Clifford J Lowe

US Patent:

7166643, Jan 23, 2007

Filed:

Mar 8, 2004

Appl. No.:

10/794084

Inventors:

Clifford M. Lowe - Moraga CA, US
Daniel Chinn - Concord CA, US

Assignee:

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

International Classification:

C07C 27/00

US Classification:

518726, 518700, 518722, 518709

Abstract:

The invention relates to a process for producing a hydrogen-rich stream from a hydrogen-depleted stream. More particularly, the invention relates to a hydrocarbon synthesis process, by way of example, a Fischer Tropsch process, from which both hydrocarbons and high purity hydrogen are obtained. The process comprises contacting the hydrogen-depleted stream with a reverse-selective membrane to provide a CO-enriched permeate and a hydrogen-containing retentate. The high purity hydrogen is produced from the hydrogen-containing retentate. The high purity hydrogen thus obtained may be used in a process selected from the group consisting of upgrading hydrocarbons produced from the hydrocarbon synthesis process, hydrotreating a natural gas stream, recycling to the hydrocarbon synthesis reaction unit, high purity hydrogen production, catalyst rejuvenation, and combinations thereof.

US Patent:

7405243, Jul 29, 2008

Filed:

May 13, 2004

Appl. No.:

10/844378

Inventors:

Clifford M. Lowe - Moraga CA, US
Daniel Chinn - Concord CA, US
Paul Bryan - Pinole CA, US

Assignee:

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

International Classification:

C07C 27/00

US Classification:

518700, 518709, 518722, 518726

Abstract:

The invention relates to a process for producing a hydrogen-rich stream from a hydrogen-depleted stream. More particularly, the invention relates to a hydrocarbon synthesis process, by way of example, a Fischer Tropsch process, from which both hydrocarbons and high purity hydrogen are obtained. The process comprises contacting the hydrogen-depleted stream with a first reverse-selective membrane and a second reverse-selective membrane to provide a CO-enriched permeate and a hydrogen-containing retentate. The high purity hydrogen is produced from the hydrogen-containing retentate. The high purity hydrogen thus obtained may be used in a process selected from the group consisting of upgrading hydrocarbons produced from the hydrocarbon synthesis process, hydrotreating a natural gas stream, recycling to the hydrocarbon synthesis reaction unit, high purity hydrogen production, catalyst rejuvenation, and combinations thereof.

US Patent:

7745502, Jun 29, 2010

Filed:

Dec 13, 2006

Appl. No.:

11/637802

Inventors:

Clifford M. Lowe - Moraga CA, US
Daniel Chinn - Concord CA, US

Assignee:

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

International Classification:

C07C 27/06
C01B 3/12
C01B 3/16

US Classification:

518709, 423655, 423656, 518722, 518726

Abstract:

The invention relates to a process for producing a hydrogen-rich stream from a hydrogen-depleted stream. More particularly, the invention relates to a hydrocarbon synthesis process, by way of example, a Fischer Tropsch process, from which both hydrocarbons and high purity hydrogen are obtained. The process comprises contacting the hydrogen-depleted stream with a reverse-selective membrane to provide a CO-enriched permeate and a hydrogen-containing retentate. The high purity hydrogen is produced from the hydrogen-containing retentate. The high purity hydrogen thus obtained may be used in a process selected from the group consisting of upgrading hydrocarbons produced from the hydrocarbon synthesis process, hydrotreating a natural gas stream, recycling to the hydrocarbon synthesis reaction unit, high purity hydrogen production, catalyst rejuvenation, and combinations thereof.

US Patent:

20130025866, Jan 31, 2013

Filed:

Jul 25, 2011

Appl. No.:

13/190245

Inventors:

Clifford Michael Lowe - Moraga CA, US

Assignee:

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

International Classification:

E21B 43/16

US Classification:

1663051, 166 901

Abstract:

Disclosed is an integrated enhanced oil recovery process and system for use in recovering relatively light oil from an oil-producing reservoir utilizing the injection of nitrogen produced by air separation in a cryogenic air separation unit and/or carbon dioxide produced by combustion in an oxygen fired steam generator fed by oxygen from the air separation unit. The steam produced may be utilized for suitable uses other than injection into an oil-producing reservoir, including heat generation and driving steam turbines, which in turn drive rotary equipment such as electrical generators, pumps and compressors.

US Patent:

20150025284, Jan 22, 2015

Filed:

Jul 17, 2013

Appl. No.:

13/944476

Inventors:

Clifford Michael Lowe - Moraga CA, US
Robert Fletcher Cleverdon - Walnut Creek CA, US

Assignee:

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

International Classification:

C07C 7/12
C07C 2/56

US Classification:

585324, 585824

Abstract:

Processes for eliminating water and oxygenates from a light hydrocarbon processing system, wherein oxygenates are removed from a light hydrocarbon stream by adsorption of the oxygenates on a primary oxygenate adsorption unit to provide a deoxygenated hydrocarbon stream, the primary oxygenate adsorption unit is regenerated via a first regenerant stream to provide an oxygenated first regenerant stream, the oxygenated first regenerant stream is deoxygenated via a secondary oxygenate adsorption unit, and the secondary oxygenate adsorption unit is regenerated via a second regenerant stream to provide an oxygenated second regenerant stream for permanent removal from the system.

US Patent:

20150025285, Jan 22, 2015

Filed:

Jul 17, 2013

Appl. No.:

13/944560

Inventors:

Robert Fletcher Cleverdon - Walnut Creek CA, US
Clifford Michael Lowe - Moraga CA, US
Hye Kyung Cho Timken - Albany CA, US

Assignee:

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

International Classification:

C07C 7/13
C07C 2/58

US Classification:

585331, 585733

Abstract:

Processes for eliminating oxygenates and water from a light hydrocarbon processing system, wherein oxygenates are removed from a light hydrocarbon stream by adsorption of the oxygenates on an oxygenate adsorption unit to provide a deoxygenated hydrocarbon stream, the oxygenate adsorption unit is regenerated via a regenerant stream to provide an oxygenated regenerant stream comprising the oxygenates, and the oxygenated regenerant stream is subjected to hydro-deoxygenation to convert the oxygenates into paraffins and water, wherein the water may also be permanently removed from the system.