85 results about "Aluminum hydrate" patented technology

The invention is a method of recovering nickelic and aluminum from waste aluminum-based nickel catalyst, it has the characters of novel technique, reasonable flow, simple and convenient method and easy operation, and convenient scaled production, and benefits environmental protection. It includes the steps: sodium carbonate sintering and state-changing--boiling water dissolving sodium aluminate and separating aluminum--- making reducing-matte-making melting on nickel residues to obtain nickel matte Ni3S2-FeS-Ni-Fe alloy or copper-nickel matte Cu2S-Ni3S2-FeS alloy---blowing to obtain high-grade nickel matte Ni3S2 or high-grade copper-nickel matte Cu2S-Ni3S2-Cu-Ni alloy---desiliconizing crude NaAlO2 solution---making carbonated decomposition to obtain aluminum hydrate Al2O3íñ3H2O---calcining to obtain anhydrous aluminum oxide alpha-Al2O3. It is suitable to recover nickel and aluminum from the waste residue generated by extracting molybdenum and vanadium from waste aluminum-based nickelic catalysts and disabled catalysts containing nickel, aluminum, molybdenum and vanadium.

A catalyst for selectively oxidizing carbon monoxide in a hydrogen-containing gas comprises an alumina hydrate carrier and at least platinum supported thereon. With an aluminum hydrate as a carrier, the catalyst is resistant to deactivation which would be caused by an oxygen-containing hydrocarbon in a hydrogen-rich gas. The method for selectively removing carbon monoxide comprises the steps of adding oxygen to a hydrogen-rich gas containing carbon monoxide, in an amount necessary to oxidize at least part of carbon monoxide, and bringing the resulting mixture into contact with the catalyst for selectively oxidizing carbon monoxide. The solid polymer electrolyte-type fuel cell system utilizes the above method for selectively removing carbon monoxide.

To provide an ink for inkjet recording containing water, water-soluble organic solvent, water-dispersible resin, fluorochemical surfactant or derivative thereof, and coloring agent containing pigment, wherein the ink has a surface tension of 20-35 mN/n and viscosity of 5 mPas or more at 25 DEG C, total amount of the water-dispersible resin and the coloring agent in the ink is 5-40% by mass, and mass ratio A/B of the water-dispersible resin A to the coloring agent B is 0.5-4, wherein the ink is applied for a recording medium for inkjet recording containing a support containing cellulose pulp, and one or more barrier layers disposed on at least one face of the support, and wherein the barrier layer contains 30% by mass or more of inorganic pigment having refractive index of 1.5 or more, excluding aluminum hydrate, and 10% by mass or more of inorganic pigment having a refractive index of less than 1.5.

A process for extracting aluminum hydroxide (or oxide) from coal gangue and using the residual dregs to prepare cement includes such steps as calcining coal gangue, mixing with lime or calcium carbide dregs and water, steam pressure reaction to generate the resultant containing hydrated calcium silicoaluminate and calcium hydroxide, calcining to obtain the dodecylcalcium hepatoaluminate and dicalcium silicate, extracting in sodium carbonate solution, adding lime for desiliconizing, carbonizing to obtain aluminum oxide, calcining to obtain aluminum oxide, and using the SiCa dregs to prepare cement.

A fire-proof paint modifier of tunnel based on polymer/clay inserting layer modification technology and its production are disclosed. The modifier consists of polymer, modified clay and additive, polymer is bromo-bisphenol A epoxy resin or amino resin solution, modified clay is insert modified roseite, concavo-convex rod clay or montmorillonite, and additive is expendable graphitic, magnesium hydroxide, aluminum hydrate and nanometer TiO2. The process is carried out by destroying clay structure, stripping it into basic unit, dispersing in polymer matrix, and obtaining modifier. Its advantages include better hydrophobicity and thermal stability, higher strength and toughness, to prevent smoke from eroding and improve corrosion and water resistances.

The invention relates to a platy-monocrystal alpha-aluminum oxide, and a preparation method and application thereof, belonging to the field of inorganic non-metal materials. The method comprises the following steps: a. by using aluminum hydrate or transitional-phase aluminum oxide as a raw material, adding a fused salt, mixing, and grinding; b. adding a fluoride into the ground material in the step a, grinding, and uniformly mixing to obtain a mixture; c. calcining the mixture at 700-1200 DEG C at the heating rate of 1-20 DEG C/minute for 0.5-4 hours, and cooling to room temperature; d. dissolving the cooled material in the step c in 60-100-DEG C hot water, washing and filtering; and e. repeating the step d until the fused salt is completely removed, and drying to obtain the platy-monocrystal alpha-aluminum oxide. The preparation method has the advantages of simple technique and no environment pollution. The prepared alpha-Al2O3 has the advantages of controllable shape, uniform size and favorable dispersity, and can be used in a high-polymer material as a heat-conducting filler for enhancing the heat conductivity coefficient.

PCT No. PCT/FR96/01609 Sec. 371 Date Sep. 22, 1998 Sec. 102(e) Date Sep. 22, 1998 PCT Filed Oct. 15, 1996 PCT Pub. No. WO97/14759 PCT Pub. Date Apr. 24, 1997Alumina-based abrasive grains having a skin constituted by a mixture of finely dispersed aluminum hydrate and sodium silicate, and a process for the production of such grains consisting of (a) preparing a gel by mixing a solution of sodium silicate and a colloidal solution of aluminum hydrate in acid medium, (b) coating the abrasive grains with the gel in an amount of 0.1 to 5 percent weight, and (c) subjecting the coated grains to a drying treatment at a temperature of between 100 and 500 DEG C. The grains according to the invention are used for the manufacture of cloths and abrasive paper and also grinding wheels.

Production of aluminum hydrate from aluminum ash is carried out by mixed agitating in proportion=100:80-120 of aluminum ash and solid sodium carbonate, melting solid mixture at 900-1500 degrees C for 1-5hrs, immersing melts in water above 10hrs, removing deposits to obtain sodium aluminate solution, adding sulfuric acid into sodium aluminate solution in proportion=2:0.9-1.1mol, solid-liquid separating by filter to obtain aluminum hydrate deposits and sodium sulfate solution, drying aluminum hydrate deposits at 20-80 degrees C and crushing to obtain final product. It is cheap and simple, has no environmental pollution and uses of regenerative resources fully.

An acrylic or other polymer composition, optionally containing aluminum trihydrate, and having undoped or doped titanium dioxide dispersed throughout is disclosed. Said composition provides a “renewable” surface and further provides a highly-sterile surface upon photoactivation of the surface by at least either low-level ultraviolet irradiation or ambient/natural light (as when using doped titanium dioxide).

The invention concerns a process that uses an ion exchanger resin to recover the sodium contained in industrial alkaline waste and, in particular, in the "red mud" and sodium effluents coming from the manufacture of aluminum hydrate according to the Bayer process. It includes putting the alkaline resins (1), usually "red mud" in the form of an aqueous suspension in contact with an RH+ type cationic resin, preferably, a carboxylic resin to attach the sodium selectively and quantitatively to the resin (5) and then to extract it quantitatively in the form of NaOH (8) by displacement using a lime suspension (6), preferably, lime milk. The resin (9), after attaching the calcium, is then regenerated for reuse at the beginning of the process (2) by elution of the calcium as CaCl2 (12) with a diluted hydrochloric acid solution (10).

The invention relates to a catalyst of hydrodesulfurization of heavy oil and residual oil and its preparing method. The catalyst takes gama-Al2O3 as its carrier, with VIB family and VIII family metals as active components, and with Ti etc. as active assistants. The catalyst assistants Ti of the invention is drawn into by ultrasonic wave in aluminum hydrate gelatinization. The catalyst is prepared by complete mixed kneading method, i.e., adding alkaline solution containing Mo and / or W into aluminum hydrate dry gel powder of Ti drawn by ultrasonic wave to intensively mix until aluminum hydrate powder is wetted by alkaline solution completely, re-adding acid solution containing Co and/or Ni to be mixed until materials become plastic body, extrusion molding, drying, and roasting to get catalyst. Distribution of the catalyst assistants Ti prepared by the method is of more uniform, having pore capacity and specific area improved apparently with excellent performance in use.

The invention belongs to the technical field of material preparation, and provides a hollow fiber ceramic membrane with high filtering flux and a preparation method thereof. The hollow fiber ceramic membrane comprises the following components in parts by weight: 40-80 parts of powdery aluminum hydrate, 10-20 parts of powdery soft refractory ball clay, 1-10 parts of powdery albite, 1-10 parts of powdery dolomite, 6-10 parts of powdery borosilicate glass powder, 1-7 parts of carboxymethyl cellulose and 1-3 parts of glycerin, and is prepared through burdening, ball milling, mud squeezing and dehydration, vacuum pressing, extrusion molding and sintering. Preferably, the outer diameter of the hollow fiber ceramic membrane with high filtering flux is 3-6 millimeters, the inner diameter is 1-2 millimeters, and the length is 100-1,000 millimeters; and the porosity factor is 50-56 percent, the pure water flux is 10,000-12,500 L/m<2>.h.Mpa, and the bending strength is 35-85 MPa, which are 3-5 times that of an ordinary hollow fiber ceramic membrane.

Presented are solar reflective coating compositions comprising a mixture of polymeric binder system of acrylic and alkyd dispersion. Also presented are various fillers and pigments of high infra-red (IR) reflecting property of large crystalline size containing aluminum dioxide, titanium dioxide, aluminum trihydrate and silicon dioxide particles.

The invention discloses a high-chlorine-capacity high-strength alumina de-chlorinating agent, which is characterized by consisting of 30-60 percent by weight of aluminum hydrate and 30-50 percent by weight of sodium hydrate, preferably by consisting of 55 percent by weight of alumina and 45 percent by weight of sodium hydrate. The de-chlorinating agent is prepared by the following steps of: precipitating and mixing to form a colloid; and recrystallizing the colloid, washing, drying and baking. The de-chlorinating agent has the advantages of high pore capacity, long service life, high mechanical strength, wear resistance, small amount of dust, no blockage of an equipment pipeline, low treatment cost, long service cycle, good comprehensive using effect and the like, and is widely applied to de-chlorinating industrial towers.

The present invention is directed to a method for making a sulfur tolerant alumina, that includes the steps of: forming aluminum hydrate from one or more water soluble aluminum salts, said salts each comprising an aluminum cation or aluminum anion and an oppositely charged counterion, in an aqueous medium, contacting the aluminum hydrate with a silica precursor in the aqueous medium and in the presence of counterions of the one or more aluminum salts, isolating silica precursor-contacted aluminum hydrate particles from the aqueous medium, and calcining the silica precursor-contacted aluminum hydrate particles to form particles of the sulfur tolerant alumina.

The invention discloses a waste catalyst recycling method, and particularly discloses a method for preparing a hydrogenation catalyst from a molybdenum-nickel waste catalyst. The method comprises thefollowing steps of: carrying out mixed roasting and leaching on pretreated molybdenum-nickel waste catalyst powder and alkali to obtain a molybdate solution and aluminum oxide filter residues, and adjusting the pH value of the molybdate solution to remove aluminum ions to obtain molybdic acid; mixing the aluminum oxide filter residues with alkali, and carrying out secondary roasting and leaching to obtain a sodium aluminate solution and a nickel oxide solid; cooling and crystallizing the sodium aluminate solution, performing filtering and separation to obtain a hydrated sodium aluminate solidand a diluted sodium aluminate solution; drying the hydrated sodium aluminate solid to obtain sodium aluminate; introducing carbon dioxide into the dilute sodium aluminate solution, and obtaining a first-stage product after a reaction is finished; carrying out second-stage parallel flow reaction on the first-stage product and acid liquor; and finally, performing aging, filtering and drying to obtain pseudo-boehmite. According to the method of the invention, the pore volume of the pseudo-boehmite is effectively increased, and the problem of repeated utilization of a waste catalyst carrier is solved.

The invention relates to a car external-decorating paint iso-phthalic sheet mould plastic safety bar, using iso-phthalic unsaturated polyester as main material, calcium carbonate or/and aluminum hydrate as filling, peroxides as initiator, alkaline earth oxide or/and hydrate as thickening agent, polystyrenes or polyvinyl acetates as low-contraction additive, and stearic acid or stearates as internal mold release, mixing uniformly to make into resin paste, coating the resin paste on the loading film of sheet-making set, adding in glass fiber as reinforcing material to dip and compound to make into sheets, then pressing the sheets into pressed products of the safety bar, and then spraying paint to make into the finished products. It has good mechanical performance, chemical corrosion resistance, good tenacity and water resisting property, etc.

This invention relates to an imitation marble decorative material and manufacturing method thereof. This imitation marble comprises the semiopaque outer layer and substrate, between which is the printed natural marble pattern resembling with that of natural one. The out layer contains resin, aluminum hydrate powder, cobalt iso-octoate, methylethyl ketone peroxide, sands and dye paste. While, the substrate contains resin, cobalt iso-octoate, methylethyl ketone peroxide, sand and dye paste.

The invention relates to a low temperature resistant oil-proof type halogen-free flame retardant cable material, comprising the following raw materials in parts by weight: 100 parts of ethylene-vinyl acetate, 10-15 parts of vinyl resin with polar groups, 29-40 parts of polyether polyurethane resin, 140-170 parts of aluminum hydrate, 15-55 parts of magnesium hydrate, 3-5 parts of antioxidant, 10-15 parts of plasticizer and 4-5 parts of crosslinking agent. The cable material related in the invention is halogen-free, and cannot release toxic gas harmful to human body if burning on ships. The cable material also meets the requirement on flame retarding property of cables on general purpose vessels, and the polymer resin material under the low temperature condition of -40 DEG C still can keep elasticity. Meanwhile, the cable material meets the requirement of the standard IEC (International Electrotechnical Commission) 60092-359 on oil-proof property of cables on ships, and also meets the requirement of the standard NEK(Norsk Electrotecnisk Komite)606 on oil-proof property of marine structures.

The present invention relates to materials for making cable jackets, particularly for riser and plenum cables. The materials provide low flammability and allow the cable to meet UL 910 or NFPA-262 or UL 1666 specifications. The composition contains polyvinyl chloride (PVC) resin, a plasticizer, ammonium octamolybdate, a molybdate compound, a stabilizer, a lubricant, aluminum trihydrate, and either i) metal oxide particles, ii) a polytetrafluoroehtylene (PTFE), iii) an intumescent compound, or iv) combinations thereof.

The invention relates to a method for performing microwave-assisted extraction on different forms of arsenic selenium from coal ash sequentially. According to the method, arsenic selenium with different adsorption states is extracted by using a microwave digestion instrument and adding different extracting agents under different microwave conditions. The method comprises the following steps: performing earlier-stage treatment on a coal ash sample; extracting arsenic selenium with a nonspecific adsorption state (form 1); extracting arsenic selenium with a specific adsorption state (form 2); andextracting arsenic selenium with an amorphous form and weak crystalline iron aluminum hydrated oxide combined state (form 3), wherein different forms of arsenic selenium need different microwave extraction power, temperature and time. Compared with the traditional vibrating extraction scheme, the method has the following advantages: the extraction time is greatly shortened, the result is stable,and high repeatability and reproducibility are presented.