1126 results about "SODIUM SILICATE SOLN" patented technology

A process for preparing the amorphous Si-Al material by the carbonizing method includes such steps as adding part of sodium silicate solution to sodium aluminate solution, introducing CO2 gas to it for a certain time, adding the rest of sodium silicate solution while reacting, stabilizing, filtering, washing and drying. It can be used as the carrier of catalyst.

The invention relates to a method to withdraw silicon and aluminum in sequence from coal ash; a NaOH solution with a mass concentration larger than 40 percent is used for leaching the coal ash, the silicon of the coal ash is dissolved in the form of sodium silicate, and after being separated, sodium silicate solutions and alkaline leaching residues with a ratio between aluminum and silicone more than or equal to 2 are produced; the dissolved sodium silicate solution is condensed into sodium silicate solutions of different concentrations, or used for preparing white carbon through a carbonation method; the alkaline residues are used for producing Al(OH)3 through a sodalime sintering method or limestone sintering method and further producing Al2O3, and the residues after the aluminum being extracted are made into stuff or used for producing concrete. The invention breakthroughs the original idea of directly extracting Al2O3 from the coal ash, and adopts the wholly novel technical route of extracting silicon first and aluminum secondly, thereby enhancing the aluminum silicon ratio of the alkali leached residues, simplifying the technique of extracting Al2O3, and increasing the extracting rate of aluminum from the coal ash.

A liquid low concentration sodium-containing silicate solution as electrolyte for lead-acid storage batteries and its applications, is prepared by mixing a silica gel containing 40˜60 wt % SiO₂, the weight units of such a silica gel are 5˜15; add 15-25 weight units water and stir until the concentration of the mixture is 0.65˜0.85 ⁰Be′ measured by a Baum densimeter, adjusting the pH value of this mixture to 1-4 using inorganic acid and magnetizing the mixture under 1000-6000 Gauss magnetic field for 5-10 minutes, stir the magnetized mixture until the viscosity of the mixture is less than 0.02 poise and finally obtain a liquid low concentration sodium-containing silicate solution. The electrolyte can be used as electrolyte or activation solution for common or special lead-acid storage batteries.

The invention discloses a method for preparing nanoscale silica hollow microspheres, which uses sodium silicate solution and modified polymer respectively as the silicon source and template. Nanoscale silica hollow microspheres are prepared by a sacrificial template method by the following steps: (1) preparing polymer colloidal template microspheres; (2) preparing silicon dioxide-colloidal template complex microspheres; and (3) roasting the complex microspheres to obtain nanoscale silica hollow microspheres. Nanoscale silica hollow microspheres prepared by the invention have the characteristics of uniform size and appearance, fine integrity and high rate of productivity. The method can realize low cost and easy operation by using sodium silicate solution as the silicon source. Therefore, with easy operation and low cost, the method has certain instructing value for the industrialized production of silica hollow microspheres in the future.

The process of preparing white carbon black and pure zeolite molecular sieve with fly ash material belongs to the field of inorganic non-metal material preparing technology. The preparation process includes the following steps: roasting the mixture of high silicon fly ash with SiO2 content of 30-65 % and sodium carbonate in the weight ratio of 1 to 1-1.5 at 830 deg.c for 1 hr to obtain roasted product with sodium silicate and sodium aluminosilicate as main components; soaking the roasted product in water in 5 times to leach out sodium silicate with high water solubility, filtering to obtain sodium silicate solution, introducing CO2 to the solution and depositing to obtain white carbon black product; and further leaching desilicated fly ash with alkali solution, heating and stirring to obtain solution of sodium aluminosilicate, which is soluble in strong alkali solution, filtering, regulating pH value and crystallizing to obtain pure zeolite molecular sieve.

The invention relates to a method for preparation of titanic anhydride which is easy to disperse and is of high weatherability. The method consists of selecting 0.1 %-0.5 % hexametaphosphate, 0.1 %-0.3 % isopropanolamine or triethanolamine as disperser, dispersing the titanic anhydride paste and adjusting the PH value of the sodium-hydroxide solution to 10-11, adding silicate of soda solution and dilute sulphuric acid to cover silica dioxide at 91-95 DEG C, in which the added quantity of the soda solution is 1 %-6 % of the silica dioxide, then adjusting the PH value to 6.5-8.5, adding aluminum sulfate solution and sodium-hydroxide solution, in which the added quantity of the aluminum sulfate is 2 %-3.5 % of the aluminum oxide,maturing for 10 min to cover the aluminum oxide, rinshing and drying, then adding some organosilicon additive, performing comminution by gas stream to obtain the said titanic anhydride which is easy to disperse and is of high weatherability. The advantages of this invention lie in that it can effectively guarantee the dispersion of the paste before mat-forming treatment, can carry out the coating of the inorganic mat-forming treatment in single grain surface of titanic anhydride, and can reach the attempt of improving the weatherability and the dispersibility of titanic anhydride.

The invention discloses a process for preparing aluminum oxide and white carbon black by taking high-alumina fly ash as a raw material and adopting a two-step alkaline leaching method, comprising the following process steps of: preparing a sodium silicate solution by carrying out first-step alkaline leaching on the high-alumina fly ash; preparing the white carbon black by carrying out carbonation decomposition on the sodium silicate solution; preparing aluminum rich alkaline liquor by carrying out second-step alkaline leaching on desiliconization fly ash; preparing a sodium aluminate solution through the aluminum rich alkaline liquor; and preparing the aluminum oxide through the sodium aluminate solution, and the like. The invention prevents the high-temperature sintering in the process of the aluminum oxide prepared through the high-alumina fly ash, has low energy consumption and cyclic utilization of the alkaline liquor obtained through the first-step alkaline leaching and the second-step alkaline leaching, little material consumption; and in addition, silicon-calcium slag generated in the process course are used as raw materials for producing wall materials without generating secondary pollution, therefore the invention meets the requirements for clean production.

The invention supplies a manufacture method for high weathering resistance titanium dioxide pigment that includes the following steps: making slurry; adjusting the pH value of the slurry; adding dispersing agent and filtering; heating; adding sodium silicate solution; adding mixture of sodium silicate and sulphuric acid solution; adding sulphuric acid; adding sodium aluminate solution and sulphuric acid solution; adjusting the pH value; filtering, washing, drying, taking gas smashing and organic process. The invention has strong covering power, good dispersibility and high weathering resistance.

The invention relates to a method for preparing a P type molecular sieve by using coal ash as a raw material. The method for preparing the P type molecular sieve by using coal ash as the raw material comprises the following steps: I, pre-treating and activating coal ash; II, preparing sodium silicate and sodium metaaluminate by using activated coal ash; and III, synthesizing the P type molecular sieve: firstly, uniformly mixing a sodium silicate solution with a sodium salt, then, dropwise adding the sodium metaaluminate solution into the mixed liquid, and finally, adding an organic steric hindering agent and a proper amount of deionized water to form a reaction mixture, wherein the molar ratios of the reaction mixture are as follows: SiO2/Al2O3=0.4-1.8, M/Al2O3=1-5, Na2O/Al2O3=2-4 and H2O/SiO2=20-150 and the organic spatial steric hindering agent is at least one of ethanol amine, diethanol amine and triethanol amine; packing the mixed materials in a polytetrafluoroethylene container, stirring, then putting in a stainless steel reaction kettle, and carrying out hydro-thermal synthesis for 2-8 hours; and taking out products in the reaction kettle, carrying out centrifugal separation and washing by deionized water, and drying to obtain the P type molecular sieve. The method provided by the invention is short in synthetic cost, short in crystallization time and high in yield of the P type molecular sieve.

The invention relates to an absorbent for treating and reclaiming waste liquid oil, in particular for treating and reclaiming waste transformer oil and a production method thereof. The absorbent is characterized in that the absorbent is prepared from the following raw materials according to the weight ratio: sulphuric acid solution, aluminium sulphate solution, sodium silicate solution and ammonia water are mixed, aged, roasted and dried, cleaned and re-roasted; and the finished product of the absorbent is obtained. The absorbent for treating the waste oil has the characteristics of innocuity, noninflammability, nonexplosiveness and so on, and higher capability of adsorbing substances in the waste oil such as acid, carbon microsphere, metal, water content, gel, and the like. The absorbent is sufficiently contacted with the waste oil so as to remove harmful substances in the oil. The absorbent not only has a simple production process, wide raw material sources, low production cost and no environmental pollution, but also has good effect of waste oil treatment, and high yield. The absorbent can save mass production cost for enterprises and energy for the country.

The invention relates to titanium dioxide with high water dispersibility and a coating process, belonging to the chemical industry field, which solves the technical problem that titanium dioxide which is produced by a current process has lower dispersibility. The coating process of titanium dioxide with high water dispersibility of the invention comprises the steps of beating, silicon coating, aluminum coating, scouring, drying and disintegrating and the like, wherein sodium aluminate solution is used to conduct coating in the aluminum coating step, and sodium silicate solution is used to conduct coating in the silicon coating step, wherein the molar ratio of sodium aluminate solution usage which is calculated with A1 2 O3 and sodium silicate usage which is calculated with SiO 2 is 1:4. The process of the invention can be used to prepare titanium dioxide with high water dispersibility, which has widespread application prospect, and the Haegeman index of titanium dioxide which is prepared can reach over 7.0 in emulsion paint.

The invention relates to a combined producing method of active carbon, silica hydrated and soda with the waste of biomass power plant, which comprises the following steps: firstly, immersing and leaching the ash of rice husk of the power plant with lye to generate sodium silicate solution or sol and insoluble substance; secondly, separating the sodium silicate solution or sol from the insoluble substance, and carbonizing and neutralizing the sodium silicate solution or sol with the carbon dioxide recovered from the flue gas of the power plant to generate sedimentation of silicon dioxide and sodium carbonate solution; finally, preparing active carbon, silica and soda with the insoluble substance, the sedimentation of silicon dioxide and the sodium carbonate solution. The invention has the advantages that the ash of rice husk can be fully utilized, the carbon dioxide in the flue gas can be reasonably utilized, thereby the power plant has a great progress toward the target of zero draining, and the production cost and the energy consumption are reduced greatly, and the profit is increased obviously, and the invention has the great social and economic benefit.

The invention relates to a curing agent of concrete, comprising styrene-acrylic emulsion, acrylamide solution, sodium silicate solution and organosilane solution; the styrene-acrylic emulsion is poured into the acrylamide solution; the sodium silicate solution and the organosilane solution are added and uniformly stirred with low speed to form the curing agent of the concrete; water soluble material with good film forming ability is used without solvent; neither volatile substances are generated nor secondary environmental pollution are caused; the invention comprises organosilane, rapidly penetrates into capillary pores wall inside the concrete, and then chemically reacts with part of the water and air in the concrete to generate silicon dioxide; the capillary pore channels are blocked, and a solid waterproof layer is formed to prevent evaporation of internal moisture and avoid invasion of external harmful substance, which helps to improve the durability of the concrete, keeps the concrete in a maintenance state for a long period, and improves durability of the concrete.

The invention relates to a biological ceramisite filter material made of vulcanized lead zinc ore flotation tailings. The material is characterized by being prepared from 80-90wt% of vulcanized lead zinc ore flotation tailings, 8-18wt% of clay, 1.5-2.5wt% of pore former and an additional bonder, wherein the pore former is sawdust, bamboo scraps or straws, the bonder is lignin calcium xanthate, sodium carbonate or sodium silicate liquid, and the solid-to-liquid ratio of materials used by the biological ceramisite filter material is (8-12):1. The preparation method comprises the following steps of: weighing based on proportion of main and auxiliary materials; drying; mixing; forming; drying; preheating; roasting; and cooling to prepare a biological ceramisite filter material product made of the vulcanized lead zinc ore flotation tailings. The preparation method is simple and convenient to implement, free from secondary pollution, practical and reliable. The biological ceramisite filter material made of the vulcanized lead zinc ore flotation tailings provided by the invention has the advantages of turning ore waste residue into wealth and greatly lowering the cost of materials, so that the biological ceramisite filter material is a high-quality water treatment agent.

The invention relates to a method for preparing magnesia, silicon dioxide and nickel oxide products from lateritic nickel ores. The method comprises the following steps: (1), crushing, grinding and roasting the lateritic nickel ores with ammonium sulfate; (2), dissolving and filtering roasted products; (3), evaporating, condensing and crystallizing filtrate to prepare magnesium sulfate; (4), dehydrating and calcining the magnesium sulfate to prepare magnesia; (5), reacting filter residue with an alkaline solution or molten caustic soda, leaching and filtering the product of reaction to obtain a sodium silicate solution; (6), carbonizing, decomposing, filtering, washing and drying the sodium silicate solution to prepare the silicon dioxide; (7), leaching and filtering the residual filter residue by an ammonium carbonate solution; and (8), distilling ammonia from the filtrate and calcining the filtrate to prepare the nickel oxide. The residual residue is ferric oxide containing a small amount of impurities and can be used as an iron-making raw material or deep processed into a product with a high added value. The method is suitable for processing various lateritic nickel ores, has simple technological process and simple and convenient equipment, does not emit solid, liquid and gas waste or cause secondary pollution and uses lower cost to realize the high added value comprehensive utilization of lateritic nickel ore resources.

The invention belongs to the technical field of silicon dioxide, in particular to a preparation method of silicon dioxide of toothpaste with low viscosity and high oil absorption value. The preparation method comprises S1, a sodium silicate solution is allocated; S2, water and the sodium silicate solution are added into a reaction kettle and heated to the temperature of 75-80 DEG C, sulphuric acidis added dropwise while stirring is conducted until the pH value is 9-10, and the addition of the sulphuric acid is ceased; S3, the temperature is increased, the sodium silicate solution and the sulphuric acid are added dropwise simultaneously while stirring is conducted, the pH value during the process is maintained at 9-10, the sulphuric acid is continuously added until the pH value is 3.5-4.0after the dropwise adding of the sodium silicate solution is completed, sulphuric acid addition is ceased, and ageing, pressing filtering and washing are conducted to obtain initial products; S4, theinitial products are placed into a pulp beating tank, glycerol is added, beating is conducted after soaking, and pulverizing is conducted by using an airflow pulverizer after spraying drying is conducted to obtain the silicon dioxide of the toothpaste with low viscosity and high oil absorption value. The method is simple, the process is stable, the production cost is low, prepared silicon dioxidepowder is low in viscosity and high in oil absorption value, and the problem of the post growth of toothpaste viscosity can be better solved after the silicon dioxide is applied to the toothpaste.

The invention discloses a method for preparing preparing silicon dioxide aerogel powder, which comprises the following steps: adding acid into sodium silicate solution to make a pH value equal to 3 to 6; adding a chemical drying control agent into mixture and standing to form gel; after the gel is sufficiently aged, adding an azeotropic distillation organic solvent into the gel to distill to form a primary dried product; and drying the primary dried product to form silicon dioxide aerogel powder. The method uses the common commercial sodium silicate as the raw material to prepare the silicon dioxide aerogel powder and has the advantages that the raw material is easily obtained; the normal pressure is used for preparation; the chemical drying control agent is adopted to prolong the gelation time to promote uniformity of the gel structure; an azeotropic distillation drying process is adopted to control a stress level when the solvent is dried; a pore volume and a specific surface area of the silicon dioxide aerogel are controlled; the pore volume reaches 1.2 to 3.0ml/g; the specific surface area reaches 300m2/g to 800m2/g; and compared with the normal pressure drying, the drying time is shortened and the like. The organic solvent is easy to realize recycling. And the production process is simple and the production cost is low.

The invention relates to a method for preparing soluble glass by using waste residues with aluminum extracted by coal gangue. The method comprises firstly mixing and grinding the waste residue with aluminum extracted by coal gangue and sodium carbonate to be 1-50mu m particles, then conducting temperature programming in a muffle furnace, conducting low temperature congruent melting reaction for 1-5 hours at the temperature of 500-850 DEG C, and conducting water quenching to obtain coarse sodium silicate solid; and placing the coarse sodium silicate solid in a high pressure reactor, adding distilled water, heating to be 150 DEG C, stirring and dissolving for 5 hours, cooling to be room temperature, filtering and separating to obtain a colorless and transparent sodium silicate solution, and crystallizing to be the soluble glass. The method lowers the temperature for preparing sodium silicate by using a traditional soda ash method by about 600 DEG C, greatly reduces energy consumption, and simultaneously avoids highly corrosive of a traditional caustic soda alkali-dissolution method on production facilities and alkali pollution on the environment.

A blocking and regulating agent for organic delay silicic gel is prepared by adding at least one of ethyl acetate, acetamide and alcohol as delay activator into master material of sodium silicate solution. The said acetamide can be replaced by formamide or carbomite and alcohol can be replaced by methanol or sometime ammonium chloride can be added.