Abstract:
A catalyst and a liquid phase process are provided for the dimerization of acrylic coumpounds. The process includes contacting an acrylic compound with the catalyst in the presence of hydrogen, wherein the catalyst comprises an inorganic oxide catalyst support, trivalent pendant atoms covalently bonded to the support and ruthenium complexed with said trivalent pendant atoms.
Abstract:
Compositions of matter and catalyst compositions effective for gas-phase conversion of propane to acrylic acid (via oxidation) or to acrylonitrile (via ammoxidation) and isobutane to methacrylic acid (via oxidation) and isobutane to methacrylonitrile (via ammoxidation) are disclosed. Preferred catalyst compositions comprise molybdenum, vanadium, niobium, antimony and germanium and molybdenum, vanadium, tantalum, antimony, and germanium. Methods of preparing such compositions and related compositions, including hydrothermal synthesis methods are also disclosed. The preferred catalysts convert propane to acrylic acid and/or to acrylonitrile and isobutane to methacrylic acid/methacrylonitrile with a yield of at least about 50 %.
Abstract:
Catalyseur et procédé en phase liquide pour la dimérisation de composés acryliques. Ce procédé comprend la mise en contact d'un composé acrylique avec le catalyseur en présence d'hydrogène, où le catalyseur comporte un support de catalyseur d'oxyde inorganique, des atomes pendants trivalents liés par une liaison covalente au support, ainsi que du ruthénium complexé avec lesdits atomes pendants trivalents.