11results about How to "Strong alkaline" patented technology

The invention belongs to the technical field of quartz sand preparation, and discloses high-purity quartz sand and a preparation method thereof. The method comprises the following steps: by taking water, mixed alkali and silicon powder as raw materials, uniformly stirring the silicon powder, the water and an additive to prepare silicon sludge, adding the rest raw materials into a reaction kettle, heating, then adding the silicon sludge into the reaction kettle in a frequency division manner, reacting to obtain a sodium silicate solution, removing anion and cation impurities, then adding an acid solution, heating to obtain silicic acid gel, and drying to obtain the silica gel. The silicic acid gel is subjected to freezing treatment, vacuum microwave drying and chloridizing roasting after unfreezing are conducted, and the high-purity quartz sand is obtained. According to the preparation method, the quartz sand with the purity higher than 99.9999% can be synthesized, the granularity of the quartz sand can be controlled according to the adding proportion of the acid solution, the content of gas-liquid inclusion in the quartz sand is remarkably reduced, and the quality of the quartz sand is improved.

The present invention relates to a cresol preparation method, wherein DTE, a byproduct produced by the cresol preparation method, is separated and recycled to a reaction step, thereby inhibiting the production of DTE. The cresol preparation method according to the present invention is a process in which a cresol is prepared by a reaction of halo-toluene and a basic aqueous solution, and the method comprises a step of separating DTE, a byproduct of the process, and re-feeding DTE to the reaction step of halo-toluene and the basic aqueous solution.

The invention discloses porous adsorption resin for silane purification and a preparation method of the porous adsorption resin, and belongs to the technical field of silane production. The porous adsorption resin is prepared from the following components in parts by weight: 100 to 200 parts of deionized water, 10 to 30 parts of modified mesoporous magnetic particles, 20 to 40 parts of acrylic resin monomer, 5 to 15 parts of N, N-methylene bisacrylamide, 10 to 20 parts of polypropylene glycol monomethyl ether acrylate and 20 to 50 parts of initiator aqueous solution. The prepared porous adsorption resin can efficiently remove chloride ions and metal impurities in silane, the purity of a silane product is improved, the product purity can reach 99.998% or above, the requirement for the purity of silane in the high-end application field is met, good adsorption stability is achieved, bonding between the adsorption resin and the silane impurities is firmer, and the service life of the adsorption resin is prolonged. According to the present invention, the high adsorption capacity can be maintained after the multi-time cycle use, such that the purification precision and the purification effect are improved due to the appropriate pore size distribution, the selectivity on the impurity adsorption is provided, and the targeted adsorption can be performed according to the size and the property of the impurity molecule.

This invention provides an absorbent for capturing carbon dioxide and a method for capturing carbon dioxide. By volume percentage, the absorbent comprises 20-60% glycine salt aqueous solution, 10-50% triethylene glycol monomethyl ether, 5-10% ethylene glycol, and the balance being water. This absorbent combines the advantages of glycine salt systems, such as low volatility, non-toxicity, safety, and better antioxidant degradation resistance, while avoiding the risk of solid precipitates forming after absorption by the glycine salt system, which could cause pipeline blockage.

The invention relates to a rice seedling substrate and a preparation method thereof, and belongs to the technical field of agriculture. The rice seedling raising substrate comprises acidified plain soil and a conditioner, and the acidified plain soil is a mixture of an acid regulating agent and soda saline-alkali soil; wherein the acid regulating agent is acidified animal manure; the conditioner is a mixture of a bactericide, a chemical fertilizer and perlite; the pH value of the soda saline-alkali soil is 7.0-8.5; the volume ratio of the acidified animal manure to the soda saline-alkali soil is 1: (1-2). According to the application, the acidified animal manure is used as an acid regulating agent to be matched with the soda saline-alkali soil with the pH value of 7.0-8.5, so that the soil is reduced and the appropriate pH required by the growth of rice seedlings is kept for a long time, and then the perlite is added to improve the physicochemical properties of the saline-alkali soil and improve the water permeability and air permeability of the saline-alkali soil, so that the saline-alkali soil is suitable for rice seedling raising; the method successfully solves the problems of shortage of traditional seedling raising soil sources and damage to ecological environment in saline-alkali soil rice farming areas, and realizes alkaline soil seedling raising and cyclic utilization of alkaline canal soil and a large amount of animal manure resources.

This invention discloses a hierarchical guanidine resin-based CO2 adsorbent material and its preparation method, belonging to the field of polymer synthesis technology. The adsorbent material prepared by this invention has a composite spherical structure and a hierarchical pore structure, including micropores, mesopores, and macropores. By introducing a hierarchical pore structure, the adsorption capacity of the material for CO2 is effectively improved. The introduction of hierarchical pores can significantly reduce molecular diffusion resistance and increase the contact area between the adsorbent and CO2 molecules, thereby achieving rapid adsorption. Furthermore, pyridyl, polyamino compounds, and guanidine groups have strong basicity and chemical affinity for CO2. Through surface functionalization modification, the number of active sites on the material surface is significantly increased, thereby further improving the CO2 adsorption capacity and selectivity.

The present invention relates to an alkoxypropylamine compound and its application in organic sulfur absorption and removal. The compound has the following structural formula: #imgabs0# wherein R1 is a C1-6 alkyl substituent, and R2 is H or a C1-3 alkyl substituent. Compared with the prior art, the alkoxypropylamine compound of the present invention has a good deep removal effect on various types of sulfides, and the compound has stable chemical properties, is not easy to decompose, has a small bubble point vapor pressure, has little volatilization loss, is weak in alkalinity, and has light corrosion to equipment, and thus has a good industrial application prospect.

The invention relates to the technical field of slurry treatment, and particularly discloses an environment-friendly slurry dehydrating agent and a preparation method thereof. The environment-friendly mud dehydrating agent is prepared from the following raw materials in parts by weight: 10 to 20 parts of polysilicate, 4 to 8 parts of cationic polyacrylamide, 5 to 10 parts of modified lignin coagulant, 4 to 10 parts of sodium dodecyl benzene sulfonate, 10 to 15 parts of calcium oxide, 15 to 20 parts of polyaluminum chloride and 8 to 12 parts of diatomite. The preparation method of the environment-friendly slurry dehydrating agent comprises the following steps: mixing the polysilicate, the cationic polyacrylamide, the modified lignin coagulant, the sodium dodecyl benzene sulfonate, the calcium oxide, the polyaluminum chloride and the diatomite according to the proportion, and drying at 80-90 DEG C for 40-60 minutes to obtain the environment-friendly slurry dehydrating agent. The mud dehydrating agent prepared by the invention is good in mud dehydrating performance, green and environment-friendly, and good in application prospect.

The invention provides a method for detecting large particles in fine talcum powder, and belongs to the technical field of talcum powder particle size detection.The detection method comprises the following steps that talcum powder is added into an ethanol solution and stirred, and a mixed solution is obtained; a dissociation agent is added into the mixed solution, the dissociation agent is a mixture of a low-foam penetrant, sodium bicarbonate and a synergistic aid, the mixture is heated to 40-45 DEG C and stirred, then the mixture is heated to 60-70 DEG C and stirred, and dispersion liquid is obtained; and preparing a to-be-tested sample from the dispersion liquid, and detecting and analyzing the content of large particles. The detection method provided by the invention focuses on the difficult problem of accurate detection of large particles in the fine talcum powder, can effectively improve the dispersion performance of the talcum powder, and avoids the misjudgment of aggregates on the content of large particles, thereby efficiently and accurately detecting the content of large particles in the fine talcum powder.

The invention discloses a pyridine [3, 2-d] pyrimidine-2-amine derivative as well as a preparation method and application thereof. The pyridine [3, 2-d] pyrimidine-2-amine derivative can be used as a TLR7 / 8 dual agonist and is used for treating diseases related to TLR activity, such as diseases, tumors, inflammatory diseases and the like caused by virus (such as HBV (Hepatitis B Virus) and HIV (Human Immunodeficiency Virus)) infection. Particularly, the pyridine [3, 2-d] pyrimidine-2-amine derivative provided by the invention has better physicochemical properties, druggability, heart safety and oral bioavailability, and has very good research and application values in the field of medicines.

The invention relates to a preparation method of an all-solid-state lithium battery positive electrode material. According to the method, the polyaniline derivative and the organic sulfide are compounded, so that the compatibility of the polyaniline derivative and the organic sulfide is better than that of polyaniline, and the interaction of a molecular level is achieved. Part of nitrogen-substituted polyaniline is used, the alkalinity of the polyaniline is higher than that of polyaniline, a better catalytic effect on organic sulfides is achieved, and the positive electrode material with higher catalytic energy than that of polyaniline can be obtained. In an organic solvent such as N-methyl pyrrolidone, a composite solution of a polyaniline derivative and an organic sulfide is prepared, and conductive carbon black is added. The composite solution is coated or brushed on the surface of a current collector, such as copper, aluminum, platinum or stainless steel, so that the lithium secondary battery positive electrode with high specific energy is obtained. The method is simple to operate, is suitable for the field of high-specific-energy lithium batteries, and has a wide application prospect.