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Ajoy P Raje

from Owasso, OK
Age ~64

Ajoy Raje Phones & Addresses

  • 8420 N 68Th East Ave, Owasso, OK 74055 (918) 516-2357
  • 2621 Cambridge Ct, Stillwater, OK 74074 (405) 743-8391
  • 2317 Husband St, Stillwater, OK 74075 (405) 743-8391
  • 2205 Prior Rd, Wilmington, DE 19809 (302) 798-5540
  • Lexington, KY
  • Morgantown, WV
  • Tulsa, OK
  • 8420 N 68Th East Ave, Owasso, OK 74055 (405) 743-8391

Work

Position: Executive, Administrative, and Managerial Occupations

Education

Degree: Bachelor's degree or higher

Publications

Us Patents

Fischer-Tropsch Processes And Catalysts Using Aluminum Borate Supports

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US Patent:
6730708, May 4, 2004
Filed:
Jul 3, 2001
Appl. No.:
09/898287
Inventors:
Ajoy P. Raje - Stillwater OK
Joe D. Allison - Ponca City OK
Kevin L. Coy - Ponca City OK
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
C07C 2700
US Classification:
518715, 518700, 518721, 502202, 502207
Abstract:
A process is disclosed for the hydrogenation of carbon monoxide. The process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst system in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream, preferably comprising hydrocarbons. In accordance with this invention the catalyst system used in the process includes at least one catalytic material for Fischer-Tropsch reactions (e. g. , iron, cobalt, nickel and/or ruthenium), preferably comprising cobalt, and a support comprising aluminum borate. The catalyst system can be prepared by impregnating alumina with a boron-containing composition to form an aluminum borate support and applying a Fischer-Tropsch catalytically active material to the aluminum borate to form a supported catalyst system.

Pressure Swing Catalyst Regeneration Procedure For Fischer-Tropsch Catalyst

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US Patent:
6869978, Mar 22, 2005
Filed:
May 16, 2002
Appl. No.:
10/150324
Inventors:
Harold A. Wright - Ponca City OK, US
Ajoy P. Raje - Stillwater OK, US
Rafael L. Espinoza - Ponca City OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
C07C027/00
B01J020/34
US Classification:
518709, 518715, 518721, 502 20, 502 34
Abstract:
A process is disclosed for regenerating a catalyst used in a process for synthesizing hydrocarbons. The synthesis process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. The regeneration process involves contacting a deactivated Fischer-Tropsch catalyst with a regeneration gas under regeneration-promoting conditions that include a pressure lower than the mean Fischer-Tropsch reaction pressure, for a period of time sufficient to reactivate the Fischer-Tropsch catalyst.

Method And Apparatus For The Regeneration Of Hydrocarbon Synthesis Catalysts

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US Patent:
6878655, Apr 12, 2005
Filed:
Sep 20, 2002
Appl. No.:
10/251139
Inventors:
Ajoy P. Raje - Stillwater OK, US
Rafael L. Espinoza - Ponca City OK, US
Jack E. Cnossen - Ponca City OK, US
Sergio R. Mohedas - Ponca City OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
B01J020/34
B01J038/10
C07C027/00
US Classification:
502 53, 518700, 518709
Abstract:
The present invention is generally related towards the regeneration of hydrocarbon synthesis catalysts. In particular, the present invention is directed towards the regeneration of deactivated Fischer-Tropsch type catalysts using a two step process wherein the catalyst is first prepared using a dry gas and then regenerated using a hydrogen rich gas. The regeneration process is carried out at temperatures and pressures that are generally different than the operating temperatures and pressures for a typical hydrocarbon synthesis reaction.

Recycling Light Olefins In Multistage Fischer Tropsch Processes

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US Patent:
6897246, May 24, 2005
Filed:
Nov 12, 2002
Appl. No.:
10/293525
Inventors:
Rafael L. Espinoza - Ponca City OK, US
Ajoy P. Raje - Stillwater OK, US
Doug S. Jack - Ponca City OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
C07C027/00
US Classification:
518705, 518700, 518706, 518707, 518715
Abstract:
A process for reducing C-Colefin formation by recycling them to a Fischer-Tropsch hydrocarbon synthesis process and promoting recycled olefins chain growth comprises contacting a gas feed comprising a mixture of Hand CO with a catalyst in a reactor system at conditions effective to produce a hydrocarbon product stream including C-Colefins, separating a C-Colefins-rich stream from the hydrocarbon product stream to form a light olefin recycle stream and recycling the light olefin recycle stream to the reactor system at a point in the reactor system where the H:CO ratio is low relative to the H:CO ratio in the rest of the reactor system. Depending on whether the initial H:CO ratio is greater or less than the usage ratio of the selected catalyst, the recycled olefins can be returned to the system up- or downstream of the reactor system.

Fischer-Tropsch Catalyst Regeneration

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US Patent:
6949488, Sep 27, 2005
Filed:
Sep 20, 2002
Appl. No.:
10/251928
Inventors:
Barbara A. Belt - Seabrook TX, US
Stephen R. Landis - Katy TX, US
Sergio R. Mohedas - Ponca City OK, US
Ajoy P. Raje - Stillwater OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
B01J020/34
B01J038/10
B01J038/02
US Classification:
502 56, 502 20, 502 53
Abstract:
Methods and apparatus for providing the heat required to maintain the desired temperature for catalyst regeneration. The catalyst is heated by contacting a reactant gas mixture with the catalyst in order to initiate an exothermic reaction and, once the desired temperature is achieved, exposing the catalyst to a regenerating gas. The temperature may also be maintained by heating the reactant gas mixture prior to contacting the catalyst and/or adding a liquid, which may be heated, to the catalyst. For heating a Fischer-Tropsch catalyst for regeneration, the reactant gas preferably contains less than 12 mole percent carbon monoxide and more preferably contains between 1 and 4 mole percent carbon monoxide.

Pressure Swing Catalyst Regeneration Procedure For Fischer-Tropsh Catalyst

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US Patent:
6962947, Nov 8, 2005
Filed:
Jan 13, 2005
Appl. No.:
11/035093
Inventors:
Harold A. Wright - Ponca City OK, US
Ajoy P. Raje - Stillwater OK, US
Rafael L. Espinoza - Ponca City OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
C07C027/00
B01J020/34
US Classification:
518709, 518715, 518716, 518717, 518720, 518721, 502 20, 502 34
Abstract:
A process is disclosed for regenerating a catalyst used in a process for synthesizing hydrocarbons. The synthesis process involves contacting a feed stream comprising hydrogen and carbon monoxide with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream comprising hydrocarbons. The regeneration process involves contacting a deactivated Fischer-Tropsch catalyst with a regeneration gas under regeneration-promoting conditions that include a pressure lower than the mean Fischer-Tropsch reaction pressure, for a period of time sufficient to reactivate the Fischer-Tropsch catalyst.

Slurry Activation Of Fischer-Tropsch Catalyst With Carbon Monoxide Co-Feed

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US Patent:
7001928, Feb 21, 2006
Filed:
Sep 22, 2003
Appl. No.:
10/667637
Inventors:
Ajoy P. Raje - Stillwater OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
C07C 27/00
US Classification:
518709, 518700, 518720
Abstract:
Methods and apparatus for improving the efficiency and effectiveness of in situ reduction of a Fischer-Tropsch catalyst slurry. The preferred embodiments of the present invention are characterized by a system that utilizes a co-feed of carbon monoxide along with the reducing gas into a reduction vessel maintained at an elevated temperature. As the metal oxide reduces to the active Fischer-Tropsch metal, the carbon monoxide acts as a poison to hydrogenolysis and reduces the loss of liquid from the slurry and the production of methane. The carbon monoxide is generally in parts-per-million quantities and will achieve the desired results in quantities less than 5,000 ppm, preferably less than 2,000 ppm.

Method For Improved Fischer-Tropsch Catalyst Stability And Higher Stable Syngas Conversion

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US Patent:
7045554, May 16, 2006
Filed:
Sep 3, 2003
Appl. No.:
10/654087
Inventors:
Ajoy P. Raje - Stillwater OK, US
Rafael Espinoza - Ponca City OK, US
Assignee:
ConocoPhillips Company - Houston TX
International Classification:
C07C 27/00
US Classification:
518709, 518 77, 518715, 518719
Abstract:
The present invention is generally related towards methods for preparing and using a more stable synthesis catalysts. In particular, the present invention is directed towards treating synthesis catalysts with low levels of oxygen to deactivate the smaller more unstable metal crystallites present in the catalyst matrix. The process can be carried out either prior to and/or simultaneously with the synthesis reaction.
Ajoy P Raje from Owasso, OK, age ~64 Get Report