Abstract: A process for the removal of H.sub.2 S from a feed gas, and the production of sulfur therefrom, is effected by oxidation with oxygen and/or SO.sub.2 at temperatures between 250.degree. and 450.degree. F. The oxidation is conducted in the presence of an extremely stable oxidation catalyst comprising an oxide and/or sulfide of vanadium supported on a non-alkaline porous refractory oxide. Sulfur deposition and consequent catalyst deactivation are prevented by maintaining the partial pressure of free sulfur in the oxidation reactor below that necessary for condensation. H.sub.2, CO, and light hydrocarbons present in the feed gas are not oxidized. Typical uses of the process include the removal of H.sub.2 S and the production of sulfur from sour natural gases or gases obtained from the gasification of coal.Feed gases which contain SO.sub.2 and H.sub.2 S in mole ratios greater than 0.5, or which contain other gaseous sulfur compounds such as COS, CS.sub.2, SO.sub.

Abstract: A catalyst for incinerating H.sub.2 S to SO.sub.2 in the temperature range of 300.degree.-900.degree. F. comprises a vanadium oxide or sulfide supported on a refractory oxide comprising hydrogen mordenite.

Abstract: A process for the removal of H.sub.2 S from a feed gas, and the production of sulfur therefrom, is effected by oxidation with oxygen and/or SO.sub.2 at temperatures between 250.degree. and 450.degree. F. The oxidation is conducted in the presence of an extremely stable oxidation catalyst comprising an oxide and/or sulfide of vanadium supported on a non-alkaline porous refractory oxide. Sulfur deposition and consequent catalyst deactivation are prevented by maintaining the partial pressure of free sulfur in the oxidation reactor below that necessary for condensation. H.sub.2, CO, and light hydrocarbons present in the feed gas are not oxidized. Typical uses of the process include the removal of H.sub.2 S and the production of sulfur from sour natural gases or gases obtained from the gasification of coal.Feed gases which contain SO.sub.2 and H.sub.2 S in mole ratios greater than 0.5, or which contain other gaseous sulfur compounds such as COS, CS.sub.2, SO.sub.

Abstract: A process for the conversion of H.sub.2 S to SO.sub.2 in a feed gas containing H.sub.2 S is effected by oxidation with air or oxygen at temperatures between 300.degree. and 900.degree. F. The oxidation is conducted in the presence of an extremely stable oxidation catalyst comprising an oxide and/or sulfide of vanadium supported on a non-alkaline porous refractory oxide. The preferred catalyst comprises between 5 and 15 wt. % V.sub.2 O.sub.5 on hydrogen mordenite or alumina. Hydrogen, carbon monoxide, light hydrocarbons, and ammonia present in the feed gas are not oxidized. The invention is especially contemplated for use in treating waste gases from geothermal steam power plants.

Abstract: Catalysts having a high degree of thermal stability, comprising alumina and one or more of the iron group metals are prepared from aqueous solutions containing a dissolved aluminum salt, a salt of at least one of the iron group metals and a delayed precipitant such as urea. The solution is heated to a temperature sufficient to hydrolyze the delayed precipitant with resultant liberation of ammonia and carbon dioxide homogeneously throughout the solution, until the pH of the solution rises sufficiently to effect coprecipitation of the metal salts as hydroxides and/or carbonates. The resulting coprecipitate is then recovered, washed, dried, shaped and calcined in conventional fashion to obtain a final product which, after hydrogen-reduction is very active, and displays much greater thermal stability than corresponding prior art catalysts prepared by non-homogeneous coprecipitation with alkaline, ionic reagents such as sodium carbonate, ammonium hydroxide, or ammonium carbonate.

Abstract: A process for the conversion of H.sub.2 S to SO.sub.2 in a feed gas containing H.sub.2 S is effected by oxidation with air or oxygen at temperatures between 300.degree. and 900.degree. F. The oxidation is conducted in the presence of an extremely stable oxidation catalyst comprising an oxide and/or sulfide of vanadium supported on a non-alkaline porous refractory oxide. The preferred catalyst comprises between 5 and 15 wt.% V.sub.2 O.sub.5 on hydrogen mordenite or alumina. Hydrogen, carbon monoxide and light hydrocarbons present in the feed gas are not oxidized. The invention is especially contemplated for use in treating waste gases from geothermal steam power plants.

Abstract: Catalysts having a high degree of thermal stability, comprising alumina and one or more of the metals iron, cobalt, nickel, copper and zinc, are prepared from aqueous solutions containing a dissolved aluminum salt, a salt of at least one of the aforesaid metals in divalent form, and a delayed precipitant such as urea. With all components in homogeneous solution at a relatively low pH and temperature, the solution is heated to a temperature sufficient to hydrolyze the delayed precipitant with resultant liberation of ammonia and carbon dioxide homogeneously throughout the solution, until the pH of the solution rises sufficiently to effect coprecipitation of the metal salts as hydroxides and/or carbonates.

Abstract: Hydrocracking catalysts are disclosed consisting essentially of a physical, particle-form mixture of (1) a crystalline alumino-silicate component having a sodium content of less than 4 percent by weight, and (2) a hydrogenation component comprising a predominant proportion of a porous support, other than a crystalline aluminosilicate, and a minor proportion of at least one constituent exhibiting hydrogenation activity. Hydrocracking processes using such catalysts are also disclosed.