Harris E Kluksdahl

47642670, Aug 16, 1988

Oct 29, 1987

7/115792

Hong C. Chen - San Rafael CA
Cliff M. Detz - San Rafael CA
Larry W. Jossens - Albany CA
Harris E. Kluksdahl - San Rafael CA
Paul W. Tamm - Oakland CA

Chevron Research Company - San Francisco CA

C10G 3506

208 65

A multi-stage catalytic reforming process using a catalyst having a high rhenium to platinum ratio in the first stage or stages and a catalyst having a still higher rhenium to platinum ratio for the last stage. The process comprises: (a) contacting a naphtha feed with a first stage catalyst comprising rhenium and platinum, and having a rhenium to platinum weight ratio of at least 1. 7, under catalytic reforming conditions in one or more first reforming stages of a reforming unit to obtain intermediate reformate; and (b) contacting the intermediate reformate, under catalytic reforming conditions in a last stage of the reforming unit, with a last stage catalyst comprising rhenium and 0. 2 to 2. 0 weight percent platinum, and having sufficient rhenium so that the last stage catalyst has at least 0. 5 weight percent rhenium beyond that necessary to attain a 1.

45885664, May 13, 1986

Jul 23, 1985

6/757875

Harris E. Kluksdahl - San Rafael CA

Chevron Research Company - San Francisco CA

C01D 1502

4231795

This invention relates to the separation of lithium from lithium-containing materials, primarily ores such as hectoritic montmorillonite, having about 0. 02 to 2. 0 percent lithium by weight. The process comprises reducing the particle size of the material to less than about 500 microns; slurrying the particles with an aqueous base consisting of carbonates or hydroxides of sodium or potassium; heating the resulting slurry at about 50. degree. to 125. degree. C. for from about 0. 1 to 6 hr; separating the solids and acidifying the solids with aqueous sulfuric acid to a pH value of about 0 to 2; heating the acidified slurry at about 50. degree. to 125. degree. C. for about 0. 5 to 10 hr; separating the residual solids from the aqueous phase; separating the liquid portion of the cooled slurry, which is treated with sodium hydroxide, potassium hydroxide or calcium hydroxide and then with sodium carbonate or potassium carbonate with heating to remove interfering alkaline earth metals, cooling and separating the aqueous phase followed by treatment with sufficient alkali carbonate to precipitate the lithium carbonate with filtering of the hot slurry to remove the lithium as solid lithium carbonate. Lithium and its compounds have a variety of uses ranging from a component of a lightweight electric storage battery to pharmaceuticals used in the treatment of depression and other diseases.

54395836, Aug 8, 1995

Jan 4, 1993

8/000243

Richard C. Robinson - San Rafael CA
Robert L. Jacobson - Vallejo CA
Harris E. Kluksdahl - San Rafael CA
William A. Blanton - Woodacre CA
Dennis L. Holtermann - Crockett CA
Leslie A. Field - Portola Valley CA

Chevron Research and Technology Company - San Francisco CA

C01G 3506

208 62

A process is disclosed for removing residual sulfur from a hydrotreated naphtha feedstock. The feedstock is contacted with molecular hydrogen under reforming conditions in the presence of a less sulfur sensitive reforming catalyst to convert trace sulfur compounds to H. sub. 2 S, and to form a first effluent. The first effluent is contacted with a solid sulfur sorbent to remove the H. sub. 2 S and form a second effluent. The second effluent is then contacted with a highly selective reforming catalyst under severe reforming conditions. Also disclosed is a method using a potassium containing sulfur sorbent made from nitrogen-free potassium compounds.

41927362, Mar 11, 1980

Nov 29, 1978

5/964766

Harris E. Kluksdahl - San Rafael CA

Chevron Research Company - San Francisco CA

C10G 2916
C10G 2302

208251H

Indigenous metal impurities in an oil are removed by contacting the oil with a novel solid consisting essentially of porous alumina containing a minor amount of phosphorus. The contacting is carried out under oil demetallizing conditions.

42383722, Dec 9, 1980

May 4, 1979

6/036207

Waldeen C. Buss - Richmond CA
Harris E. Kluksdahl - San Rafael CA

Chevron Research Company - San Francisco CA

B01J 2362
B01J 2308
C10G 3506

252466PT

An improved catalyst, having a reduced fouling rate when used in a catalytic reforming process, said catalyst comprising platinum disposed on an alumina support wherein the alumina support is obtained by removing water from aluminum hydroxide produced as a by-product from a Ziegler higher alcohol synthesis reaction, and wherein the alumina is calcined at a temperature of 1100. degree. -1400. degree. F. so as to have a surface area of 165 to 215 square meters per gram.

58499750, Dec 15, 1998

Jan 7, 1997

8/782015

Harris E. Kluksdahl - San Rafael CA
Lawrence W. Jossens - Albany CA
Thomas V. Harris - Benecia CA
Stacey I. Zones - San Francisco CA

Chevron U.S.A. Inc. - San Francisco CA

C07C 527

585671

A process for skeletal isomerization of light normal C. sub. 4-6 olefins to iso-olefins by contacting a hydrocarbon stream containing C. sub. 4-6 normal olefins under isomerization conditions with a SSZ-32 zeolite catalyst.

52667278, Nov 30, 1993

Jul 10, 1992

7/911848

Harris E. Kluksdahl - San Rafael CA
Gary M. H. Lee - Hercules CA

Chevron Research and Technology Company - San Francisco CA

C07C31928

568 60

A process for purifying alkyl sulfides by absorption of the organosulfur impurities on an absorbent. The absorber is a copper salt deposited on a high surface area support. The purified alkyl sulfide is useful as an extractant for palladium.

40123138, Mar 15, 1977

Sep 12, 1975

5/613011

Waldeen C. Buss - Richmond CA
Harris E. Kluksdahl - San Rafael CA

Chevron Research Company - San Francisco CA

C10G 3508

208139

An improved reforming process is obtained using a catalyst containing platinum, rhenium and chloride disposed on a particulate support formed using alumina obtained by removing water from an aluminum hydroxide produced as a by-product of a Ziegler higher-alcohol synthesis, when the catalyst is prepared by calcining the alumina support at a temperature between 1000. degree. -1500. degree. F to provide a support having a surface area between 140-240 m. sup. 2 /g, then impregnating a platinum compound and a rhenium compound into the calcined alumina in the presence of a sufficiently high concentration of chloride to obtain an impregnated composition, which, upon drying, contains at least 1. 4 weight percent total chloride, and finally calcining the impregnated preparation to reduce the total chloride content of the final catalyst to less than 1. 2 weight percent.