Abstract:
Materials and associated processes for making the materials. For example the material may include alpha alumina crystalline whiskers. The process may include conducting the process as hydrothermal, and producing the whiskers to have a length to diameter aspect ratio of at least two.
Abstract:
A method for producing synthetic magadiite, including the step of: heating a liquid aqueous colloidal silica suspension, the liquid aqueous colloidal silica suspension having a mole ratio of sodium hydroxide to silica and a mole ratio of water to silica effective to produce a synthetic magadiite wherein more than fifty percent by weight of the synthetic magadiite is platy synthetic magadiite. The synthetic platy magadiite can be converted to the acid form and: (a) heated to produce quartz-like plates; or (b) alkylated to produce an organophilic material. A method for the production of platy sodium octasilicate and a method for preparing a liquid aqueous colloidal silica dispersion having a mole ratio of silica to sodium oxide of 3.5 to 10 are further disclosed.
Abstract:
The invention relates to silica gel compositions containing acidified cation exchanging layered silicate materials and methods for preparing such compositions. These silica gel compositions can be contacted with metallocene polymerization catalysts to produce a catalyst composition.
Abstract:
A layered inorganic material possessing organophilic properties and comprising acid-treated layered platy silicate functionalized with organic molecules having alcohol functionality; a nanocomposite comprising the inorganic layered material and a method for preparing the inorganic layered material which comprises contacting a layered inorganic material with a protonic acid and then contacting the acidified layered inorganic material with an alcohol.
Abstract:
A coating composition comprising platy magadiite pigment(s); a paper product comprising platy magadiite pigments; and an aqueous suspension comprising platy magadiite and a suspending agent selected from the group consisting of ;polyacrylate polymers, polyvinylalcohol polymers, maleic anhydride-containing copolymers, and polyphosphates, and a latex dispersion or emulsion of latex polymers selected from the group consisting of styrene butadiene polymers, acrylic polymers, carboxylated acrylonitrile :butadiene polymers, polyvinylchloride, polyvinyledenechloride, polystyrene, fluorinated polyethylene and polypropylene, and polytetrafluoroethylene; and an article or formulation comprising a platy layered silicate.
Abstract:
A process of preparing an alkylated benzene or mixture of alkylated benzenes involving contacting a benzene feedstock with a solid acid, such as an acidic clay or acid zeolite, in a pretreatment zone at a temperature greater than about 130 DEG C but less than about 300 DEG C to form a pretreated benzene feedstock, and thereafter contacting the pretreated benzene feedstock with (a) an alkylating agent in an alkylation zone or (b) a transalkylating agent in a transalkylation zone, in the presence of an alkylation/transalkylation catalyst so as to prepare the alkylated benzene or mixture of alkylated benzenes. The pretreatment step improves the lifetime of the alkylation/transalkylation catalyst. Preferred products are ethylbenzene and cumene.
Abstract:
A hydrocracking process for the conversion of high boiling hydrocarbon feedstocks, particularly paraffin-base petroleums, into lower boiling hydrocarbon mixtures enriched in C5, C6 and C7 high octane isoalkanes. The process involves contacting a high boiling hydrocarbon feedstock with hydrogen under reaction conditions in the presence of a hydrocracking catalyst containing a hydrogenation metal and an acidic mordenite zeolite. The high octane hydrocarbon products are useful in transportation fuels.
Abstract:
A process of alkylating benzene or substituted benzene with an alkylating agent having from two to eighteen carbon atoms in the presence of a catalyst comprising an acidic mordenite zeolite having a silica/alumina molar ratio of higher that 160:1 and a crystalline structure which is determined by X-ray diffraction to have a Symmetry Index of at least 1, under temperature and pressure conditions sufficient to keep the reaction mixture in the liquid phase, and the molar ratio of benzene or substituted benzene to alkylating agent is less than 3:1 and greater than 1:1.
Abstract:
A hydrothermal process for making Alpha Alumina ((α-AI 2 O 3 ) crystalline nano-sized powders in the form of at least one of nano-sheets and nano-fibers, the process includes making the Alpha Alumina with an aspect ratio of diameter to thickness ratio of at least two, and with at least one dimension of diameter or thickness being less than 100 nm. A composition in accordance with the process. A porous ceramic that includes the composition.
Abstract translation:用于制备纳米片和纳米纤维中的至少一种形式的α氧化铝((a-Al 2 O 3))结晶纳米尺寸粉末的水热法,该方法包括使具有直径与厚度比的纵横比的α-氧化铝 至少两个,并且具有至少一个直径或厚度的尺寸小于100nm。根据该方法的组合物。包含该组合物的多孔陶瓷。
Abstract:
Materials and associated processes for making the materials. For example the material may include alpha alumina crystalline whiskers. The process may include conducting the process as hydrothermal, and producing the whiskers to have a length to diameter aspect ratio of at least two.