Catalyst manufacture
AssigneeW. R. Grace & Co.
InventorsRichard J. Nozemack, John A. Rudesill, Dean A. Denton, Raymond D. Feldwick
Life of this patent
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Abstract
Catalysts and catalyst supports are prepared by forming and drying, preferably spray-drying, an aqueous slurry of inorganic solids such as zeolites, clay, silica, alumina, and silica-alumina gel, and aluminum chlorhydrol to obtain particulate composites. The particulate composites are then reacted with ammonia in the absence of free liquid water to convert the aluminum chlorhydrol into a cohesive binder. The ammonia-reacted composites may then be washed, ion exchanged and thermally activated to obtain active attrition resistant catalysts and catalyst components.
Claims17
A method for preparing particulate inorganic oxide composites which comprises:
- (a) preparing a mixture containing (1) a solid finely divided inorganic oxide selected from the group comprising of zeolites, clay, alumina, silica, silica-alumina and mixtures thereof, (2) aqueous aluminum chlorhydrol, and (3) water;
- (b) forming and drying said mixture to obtain particulate aluminum chlorhydrol containing composites;
- (c) reacting said composites with ammonia essentially in the absence of free liquid water to convert the aluminum chlorhydrol into a cohesive binder;
- and
- (d) washing the reacted composites to remove soluble salts.
Dependencies are inferred from the claim text.