W. R. Grace Co.

Carl V McDaniel

Grant C Edwards

Jean-Pierre Gilson

Nelson S Marans

Joseph T Lundquist, Jr

John Storey Magee, Jr

Philip Kenerick Maher

Adley W Hemphill

Phillip K Maher

Joseph M Pilato

Catalytic cracking catalyst compositions having a high degree of activity and selectivity for the production of high octane gasoline fractions which comprise stabilized crystalline molecular sieve SAPO-37 dispersed in an inorganic oxide matrix. The crystalline structure and activity of the SAPO-37 molecular sieve component is preserved by including a stabilizing amount of the organic template compound used in the manufacture of the molecular sieve within the pore structure thereof until such time as the catalyst is thermally activated during use.

Cracking catalyst

Underground coal is mined by sinking a hole into the coal, passing a coal solvent to the coal, and recovering a coal solution and/or dispersion products from the resulting solution or suspension.

Method for solution mining of complex carbonaceous materials

Silane modified inorganic reaction product compositions, water based systems containing said compositions, drilling fluids containing said compositions and a method of drilling bore holes using said drilling fluids, wherein the silane-modified inorganic compositions comprise an aqueous solution, suspension or dispersion of a reaction product of a hydrous inorganic material selected from silicon oxide, aluminum oxide or mixtures thereof with from about 0.01 moles to about 0.3 moles per mole of oxide of an organo silane represented by the general formula

Viscosifying agent

A zeolite containing hydrocarbon cracking catalyst characterized by exceptionally high catalytic acitivity, superior coke selectivity and relatively low rate earth content. The catalyst is prepared by combining into a suitable matrix a zeolite prepared by a combination of thermal stabilization, de-alumination and rare earth ion exchange.

Hydrocarbon cracking catalyst

Crystalline alluminosilicate zeolites are rapidly and efficiently prepared by seeding an aqueous mixture containing alumina, silica, and alkali metal hydroxide with zeolite seeds, i.e. nucleation centers having an average size below about 0.1 micron.

Preparation of zeolites

An ultra thermal stable zeolite aluminosilicate having a silica to alumina ratio of 2.5 to &lt;3.5 and a process of making this composition characterized by ammonia ion exchange, followed by calcination at from 1000.degree. to 1400.degree.F. The composition is further characterized by sodium content expressed as the oxide of less than 4 percent.

Thermal stable synthetic zeolite

A stable rare earth exchanged zeolite having high catalytic activity and improved coke selectivity is prepared by a series of exchange steps whereby the rare earth is introduced into the zeolite in a multi-step e.g., two step manner. The method comprises exchanging a sodium zeolite to less than 4.0 weight percent Na.sub.2 O, exchanging with rare earth to give an initial rare earth oxide content of 0.3 to 5 weight percent, calcining, and further rare earth exchanging the zeolite to give a final rare earth content of 1.0 to 10 weight percent.

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Laurel, MD, United States of America

Carl V McDaniel