Production of sulfur recovery catalyst from bauxite fines
AssigneeEngelhard Minerals & Chemicals Corporation
InventorRobert A. Burns
Life of this patent
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Abstract
Bauxite fines, preferably uncalcined, are mixed with an acid anion-containing alumina hydrosol having an aluminum/acid anion ratio in the range of from about 0.5:1 to about 2:1. The mixture is formed into particles by extrusion and then dried and calcined.
Claims6
A method for making ground particles of calcined or uncalcined bauxite ore into larger mechanically strong catalyst pellets which comprises thoroughly mixing said ground particles with an acid-anion containing alumina hydrosol and sufficient water to provide an extrudable mass, said hydrosol having an aluminum/acid-anion ratio in the range of about 0.5 to 2:1 when using calcined ore and in the range of about 0.5 to 1.5:1 when using uncalcined ore, said hydrosol being used in amount of 130 to 200 pounds, on an anhydrous weight basis, per ton of pellets, anhydrous weight basis, extruding said mass into pellets, and drying and calcining said pellets.
A process for making a pelleted sulfur recovery catalyst having mechanical strength which comprises mixing ground particles of uncalcined bauxite ore, said particles being finer than 30 mesh (Tyler), with a minor weight percentage of an alumina hydrosol and water sufficient to form an extrudable mass, said hydrosol having been prepared by reacting aluminum metal with a solution of aluminum chloride and having a ratio of aluminum to chloride in the range of about 0.5:1 to 1.5:1, thoroughly pugging said mass, extruding said mass to form pellets having a diameter in the range of about 3/16 inch to 8/16 inch, and calcining the pellets at a temperature in the range of from 500.degree. F. to 800.degree. F., said hydrosol being used in amount of 130 to 200 pounds, on a volatile-free weight basis, per ton of calcined pellets.
Dependencies are inferred from the claim text.