Steven Song

US Patent:

8017095, Sep 13, 2011

Filed:

May 29, 2009

Appl. No.:

12/475209

Inventors:

Abdenour Kemoun - Pleasant Hill CA, US
Steven X. Song - Albany CA, US

Assignee:

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

International Classification:

B01J 8/10
B01J 19/00
B01J 35/02

US Classification:

422606, 422645, 422647, 422648, 422220, 422224, 422257

Abstract:

The present invention provides a novel means to provide more effective mixing of gas and fluids in a height constrained interbed space of a catalytic reactor without increasing pressure drop. In particular, the device improves the effectiveness of an existing mixing volume in mixing the gas phase and liquid phase of two-phase systems. According to the present invention, the mixing device helps create a highly arcuate flow to incoming effluents and a high degree of mixing within a constrained interbed space of a catalytic reactor.

US Patent:

8202498, Jun 19, 2012

Filed:

Jul 19, 2010

Appl. No.:

12/839227

Inventors:

Ralph E. Killen - San Francisco CA, US
Craig Boyak - El Cerrito CA, US
Steven X. Song - Albany CA, US
Abdenour Kemoun - Pleasant Hill CA, US
Steve Souers - Ocean Springs MS, US
Krishniah Parimi - Alamo CA, US
Zackory Akin - Pleasant Hill CA, US

Assignee:

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

International Classification:

B01J 8/00
B01J 8/02

US Classification:

422607, 422606, 422220

Abstract:

Systems and apparatus for mixing, cooling, and distributing multiphase fluid mixtures within a reactor, wherein reactor internal apparatus of the present invention provides not only improved fluid mixing and distribution to each underlying catalyst bed surface, but also offers other advantages including: decreased mixing tray height; easier maintenance, assembly and disassembly; and decreased amounts of fabrication material. In an embodiment, fluid may be evenly distributed to a catalyst bed from a fluid distribution unit comprising a nozzle tray including a plurality of nozzles, wherein the nozzles include at least one liquid inlet disposed tangentially to an inner surface of the nozzle.

US Patent:

8211375, Jul 3, 2012

Filed:

Oct 7, 2009

Appl. No.:

12/575334

Inventors:

Krishniah Parimi - Alamo CA, US
Steven X. Song - Albany CA, US
Ralph E. Killen - San Francisco CA, US
Ronald K. Meeker - Clayton CA, US
Steven A. Souers - Ocean Springs MS, US

Assignee:

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

International Classification:

B01J 8/02
B01J 8/00

US Classification:

422220, 422606, 422607, 422224, 261 96, 261 98, 261 76, 261109, 261111

Abstract:

The invention is a fluid distribution device for coupling with a fluid distribution conduit or chimney for improving the distribution of downwardly flowing poly-phase mixture including at least one gas phase and at least one liquid phase, above at least one catalyst bed of granular solid catalytic material. The fluid distribution device for receiving the liquid and gas phases has one or more openings in the top and/or upper portion of its height through which a gas phase can enter and has a gas conduit that opens to a mixing cavity within the device. The fluid distribution device further comprises one or more lateral openings for liquid ingress. The lateral opening or openings allow the liquid to enter a liquid conduit that opens to the internal mixing cavity. The mixing cavity allows intimate contact between the liquid and gas phases. Therefore the flow distribution device of the invention provides improved tolerance for tray out of levelness.

US Patent:

8372354, Feb 12, 2013

Filed:

Jul 19, 2010

Appl. No.:

12/839222

Inventors:

Ralph E. Killen - San Francisco CA, US
Craig Boyak - El Cerrito CA, US
Steven X. Song - Albany CA, US
Abdenour Kemoun - Pleasant Hill CA, US
Steve Souers - Ocean Springs MS, US
Krishniah Parimi - Alamo CA, US
Zackory Akin - Pleasant Hill CA, US

Assignee:

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

International Classification:

B01L 3/02

US Classification:

422501, 422508, 422520, 422521, 422524, 422606, 422607, 422919, 422922, 422924, 422928, 422929, 422551, 7386332, 73864, 7386401, 7386474, 7386487

Abstract:

Systems and apparatus for mixing, cooling, and distributing multiphase fluid mixtures within a reactor, wherein reactor internal apparatus of the present invention provides not only improved fluid mixing and distribution to each underlying catalyst bed surface, but also offers other advantages including: decreased mixing tray height; easier maintenance, assembly and disassembly; and decreased amounts of fabrication material. In an embodiment, fluid may be evenly distributed to a catalyst bed from a fluid distribution unit comprising a nozzle tray including a plurality of nozzles, wherein the nozzles include at least one liquid inlet disposed tangentially to an inner surface of the nozzle.

US Patent:

8597595, Dec 3, 2013

Filed:

Nov 27, 2012

Appl. No.:

13/686304

Inventors:

Zackory S. Akin - Pleasant Hill CA, US
Craig R. Boyak - El Cerrito CA, US
Abdenour Kemoun - Pleasant Hill CA, US
Ralph Evan Killen - San Francisco CA, US
Krishniah Parimi - Alamo CA, US
Steven Xuqi Song - Albany CA, US
Steven Alden Souers - Ocean Springs MS, US

Assignee:

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

International Classification:

B01L 3/02
B05B 1/14
B05B 7/08

US Classification:

422508, 422501, 422520, 422545, 422546, 422607, 422919, 422924, 7386332, 73864, 7386401, 7386464, 239548, 239549, 239568

Abstract:

Systems and apparatus for mixing, cooling, and distributing multiphase fluid mixtures within a reactor, wherein reactor internal apparatus of the present invention provides not only improved fluid mixing and distribution to each underlying catalyst bed surface, but also offers other advantages including: decreased mixing tray height; easier maintenance, assembly and disassembly; and decreased amounts of fabrication material. In an embodiment, fluid may be evenly distributed to a catalyst bed from a fluid distribution unit comprising a nozzle tray including a plurality of nozzles, wherein the nozzles include at least one liquid inlet disposed tangentially to an inner surface of the nozzle.

US Patent:

8206667, Jun 26, 2012

Filed:

Dec 23, 2008

Appl. No.:

12/342799

Inventors:

Babak Fayyaz Najafi - Richmond CA, US
Charles Leonard Kibby - Benicia CA, US
Steven Xuqi Song - Albany CA, US
Daniel Chinn - Bay Point CA, US

Assignee:

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

International Classification:

B01J 8/00

US Classification:

422626, 422637, 422658, 422239

Abstract:

A fixed bed membrane reactor is disclosed. The reactor has a housing including an inlet for receiving reactants and an outlet for discharging retentate streams of reaction products. The inlet and outlet are in fluid communication with a reaction zone in which the reactants may pass downstream from the inlet to the outlet with the reactants reacting to produce reaction products including water. The reactor further includes a membrane assembly disposed in fluid communication with the reaction zone. The membrane assembly includes at least one porous support with a water permselective membrane affixed thereto. The membrane allows water produced in the reaction zone to be selectively removed from the reaction zone as a permeate stream while allowing retentate reaction products to remain in the reaction zone and be discharged as a retentate stream. Ideally, the membrane assembly locates most of the membrane proximate the downstream portion of the reaction zone where accumulated produced water may be selectively removed from the reaction product as opposed to the upstream portion where relatively little water accumulation has occurred. A method for using the reactor to perform in situ water dehydration of reactions, such as Fischer-Tropsch reaction, is also disclosed.

US Patent:

20120315202, Dec 13, 2012

Filed:

Jun 17, 2011

Appl. No.:

13/162742

Inventors:

Steven X. Song - Alameda CA, US
Donald L. Kuehne - Hercules CA, US
Abdenour Kemoun - Pleasant Hill CA, US
Bruce Reynolds - Martiez CA, US

Assignee:

c/o Chevron Corporation - San Ramon CA

International Classification:

B01J 8/44

US Classification:

422311

Abstract:

An apparatus is disclosed for the hydroconversion of hydrocarbon feedstock with a hydrogen gas at elevated temperature and pressure with the use of a catalyst. The apparatus is a reactor vessel with a grid plate distributor for improved gas liquid distribution. The distributor comprises a grid plate and a bubble cap assembly with a plurality of tubular risers extending through the grid plate. Each tubular riser has an upper section above the grid plate and a lower section below the grid plate, the lower section terminated with an open bottom end for ingress of the hydrogen gas and hydrocarbon feedstock, the upper section having a closed top terminated with a housing cap. Each tubular riser has at least a vertical slot and a least a side hole sufficiently sized such that in operation, the liquid level in the zone below the grid plate is above the vertical slot and below the side hole opening.

US Patent:

20130064740, Mar 14, 2013

Filed:

Oct 30, 2012

Appl. No.:

13/663570

Inventors:

Craig Boyak - El Cerrito CA, US
Abdenour Kemoun - Pleasant Hill CA, US
Ralph Evans Killen - San Francisco CA, US
Krishniah Parimi - Alamo CA, US
Steven Xuqi Song - Albany CA, US

International Classification:

B01F 3/04
B01J 8/04

US Classification:

422600, 2611142, 261113

Abstract:

The present invention is directed to a vortex-type mixing device for a down-flow hydroprocessing reactor. In particular, the device improves the effectiveness of an existing mixing volume in mixing the gas phase and liquid phase of two-phase systems. According to the present invention, the mixing device helps create a highly arcuate flow to incoming effluents and a high degree of mixing within a constrained interbed space of a hydroprocessing reactor.