Abstract:
A Pd catalyst for the redn. of nitro cpds. has an Al spinel support. The support pref. has a specific surface of 20-120 m2/g. and an av. pore dia. of 200-800 angstroms. the spinel-forming metal is pref. Co, Mg, Li, Ni, or Zn. The catalyst pref. contains 0.1-10, esp. 0.5-5wt.% Pd. It can be used (a) for the redn. of nitro cpds. in the presence of a liquid diluent, pref. recycled amine prodt., by trickling the reaction mixt. over the fixed catalyst at 50-240 degrees C under H2 pressure in a tube reactor, the heat of reation being removed by coolant surrounding the tube; (b) for the gas-phase redn. of mononitro cpds.; or (c) for the reductive alkylation of nitro cpds., by adding an aldehyde or ketone, pref. acetone, during hydrogenation. The catalyst is highly active and allows low reaction temps. to be used. the prodts. can be used, e.g., for the prodn. of isocyanates and plant-protection agents.
Abstract:
1358926 Electrocatalysts; coated electrodes SOLVAY ET CIE 29 July 1971 [29 July 1970] 35747/71 Headings B1E and B2E [Also in Divisions C7 and H1] Electrodes comprise a coating of catalytic material on a support made at least superficially of titanium or a titanium alloy, the catalytic material comprising one or more elements of the platinum group in the metallic and/or oxidised state and tellurium in the oxidised state. The tellurium may be partially replaced by molybdenum or tungsten and the catalytic material may also comprise chromium lead, bismuth, antimony, tin, cadmium, titanium, tantalum and/or niobium in the oxidised state. In the examples the compounds of the catalytic elements are applied in solution in an organic solvent to form a coating and the coated structure is heat-treated. The electrodes are tested in the electrolysis of brine with a flowing mercury cathode to produce chlorine. They can also be used in cathodic protection, water purification, other electrolytic processes and as fuel cell electrodes.
Abstract:
1,146,437. Hydrogen peroxide. LAPORTE CHEMICALS Ltd: 14 Nov., 1966 [25 Nov., 1965], No. 50184/65. Heading C1A. [Also in Division B1] H 2 O 2 is made in a cyclic process including alternate hydrogenation and' oxidation of anthraquinone derivatives in the presence of a catalyst comprising a macroreticular ion exchange resin, having a surface area of at least 5 m 2 /gm. carrying a deposit of one or more of Ru, Rh, Pd, Os, Ir and Pt.
Abstract:
1278424 Methanation catalysts CATALYSTS & CHEMICALS Inc 22 July 1969 [26 July 1968] 36673/69 Heading B1E [Also in Division C5] A catalyst precursor in the form of porous spheres which on calcination and reduction promotes reactions between carbon oxides and hydrogen to form methane comprises 5-40% NiO, 15-75% of a binder which is either an activated transition alumina, e.g. rho or eta alumina, or a calcium silicater or aluminate cement or mixture of these cements and 0-75% alumina other than the transition alumina. The ingredients are tumbled and sprayed with water to form spheres and parameters such as bulk densities, specific gravity, ratios of pore volumes to sphere volume, &c, are fixed within specified ranges by adjusting the proportion of water to obtain a loss of 20-40% when the spheres are ignited to be rendered porous.
Abstract:
1. A catalyst for hydrazine decomposition consisting essentially of a carrier having a pore volume of at least 0.1 cubic centimeters per gram and a specific surface area, measured in square meters per gram, equal to 195 (C.sub.p + 0.013 + 0.736 V.sub.p) where C.sub.p is the specific heat capacity of the carrier at about 25.degree. C in calories per gram per degree and V.sub.p is the pore volume of the carrier in cubic centimeters per gram and metal of the group consisting of iridium, and mixtures consisting of iridium and ruthenium deposited on said carrier in an amount between 20% and about 40% by weight of the catalyst and distributed through the pores thereof in discrete particles sufficiently separated from each other so that they do not sinter or fuse together when the catalyst is at hydrazine decomposition temperature.