604 results about "Amorphous silica" patented technology

An acidic amorphous silica-amumina has a large specific surface area and a large pore volume. A carrier complex and a hydrotreating catalyst containing acidic amorphous silica-alumina, in particular a hydrocracking catalyst containing acidic amorphous silica-alumina in combination with a modified zeolite-Y, treats petroleum hydrocarbon materials to produce middle distillates. The amorphous silica-alumina has a SiO2 content of 10-50 wt. %, a specific surface area of 300-600 m2/g, a pore volume of 0.8-1.5 ml/g and an IR acidity of 0.25-0.60 mmol/g. The catalyst shows a relatively high activity and mid-distillate selectivity and can be particularly used in hydrocracking process for producing mid-distillates with a higher yield.

The present invention relates to a preparation method of a porous ceramic, the porous ceramic, and a use thereof in the electronic cigarette. The method of preparing a porous ceramic includes: mixing amorphous silica, aluminum oxide and iron oxide uniformly to obtain a mixture; sintering the mixture at a temperature of 1000° C. to 1400° C. for 0.5 hour to 3 hours to obtain a precursor; grinding the precursor to obtain precursor powder; mixing the precursor powder, sodium silicate, and porogen uniformly to obtain a premix; mixing and extruding the premix with water to obtain a molded body; and heat preserving the molded body at a temperature of 200° C. to 600° C. for 1 hour to 6 hours, and sintering the molded body at a temperature of 700° C. to 1200° C. for 0.5 hour to 3 hours to obtain the porous ceramic.

A maximum hydrogen catalyst of diesel oil and its production are disclosed. The catalyst consists of amorphous silica aluminum, modified beta molecular sieve, aluminum oxide, VIB family and VIII family metals. Modified beta molecular sieve has high silicon and crystallinity, small crystal grain and acidity. It has good cyclanes selective loop open and alkane isomerization. Its advantages include higher heavy oil hydrogen crack activity and middle oil selectivity, better diesel oil absorption and lower filtering point, and it improves density, colloidal matter, iodine value and color.

A flame retardant or flame resistant (FR) fiber blend is provided that comprises amorphous silica fibers and at least one FR fiber. A flame retardant fabric, manufactured from a blend of fibers comprises amorphous silica fibers and at least one FR fiber. Barrier fabrics, manufactured from a blend of fibers, are provided comprising amorphous silica fibers and at least one FR fiber.

A biofuel production method, catalyst and system. The method may include combining a feedstock comprising a carbonaceous material with a consumable catalyst to produce a feedstock/catalyst mixture, and subjecting the feedstock/catalyst mixture to a vacuum pyrolytic gasification and liquefaction process to produce one or more biofuels. The catalyst includes effective amounts of various catalyst constituents, which may include some or all of kaolin, zeolite, amorphous silica, alumina aluminum phosphate and rare earth elements. The system may include apparatus for heating the feedstock/catalyst mixture under selected temperature and vacuum pressure conditions to produce a gaseous effluent comprising one or more hydrocarbon fractions, and additional distillation and condensation apparatus to produce one or more liquid and gaseous fuels.

The invention belongs to the technical field of the advanced nanometre composite material, particularly to magnetic inorganic nano-particle/zeolite putamen compound microsphere and the preparation method. The invention first adopts the collosol-gel chemical synthesis, wraps a layer of amorphous silica on the external surface of the magnetic inorganic nano-particle, then uses the layer by layer self-assembly technology to adsorb the polyelectrolyte with positive charge and the zeolite nano-particle with negtive charge on the magnetic microsphere surface with negtive charge, finally wraps a layer of zeolite materials on the exterior of the magnetic microsphere through the air-solid phase crystal transformation technology, thereby obtaining the magnetic zeolite compound microsphere with the putamen structure. The compound microsphere has strong magnetic responsibility, and the surface can adsorb a great deal of polypeptide, thereby having wide application foreground on the aspect of bioseparation and high efficiency proteid enzymolysis. The invention has simple method, easy obtaining of the raw materials, which is suitable for the enlarged production.

A toner which combines excellent cleaning ability, image quality and durability, as well as a developer and an image forming method using the toner are provided. A toner comprising a toner base particle which comprises at least a binding resin and a colorant, and an external additive, wherein an external additive is a non-spherical amorphous silica particle and a major axis of the silica particle is 40 nm to 180 nm. An aspect wherein the non-spherical amorphous silica particle has a true specific gravity of 1.8 to 2.3 and the silica particle is hydrophobilized and a hydrophobilization degree is 40 or more, and an aspect wherein the non-spherical amorphous silica particle is produced by a dry system and a mass reduction rate is 5% by mass or less when the silica particle is heated from 30° C. up to 250° C. are preferable.

The invention relates to a method for preparing multifunctional titanium dioxide pigment with a chlorination method, which comprises the following steps of: blending a titanium dioxide primary product into titanium dioxide slurry by adopting a chlorination method and adjusting a pH value between 9.0 and 11.0; adding a phosphate dispersing agent and carrying out grinding treatment; removing a grinding medium from the slurry and heating; adding a water-soluble silicate solution for curing; adjusting the pH value of the slurry for forming amorphous silica and curing for forming a first coating layer; cooling the slurry to 50-70 DEG C; adding a sodium metaaluminate solution and curing; adjusting the pH value of the slurry between 8.0 and 9.0, curing and forming an amorphous alumina coating layer on the first coating layer; adding an aluminum salt solution, maintaining the pH of the slurry between 7.0 and 9.0 and curing; adjusting the pH value of the slurry between 6.0 and 7.0 and curing; and washing the slurry with deionized water till the conductivity of a filter cake is larger than 15,000 ohm.cm, and carrying out drying and steaming pulverizing treatment to obtain a finished product. The multifunctional titanium dioxide pigment prepared with the method has higher weather resistance, whiteness, covering capability, opacity and dispersibility and excellent processing performance in the fields of coating, plastics, papermaking, and the like.

The reduction of hysteresis in a silica-filled, vulcanized elastomeric compound is produced by mixing diene monomer and optionally monovinyl aromatic monomer with an initiator and a coordinator; effecting polymerization conditions; terminating polymerization with a terminator containing an organo-tin group to form a tin-coupled diene elastomer; compounding the tin-coupled diene elastomer with an amorphous silica filler and a vulcanization agent; and, effecting vulcanization. A pneumatic tire tread stock incorporating the vulcanized elastomer compound exhibits decreased rolling resistance in the tire.

A coating liquid for forming a low dielectric constant amorphous silica-based coating film with a dielectric constant of 3.0 or below and a film strength (Young's modulus) of 3.0 GPa or more, and also having a smooth surface with an excellent hydrophobicity. The coating liquid contains (1) a silicon compound obtained by hydrolyzing bis(trialcoxysilyl)alkane (BTASA) and alcoxysilane (AS) in the presence of tetraalkylammoniumhydroxide (TAAOH), or (2) a silicon compound obtained by hydrolyzing bis(trialcoxysilyl)alkane (BTASA), alcoxysilane (AS) and tetraalkylorthosilicate (TAOS) in the presence of tetraalkylammoniumhydroxide (TAAOH).

The present invention is directed to the synthesis of novel delaminated layered zeolite precursor materials prepared by fluoride/chloride anion-promoted exfoliation. The method comprises, for example, using a combination of fluoride and chloride anions at a mild pH in aqueous solution to affect delamination of a layered zeolite precursor. The method can also comprise using a combination of fluoride and chloride anions in a non-aqueous solution comprising an organic solvent. The method may be used in conjunction with either acidification or sonication, or both. The resulting delaminated zeolite precursors are then isolated. Precursors that are then isolated lack amorphous silica content. The UCB-1 product is an example of such a novel oxide material and is obtained in yields in excess of 90% without the need for sonication.

The invention relates to titanium dioxide paint and the method to manufacture that belongs to the improvement of durability and optical properties for titanium dioxide. The titanium dioxide paint includes rutile type or anatase type titanium dioxide particle that includes zirconia, amorphous silica and hydrated alumina coating. Moreover, it has organic coating absorbed or bonding on it.

The present invention provides an olefin epoxidation catalyst and a preparation method thereof. The catalyst comprises titanium-silicon molecular sieve, a binder and a metal oxide, wherein the binder is amorphous silica, and the metal oxide is an alkaline earth metal oxide. The preparation method comprises: preparing a mixture containing the titanium-silicon molecular sieve, the binder source, the alkaline earth metal oxide and the water; carrying out forming for mixture to obtain a formed body; drying and baking the formed body. The binder source is at least one selected from silica sol, silicane with at least two hydrolyzable groups, and siloxane with at least two hydrolyzable groups. The present invention further provides a method for epoxidation of the olefin. The method comprises that: the olefin contacts hydrogen peroxide in a solvent in the presence of the catalyst of the present invention. According to the present invention, the olefin epoxidation catalyst of the present invention provides high hydrogen peroxide conversion rate and high epoxide selectivity in the olefin epoxidation reaction.

PCT No. PCT/EP96/03246 Sec. 371 Date Feb. 12, 1999 Sec. 102(e) Date Feb. 12, 1999 PCT Filed Jul. 20, 1996 PCT Pub. No. WO97/08250 PCT Pub. Date Mar. 6, 1997Wax coated silica matting agent wherein the silica is an amorphous silica having a pore volume of at least 1.5 cm3/g, preferably at least 1.8 cm3/g. The wax coating is present in the range from 6% to 15% by weight of the matting agent and comprises a synthetic polyethylene wax.

Crystallization-inducing metal elements are introduced onto an amorphous silicon thin film. A first, low-temperature, heat-treatment induces nucleation of metal-induced crystallization (MIC), resulting in the formation of small polycrystalline silicon “islands”. A metal-gettering layer is formed on the resulting partially crystallized thin film. A second, low-temperature, heat-treatment completes the MIC process, whilst gettering metal elements from the partially crystallized thin film. The process results in the desired polycrystalline silicon thin film.

A thermoelectric module and methods for making and applying same provide an integrated, layered structure comprising first and second, thermally conductive, surface volumes, each in thermal communication with a separate respective first and second electrically conductive patterned trace layers, and an array of n-type and p-type semiconducting elements embedded in amorphous silica dielectric and electrically connected between the first and second patterned trace layers forming a thermoelectric circuit.

The invention relates to the technical field of ordered porous materials, in particular to a highly ordered porous silica and a porous silicon carbonitride material and a preparation method and application thereof. Under a certain temperature, egg white adopted as template and structure-directing agent is stirred and then hydrolytically polycondensed through oil-soluble silicon source capable of controlling hydrolysis, and the template is removed from the obtained mixture under different roasting conditions, so that the ordered porous silica and the ordered porous silicon carbonitride material can be respectively obtained. The two materials have the unique ordered structure of the egg white, and have a specific surface area and good heat stability. Compared with the conventional method, the invention has the advantages of low cost, simple preparation technique, environment-friendliness and the like, and the obtained materials have a broad application prospect in fields such as the controlled release, separation, adsorption and catalysis of large biological molecules and proteins.

Small amorphous silica particles are used to provide a relatively large surface area upon which silica will preferentially adsorb, thereby preventing or substantially reducing scaling caused by deposition of silica on evaporative cooling tower components, especially heat exchange surfaces. The silica spheres are contacted by the cooling tower water in a sidestream reactor, then separated using gravity separation, microfiltration, vacuum filtration, or other suitable separation technology. Cooling tower modifications for implementing the invention process have been designed.