Loading patent…
AssigneeEngelhard Corporation
InventorsDeepak S. Thakur, Eugene Palka, Thomas J. Sullivan, Eugene Nebesh, Brian D. Roberts
Estimating the term…
This hydrogenation catalyst comprises a major amount of the oxides of a first metal selected from copper or zinc, a second metal selected from chromium, molybdenum, tungsten and vanadium, and optionally, a minor amount of the oxide of a promoter metal selected from the group consisting of manganese, barium, zinc, nickel, cobalt, cadmium, iron and any combination thereof provided that the promotor metal is not zinc if the first metal is zinc. The average particle diameter of the powder is from about 6 to about 20 microns; and the particle surface area is from about 20 to about 70 m.sup.2 /g. The process for preparing this catalyst comprises the steps of (A) simultaneously and adding to a first vessel, (1) a first aqueous solution comprising a copper or zinc salt; (2) a second aqueous solution comprising a soluble base, provided that either the copper solution or the soluble base solution also contains a soluble salt of at least one second metal; or (3) a third aqueous solution comprising a soluble salt of at least one seocnd metal is added simultaneously to the first vessel whereby an aqueous slurry of insoluble solid is formed in the first vessel, provided further that the second metal is chromium, molybdenum, tungsten, or vanadium; (B) advancing at least a portion of the aqueous slurry from the first vessel to a second vessel; (C) recovering the solids from the aqueous slurry in the second vessel; and (D) calcining the recovered solids.
A process for preparing a catalyst comprising the oxides of copper or zinc and at least one additional metal which comprises the steps of
A process for preparing a catalyst comprising the oxides of copper and chromium which comprises the steps of
A process for preparing a catalyst comprising the oxides of copper, chromium and manganese which comprises the steps of
A catalyst in powdered form comprising a major amount of the oxides of a first metal selected from the group of copper or zinc and a second metal selected from chromium, molybdenum, tungsten and vanadium, and, optionally, a minor amount of the oxide of a promoter metal selected from the group consisting of manganese, barium, zinc, nickel, cobalt, cadmium, iron and any combination thereof, provided that promoter metal is not zinc if the first metal is zinc, and wherein the average particle diameter of the powder is from about 6 to about 20 microns;
Dependencies are inferred from the claim text.