摘要:
STABLE, HOMOGENEOUS PHOSPHORUS-MEDIFIED MOLYBDENUM CATALYSTS ARE PREPARED BY INCORPORATING PHOSPHORUS LIGANDS INTO MOLYBDENUM COMPOUNDS. THE MOLYBDENUM COMPOUNDS ARE PREPARED BY REACTING AN AMMONIA-CONTAINING MOLYBDATE WITH A HYDROXY COMPOUND, FOR EXAMPLE, AN ORGANIC PRIMARY OR SECONDARY ALCOHOL, A GLYCOL OR A PHENOL. THE HYDROCARBON-SOLUBLE PHOSPHORUS-MODIFIED MOLYBDENUM SOLUTIONS ARE USEFUL AS HOMOGENEOUS OXIDATION CATALYSTS, PARTICULARY FOR THE OXIDATION OF OLEFINS TO OLEFIN OXIDES. OLEFIN OXIDES ARE USEFUL IN THE MANUFACTURE OF NON-TOXIC ANTIFREEZE, URETHANE-GRADE POLYOLS AND MANY OTHER APPLICATIONS. THE CATALYST OF THE INVENTION MAY ALSO BE USED AS METAL-PLATING SOLUTIONS, LUBRICANT ADDITIVES, PIGMENTS, AMMOXIDATION CATALYSTS, PRINTING INKS, OR SOLUTION COMPOUNENTS FOR ORGANIC LASER DEVICES. THEY MAY ALSO BE USED AS CATALYSTS OR CO-CATALYSTS FOR VARIOUS POLYMERIZATION PROCESSES, SUCH AS HOMOPOLYMERIZATION OF ISOCYANATES, ISOCYANATE-POLYOL REACTIONS, OR OLEFIN OXIDE POLYMERIZATION REACTIONS.
摘要:
A catalyst support comprising at least 95% silicon carbide, having surface areas of ≤10 m2/g and pore volumes of ≤1 cc/g. A method of producing a catalyst support, the method including mixing SiC particles of 0.1-20 microns, SiO2 and carbonaceous materials to form an extrusion, under inert atmospheres, heating the extrusion at temperatures of greater than 1400° C., and removing residual carbon from the heated support under temperatures below 1000° C. A catalyst on a carrier, comprising a carrier support having at least about 95% SiC, with a silver solution impregnated thereon comprising silver oxide, ethylenediamine, oxalic acid, monoethanolamine and cesium hydroxide. A process for oxidation reactions (e.g., for the production of ethylene oxide, or oxidation reactions using propane or methane), or for endothermic reactions (e.g., dehydrogenation of paraffins, of ethyl benzene, or cracking and hydrocracking hydrocarbons).
摘要:
Disclosed herein are reaction compositions comprising an oxidation catalyst, a solvent, and a substrate that is dissolved in the solvent. The oxidation catalyst comprises a metal ion complexed with an α-keto acid and a tridentate N,N,O-ligand. Also disclosed herein are methods for oxidizing a C—H bond of a molecule, the methods comprising contacting the molecule with a metal complex comprising a metal ion complexed with a tridentate N,N,O-ligand in the presence of an α-keto acid and a solvent. In some embodiments, the oxidation catalyst or metal complex is linked to a solid support.