Stephen Raja Roby

US Patent:

8057558, Nov 15, 2011

Filed:

Dec 23, 2008

Appl. No.:

12/342900

Inventors:

Guangci Zhou - El Cerrito CA, US
Curt Munson - Oakland CA, US
Saleh Elomari - Fairfield CA, US
Stephen H. Roby - Hercules CA, US

Assignee:

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

International Classification:

C10L 1/18

US Classification:

44308, 44388, 44389, 44398

Abstract:

The present invention is generally directed to novel biodiesel fuel compositions having enhanced low-temperature properties. The present invention is additionally directed to methods (i. e. , processes) for making such enhanced biodiesel fuels by improving the low-temperature properties of ester-based biodiesel fuels via in situ enhancement and/or additive enhancement.

US Patent:

8147567, Apr 3, 2012

Filed:

May 2, 2011

Appl. No.:

13/098886

Inventors:

Guangci Zhou - El Cerrito CA, US
Curt Munson - Oakland CA, US
Saleh A. Elomari - Fairfield CA, US
Stephen H. Roby - Hercules CA, US

Assignee:

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

International Classification:

C10L 1/18

US Classification:

44308, 44388, 44398

Abstract:

The present invention is generally directed to novel biodiesel fuel compositions having enhanced low-temperature properties. The present invention is additionally directed to methods (i. e. , processes) for making such enhanced biodiesel fuels by improving the low-temperature properties of ester-based biodiesel fuels via in situ enhancement and/or additive enhancement.

US Patent:

20120283491, Nov 8, 2012

Filed:

May 4, 2011

Appl. No.:

13/100832

Inventors:

Guangci Zhou - El Cerrito CA, US
Stephen Harold Roby - Hercules CA, US
Rebecca Brafman - Concord CA, US

Assignee:

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

International Classification:

C10L 1/04
C07C 1/00

US Classification:

585 14, 585733

Abstract:

A renewable fuel blend and a process for producing a renewable fuel blend are described. The blend includes biologically derived Cto Cnormal paraffins, which are provided to the blend in quantities such that blend does not require a pour point reducing treatment to achieve a low pour point. In embodiments, the normal paraffins are produced in an upgrading process, such as a hydrotreating process.

US Patent:

20140058147, Feb 27, 2014

Filed:

Aug 24, 2012

Appl. No.:

13/594139

Inventors:

Guangci Zhou - El Cerrito CA, US
William James Cannella - Orinda CA, US
Stephen Harold Roby - Hercules CA, US

Assignee:

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

International Classification:

C07C 1/22
C07C 5/13

US Classification:

585253

Abstract:

The present invention is directed to preparing distillate fuel having almost no oxygen and no carbon-to-carbon double bonds. The method comprises passing biodiesel and/or lipids derived from vegetable oils, algae oils, and/or animal fats over bio-feedstock, or lipids, conversion catalyst that performs the hydrocarbon isomerization function, removes oxygen from the feedstock, cracks off the Cbackbone, and saturates double bonds. The process is a single step process eliminating the need of a separate costly hydrotreating step while producing a renewable source distillate fuel.

US Patent:

20140058148, Feb 27, 2014

Filed:

Aug 24, 2012

Appl. No.:

13/594175

Inventors:

Guangci Zhou - El Cerrito CA, US
William James Cannella - Orinda CA, US
Stephen Harold Roby - Hercules CA, US

Assignee:

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

International Classification:

C07C 1/22
C07C 5/13

US Classification:

585253

Abstract:

The present invention is directed to preparing distillate fuel having almost no oxygen and no carbon-to-carbon double bonds. The method comprises passing biodiesel and/or lipids derived from vegetable oils, algae oils, and/or animal fats over a bio-feedstock, or lipids, conversion catalyst that performs the hydrocarbon isomerization function, removes oxygen from the feedstock, cracks off the Cbackbone, and saturates double bonds. The process is a single step process eliminating the need of a separate costly hydrotreating step while producing a renewable source distillate fuel.

US Patent:

20150337087, Nov 26, 2015

Filed:

Aug 5, 2015

Appl. No.:

14/819171

Inventors:

Guangci Zhou - El Cerrito CA, US
Stephen Harold Roby - Hercules CA, US
Christopher W. Kuehler - Larkspur CA, US

Assignee:

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

International Classification:

C08H 8/00

Abstract:

The present disclosure generally relates to removing metals from liquid-phase pyrolysis oil, such as at or near room temperatures. Specifically, some embodiments of the disclosure relate to a method and a system for removing metals from pyrolysis oil using acidic ion-exchange resins. One embodiment relates to a method for removing metals from pyrolysis oil comprising combining pyrolysis oil and an organic solvent to form a pyrolysis oil mixture and removing metal from the pyrolysis oil mixture to produce a reduced metal content pyrolysis oil mixture. In some embodiments, the removing of the metal uses a strongly acid ion-exchange resin.

US Patent:

20150203420, Jul 23, 2015

Filed:

Jan 17, 2014

Appl. No.:

14/158089

Inventors:

Guangci Zhou - El Cerrito CA, US
Stephen H. Roby - Hercules CA, US
Christopher W. Kuehler - Larkspur CA, US

Assignee:

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

International Classification:

C07C 7/12

Abstract:

The present disclosure generally relates to removing metals from liquid-phase pyrolysis oil, such as at or near room temperatures. Specifically, some embodiments of the disclosure relate to a method and a system for removing metals from pyrolysis oil using acidic ion-exchange resins. One embodiment relates to a method for removing metals from pyrolysis oil comprising combining pyrolysis oil and an organic solvent to form a pyrolysis oil mixture and removing metal from the pyrolysis oil mixture to produce a reduced metal content pyrolysis oil mixture. The metal can then be removed by using a strongly acidic ion-exchange resin.