Abstract:
A process that can be used for sulfonating, sulfating, or sulfamating an organic compound is disclosed. The process can comprise, consist essentially of, or consist of, contacting the organic compound with sulfur trioxide under a condition sufficient to effect the sulfonation, sulfation, or sulfamation of the organic compound. The organic compound can be an aromatic compound, alcohol, carbohydrate, amine, amide, protein, or combinations of two or more thereof. The sulfur trioxide can be present in a complex comprising an inorganic support such as zeolite, silicalite, silica, titanosilicate, borosilicate, clay, aluminophosphate, and combinations of two or more thereof.
Abstract:
This invention provides an attrition resistant catalyst composition and method for producing such composition. The catalyst is comprised of an acidic zeolite, rho or chabazite, and a particulate binder, kaolin, bentonite, alpha-alumina, or titania, which can be optionally modified by treatment with a compound containing Si, Al, P or B. This invention further provides a process for producing methylamines, preferably dimethylamine, comprising reacting methanol and/or dimethyl ether and ammonia in the presence of a catalytic amount of an attrition resistant catalyst of the invention.
Abstract:
Mixtures of CClF.sub.2 CF.sub.3 (CFC-115) and CHF.sub.2 CF.sub.3 (HFC-125) can be substantially separated by using carbon nanotubes as a sorbent for CClF.sub.2 CF.sub.3. A process is described for treating a starting mixture of CHF.sub.2 CF.sub.3 and CClF.sub.2 CF.sub.3 to provide a product wherein the mole ratio of CHF.sub.2 CF.sub.3 to CClF.sub.2 CF.sub.3 is increased relative to the mole ratio of CHF.sub.2 CF.sub.3 to CClF.sub.2 CF.sub.3 in the starting mixture; and another process (involving desorbing sorbed CClF.sub.2 CF.sub.3) is disclosed for treating a starting mixture of CClF.sub.2 CF.sub.3 and CHF.sub.2 CF.sub.3 to provide a product mixture wherein the mole ratio of CClF.sub.2 CF.sub.3 to CHF.sub.2 CF.sub.3 is increased relative to the mole ratio of CClF.sub.2 CF.sub.3 to CHF.sub.2 CF.sub.3 in the starting mixture. The process for producing a CHF.sub.2 CF.sub.3 -enriched product and the process for producing a CClF.sub.2 CF.sub.3 -enriched product may be integrated into an overall process (e.g., a thermal swing cycle process) where both of said products are provided. Production of high purity HFC-125 is disclosed.
Abstract:
Provided are processes for the production of titanium dioxide from ilmenite. In these processes, ilmenite is digested with aqueous ammonium hydrogen oxalate. Iron from the ilmenite precipitates as a hydrated iron oxalate and is removed by filtering, leaving a titanium-rich solution. The titanium-rich solution can be further processed to form titanium dioxide.
Abstract:
Provided are processes for the production of titanium dioxide from ilmenite. In these processes, ilmenite is digested with aqueous trimethylammonium hydrogen oxalate. Iron from the ilmenite precipitates as a hydrated iron oxalate and is removed by filtering, leaving a titanium-rich solution. The titanium-rich solution can be further processed to form titanium dioxide.
Abstract:
The present invention relates to a process for selectively removing undesired oligosaccharides from aqueous mixtures such as plant processing waste products, including soy whey and other vegetable wheys, using an ultrastabilized large pore, hydrophobic zeolite Y. The resulting solution, which contains isoflavones and digestible sugars such as glucose, fructose and sucrose, can serve as the basis for a nutritious new product.
Abstract:
This invention relates to gas separation processes using a Li-rho zeolite, in particular to an air separation process where the Li-rho zeolite is an oxygen selective adsorbent.
Abstract:
Described is a process to synthesize nano-size Zeolite A from an amorphous gel precursor which can be synthesized via reaction of NaAlO2, NaOH, and tetraethoxysilane (TEOS). Zeolite A with particle sizes of ˜150 nm was made by transformation of the amorphous precursor in (CH3)4NOH solution with Zeolite A seeding. The nano-sized Zeolite A can be part of processes for making non-phosphate detergent where the as-synthesized Zeolite A used as builders, for making thin films for separation and/or catalysis, for making secondary ordered patterns.
Abstract translation:描述了从无定形凝胶前体合成纳米尺寸沸石A的方法,该无定形凝胶前体可以通过NaAlO 2 H 2,NaOH和四乙氧基硅烷(TEOS)的反应合成。 通过将(CH 3/3)4NH 4 NOH溶液中的无定形前体与沸石A接种进行转化,制备粒径为〜150nm的沸石A. 纳米尺寸的沸石A可以是制备非磷酸盐洗涤剂的方法的一部分,其中合成的沸石A用作助洗剂,用于制备用于分离和/或催化的薄膜,用于制备二次有序图案。
Abstract:
This invention provides an attrition resistant catalyst composition and method for producing such composition. The catalyst is comprised of an acidic zeolite, rho or chabazite, and a particulate binder, kaolin, bentonite, alpha-alumina, or titania, which can be optionally modified by treatment with a compound containing Si, Al, P or B. This invention further provides a process for producing methylamines, preferably dimethylamine, comprising reacting methanol and/or dimethyl ether and ammonia in the presence of a catalytic amount of an attrition resistant catalyst of the invention.
Abstract:
A process is disclosed for producing HCFC-133a which includes reacting certain trihaloethene starting materials (e.g., trichloroethene) with HF in the gaseous phase at an elevated temperature in the presence of certain supported metal catalysts containing effective amounts of zinc. A catalyst of metal fluoride on a fluorinated alumina support having an atomic ratio of F to Al of at least 2.7:1 and containing .beta.-aluminum fluoride, is employed.