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335results about How to "Raw materials are cheap and easy to get" patented technology

Method for preparing gypsum-based self-leveling material by using desulfurization gypsum

The invention discloses a method for preparing gypsum-based self-leveling material for use in building material industry. The main material of the gypsum-based self-leveling material is desulfurized gypsum which is a desulfurization product from power plants. The method comprises: firstly, calcining the desulfurized gypsum in a calcining kiln; and secondly, mixing calcined gypsum powder accountingfor 50 to 78 percent of the total weight of the material, a water reducer accounting for 0.1 to 1 percent of the total weight of the material, a retarder accounting for 0.01 to 0.5 percent of the total weight of the material, a water-retaining agent accounting for 0.02 to 5 percent of the total weight of the material, a reinforcing agent accounting for 0 to 10 percent of the total weight of the material, re-dispersible emulsion powder accounting for 0.2 to 1.5 percent of the total weight of the material, a defoamer accounting for 0.05 to 0.2 percent of the total weight of the material, riversand accounting for 25 to 45 percent of total weight of the material and a filler accounting for 0 to 20 percent of the total weight of the material to obtain a the high-performance gypsum-based product. The invention provides a new method for producing high-quality gypsum-based self-leveling material characterized by high strength, high flowability, small contraction deformation and low cost by using the desulfurized gypsum, which provides a new way of comprehensively using desulfurized gypsum that is a solid waste and fills the blank that the preparation of gypsum-based self-leveling materials from desulfurized gypsum lacks in China.
Owner:江苏仁和建材科技有限公司

Preparation method and application of nanosheet self-assembled microflower-shaped VS2

The invention provides a preparation method and application of nanosheet self-assembled microflower-shaped VS2. The preparation method comprises the steps that firstly, the pH of a vanadium source solution and the pH of a sulfur source solution are regulated to be 11-14 under the magnetic stirring state through a sodium hydroxide solution; secondly, the solutions are poured into a reaction inner lining, the inner lining is contained in an outer kettle and fixed, and then the outer kettle is placed in a homogeneous reaction instrument; finally, a product obtained after a reaction is cooled, washed, collected and dried, and then the nanosheet self-assembled microflower-shaped VS2 can be obtained. The technology of the method is simple and easy to control, and the prepared nanosheet self-assembled microflower-shaped VS2 is uniform in chemical constitution and high in purity, has a specific self-assembled structure and shows the excellent electrochemical property when the nanosheet self-assembled microflower-shaped VS2 serves as a lithium-sodium ion battery electrode material. In addition, the method has the advantages that the defect that a traditional calcination method is high in temperature is overcome, large equipment and harsh reaction conditions are not needed, the raw materials are cheap and easy to obtain, the cost is low, the yield is high, aftertreatment is not needed, and the method is friendly to the environment and can be suitable for large-scale production.
Owner:SHAANXI UNIV OF SCI & TECH

Preparation method and application method of visible-light response type bismuth oxychloride photocatalyst

The invention discloses a preparation method and an application method of a visible-light response type bismuth oxychloride photocatalyst, and belongs to the technical field of photocatalyst water treatment in the environmental chemical industry. The preparation method is characterized by comprising the following steps of: adding sodium bismuthate into absolute ethyl alcohol, and dispersing for 1 to 1.5h by magnetic stirring; preparing 100ml of 1.2mol.L<-1> hydrochloric acid, weighing potassium iodide of which the molar weight is equal to that of chloride ions in a prepared hydrochloric acid solution, and dissolving the potassium iodide into the hydrochloric acid solution to form a hydrochloric acid-potassium iodide mixed solution; dropwise adding the prepared hydrochloric acid-potassium iodide mixed solution into a sodium bismuthate-absolute ethyl alcohol dispersing system at the speed of adding 1mL of the mixed solution within 8 to 10 minutes by the magnetic stirring; stirring for 1.5 to 2h at the reaction temperature of 20 to 20.5 DEG C to prepare a suspended solution; filtering the suspended solution to obtain a filter cake; washing the filter cake for three times by using distilled water and the absolute ethyl alcohol; and drying the filter cake at the temperature of 40 to 50 DEG C to obtain the visible-light response type bismuth oxychloride photocatalyst. The visible-light response type bismuth oxychloride photocatalyst is used for adsorption and photocatalytic degradation of Rhodamine B or methylene blue dye wastewater, has good adsorption and photocatalytic degradation functions under visible light, is stable in catalytic activity and high in recycle rate, and has a practical application prospect.
Owner:TAIYUAN UNIV OF TECH

Preparation method and application of carbon nitride supported chromium monoatom Fenton catalyst

The invention discloses a preparation method and application of a carbon nitride supported chromium monoatom Fenton catalyst, and belongs to the technical field of Fenton catalysts. The technical solution key point is that the carbon nitride supported chromium monoatom Fenton catalyst comprises a heterogeneous solid carbon nitride carrier and an active component metal chromium monoatom supported on the carbon nitride carrier, the catalyst has a porous sheet-like structure, and the chromium monoatoms are uniformly anchored on SA-Cr/g-C3N4. The invention also specifically discloses the preparation method of the carbon nitride supported chromium monoatom Fenton catalyst and the application of the catalyst in catalytic degradation of dye wastewater. According to the method provided by the invention, raw materials required in the preparation process of the catalyst are cheap and easy to obtain, and the catalyst has a high yield, and is suitable for large-scale industrial production; and when the catalyst is used for catalytic degradation of the dye wastewater, the selectivity is 100%, the reaction conditions are mild, the catalyst can be simply washed and recovered for recycling, and the catalyst still maintains better catalytic activity.
Owner:ZHEJIANG NORMAL UNIVERSITY

Method for recovering rare earth in ion adsorption type rare earth ore leaching solution through fractional precipitation

The invention discloses a method for recovering rare earth in an ion adsorption type rare earth ore leaching solution through fractional precipitation. According to the method, firstly, a magnesium-containing alkaline compound is added to a purified ion adsorption type rare earth ore leaching solution for a precipitation reaction; and then a calcium-containing alkaline compound is further added for a precipitation reaction, and rare earth precipitation concentrates and precipitation mother liquor are obtained after solid-liquid separation. According to the method, raw materials adopted are cheap and easy to obtain, and the process is simple and easy to control, so that the production cost is lowered; the problem of ammonia and nitrogen pollution in the precipitation process of the ion adsorption type rare earth ore leaching solution is solved; meanwhile, the adding amount of the magnesium-containing/calcium-containing alkaline compound is controlled, so that a precipitant is dissolved fully as much as possible, and the purity of the rare earth precipitation concentrates is improved; in addition, sulfate ions and calcium ions in the leaching solution can form a small amount of calcium sulfate precipitate with the good crystallization property; crystals of rare earth hydrate can be induced, and the problem that the rare earth hydrate is not liable to form a crystal form precipitate can be also solved.
Owner:JIANGXI UNIV OF SCI & TECH

Method for preparing potassium carbonate

InactiveCN101186317ALess investmentRaw materials are cheap and easy to getCalcium/strontium/barium chloridesCarbonate preparationChemistryAmmonium hydroxide
The invention belongs to a preparation method of potassium carbonate, which relates to potassium carbonate. The invention provides the preparation method of the potassium carbonate with less process equipment, low energy consumption and no pollution discharge. The preparation method of the potassium carbonate is that: coal-fired flue gas or limekiln gas, after being washed by water, dust removed and desulfurized, is pumped in ammonia and made into (NH4)2CO3 liquid, and then Ni(OH)2 and KCl are added, NH3 is pumped in, and then Ni(NH3)6Cl2 is separated; after precipitation, K2CO3 ammonia solution is obtained and removed to a vessel, then the obtained solution is pressurized and pumped in NH3 or added with liquid ammonia, the K2CO3 ammonia solution is layered, the upper layer is supersaturated ammonia solution and the lower layer saturated K2CO3 ammonia containing solution; extraction method is adopted to obtain K2CO3 ammonia containing saturated solution; the K2CO3 ammonia containing saturated solution is heated to evaporate and filtered to remove the residue NiCO3 after being deaminated, and then evaporated to dryness, thus K2CO3 product is obtained; the Ni(NH3)6Cl2 is dissolved in water, added with lime and then heated to evaporate and deaminated thoroughly and Ni(OH)2 is filtered from Ni(NH3)6Cl2 solution to be reused, thus the filtrate is condensed to obtain CaCl2 product.
Owner:ZHONGKE YIGONG SHANGHAI CHEM TECH CO LTD

Gemini imidazoline-ammonium-salt and preparation method and application thereof

The invention relates to gemini imidazoline-ammonium-salt. A preparation method comprises the following steps: amidating and cyclizing long-chain organic acid and organic polyamine to obtain an imidazoline matrix; then reacting epichlorohydrin and dialkyl amine to obtain an intermediate; finally reacting the imidazoline matrix and the intermediate to obtain the gemini imidazoline-ammonium-salt. The gemini imidazoline-ammonium-salt provided by the invention has the following advantages: (1) raw materials for an asphalt emulsifier are low in cost, the preparation technology is simple, no catalyst is used, and the production cost is low; (2) on the aspect of the design of a molecular structure, a biquaternary ammonium salt structure is introduced into molecules of the emulsifier to improve the water solubility and the emulsion performance of the emulsifier, at the same time, the quantity of cations is increased and the emulsion breaking speed of emulsified asphalt is obviously reduced; (3) the asphalt emulsifier is high in emulsifying capacity for different asphalts, and the prepared emulsified asphalt is even and fine and high in storage stability, can be both used for emulsifying asphalt in a slurry seal and used for emulsifying the asphalt on the micro surface.
Owner:CHINA UNIV OF PETROLEUM (EAST CHINA)
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