W. R. Grace Co.

Raymond D Feldwick

Dean Alexander Denton

Richard J Nozemack

John A Rudesill

Darrell Edward Hildebrandt

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.

Catalyst manufacture

A catalyst that is especially useful in the production of aromatic nitriles by a fluidized bed process comprises highly attrition-resistant microspherical particles of vanadia and an inert support and is prepared by spray drying an aqueous slurry of finely divided particles of vanadia and the support.

Spray dried vanadia catalyst and method of preparing it

A process for preparing alumina-containing nodules characterized with improved mechanical properties which includes mixing powder of alumina, aluminosilicate, or mixtures thereof with an aqueous slurry having a pH in the range from about 7.5 to about 9 and comprising from about 0.2 to about 5 percent by weight of aluminum hydroxide, calculated as alumina, followed by forming, drying and calcining. The products include minor amounts of alumina binder and find use as sorbents, catalysts, and catalyst supports.

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Timonium, MD, United States of America

Raymond D Feldwick