure, belonging to the technical field of new energy materials. The method comprises the steps of: performing reaction of a pretreated oxidized graphene dispersion liquid, a melamine solution and a modified gelatin dispersion liquid to prepare xerogel, performing smashing andscreening of the xerogel to obtain hydrogel crushed aggregates, and performing heating reflux reaction of the hydrogel crushed aggregates, the silicate ester diluent, trimethylaluminum and oleic acidto prepare ordered load hydrogel crushed aggregates, and performing mixed reaction of the ordered load hydrogel crushed aggregates and an ammine silver solution, performing hydrazine hydrate reduction to prepare a reduction material, and finally controlling different temperature rise rates and processing rates to perform high-temperature reaction of the reduction material to prepare a lithium battery composite powder body material with a stable structure. The product prepared in the invention is stable in structure in the use process, effectively avoids decreasing of the performances due to volume expansion, effectively improves the service life, the use safety and the cycle stability of the product and forms a push effect on development of the new energy field.

The invention discloses a hydrophobic associated polymer and a synthesis process. The hydrophobic associated polymer is characterized by including, by weight, 320-360 parts of pure water, 0.25-0.75 part of ethylene diamine tetraacetic acid (EDTA-2Na), 25-35 parts of baking soda, 18-22 parts of acrylic acid, 12-18 parts of potassium chloride, 95-105 parts of acrylamide, 15-20 parts of urea and 25-30 parts of a monomer, wherein the EDTA-2Na has the sand carrying property of 2+ / -0.1 hours, the sedimentation smaller than 20%, the dry powder content of 0.25% and the viscosity of 21-27. Compared with the prior art, the hydrophobic associated polymer is simple in operation, low in production cost, stable in product quality and extremely low in environmental pollution effect. Meanwhile, the hydrophobic associated polymer has the advantages of being wide in raw material source, simple in production and operation, low in cost, small in influences on the environment, stable in product quality, high in dissolubility, resistant to temperature and salt, resistant to shearing, high in viscosity and the like and can be suitable for medium-and-low-temperature oil and gas reservoir fracturing construction and three-time oil production.

The invention discloses a method for controlling the particle diameter of decorative body paper titanium dioxide, and belongs to the technical field of decorative body paper titanium dioxide. Through the control of a hydrolysis working procedure, the method comprises the following steps: A: selecting titanium sulfate solution, preheating to 96-98 DEG C for standby use, and preheating desalted water to be boiling for standby use; B: firstly, adding the desalted water which is preheated to be boiling into a hydrolysis reactor to be stirred, then, adding the preheated titanium sulfate solution, stirring after the titanium sulfate solution finishes adding, and heating to raise temperature to slight boiling; C: after a hydrolysis rate of step B achieves 50-65%, stopping stirring and heating, and carrying out curing; D: after curing is carried out, stirring again, heating and raising temperature to slight boiling, and carrying out hydrolysis for 160-180min; E: adding the boiling desalted water, controlling total titanium concentration TiO2 in slurry to be 160-180g / L, keeping the slight boiling, and carrying out hydrolysis for 50-60min. According to the method disclosed by the invention, a titanium sulfate solution pyrohydrolysis technology is implemented by meeting body paper requirements, water and titanium dioxide particle diameter are even, and the method conforms to the hydrolysis technology specially designed for the particle diameter requirement of the decorative body paper titanium dioxide.

A kind of TiO 2 / WO 3 The preparation method of composite powder is to mix titanium sulfate, urea, ethanol, and deionized water evenly, then add acetylacetone, and stir evenly at room temperature to obtain solution A; add concentrated nitric acid to solution A to obtain solution B; K is 0.1~0.3mol / L 2 WO 4 aqueous solution, and then adjust the pH value to 1 to 3.5 to obtain solution C; mix solution B and solution C for hydrothermal reaction to obtain TiO 2 / WO 3 Composite powder. In the present invention, due to titanium sulfate, K 2 WO 4 ·2H 2 O and the like are raw materials, and the price is low, so the preparation cost is low. In the present invention, a solution containing Ti and W is prepared first, and the product can be obtained by a one-step hydrothermal method, which has the advantages of low reaction temperature and short cycle. Due to the adoption of the hydrothermal method, the present invention can prepare TiO with controllable morphology, high purity, fine particles and relatively uniform particle size. 2 / WO 3 Composite powder.

The invention discloses a hydrophobic association polymer and a synthesis process, which is characterized in that the parts by weight of each raw material are: 320-360 parts of pure water, 0.25-0.75 parts of disodium ethylenediamine tetraacetate (Edta-2Na), baking soda 25-35 parts, 18-22 parts of acrylic acid, 12-18 parts of potassium chloride, 95-105 parts of acrylamide, 15-20 parts of urea, 25-30 parts of monomer, among which, Edta-2Na sand-carrying property 2±0.1 h settlement is less than 20%, dry powder 0.25% viscosity 21‑27. Compared with the above-mentioned prior art, the invention has simple operation, low production cost, stable product quality and extremely low impact on environmental pollution. At the same time, the invention has the advantages of wide source of raw materials, simple production operation, low cost, and little impact on the environment; stable product quality, good solubility, temperature and salt resistance, shear resistance, high viscosity, etc., and can be applied to medium and low temperature oil and gas reservoir fracturing Construction and EOR.

The invention relates to a preparation method of mannose oligosaccharides, which comprises: performing high-pressure fluid nano-homogeneous treatment on a galactomannan solution, and then adding acetic acid to perform a degradation reaction; or further comprising concentrating under reduced pressure after the degradation reaction is completed Acetic acid is recovered, and the concentrated solution is spray-dried to obtain mannose oligosaccharides. In the invention, the galactomannan is homogenized by a high-pressure fluid nanometer homogenizer, and then directly hydrolyzed by adding acetic acid, so that the hydrolysis is uniform and the hydrolysis speed is fast. Compared with inorganic acids such as hydrochloric acid, sulfuric acid, and trifluoroacetic acid, acetic acid is an organic acid, which is less corrosive to equipment and easy to recycle. The method of the invention can improve the production efficiency of the mannose oligosaccharide and product selectivity, and has good industrial application prospects.

The invention relates to a method for preparing a (Zn,Cd)S quantum dot, which comprises the following steps of: (1) dissolving soluble salt of zinc or / and and cadmium and thioacetamide raw materials into water or water-ethanol mixed liquor and adjusting a pH value to weak acidity with weak acid to obtain homogeneous reaction system mother liquor; and (2) transferring the homogeneous reaction system mother liquor obtained in the step (1) into a hydrothermal reactor for automatically generating pressure for sealing, heating to 70-100 DEG C and reacting for 30minutes to 24 hours to obtain the (Zn,Cd)S quantum dot. Compared with the prior art, the invention has the advantages of low cost, controllable process and product property, high uniformity, energy saving, high efficiency, pure water phase preparation and environmental protection.

The invention provides a method for preparing a protein polypeptide re-tanning agent. The method comprises the following steps: chrome leather waste is placed into an aqueous solution dissolved with calcium lignosulphonate and sodium hydroxide, subjected to hydrolysis reaction at a temperature of between 100 and 110 DEG C, and subjected to temperature reduction after hydrolysis reaction; and the pH value of the mixture is adjusted to between 6.5 and 7.5, and the protein polypeptide re-tanning agent is obtained, wherein the mass ratio of the chrome leather waste to the calcium lignosulphonate to the sodium hydroxide is 3.5-4.0 to 1.6-1.9 to 1. The method has the advantages that the adequate hydrolysis technology is adopted, and products obtained by hydrolysis of collagen are more stable and more simple and convenient to use, and are difficult to delaminate; and due to addition of the calcium lignosulphonate, the method is favorable for dispersing the chrome leather waste into a sodium hydroxide aqueous solution, promoting hydrolysis of the chrome leather waste, making the hydrolysis reaction tend to be consistent, causing the molecular weight of hydrolysis products to be controlledwithin a small range between 5,000 and 10,000, realizing uniform hydrolysis of the collagen of the chrome leather waste, and making the final products stable, difficult to delaminate and having better re-tanning function.

The invention relates to a buffer pool for the hydrolysis of small-granular organic wastes. The buffer pool comprises a first-level buffer pool, a second-level buffer pool and a third-level buffer pool, wherein the first-level buffer pool and the second-level buffer pool are used for storing organic wastewater, the third-level buffer pool is used for carrying out the hydrolysis on the organic wastewater, the first-level buffer pool and the second-level buffer pool are connected by a separating wall, an electric gate valve is arranged on the separating wall, the bottom of the second-level buffer pool is provided with a submersible sewage pump, the submersible sewage pump is connected with the third-level buffer pool by a pipeline, and a heat supply device is arranged in the third-level buffer pool; and the volume of the second-level buffer pool is greater than the wastewater quantity produced by an organic wastewater source in the hydrolysis cycle of the organic wastewater. According to the buffer pool, due to the arrangement of the three levels of buffer pools, the first-level buffer pool and the second-level buffer pool can be used for storing and accommodating the newly produced wastewater, and the third-level buffer pool can be used for carrying out the hydrolysis on the organic wastewater, so that the newly produced wastewater can be separated from the wastewater which is being hydrolyzed, so that the sufficient hydrolysis of the organic wastewater is ensured, and the effect of late anaerobic digestion is ensured.

The invention discloses a salt-resistant drag reducer polymer and a synthesis process, which is characterized in that the parts by weight of each raw material are: 320-360 parts of pure water, 0.1-0.3 parts of Edta-2Na, 35-45 parts of baking soda, and 18 parts of acrylic acid —22 parts, AMPS 8-12 parts, acrylamide 75-85 parts, urea 14-18 parts. The invention has the outstanding advantages of simple production operation, stable product quality and extremely low impact on environmental pollution. At the same time, the product technical indicators have the advantages of fast dissolution, temperature and salt resistance, shear resistance, good compatibility, high drag reduction rate, etc., and are mainly used to reduce fracturing construction and other fluid pipeline transportation in shale oil and gas reservoirs and tight sandstone oil and gas reservoirs Resistance, play the role of increasing displacement and reducing power consumption.

The invention discloses a preparation method of a porous ceramic membrane, which belongs to the technical field of inorganic non-metallic materials. In parts by weight, weigh in order: 15-35 parts of alumina powder, 4-10 parts of polyvinyl butyral, 5-12 parts of plasticizer, 8-12 parts of ethyl orthosilicate, 10-10 parts 15 parts of fatty acid, 5-8 parts of dispersant, 3-6 parts of surfactant, 8-18 parts of modified silica and 40-60 parts of ethanol, mix alumina powder with modified silica, and add Ethyl orthosilicate, fatty acid, surfactant and dispersant are used to obtain a pretreatment film-forming liquid, which is mixed with polyvinyl butyral, and a plasticizer is added to obtain a film-forming liquid. The membrane solution is cast into a membrane and sintered to obtain a pretreated porous ceramic membrane; the pretreated porous ceramic membrane is pickled, filtered, washed, and dried to obtain a porous ceramic membrane. The porous ceramic filter membrane provided by the invention has excellent bending strength, and the uniformity of pore size distribution is improved.

The invention discloses a preparation method of nano zirconium dioxide, which belongs to the technical field of nano material preparation. Mix the zirconium alkoxide mixture with ethylene glycol at a mass ratio of 1:1 to 2:1, and add the modified nanofiber membrane 0.2 to 0.4 times the mass of the zirconium alkoxide mixture and 0.01 to 0.02 times the mass of the zirconium alkoxide mixture Sulfuric acid, after stirring and reacting, filtering, washing, and drying to obtain nano-zirconia blanks; calcining nano-zirconia blanks to obtain pretreated nano-zirconia, and pre-treated nano-zirconia and sodium hydroxide solution according to the mass ratio 1:5~1:10 mixing, filtering, washing until the washing liquid is neutral, drying to obtain nano zirconia. The particle size distribution range of nano zirconium dioxide obtained in the present invention is narrow, and has a small size, so it has excellent dispersibility and is not easy to agglomerate in the preparation process.