W. R. Grace Co.

Edwin W Albers

David E Vaughan

Roger Jean Lussier

John Storey Magee, Jr

Mark A Seese

Grant C Edwards

John S Magee

George J Surland

Joseph S Dumoulin

A dense, highly attrition resistant catalyst is prepared by reacting an alkali-metal silicate and aluminate under conditions which produce a thermally and hydrothermally stable cogel having a substantial surface area in pores ranging from about 25 to 75A.degree.. The catalyst includes excess silicate obtained as a by-product from a Type Y zeolite synthesis.

Hydrocarbon conversion catalyst preparation

A dense, attrition resistant catalyst is prepared by precipitating a silica alumina hydrogel at high pH, and subsequently reacting the alkaline hydrogel with sufficient acid aluminum salt at a pH below 4 to obtain an acidic hydrogel slurry. The slurry is then processed into a catalyst by spray drying, washing and ion exchanging. The catalyst may include substantial quantities of clay and/or crystalline aluminosilicate zeolites.

Silica-alumina hydrogel catalyst

A process for preparing a synthetic faujasite having a novel platelet-type crystalline shape and a silica to alumina ratio above 2.2 by adding potassium ions to a seeded faujasite synthesis slurry and heating to convert to the synthetic faujasite. The use of the novel zeolite form as a catalyst promoter and an adjuvant for strengthening formed zeolite such as beads, balls, pills and extrudates is also disclosed.

Method of preparing a novel platelet-type crystalline form of synthetic

A process for cracking hydrocarbon feedstocks by contacting such stocks under cracking conditions with a composite catalyst comprising an improved hydrogen exchanged Y-type zeolite component and an amorphous inorganic matrix component. The use of this catalyst yields cracked naphthas of increased olefinic content for the production of lead-free high octane gasoline. Further improvement in the levels of C.sub.3 and C.sub.4 olefins can be realized by incorporating a portion of calcined rare earth exchanged Y-type zeolite into the composite catalyst.

Catalytic cracking with catalyst of improved Y zeolite

An amorphous hydrocarbon cracking catalyst of high activity is prepared by mixing solutions of sodium silicate and sodium aluminate, allowing the gel and age, acidulating said gel to precipitate the excess aluminate and ion exchanging after drying to accomplish removal of the alkali metal.

High activity amorphous silica-alumina catalyst

High purity synthetic zeolites having open frameworks, such as offretite, uncontaminated with detectable traces of other zeolites, can be synthesized by the hydrothermal reaction of a silica source, alumina source, sodium hydroxide and/or potassium hydroxide in the presence of a zeolite nucleation slurry synthesized from a mixture of a silica source, alumina source, sodium hydroxide and/or potassium hydroxide and an organic template agent. The preferred organic template agents are the quaternary compounds wherein the central element is one from Group 5A of the Periodic Table and various conjugated aromatic compounds. The zeolite synthesis mixture itself does not contain any organic ion template agent. With this organic template agent not being required, the nucleation slurry is used to promote crystallization of the synthesis mixture to the open framework type of zeolite.

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Annapolis, MD, United States of America

Edwin W Albers