Abstract:
Catalysts for the title dehydrogenation had the formula AaMbMlcM"dBePyOx, where A = alkali metal and/or Tl; M = one or more of Ni, Co, Cu, Mn, Mg, An, Ca, Nb, Ta, Sn, Ba; M' = one or more of Fe, Cr, U, Th, V, Ti, La, rare earth; M" = one or more of An, B, Pb, Ge, Al, W, Mo; B = one or more of Bi, Te, As, Sb, Cd; a-y varied over a range, mostly from 0-20, were prepd. Data for 26 catalysts were given in terms of dehydrogenation of alkylaromatic compds. to alkenylaromatic compds.
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:
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:
Catalysts are provided which are useful in the oxidation of olefins to aldehydes and conjugated dienes and in ammoxidation of olefins to nitriles. The catalysts comprise the combined oxides of uranium and molybdenum and the combined oxides of uranium and molybdenum in combination with arsenic, bismuth, tin, vanadium, iron, nickel and cobalt.
Abstract:
Catalysts are provided which are useful in the oxidation of olefins to aldehydes and conjugated dienes and in ammoxidation of olefins to nitriles. The catalysts comprise the combined oxides of uranium and arsenic on a catalyst support and the combined oxides of uranium and arsenic promoted by molybdenum, boron, vanadium, tin, nickel, bismuth, chromium, iron, manganese, zinc, tungsten, antimony, cerium, cobalt or rhenium.
Abstract:
Very desirable oxidation catalysts are prepared by impregnating a catalytic oxide matrix containing at least cobalt and molybdenum, magnesium and molybdenum, nickel and mulybdenum, manganese and molybdenum with iron, bismuth, tellurium or a mixture thereof.