Thermally stable coprecipitated catalysts useful for methanation and other reactions

Patent · Tue Nov 07 04:00:00 EST 1978

OSTI ID:6620773

Hansford, R C

Union Oil Co. of California has developed a procedure for preparing methanation catalysts having greater thermal stability than previous catalysts prepared by nonhomogeneous coprecipitation with alkaline, ionic reagents such as sodium carbonate, ammonium hydroxide, or ammonium carbonate. Comprising alumina and one or more of the iron group metals, the thermally stable catalysts 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 that, after hydrogen-reduction, is very active.

• Assignee: Union Oil Co. of California
• Patent Number(s): US 4124629
• OSTI ID: 6620773
• Country of Publication: United States
• Language: English

Related Subjects

090121* -- Hydrocarbon Fuels-- Chemical Synthesis-- (1976-1989)
10 SYNTHETIC FUELS
ALKALI METAL COMPOUNDS
ALUMINIUM
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
AMMONIUM CARBONATES
AMMONIUM COMPOUNDS
AMMONIUM HYDROXIDES
CARBON COMPOUNDS
CARBONATES
CATALYSTS
CHALCOGENIDES
CHEMICAL PREPARATION
CHEMICAL REACTIONS
ELEMENTS
HYDROGEN COMPOUNDS
HYDROXIDES
IRON
METALS
METHANATION
OXIDES
OXYGEN COMPOUNDS
PRECIPITATION
SEPARATION PROCESSES
SODIUM CARBONATES
SODIUM COMPOUNDS
SYNTHESIS
TRANSITION ELEMENTS