55results about How to "Slow hydrolysis" patented technology

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 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 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 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.

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 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 belongs to the field of inorganic material synthesis, and in particular relates to a lanthanum-cerium co-doped titanium oxide material based on mixed rare earth carbonate and a preparation method. First, weigh a certain amount of titanium-containing sulfate, dissolve it in distilled water, and mix it into the mixed rare earth carbonate solution in a controlled proportion, then adjust the pH value of the system to acidic, react in a water bath, and then calcined in a muffle furnace to achieve titanium oxide. The hydrolytic growth, crystallization and effective doping of the obtained nanomaterials have excellent visible light catalytic performance. The process is simple, the raw materials are cheap, no organic additives and organic titanium sources are used, the environmental cost is low, and the product is cost-effective, and large-scale industrial production can be realized. The obtained products have wide applications in the fields of photocatalytic degradation and organic pollutant treatment. prospect.

The invention provides a titanium dioxide-coated ferric oxide hollow microsphere composite material and its preparation method and application. The titanium dioxide-coated ferric oxide hollow microsphere composite material has a nano-core-shell structure, and its core is nanometer trioxide Iron hollow microspheres, the shell of which is a titanium dioxide coating layer, the preparation method comprises the following steps: dispersing the hollow microspheres of iron ferric oxide nanometer into an ethanol solution, and dispersing evenly to obtain a dispersion liquid; adding tetratitanate dropwise into the dispersion liquid butyl ester, and mixed evenly to obtain a mixed solution; add deionized water to the second container, place the first container containing the mixed solution in the deionized water, and transfer the second container as a whole to the reaction kettle , high-temperature heat treatment, and reacting to obtain a titanium dioxide-coated hollow ferric oxide microsphere composite material, so that the prepared titanium dioxide-coated ferric oxide composite material has a uniform and controllable morphology.