766 results about "Activated Aluminum Oxide" patented technology

The invention relates to a light-weight Al2O3-SiC-C refractory casting material and a preparation method thereof. The light-weight Al2O3-SiC-C refractory casting material comprises the following raw materials: 40-55 wt% of porous corundum particle, 8-12 wt% of corundum particle, 6-12 wt% of SiC particle, 6-10 wt% of SiC fine powder, 5-8 wt% of corundum fine powder, 8-12 wt% of active aluminum oxide micropowder, 3-5 wt% of calcium aluminate cement, 2-4 wt% of silicon oxide micropowder, 2-4 wt% of ball asphalt, 1.5-2.0 wt% of silicon powder, 0.1-0.3 wt% of aluminum powder and 0.1-0.3 wt% of boron carbide powder. The preparation method comprises the following steps: mixing the raw materials with 8-15 wt% of water, 0.2-0.6 wt% of water reducing agent and 0.02-0.04 wt% of organic explosion-proof fiber, stirring, casting, molding, and naturally drying at 110 DEG C for 12-48 hours to obtain the light-weight Al2O3-SiC-C refractory casting material. According to the invention, the process is simple; and the prepared product has the characteristics of high strength, excellent thermal shock stability, low heat conductivity and high medium erosion resistance, and also has the advantage that the apparent porosity and pore size can be controlled.

The invention provides a heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent. The heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent is prepared from the following components in percentage by weight: 30-50 percent of biomass charcoal, 5-10 percent of diatomite, 5-10 percent of sodium bentonite, 5-10 percent of activated aluminum oxide, 10-20 percent of dithiocar-bamate, 5-10 percent of ethylenediaminetetraacetic acid, 5-10 percent of tartaric acid, 5-10 percent of polyacrylamide and 5-10 percent of sodium dodecyl sulfate. A preparation method for the heavy metal cadmium, lead and arsenic compound contaminated soil restorative agent comprises the following steps: mixing the biomass charcoal, diatomite, sodium bentonite, activated aluminum oxide, ethylenediaminetetraacetic acid, tartaric acid, polyacrylamide and sodium dodecyl sulfate in mass proportion to obtain a mixture; and adding the dithiocar-bamate into the mixture in corresponding mass proportion to sufficiently mix uniformly, thereby obtaining the prepared soil restorative agent. The prepared soil restorative agent has good effect in restoring the cadmium, lead and arsenic compound contaminated soil.

The invention discloses calcium aluminate cement-combined corundum castable and a preparation method thereof. With calcium aluminate cement as a binding agent, tabular corundum and activated aluminum oxide as main components, and titanium dioxide/calcium carbonate/magnesium oxide micro-powder as a compound additive, the high-strength calcium aluminate cement-combined corundum castable is prepared. By combining with the characteristics of accelerating sintering by virtue of titanium dioxide and forming spinel and calcium carbonate to convert into high-activity calcium oxide at a high temperature by reaction of magnesium oxide and corundum, the strength of the corundum castable is greatly improved. The prepared high-strength calcium aluminate cement-combined corundum castable has excellent performance, and can be applicable to the industries such as building materials, metallurgy and petrifaction; and the service life of equipment such as a cement kiln opening, a coal-injection duct, an induction furnace lining and a high-temperature wear-resisting lining is effectively prolonged.

The invention relates in particular to a rotary kilneye castable for treating industrial minerals and a preparation method of the castable. The preparation method adopts the technical scheme that the preparation method comprises the steps that 40-60wt% of brown corundum particles or alumina particles, 20-40wt% of mullite particles, 6-20wt% of white corundum fine powder, 5-15wt% of silicon carbide fine powder, 1-5wt% of silicon oxide micro powder, 1-8wt% of activated alpha aluminium oxide micro powder and 2-8wt% of aluminate cement are taken as raw materials; 4-8wt% of water and 0.1-0.4 wt% of water reducing agent are added to the raw materials and mixed uniformly; casting and vibration molding is conducted; and a molded blank is naturally dried for 24h in air, and then dried for 24-48h at 110 DEG C. The rotary kilneye castable for treating the industrial minerals mainly comprises Al2O3 and SiC, has main crystalline phases of corundum, silicon carbide and mullite, has higher strength, and has the characteristics of good erosion resistance, thermal shock stability and wear resistance.

The invention discloses a process method for performing advanced treatment on petrochemical wastewater through catalytic ozonation. The method is characterized by comprising the following steps of: allowing petrochemical wastewater to sequentially flow through a pre-oxidation tower, a catalytic oxidation tower I and a catalytic oxidation tower II, and respectively filling high-porosity inert filler, activated aluminum oxide-based catalyst and granular active carbon in three towers, wherein the pre-oxidation tower operates under pressure. The ozone is prepared by an oxygen-enriched source or oxygen source ozone generator, and tail gas in the tower is collected and treated in a unified mode.

The invention discloses a method for activating and regenerating waste industrial activated aluminum oxide. The method comprises pretreatment, cleaning liquid impregnation treatment and regeneration treatment; adopted cleaning liquid is selected from at least one of acid liquor and alkali liquor and surfactant solution; the regeneration treatment comprises regenerated liquid impregnation and calcination treatment, and adopted regenerated liquid is selected from aluminum-contained solution; the calcination treatment is performed under air atmosphere, and air inlet amount is 300 to 800 m<3>/(h.t). According to the method for activating and regenerating the waste industrial activated aluminum oxide provided by the invention, an original pore structure channel is dredged through a physical and chemical method, and a new pore structure is regenerated on the basis of the existing pore structure to obtain activated aluminum oxide with high specific surface area and high pore volume.

The invention provides a preparation method for a load transition metal catalyst for ozone oxidation. The preparation method comprises the following steps: placing a catalyst carrier raw material in a NaOH aqueous solution, soaking, drying, preparing activated aluminum oxide sol, soaking catalyst particles in the activated aluminum oxide sol, drying and roasting, so as to obtain a coating, repeating the steps until a catalyst carrier coated for multiple times is obtained, enabling the content of the activated aluminum oxide coating to be 5-15% of the catalyst carrier in weight, soaking the catalyst carrier in an aqueous solution containing active constituents of transition metal, dying and roasting, so as to obtain the load transition metal catalyst. The load transition metal catalyst is high in ozone catalytic activity, the COD concentration of organic wastewater can be reduced to 50 mg/L below from 100 mg/L by the load transition metal catalyst, the load transition metal catalyst has a stable catalytic effect during the process of treating organic wastewater through catalytic ozonation, and the catalytic activity is not changed basically after the load transition metal catalyst continuously runs for multiple days in a fixed bed reactor.

The invention provides a special-purpose composite dephosphorizing coagulating agent for drinking water, which comprises the following constituents: potassium permanganate 20-30%, ferrous sulfate 5-10%, ferric chloride 20-30%, manganese sulfate 5-10%, polyacrylamide 1-2%, calcium carbonate 1-3%, polymeric aluminum chloride 10-20%, sodium hypochlorite 5-10%, sodium silicate 2-4%, activated aluminum oxide 5-10%, the ratio being weigh percent.

The invention discloses a molecular sieve filter element, which is prepared by the following raw materials in parts by weight: 10-30 parts of activated carbon powder, 15-60 parts of functional material, 15-55 parts of polyethylene and 2-12 parts of gas generation agent, wherein the functional material is selected from one of calcium sulfite, nano metal, medical stone, activated aluminum oxide and alkaline Tourmaline. The molecular sieve filter element provided by the invention takes activated carbon as base stock matched with the gas generation agent, then is prepared by adding the functional material selected from any one of the calcium sulfite, nano metal, medical stone, activated aluminum oxide and alkaline Tourmaline, and has the functions of residual chlorine removal heavy metal removal, water quality mineralization, and fluorine and arsenic removal to alkalinize the water, thus being capable of filtering water better. The invention also discloses a preparation method for the molecular sieve filter element.

The invention relates to a synchronous fluorine-calcium removal treatment process for the reverse osmosis concentrated liquor of waste water from lead-zinc smelting. The process comprises the following steps: firstly, removing fluorine by virtue of oxidation and precipitation, secondly, removing calcium by precipitating, thirdly, removing fluorine by virtue of adsorption, next, sequentially regenerating activated aluminum oxide, removing fluorine from the generated mixed liquor, removing calcium from the generated mixed liquor and treating the generated mixed liquor, and finally, removing fluorine by precipitating, wherein the precipitation sludge generated in the calcium removal process is gathered and dehydrated by virtue of filter pressing, the water obtained by filter pressing is returned to a reverse osmosis concentrated liquor collecting tank for circular treatment, and the mud cake is subjected to unified disposal. After the oxidization, precipitation and adsorption treatment processes are adopted, the fluorine content and the calcium content of the reverse osmosis concentrated liquor are lower than 3mg/L and 50mg/L, respectively, and the problems of scaling and blockage caused by fluorine ions and calcium ions in the subsequent evaporation and concentration process of the reverse osmosis concentrated liquor are solved.

The invention relates to a method for molding rare earth absorbent, which comprises the following steps: firstly, activating, soaking, drying and screening one of zeolite, diatomite and activated aluminum oxide sequentially to obtain rare earth absorbent powder; and then, molding the rare earth absorbent by the compression molding method. The molded absorbent is applicable in various treatments of wastewater, particularly the treatment of nitrogen and phosphorous pollution in wastewater; and the molded absorbent can be easily recovered, and the hydraulic resistance is low when in use, thereby preventing the absorbent from running off.

The invention discloses a catalyst for hydrolysis of carbonyl sulfide as well as a preparation method and an application thereof, and belongs to the field of natural gas purification. The catalyst comprises a carrier and an active component which is loaded on the carrier; the carrier is active aluminum oxide and/or active titanium oxide; the active component comprises at least one of oxide of alkali metal, oxide of alkaline earth metal, and oxide of rare earth metal; the weight of the active component accounts for 5-10% of the weight of the catalyst; particle sizes of active aluminum oxide and active titanium oxide are 4-6mm, pore volumes are 0.35-0.45ml/g, and specific surface areas are 300-350m<2>/g. The catalyst has the advantages of good gas source adaptability, high sulfation resisting capability, low applicable temperature, excellent hydrolysis capability for carbonyl sulfide whose concentration is 100-4000ppm, and removal rate of carbonyl sulfide reaches 97% or above.

The invention relates to an aluminum-magnesium light castable and a preparation method thereof. The technical scheme comprises the following steps: using 60 to 85 wt% of aluminum-magnesium porous ceramic particles as the skeletal material, and using 10 to 35 wt% of corundum fines, 0 to 0.3 wt% of silicon oxide micropowder, 1 to 6 wt% of magnesium oxide micropowder and 2 to 8 wt% of activated aluminum oxide micropowder as the host material; premixing 1 to 3 wt% of water reducer with the host material additionally based on the total weight of the skeletal material and the host material, adding the premixed host material into the skeletal material, and adding 8 to 20 wt% of water additionally based on the total weight of the skeletal material and the host material; and stirring uniformly, pouring, vibration-moulding, and drying the body after the moulding for 6 to 36 hours under the temperature of 110 to 150 DEG C. The product provided by the invention has the characteristics of low silicon content, is cement-free, and has high porosity, small average pore size, high fire resistance, large high temperature strength, low thermal conductivity, good thermal shock stability and strong medium erosion resistance such as the slag and the like. The castable provided by the invention can be used as the energy saving working lining material of the industrial furnace in pyrometallurgy and the like, which can contact with the medium such as the high temperature slag and the like in a long term.

The invention discloses a method for preparing propylene by methanol, which consists of the following procedures: a. methanol is used as raw material to generate reacting effluent I after passing through a first reactor at the temperature of 150-350 DEG C; in the first reactor, at least one solid acid catalyst chosen from activated aluminum oxide, heteropoly acid and molecular sieve is provided; b. the reacting effluent I is mixed with thinner water, with a mass ratio of 0.2-5:1 between methanol and water; at the temperature of 400-550 DEG C, the mixture passes through a second reactor provided with HZSM-5 molecular sieve catalyst; the mass of airspeed of methanol relative to the HZSM-5 molecular sieve catalyst is 0.2-10h<-1>; and effluent II containing propylene is generated. The method for preparing propylene by methanol has the advantages of high selectivity of propylene and good stability of catalyst by means of the advantages of high activity, little carbon deposit, and strong anti-carbon capacity of nanometer ZSM-5 molecular sieve.

The invention relates to a prefabricated concrete heat storage module for solar heat power generation. The prefabricated concrete heat storage module consists of two heat storage concrete blocks which have the same structure, wherein a heat exchange tube is arranged in each heat storage concrete block; the outer wall of each heat exchange tube is provided with a plurality of uniformly distributed heat exchange stainless steel fins; each heat storage concrete block is provided with a plurality of communicated concave connection grooves; and in assembling, the concave connection grooves of the two heat storage concrete blocks are connected into one body by the insertion of connecting rods. The manufacturing method comprises the following steps of: uniformly mixing raw materials by a dry process; adding water in an amount which is 4 to 6 percent based on the weight of the raw materials; uniformly mixing the raw materials and the water; placing a mixture in a steel mould which is provided with the heat exchange tube; demoulding after 24 hours; curing a product in water at the temperature of between 20 to 25 DEG C for 72 hours; and drying to form the prefabricated concrete heat storage module, wherein the raw materials comprise the following components: basalt aggregate, slag, aluminate cement, activated aluminum oxide powder, silicon powder, cyanite powder and natural graphite powder. The method for manufacturing the prefabricated concrete heat storage module for the solar heat power generation has the advantages of simple construction, low cost, convenient transportation, stable performance and the like.

The invention provided an integral type metal carrier three-way catalyst and a preparation method thereof. The preparation method is characterized by comprising the steps of: directly adding catalysis active component into sizing agent which contains coating materials such as active aluminum oxide, and the like, to form catalysis active component-containing compound sizing agent; directly coating the compound sizing agent on the surface of the integral type metal carrier; drying and roasting to obtain the integral type metal carrier three-way catalyst. The one-off loading quantity of the prepared metal carrier integral type three-way catalyst can be controlled in the range of 3%-20% (weight ratio) according to the adjustment of the solid content, the granularity and the viscosity of the sizing agent. The prepared catalyst has the coating with even depth, is stably loaded and hardly falling, and has simple and convenient preparation method, low cost and good catalysis performance.

The invention relates to a purification adsorbent based on a mesoporous molecular sieve material and a preparation method and application of the purification adsorbent based on the mesoporous molecular sieve material. The purification adsorbent based on the mesoporous molecular sieve material is characterized by comprising the following components in percentage by weight: 20%-60% of a mesoporous molecular sieve, 35%-75% of activated aluminum oxide and 3%-20% of metal components. The preparation method of the purification adsorbent based on the mesoporous molecular sieve material is characterized by comprising the following steps: firstly, mixing the mesoporous molecular sieve material, the activated aluminum oxide and the metal components, then carrying out extruding or disc granulation, and finally aging and activating so as to obtain an adsorbent product which is applicable to a temperature variation adsorption or pressure variation adsorption technology, and can work under a gas phase or liquid phase condition. Compared with the prior art, the prepared adsorbent containing the mesoporous molecular sieve has the advantages of being large in adsorption material duct, more beneficial to the adsorption of macromolecular impurities (such as disulphide), uniform in adsorption duct distribution, low in heat adsorption effect, and the like and has the deep adsorption function.

The invention discloses a method for preparing a tabular corundum brick for a working lining of a carbon-free steel ladle. The method comprises the steps of uniformly mixing the raw materials of the tabular corundum brick, and sequentially carrying out compression molding pressing and low-temperature baking to obtain the tabular corundum brick, wherein the tabular corundum brick comprise the following raw materials in parts by weight: 76-91 parts of tabular corundum, 0.5-9 parts of magnesia, 0.5-20 parts of magnesium-aluminum spinel, 1-9 parts of activated aluminum oxide ultrafine powder, 0.1-2 parts of activated silicon oxide ultrafine powder, 1.5-5 parts of a magnesium-aluminum cementing agent and 1.5-2.5 parts of water. The method for preparing the tabular corundum brick for the working lining of the carbon-free steel ladle is simple, the service life of the tabular corundum brick is long and free of carbon, and the tubular corundum brick can satisfy the demands on clean steelmaking.

The invention discloses a lubricating oil composite filter aid and a preparation method thereof. The composite filter aid is prepared through the steps of preparing materials, acidizing, washing, drying, roasting, sieving and mixing. The composite filter aid is prepared from materials of inorganic mineral substances and organic cellulose, wherein the mass percent of the mineral substances is 50 to 90%, and the mineral substances are chosen from at least two of activated clay, kieselguhr, bentonite, activated carbon, perlite, zeolite, attapulgite, sepiolite, vermiculite, activated aluminum oxide, coal ash, steel slag micropowder and superfine slag powder; the proportion of the organic cellulose is 10 to 50%, and the organic cellulose is chosen from one or more of saw powder, wood bit, bagasse, bran, paper pulp, rice hull, bamboo residue, straw shred residue and lignocellulose. The lubricating oil composite filter aid has the advantages of convenience in use, quick filtering speed and good cleaned oil quality, capability of serving as a filtering agent in a lubricating oil clay refining period and suitablity for adsorbing and filtering technologies of other petroleum products, and the cost is low.