1000 results about "Kaolinite" patented technology

Oxidative sorbents are provided for adsorbing elemental or oxidized mercury from mercury-containing fluids such as flue gas from a coal-burning power utility or the like at a temperature range of about 50 to 350 ° C. The method of preparing and using the oxidative sorbents is also provided. The oxidative sorbent compositions include one or more silicates capable of cation exchange with a plurality of active metal cations and their counter anions. The silicates may include those selected from clays such as montmorillonite, laumonite, bentonite, Mica, vermiculite and kaolinite, and from silica gels, natural and synthetic molecular sieves, zeolites, and ashes from stoker- and pulverized coal-fired boilers. The one or more oxidative metal halides and/or sulfates may be selected from the group consisting of CuCl, CuBr, CuCl₂, CuBr₂, CuSO₄, FeCl₂, FeCl₃, FeSO₄, Fe₂(SO₄)₃, ZnCl₂, ZnBr₂, NiCl₂, and NiSO₄. The oxidative sorbents may also include activated carbon.

The invention discloses cat litter comprising a composition prepared from the following components in percent by weight: 50-80% of inorganic clay, 5-15% of silica gel, 5-20% of organic substrate and 8-20% of mineral matter, wherein the inorganic clay is selected from one or a mixture of attapulgite, bentonite, kaolinite and sepiolite; the organic substrate is selected from one or a mixture of corncob, corn, wheat, clover, peanut hull, walnut shell, pine wood shavings and broadleaved tree wood shavings; and the mineral matter is selected from one or a mixture of perlite, diatomite, pumice and other low-density mineral matters. The cat litter disclosed by the invention has the following advantages of largely strengthened adsorption deodorization capacity due to the addition of the silica gel component, stronger deodorization capacity by utilizing the adsorbability of natural materials, natural fragrance, small weight and strong caking capability, in particular no dust and easiness for treatment; and the cat litter disclosed by the invention is 40% lighter than the traditional bentonite cat litter.

The invention relates to the field that biquaternary ammonium compounds are applied in silicate mineral flotation, and discloses a collector which applies the biquaternary ammonium compound with the constitutional formula shown as the formula I in bauxite or ironstone reverse flotation desiliconization. In the formula I, R<1> and R<2> are alkyls with 6-18 carbon atoms; R<3>, R<4>, R<5> and R<6> are respectively methyl, ethyl, -(CH2CH2O)nH, or -(CH(CH3)CH2O)nH, wherein, n is equal to 1-6; R<7> is alkylene with 2-6 carbon atoms; and X is Cl, Br or I. The collector of the invention has strong ability to collect quartz, kaolinite, illite and pyrophyllite, and is applicable to the silicate mineral separation from the bauxite or ironstone by reverse flotation, the suitable pH range of the flotation pulp is 5-13, and the dosage is equal to 50-500 g/t according to the content change of the silicate mineral in ores.

The invention relates to an expendable pattern casting (EPC) molding shell paint for casting steel, and the EPC molding shell paint comprises surface a layer fireproof paint and a back layer reinforcing paint, wherein the surface layer fireproof paint comprises the following components in parts by weight: 80-90 parts of high-chromium alundum powder, 10-20 parts of calcined kaolinite, 6-8 parts ofcalcium rectorite powder, 1-3 parts of sodium tripolyphosphate, 3-5 parts of polyvinyl formal solution, 0.3-0.5 part of ethoxylated alkyl sodium sulfate, 0.6-1.0 part of polyether type modified polydimethylsiloxane and 60-75 parts of water; and the back layer reinforcing paint comprises the following components in parts by weight: 75-85 parts of coal gangue sand, 15-25 parts of kaolinite, 3-6 parts of feldspar powder, 8-13 parts of calcium rectorite powder, 8-10 parts of sodium tripolyphosphate, 1.5-2.0 parts of wood fiber and 30-45 parts of water. A molding shell manufactured by the surface layer fireproof paint and the back layer reinforcing paint has the characteristics of high strength and refractoriness, good air permeability and the like.

A process for preparing the calcined kaolinite includes such steps as dressing ore, crushing, pulverizing by 325 meshes, mixing with water and disperser, pulverizing by 4500-6000 meshes, drying, pulverizing, calcining at 970-990 deg.C for 30-40 min while adding whitening agent, and breaking. Its features high whiteness and fineness.

The invention discloses a method for preparing polyester for a low-haze biaxially oriented polyester film. The method takes dibasic acid and dihydric alcohol as the main materials to prepare low-haze biaxially oriented polyester film through direct esterification method by means of esterification and polycondensation. Agglomeration resistant agent and catalyzer are added during the esterification process and stabilizer is added during the polycondensation process; agglomeration resistant agent is steatite, calcium carbonate, barium sulfate or kaolinite. When taking the polyester prepared through the method of the invention to make films, no other agglomeration resistant agents are needed, the haze is more than 30%lower than normal like products and the agglomeration resistance is comparable with normal like products.

The invention provides a concrete paving brick capable of clarifying air produced by using building waste and recycled glass and the manufacturing method thereof. The paving brick comprises an absorption layer and a foundation layer, the absorption layer comprises cement, aggregate, titanium oxide and coal ash or kaolinite powder, the aggregate of the absorption layer comprises recycled aggregate, waste glass aggregate and sand or stones; the foundation layer comprises cement, aggregate and coal ash or kaolinite powder, the aggregate of the foundation layer comprises recycled aggregate, waste glass aggregate and sand or stones. The paving brick of the invention has good function of absorbing exhaust gas and good strength.

A method for smoothing skin comprising applying a composition that has from about 0.5 to about 4% sodium silicate as measured by silica content (SiO₂) and from about 0.1% to about 4.0% of a polyvalent silicate. The composition is provided in a carrier, for example, from about 10 to 98% water, and can be in the form of a water gel or oil-in-water emulsion. A second composition is applied before or after the first composition wherein the second composition is selected from the group consisting of an oil-in-water emulsion, water-in-oil emulsion, thickened water gel, thickened oil phase, encapsulated oil phase, solid oil phase, and mixtures thereof. The polyvalent silicate can be a silicate clay selected from the group consisting of bentonite, laponite, smectite, and kaolinite.

An adsorbent for adsorbing p-xylene from mixed C8 arylhydrocarbon is composed of the adsorptive active component chosen from Ba or Ba and K exchange X zeolite to Y zeolite (88-95 mass%) and the kaolinite. Its advantages are high adsorption capacity and high adsorption selectivity.

A catalyst for catalytic cracking process is prepared from kaolinite, solid crystal seed, assistant, organic disperser and/or adhesive through spray drying, shaping microspheres, high-temp calcining,crystallizing reaction on sodium silicate and sodium hydroxide to obtain crystallized microspheres (content of NaY zeolite is 20-70%, ratio of zeolite silica-alumina is 4.0-6.0), calcining, and exchanging with NH4 and Re3 three times. Its advantages are high resistance to heavy metal, high activity and stability, and low cost.

A high-activity catalyst for catalytic cracking process is prepared from kaolinite, solid seed, assistant, organic disperser and adhesive through spray drying, shaping, microspheres, high-temp calcining, crystallizing reaction on sodium silicate and sodium hydroxide to obtain crystallized microspheres content of zeolit is 20-70%, ratio of zeolit silica-alumina is 4.0-6.0), calcining, and exchanging with NH4 and Re3 three times. Its advantages are high resistance to heavy metal, high activity and stability, and low cost.

A high-performance 5A molecular sieve with pressure-variable adsorption function is prepared through proportionally mixing the raw powder of 4A molecular sieve with kaolinite-type clay, adding plant fibres, granulating, sieving, baking, calcining at 200-1000 deg.C, immersing in the solution of sodium hydroxide, washing, Ca ion exchanging in CaCl2 solution, washing, baking, and calcining at 100-800 deg.C. Its advantages are high adsorption capacity, diffusing speed, and mechanical strength.

A process for preparing flaky aluminum oxide from coal kaolinite or powdered coal ash includes such steps as pulverizing, magnetic separation, high-temp calcining, extracting in acid to obtain Al salt, purifying, refining, crystallizing, shaping and pyrolyzing.

The invention provides a production method for a colorful, color-stable imitated metallic luster glaze which can meet the requirements of low-temperature rapid firing process. The method includes: (1) first making the following raw materials into a frit by weight percentage of 10-20 per cent quartz, 40-60 per cent lepidolite, 10-20 per cent boric acid, 2-6 per cent barium carbonate, 3-10 per cent limestone, 3-12 per cent metal oxide and then evenly mixing the raw materials after melting at 1200-1350 DEG C and obtaining a color frit by water quenching. (2) making the glaze with the following materials by weight of 75-90 per cent color frit, 0-20 per cent high boron frit and 5-10 per cent kaolinite. The metallic luster glaze products is colorful and low in sintering temperature and is suitable for the characteristics and style of interior wall glazed tiles of twice low-temperature rapid firing and the frit is produced by sintering metal oxides, therefore the color is very stable.

The invention relates to a preparation method of a porous silicon/graphite/carbon composite negative electrode material for a lithium-ion secondary battery. A silicon source of the composite materialis natural mineral soil: namely kaolinite, montmorillonite, mica powder, wollastonite, vermiculite powder, pumice powder and coal gangue. The silicon source is reduced into elemental silicon by usinga metal element or alloy powder and anhydrous metal chloride under a mild condition, and the reduced porous silicon, graphite and an organic carbon source are subjected to high-energy ball mill mixing. The reduction temperature is low, the inherent pore structure of the natural mineral soil is effectively reserved and the prepared silicon material has relatively high specific surface area and abundant pores and has excellent electrochemical properties. Volume expansion can be effectively relieved through the inherent pore characteristic of the natural mineral soil; and the prepared composite material has higher charge-discharge capacity and stability. Especially the kaolinite is wide in source and low in price, so that the preparation cost of the battery material is greatly reduced. The porous silicon/graphite/carbon composite negative electrode material is friendly to environment, simple in preparation method, instrument and equipment and suitable for industrial production.

A nano-class kaolinite powder with 0.3-0.9 g/cu.m of bulk density and 400-800 nm of average diameter is prepared from the natural fine-particle kaolinite through removing impurities (Fe, Ti, etc) by magnetic separation and chemical reduction, and unique surface treating to prevent aggregation. It can be used for rubber, plastics, paper, ink and ceramics.

The invention provides a phyllosilicate mineral depressor for sulfide ore floatation and a preparation method thereof. The phyllosilicate mineral depressor for the sulfide ore floatation is prepared from the following components in part by weight: 0 to 20 parts of modified corn starch, 8 to 30 parts of sodium alginate, 1 to 35 parts of carboxymethyl cellulose or polyanionic cellulose or methylenenapadisilate dinaphthalene sulfonate, and 5 to 55 parts of sodium hexametaphosphate. The preparation method comprises the following steps of: selecting the reagents according to types of depressed minerals; adding the reagents in a high-speed mixing granulator in the set ratio for granulation; and drying the obtained grains to obtain the phyllosilicate mineral depressor for the sulfide ore floatation. The product has the characteristics of small dosage, good depression selectivity, low toxicity, and the like. The specific depressor is mainly applied to depressing phyllosilicate minerals such as talcs, serpentines, chlorites, kaolinites and the like during the sulfide ore floatation, thus the specific depressor is favorable for improving floatation concentrate grade and metal recovery rate, and is particularly suitable for floating talc-containing molybdenites and nickel sulfide ores.

A process for recovery of silica and alumina from fly ash, in which, Si is leached out from the fly ash in the form of Na₂SiO₃ using a NaOH solution of NaOH >40% (w/w), followed by separation to obtain a Na₂SiO₃ solution and a residue having Al—Si ratio ≧2; vaporizing the solution to obtain Na₂SiO₃ solutions of various concentrations, or producing silica by carbonation, and producing Al₂O₃ by prior art methods from residues obtained after alkali-leaching, ultimately producing filler or cement from the residue after the recovery of Al. The method permits recovery of Al₂O₃ directly from fly ash by removing Si before recovering the Al, which raises the Al—Si ratio of the residue after alkali-leaching and thus simplifies the recovery of Al₂O₃ and raises the rate of Al recovery from fly ash. The invention further includes calcining high Al coal gangue, kaolinite and middle-low-class bauxite at 900-1100° C.

A soybean polypeptide powder without bitter taste is prepared through mixing soybean protein with distilled water, grinding, regulating pH value and temp. adding neutral proteinase, enzymolyzing, deactivating enzyme, regulating pH value and temp. adding pancreatin, enzymolyzing, deactivating enzyme, filter, adding kaolinite powder, adsorption, adding activated carbon powder, adsorption, and vacuum drying. Its advantages are no bitter taste and high quality.

A catalyst for lightening heavy arylhydrocarbon and transferring alkyl with high transform rate and low cost is prepared from the beta-zeolite and mordenite symbiotic molecular sieve (10-80 Wt%) and at least one inorganic adhesive chosen from gamma- Al2O3, alpha-AlO(OH), SiO3, silicon aluminum oxide, bentone, kaolinite, diatomite and montmorillonite through ammonium salt exchange to said symbiotic molecular sieve, calcining to become hydrogen-type symbiotic molecular sieve, mixing it with said adhesive, shaping, drying, and calcining.