摘要:
Promoted phosphate catalysts have been found to be effective for the vapor phase condensation of saturated monocarboxylic acids or esters with formaldehyde, to produce unsaturated carboxylic acids or esters.
摘要:
The present invention is a homogeneous liquid phase process for the preparation of methyl-t-butyl ether by reacting isobutylene and methanol in the presence of a heteropoly acid of molybdenum, tungsten or vanadium. Other tertiary ethers may be obtained by substituting a different tertiary olefin for isobutylene, e.g. t-amyl methyl ether from 2-methylbutene-2 and methanol.
摘要:
A method and catalysts for producing a hydrogen-rich syngas are disclosed. According to the method a CO-containing gas contacts a water gas shift (WGS) catalyst, optionally in the presence of water, preferably at a temperature of less than about 450° C. to produce a hydrogen-rich gas, such as a hydrogen-rich syngas. Also disclosed is a water gas shift catalyst formulated from: a) Pt, its oxides or mixtures thereof; b) Ru, its oxides or mixtures thereof; and c) at least one of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sc, Y, Ti, Zr, V, Mo, Mn, Fe, Co, Rh, Ir, Ge, Sn, Sb, La, Ce, Pr, Sm, and Eu. Another disclosed catalyst formulation comprises Pt, its oxides or mixtures thereof; Ru, its oxides or mixtures thereof; Co, its oxides or mixtures thereof; and at least one of Li, Na, K, Rb, Cs, Mg, Ca, Sr, Ba, Sc, Y, Ti, Zr, V, Mo, Mn, Fe, Rh, Ir, Ge, Sn, Sb, La, Ce, Pr, Sm, and Eu, their oxides and mixtures thereof. The WGS catalyst may be supported on a carrier, such as any one member or a combination of alumina, zirconia, titania, ceria, magnesia, lanthania, niobia, zeolite, perovskite, silica clay, yttria and iron oxide. Fuel processors containing such water gas shift catalysts are also disclosed.
摘要:
Certain novel multiply promoted Mn-Sb oxides are superior catalysts for the ammoxidation of olefins to the corresponding unsaturated nitriles, the selective oxidation of olefins to unsaturated aldehydes and acids, and the oxydehydrogenation of olefins to diolefins.
摘要:
The present invention provides a novel amorphous metal alloy composition which reversibly stores hydrogen and is useful as the hydrogen storage electrode in an energy storage device. The amorphous metal alloy is made up of at least three elements with at least one element of Ag, Hg, or Pt; at least one element of Pb, Cu, Cr, Mo, W, Ni, Al, Co, Fe, Zn, Cd, Ru or Mn: and at least one element of Ca, Mg, Ti, Zr, Hf, Nb, V or Ta.
摘要:
A process for improving the performance of an ammoxidation catalyst comprising contacting said catalyst with a boron containing or heat decomposable boron compound to deposit boron on the catalyst.
摘要:
The present invention is a process for the oxidation of olefins to unsaturated aldehydes and acids using a catalyst containing antimony, iron, bismuth, molybdenum plus at least one of nickel, cobalt, magnesium, zinc, cadmium or calcium within certain compositional limits. These catalysts may also contain certain elements that further enhance the desirability of the oxidation process.
摘要:
Certain catalysts containing iron and molybdenum plus bismuth or tellurium and nickel, cobalt, manganese, magnesium, zinc, cadmium, calcium or beryllium have been found to give especially large volumes of acrylonitrile or methacrylonitrile in a given time when boron, gallium or indium are incorporated into the catalyst.
摘要:
Bismuth cerium molybdate catalysts promoted with alkali metal and other optional ingredients provide high yields of acrylonitrile in the ammoxidation of propylene.
摘要:
The ammoxidation of n-butane to acrylonitrile and hydrogen cyanide by a process comprising reacting a gaseous mixture containing n-butane, ammonia and oxygen in the presence of a metal promoted highly siliceous zeolite catalyst, where the zeolite is one comprising ZSM-5, ZSM-5-type aluminosilicate zeolites, or aluminum-free ZSM-5-type zeolites, is disclosed.