Patents by Inventor Chakka Sudhakar

Chakka Sudhakar has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hydrodearomatization of hydrocarbons
    Patent number: 5449452
    Abstract: A naphtha or a middle distillate hydrocarbon is hydrodearomatized by hydrotreating in the presence of a catalyst containing boron, non-noble Group VIII metal, and Group VIB metal on a carbon support.
    Type: Grant
    Filed: September 20, 1993
    Date of Patent: September 12, 1995
    Inventors: Chakka Sudhakar, Frank Dolfinger, Jr., Max R. Cesar, Jeffrey G. Weissman
  • Hydrodearomatization of middle distillate hydrocarbons
    Patent number: 5435907
    Abstract: A naphtha or a middle distillate hydrocarbon is dehydroaromatized by hydrotreating in the presence of a catalyst containing non-noble Group VIII metal and Group VI-B metal on carbon.
    Type: Grant
    Filed: January 31, 1994
    Date of Patent: July 25, 1995
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Frank Dolfinger, Jr., Dennis J. Pao, John Hazen
  • Hydrotreating of cracked naphtha
    Patent number: 5423976
    Abstract: Hydrodesulfurization of cracked naphtha, with minimum attendant hydrogenation of olefins, is effected over a sulfided carbon support catalyst bearing (i) a non-noble Group VIII metal, (ii) a Group VI-B metal, and (iii) a metal of Group IA, II A, III B, or the lanthanide Group of rare earths.
    Type: Grant
    Filed: March 14, 1994
    Date of Patent: June 13, 1995
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Gerald G. Sandford, Phillip L. Dahlstrom, Mahendra S. Patel, Edwin L. Patmore
  • Selective hydrodesulfurization of naphtha using spent resid catalyst
    Patent number: 5423975
    Abstract: Naphtha is selectively hydrodesulfurized using spent resid upgrading catalyst to remove sulfur while minimizing loss in octane level due to olefin saturation.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: June 13, 1995
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Gerald G. Sandford, Ajit K. Bhattacharya
  • Method for selective hydrodenitrogenation of raw oils
    Patent number: 5389241
    Abstract: A method of selectively hydrodenitrogenating various raw hydrocarbon oils such as various petroleum feedstocks, coal liquids, shale oils and sand oils, which method comprises passing the raw hydrocarbon oil along with hydrogen (H.sub.2) over sulfided carbon supported Fe--Mo catalysts, whereby the raw hydrocarbon oil is hydrodenitrogenated with a selectivity significantly higher than that is possible with conventional alumina supported hydrotreating catalysts.
    Type: Grant
    Filed: October 6, 1993
    Date of Patent: February 14, 1995
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Gerald G. Sandford, Frank Dolfinger, Jr.
  • Selective hydrodesulfurization of naphtha using deactivated hydrotreating catalyst
    Patent number: 5286373
    Abstract: Naphtha is selectively hydrodesulfurized using deactivated hydrotreating catalyst to remove sulfur while minimizing loss in octane level due to olefin saturation.
    Type: Grant
    Filed: July 8, 1992
    Date of Patent: February 15, 1994
    Assignee: Texaco Inc.
    Inventors: Chakka Sudhakar, Gerald G. Sandford