Abstract:
Process for preparing novel ruthenium phosphates in which a mixture of (1) a phosphorus acid, a phosphorus oxide or a phosphorus salt; (2) ruthenium, a ruthenium oxide or a ruthenium salt; and (3) a refractory oxide is first treated with H2S or gaseous ammonia at a temperature of about 0* to about 50*C. and then calcined.
Abstract:
V-P-Zr catalysts effective for the oxidation of alkanes to dicarboxylic acid anhydrides (e.g., maleic anhydride) are prepared by mixing vanadium pentoxide and a zirconium salt with a hydrogen halide, then adding phosphoric acid.
Abstract:
A catalyst composition and a process for preparing same comprising the reaction product of (a) an organometallic compound having the general formula R''nM, wherein n is an integer, at least one R'' is an alkyl group, an alicyclic group, or halogen or hydroxy or alkoxy radicals, or hydrogen, the remaining R'' groups are alkyl groups, alicyclic groups, alkaryl groups, aralkyl groups, aryl groups, or halogen or hydroxy or alkoxy radicals, and M is a metal of group II or group III of the periodic Table, (b) a co-catalyst component which is sulfur or a compound containing active hydrogen atoms, and (c) carbon dioxide. The catalyst composition is used in preparing copolymers of epoxy compounds with carbon dioxide.
Abstract:
There is disclosed a hydrotreating catalyst consisting of a support of molybdenum oxide-inorganic oxide gel and carried thereon nickel oxide and molybdenum oxide so as to provide an active catalyst having an increased content of molybdenum oxide over prior catalysts and the process of preparation thereof.
Abstract:
A reducing-dehydrating catalyst for synthesizing vinylaromatic compounds from aromatic carbonylic compounds, consisting mainly of 5 - 50 per cent by weight of magnesium sulfate and 50 - 95 per cent by weight of zinc oxide. The catalyst can also contain magnesium oxide, in which case the composition of the catalyst is as follows: MgSO4 5 - 20 per cent by weight, ZnO 45 - 88 per cent by weight and MgO 2 - 45 per cent by weight. The catalyst can contain also an additive of a hydroxide of an alkali metal taken in the amount from 0.05 to 1 per cent of the total weight of the catalyst. The catalyst is prepared by mixing an aqueous solution of magnesium sulfate and a suspension of zinc oxide, with subsequent evaporation of the reaction mixture, drying the prepared product and calcining it at a temperature from 250* to 400*C. The catalyst of the invention can be used for synthesizing divinylbenzenes from diacetylbenzenes, styrene from acetophenone, ethylvinylbenzene from ethylacetophenone and other vinylaromatic compounds by a single-step process, the yields and the purity of the final products being high.