55results about How to "Slow hydrolysis" patented technology

A process for preparing iron oxide red pigment from ferrous sulfate as the by-product of titanium oxide includes such steps as reducing iron scale at 50-70 deg.c, hydrolyzing for 6-10 hr, flocculating, deposition, refining heptahydrated ferrous sulfate, neutralizing with ammonia to generate crystal seeds, and neutralizing with ammonia while oxidizing with air to obtain target product. Its by-product, solution of ammonium sulfate, can be used for preparing composite fertilizer.

A process for preparing iron oxide yield pigment from ferrous sulfate as the by-product of titanium oxide includes such steps as reducing iron scale at 50-70 deg.c, hydrolyzing for 6-10 hr, flocculating, deposition, refining ferrous sulfate, neutralizing with ammonia to generate crystal seeds, and neutralizing with ammonia while oxidizing with air to obtain target product. Its by-product, solution of ammonium sulfate, can be used for preparing composite fertilizer.

The invention relates to a method for synthesizing glycol ether ester. The method comprises the following steps that: glycol ether and fatty acid as raw materials are directly esterified and synthesized into glycol ether acetic ester at a temperature of between 80 and 180 DEG C in the presence of an acidic catalyst and an azeotropic dehydrating agent; and the acidic catalyst is paratoluenesulfonic acid or methanesulfonic acid, and dosage of the catalyst is 0.05 to 1 percent of total weight of reaction materials. The method is characterized in that the mol ratio of the fatty acid to the glycol ether is 1.0:0.8-1.5; and the azeotropic dehydrating agent is isobutyl acetate or 2-butanol acetate, and dosage of the azeotropic dehydrating agent is 5 to 30 percent of the total weight of the reaction materials. The method has the advantages that compared with butyl acetate, the azeotropic dehydrating agent used in the reaction has a lower boiling point and a lower azeotropic point, smaller solubility and lower hydrolysis speed, so that energy consumption during reacting and reclaiming the azeotropic dehydrating agent can be reduced, the reaction speed is improved, and water entrainment of a side product is reduced.

The invention discloses a titanium dioxide / graphene nanocomposite, and a normal-temperature preparation method and application thereof. According to the invention, a titanium source and graphite oxide are used as starting raw materials, an organic solvent is used as a reaction solvent, and the nanocomposite formed by compounding of titanium dioxide nanometer rods and graphene is obtained through normal temperature reduction and hydrolysis; and in the nanocomposite, graphene accounts for 1 to 30 wt%, with the rest being titanium dioxide. The preparation method provided by the invention has the advantages of simple process, easy preparation, mild reaction conditions, etc. In the prepared nanocomposite, titanium oxide is uniformly distributed on the surface of graphene, so the nanocomposite can be perfectly applied to the field of photocatalysis of photoelectric materials.

The invention belongs to the technical field of agriculture microbes, and provides a high-density fermentation culture medium for haemophilus parasuis and a preparation method for the same. The culture medium comprises the following components in weight / volume: 10-30 g / L of yeast powder, 1-10 g / L of soybean peptone, 1-10 g / L of maltose, 2-10 g / L of NaCl and 1-10 g / L of K2HPO4, the following components in volume ratio: 0.001-0.010% of NAD (nicotinamide adenine dinucleotide) and 2-10% of bovine serum, and the balance of water, wherein the pH is 7.0-7.4. The culture medium disclosed by the invention is beneficial to high-density fermentation for haemophilus parasuis, capable of obtaining a high bacterial quantity in a short time, low in cost, and capable of being used for large-scale production for vaccines.

The invention provides a method for preparing RuO2-SnO2 oxide completely composed of nanoscale rutile phase by using RuCl3, SnCl2 and SnCl4 as precursors. The ratio of RuO2:SnO2 in the titanium anode coating prepared by the invention is 1:4-4 : 1, the surface coating of the titanium substrate is entirely composed of nanoscale rutile phase RuO2-SnO2 oxide or solid solution, and its specific surface area exceeds 460m2·g-1; and the raw materials are easy to obtain and the method is simple.

The invention discloses an aqueous epoxy modified silicon resin coating which consists of a basic resin and a cross-linking agent in a mass ratio of 100:(4-6), wherein the basic resin comprises the following components in parts by weight: 100-400 parts of a D monomer, 100-400 parts of a T monomer, 50-150 parts of a silane coupling agent, 100-200 parts of distilled water, 8-12 parts of a catalyst and 150-250 parts of a solvent. The temperature resistance of the aqueous epoxy modified silicon resin coating disclosed by the invention is not greatly degraded, the coating is a binary state cured product, can be cured within 6-8 hours even at room temperature, can be completely cured within 5-8 minutes at 100-120 DEG C and has the characteristics of being rapidly cured at high temperatures, andcompared with a common silicon resin product, the coating has the advantages that the construction efficiency is greatly improved, and the energy consumption is reduced.

The invention belongs to the field of biotechnology detection and relates to an antibody and magnetic bead directed coupling method. The method includes the following steps of: (1) magnetic bead pretreatment; (2) S-NHS treatment; (3) EDC treatment; and (4) antibody addition. With the method provided by the invention adopted, the directed coupling of antibodies and magnetic beads can be realized; the yield of effective antibodies is greatly improved; and the actual sensitivity and accuracy of detection are improved.

The invention relates to a method for producing biogas through mixing gibberellin fungus dreg and kitchen waste and carrying out anaerobic fermentation. The method comprises the steps: (1) removing relatively large hard impurities from the kitchen waste, carrying out uniform mixing, then, crushing the mixture by a crusher, and sieving the crushed mixture by a sieve with the grain size smaller than 5mm; adopting sludge rich in active methanobacteria as inoculation sludge, carrying out standing, removing supernatant, and adding the concentrated sludge into a mixed substrate at a starting stage of fermentation according to the ratio of 30g / L; (2) mixing the gibberellin fungus dreg with the kitchen waste, and enabling the C / N ratio to be (13 to 28): 1; (3) carrying out fermentation on the mixed substrate in a CSTR (Continuously Stirred Tank Reactor) while adjusting the temperature to 10 to 80 DEG C and the organic load to 1gVS / (L.d) to 10 gVS / (L.d), so as to degrade organic matters in a fermentation system and produce the biogas. According to the method, the nutrient mixing ratio of an anaerobic fermentation system is changed, the activity of the methanobacteria is guaranteed, and the anaerobic digestion rate of the gibberellin fungus dreg and the gas production rate of the system are increased; efficient operation for mixed fermentation is achieved, the bacterial activity is guaranteed, the anaerobic fermentation rate is increased, and the equipment is simple, economical and practical, so that the method is an environment-friendly treatment mode capable of changing wastes into valuables.

The invention discloses a method for preparation of TiO2 by steam hot solution evaporation. The method includes: dripping a titanium salt into an organic solvent, performing magnetic stirring and mixing, transferring the mixture into a standing quartz cup, then adding an organic solvent into a Hadtelloy alloy reaction kettle, and putting the standing quartz cup into the reaction kettle, carrying out steam hydrothermal reaction for 5h, then introducing cooling water to a condenser pipe in the reaction kettle to rapidly lower the temperature inside the kettle, after cooling to room temperature,taking out the product from the cup, when the product in the cup is in a solid state, performing levigating to obtain a TiO2 photocatalyst, and when the product in the cup is in a liquid state, conducting solid-liquid separation, then adding ethanol and performing washing, and then conducting drying in a vacuum oven to obtain the TiO2 photocatalyst. The TiO2 photocatalyst obtained by the method provided by the invention has the characteristics of excellent catalytic performance and simple and safe preparation process, and has good application prospects in the field of photocatalysis.

The invention discloses a polymer carrier for loading a perfume, a perfume precursor, and a preparation method and an application of the polymer carrier. The polymer carrier is a compound representedby formula (I), or its salt. The polymer carrier has stable properties in water when used for loading the perfume, and can release the perfume and has a good slow release effect under an acidic condition.

The invention provides glucamylase of which an amino acid sequence is SEQ ID NO:1. The invention discloses a glucamylase gene of gliocladium roseum for the first time. A shake flask fermentation experiment is carried out on recombinant bacteria, and the enzyme activity of a fermentation liquor can be up to 292U / ml. By adopting the glucamylase disclosed by the invention, an alpha-1,4-glucosidic bond can be efficiently decomposed from the non-reductive end of a carbohydrate chain, glucose can be hydrolyzed, and an alpha-1.6 glucoside bond also can be slowly hydrolyzed, and converted into the glucose, so as to be widely applied to the glucose industry.

The invention discloses feed capable of improving meat quality of white crucian carps. The feed is prepared from the following components: pheretima powder, poria cocos powder, extruded soybean, beer yeast, fish liver oil, wheat-middlings, radix lamiophlomidis rotatae, rhizoma curcumae longae, defatted rice bran, peanut meal, squid visceral ointmen, shrimp paste, spirulina powder, herba euphorbiae humifusae, radix scutellariae, cortex eucommiae, flos lonicerae, lecithin, fish oil and semen lini oil mixture, choline chloride, beta-dextranase, a feed attractant, a multi-vitamin compound and a mildew inhibitor. The invention also discloses a processing method of the feed. According to the feed and the processing method of the feed disclosed by the invention, the growth speed of the white crucian carps can be effectively improved, the breeding period is shortened, the sickness probability of the white crucian carps is reduced, and the survival rate of the breeding of the white crucian carps is improved; moreover, the feed attractant agent is added in the feed, so that the food intake of the white crucian carps can be obviously promoted and the growth is promoted; meanwhile, residual diets are reduced, so that environment protection is facilitated.

The invention belongs to the technical field of electrode material preparation, and particularly relates to a preparation method of a nitrogen-doped antimony-carbon composite material and applicationof the nitrogen-doped antimony-carbon composite material in a sodium-ion battery electrode. Potassium antimony tartrate is used as an antimony source, dopamine hydrochloride is used as a nitrogen source and a carbon source, a precursor is obtained through a liquid-phase reaction at room temperature, and then the nitrogen-doped antimony-carbon composite material is obtained through centrifugation,washing, drying and carbonization treatment. In the reaction process, the hydrolysis speed of antimony in a solution can be effectively controlled by controlling the pH value of the reaction solution,and meanwhile dopamine is subjected to a slow polymerization reaction to form polydopamine which coats the surface of a hydrolysate. After the precursor obtained by adopting the method is subjected to carbonization treatment, the antimony-doped carbon composite material uniformly distributed inside can be formed, and the volume increase of the electrode material can be effectively relieved in thecharging and discharging process of the battery, so that the sodium ion battery keeps relatively high specific capacity. The method is simple and rapid, does not need complex equipment, is low in cost and is suitable for mass production.

The invention relates to fibrinolytic enzyme of trimeresurus albolabris venom, and the preparation method and the application thereof in pharmaceutical industry, and belongs to the biomedical field. Trimeresurus albolabris venom fibrinolytic enzyme is metal protease obtained in the venom of the domestic trimeresurus albolabris through separation and purification, has the activity of simultaneously degrading fibrinogen Aalpha chain and fibrinogen Bbeta chain, and is 66300 dalton under the reducing and non-reducing conditions of the apparent molecular weight on polyacrylamide gel electrophoresis. The preparation method comprises the following steps: firstly, pretreatment of trimeresurus albolabris venom; secondly, DEAE-Sephadex A-25 ion-exchange chromatography; thirdly, DEAE-Sephadex G-100 gel chromatography; fourthly, CM-Sephadex C-25 cation-exchange chromatography. The fibrinolytic enzyme of the trimeresurus albolabris venom has higher activity of simultaneously degrading fibrinogen Aalpha chain and fibrinogen Bbeta chain, and can be applied for curing thromboembolic disease.

The invention discloses a preparation method of a titanium dioxide / hollow microsphere composite filler. According to the method, a reversed-phase microemulsion system is adopted, an organic titanium source is slowly hydrolyzed on an oil / water interface through ultrasonic oscillation formed by small-frequency-band ultrasound, the surfaces of the hollow microspheres can be better coated with titanium dioxide crystal nucleuses due to the fact that the titanium dioxide crystal nucleuses are generated on a water phase layer; meanwhile, the reaction speed is controlled through two-step temperature rising, and the higher titanium dioxide film forming effect is achieved. According to the composite filler prepared by the method, the coating uniformity of titanium dioxide on the surfaces of the hollow microspheres is improved, so that the filler has obvious reflection performance and heat insulation and heat preservation effects.

The invention discloses a method for preparing an organic-inorganic hybrid film. The method comprises the following steps: 1, diluting alkoxysilane in anhydrous ethanol, gradually dropwise adding appropriate amounts of deionized water and a weak acid or a weak base to adjust the pH value for hydrolysis, heating the obtained solution to 40-70 DEG C while sufficiently stirring, performing intense stirring at a constant temperature for 8-16 h to fully hydrolyze the solution, and cooling the hydrolyzed solution to room temperature; 2, adding a small amount of an organic polymer to the obtained solsolution to change the viscosity of the sol, and adding an appropriate amount of a plasticizer to adjust the plasticity of the sol; 3, coating a multilayer support with the sol in a dip-coating manner for 10 s; and 4, carrying out constant-temperature and constant-humidity drying on the coated multilayer support at a temperature of 20-50 DEG C and a humidity of 30-90% for 6-72 h, slowly raising the temperature to 200-500 DEG C, and calcining the multilayer support under the protection of an inert gas for 2-6 h to prepare the organic-inorganic hybrid film.

A process for preparing iron oxide red pigment from ferrous sulfate as the by-product of titanium oxide includes such steps as reducing iron scale at 50-70 deg.c, hydrolyzing for 6-10 hr, flocculating, deposition, refining heptahydrated ferrous sulfate, neutralizing with ammonia to generate crystal seeds, and neutralizing with ammonia while oxidizing with air to obtain target product. Its by-product, solution of ammonium sulfate, can be used for preparing composite fertilizer.

The invention belongs to the technical field of papermaking, and discloses a papermaking surface sizing agent emulsified by magnetic composite particles and a preparation method thereof. The preparation method disclosed by the invention comprises the following steps: (1), dispersing ferroferric oxide nano solid particles wrapped by silicon dioxide in water, uniformly stirring to obtain suspension, and adjusting the pH value of the suspension, thereby obtaining the suspension of the magnetic composite particles; (2), adding alkyl ketene dimer into a reaction kettle, adding polyvinyl alcohol again, heating till the additives become liquid, and stirring with heat preservation, thereby obtaining sizing oil and liquid of the modified alkyl ketene dimer; and (3), heating the suspension of the magnetic composite particles by water bathing, adding the sizing oil and liquid of the modified alkyl ketene dimer, mixing, and emulsifying with heat preservation, thereby obtaining the papermaking surface sizing agent emulsified by the magnetic composite particles. The papermaking surface sizing agent disclosed by the invention is steady in emulsion and high in sizing efficiency and can endow paper with the water-resisting property and the magnetism; a surface active agent is unnecessary to add in the method; the use amount of an emulsifier is low; the method disclosed by the invention is low in cost and pollution and short in maturing time.

The invention belongs to the field of inorganic material synthesis, and particularly relates to a lanthanum-cerium co-doped titanium oxide material based on mixed rare-earth carbonates, and a preparation method of the material. The method comprises the following steps: firstly, weighing a certain amount of a titanium-containing sulfate, dissolving the titanium-containing sulfate in distilled water, adding a mixed rare-earth carbonate solution with a controlled proportion, then adjusting the pH value of the system to be acidic, carrying out a reaction in a water bath, and then carrying out calcining in a muffle furnace, so that the hydrolysis growth, crystallization and effective doping of titanium oxide are realized, and the obtained nano material has excellent visible light catalysis performance. The method is simple in process and cheap in raw materials, is free of organic additives and organic titanium sources, and is low in environmental cost and high in product cost performance, large-scale industrial production can be realized, and the obtained product has a wide application prospect in the fields of photocatalytic degradation, organic pollutant treatment and the like.

The invention discloses a polyvinyl acetal foam material, a preparation method thereof and a cervical dilatation device. The preparation method comprises the following steps: (1) preparing polyvinyl acetal porous foam: mixing raw materials, and reacting the obtained mixture to obtain the polyvinyl acetal porous foam, wherein the raw materials consist of polyvinyl alcohol, water, a cross-linking agent, a pore-forming agent and an acidic catalyst; (2) cutting the foam; (3) drying the foam; and (4) carrying out compression molding. The polyvinyl acetal foam material has the advantages of smooth and defect-free macroscopic surface, high surface layer toughness, safety to use, good water absorption, high tensile strength and good resilience, and can be used as a cervix uteri expansion rod bodyfor the cervical dilatation device.

The invention belongs to the field of mineral-based composite materials, and particularly relates to a laminated composite material of anatase and montmorillonite obtained from the process of regulating montmorillonite micro layer recombination by means of an acid-base environment, and a preparation method thereof. Firstly, a titanium-containing precursor slurry with the pH value of 6-10 is dropped into an alkaline dispersion liquid of sodium-modified montmorillonite, then the pH value of the system is adjusted to be 3-6, a hydrothermal reaction is conducted at 120-220 DEG C so as to realize the crystallization of titanium oxide and the laminated and alternated assembly of montmorillonite microlayers and anatase, and the obtained composite has excellent catalytic and adsorption functions. The method has the advantages that the process is simple, raw materials are cheap, no organic additive or organic titanium source is used, calcination is not needed, the environmental cost is low, the cost performance of the product is high, large-scale industrial production can be realized, and the obtained product has broad application prospects in the fields like catalysis, adsorption and sewage treatment.

The invention discloses a surface chiseling protective coating for a hypersonic rocket sled slide rail and a preparation method thereof. The preparation method comprises the following steps: 1, pretreating the surface of a matrix; 2, preparing a PES / E51 / polyamide system in proportion; and 3, directionally and uniformly spraying the powder onto a metal matrix by adopting a directional spraying technology. The bonding strength of the coating and a metal matrix is high, the impact resistance is good, and the chiseling phenomenon on the sliding rail can be effectively relieved.

The invention belongs to the field of polymer materials and particularly relates to a method for improving viscosity of PTFE (polytetrafluoroethylene) dispersed emulsion. The method includes the steps of dissolving ammonium salt in deionized water to obtain ammonium salt solution, and adding the ammonium salt solution into the PTFE dispersed emulsion. The ammonium salt is one or combination of any of ammonium chloride, ammonium carbonate, ammonium bisulfate, ammonium bicarbonate, ammonium sulfate, ammonium bisulfite and diammonium hydrogen phosphate. The ammonium salt added accounts for 0.01-0.50% of the weight of the PTFE dispersed emulsion. The method has the advantages that the PTFE dispersed emulsion is an emulsifier-concentrated product produced at normal temperature, the problem that the PTFE dispersed emulsion normally produced may have low viscosity is solved, the proper amount of ammonium salt is added to the dispersed emulsion before mixing, the ammonium salt and the PTFE dispersed emulsion are blended according to different ratios, and the PTFE dispersed emulsions of different viscosities are produced.

The invention discloses a method for storing white spirits with a high alcoholic strength and drinking white spirits with a low alcoholic strength. The method comprises the following steps: packaging and storing white spirits with a high alcoholic strength; designing a container with an alcohol scale marker according to a special formula; then, injecting the white spirits with a high alcoholic strength into the container to reach the corresponding alcohol scale; and finally, injecting water-containing liquid to reach the required alcohol scale. According to the method, produced white spirits with a high alcoholic strength is packaged with small containers first and stored at the high alcoholic strength. When people want to drink the white spirits, the alcoholic strength of the white spirits can be conveniently, quickly and effectively reduced to any alcoholic strength lower than the high alcoholic strength by drinkers through simple operations, thus changing the white spirits with a high alcoholic strength into white spirits with a low alcoholic strength or alcoholic beverages with different tastes.

The invention relates to the technical field of water-soluble compound fertilizers, in particular to a potassium polyphosphate slow-soluble compound fertilizer as well as a preparation method and application thereof. The preparation method of the potassium polyphosphate slow-soluble compound fertilizer comprises the following steps: uniformly mixing a potassium source solution with phosphoric acid to obtain a neutralization solution; and conducting heating, dehydrating and polymerizing on the neutralized solution to obtain a molten glass body; and carrying out shock cooling, secondary cooling, crushing and screening on the glass body to obtain a solid potassium polyphosphate slow-soluble compound fertilizer. The potassium source comprises potassium carbonate and / or potassium hydroxide; the mass ratio of phosphoric acid to potassium carbonate is (7-9):(6-8); the mass ratio of phosphoric acid to potassium hydroxide is (7-9):(5-7); and the mass fraction of the phosphoric acid is 80-90%. According to the preparation method, specific raw materials are adopted, the specific material ratio is controlled, heating, dehydrating and polymerizing are conducted at a specific temperature, quenching, flaking, cooling and crushing are conducted to obtain the potassium polyphosphate slow-soluble compound fertilizer which contains specific components of phosphorus and potassium respectively accounting for 50% and has excellent performance.

The invention provides a cobalt-doped gel and a preparation method thereof. The preparation method is achieved by a sol-gel method combined with a technical route containing an acid catalytic hydrolysis and a base catalytic hydrolysis to prepare a cobalt-doped sol. The method is as below: preparing the raw materials of tetraethoxysilane and tributyl borate under the conditions of 60-70 DEG C, pH value of 3-5, and deionized water in substoichiometry into a silicon-boron sol; meanwhile, preparing a salt solution of alkali metal, aluminum and cobalt; adding the salt solution into the silicon-boron sol by multiple times, and further hydrolyzing the borosilicate sol under basic conditions to obtain a homogeneous cobalt-doped sol; and sealing the cobalt-doped sol and allowing to stand at 80-120 DEG C for gelation, aging and drying. By changing the composition and content of raw materials, the method can obtain the cobalt-doped gel with controllable compressive strength and half-life insurance of the cobalt-doped hollow glass microspheres.

The invention discloses a silane coupling agent, a preparation method and application thereof. The chemical name of the silane coupling agent is vinyl ethoxy ethyl dilactate silane, and the preparation method includes: carrying out stirring reaction on vinyl trichlorosilane and ethanol in a molar ratio of 1:1.1-1.2 at 100DEG C-110DEG C for 2-3h to obtain an intermediate; reacting the intermediatewith ethyl lactate at 150-160DEG C for 4-6h to obtain a crude product, wherein the molar ratio of vinyl trichlorosilane to ethyl lactate is 1:2-4; heating the crude product to 90-110DEG C, also conducting vacuum pumping to a vacuum degree ranging from -0.09MPa to -0.095MPa, and keeping a constant temperature and constant pressure for 2-3h, reducing the pressure, then adding magnesium powder to neutralize the crude product to neutral, and performing rectification to obtain the vinyl ethoxy ethyl dilactate silane. According to the method, hydrochloric acid generated in the reaction process is adsorbed with ammonia water with a concentration of 10wt%, thus preventing environmental pollution; after being added into an acrylic emulsion, the silane coupling agent not only can the improve performance of a paint film, but also can improve the storage stability of the emulsion, and is pollution-free after decomposition.