Patents by Inventor Madhav Acharya

Madhav Acharya 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).

  • Patent number: 8263517
    Abstract: Catalysts for dewaxing of hydrocarbon feeds, particularly feeds with elevated sulfur and nitrogen levels, are provided. The dewaxing catalysts include a zeolite with a low silica to alumina ratio combined with a low surface binder, or alternatively the formulated catalyst has a high ratio of zeolite surface area to external surface area.
    Type: Grant
    Filed: December 18, 2008
    Date of Patent: September 11, 2012
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Christine N. Elia, Mohan Kalyanaraman, Lei Zhang, Madhav Acharya, Michael A. Daage, Darden Sinclair, Jocelyn A. Kowalski, Jose G. Santiesteban, Ajit B. Dandekar
  • Patent number: 7731838
    Abstract: The instant invention relates to a process to produce low sulfur diesel products through the hydrodesulfurization of low nitrogen diesel boiling range feedstreams in the presence of solid acidic materials.
    Type: Grant
    Filed: September 11, 2007
    Date of Patent: June 8, 2010
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Jonathan M. McConnachie, Catalina L. Coker, Madhav Acharya
  • Publication number: 20090186754
    Abstract: Catalysts for dewaxing of hydrocarbon feeds, particularly feeds with elevated sulfur and nitrogen levels, are provided. The dewaxing catalysts include a zeolite with a low silica to alumina ratio combined with a low surface binder, or alternatively the formulated catalyst has a high ratio of zeolite surface area to external surface area.
    Type: Application
    Filed: December 18, 2008
    Publication date: July 23, 2009
    Inventors: Christine Elia, Mohan Kalyanaraman, Lei Zhang, Madhav Acharya, Michael A. Daage, Darden Sinclair, Jocelyn A. Kowalski, Jose G. Santiesteban, Ajit B. Dandekar
  • Publication number: 20090065398
    Abstract: The instant invention relates to a process to produce low sulfur diesel products through the hydrodesulfurization of low nitrogen diesel boiling range feedstreams in the presence of solid acidic materials.
    Type: Application
    Filed: September 11, 2007
    Publication date: March 12, 2009
    Inventors: Jonathan M. McConnachie, Catalina L. Coker, Madhav Acharya
  • Patent number: 7357856
    Abstract: A two stage process for selectively hydrodesulfurizing olefinic and sulfur and nitrogen-containing naphtha feedstreams wherein the first stage is a nitrogen removal stage to produce a naphtha feedstream having reduced levels of nitrogen compounds and a second stage wherein the naphtha feedstream having reduced levels of nitrogen compounds is hydrodesulfuried with a catalyst and under conditions selective to remove sulfur with minimum olefin saturation.
    Type: Grant
    Filed: September 9, 2004
    Date of Patent: April 15, 2008
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Peter W. Jacobs, Garland B. Brignac, Thomas R. Halbert, Madhav Acharya, Theresa A. Lelain
  • Patent number: 7288181
    Abstract: The instant invention relates to a process to produce high octane, low sulfur naphtha products through the removal of basic nitrogen-containing compounds with subsequent skeletal isomerization of feed olefins and hydrotreating.
    Type: Grant
    Filed: July 9, 2004
    Date of Patent: October 30, 2007
    Assignee: ExxonMobil Research and Engineering Company
    Inventors: Stuart S. Shih, David L. Stern, Madhav Acharya
  • Patent number: 7166756
    Abstract: The present invention is directed at a process to isomerize C10+ hydrocarbon feedstreams by contacting a C10+ hydrocarbon feedstream with a steamed catalyst.
    Type: Grant
    Filed: November 25, 2003
    Date of Patent: January 23, 2007
    Assignee: Exxonmobil Research and Engineering Company
    Inventors: Madhav Acharya, David L. Stern
  • Publication number: 20050098479
    Abstract: The instant invention relates to a two step process for producing low sulfur olefinic naphtha boiling range product streams through nitrogen removal and selective hydrotreating.
    Type: Application
    Filed: September 9, 2004
    Publication date: May 12, 2005
    Inventors: Peter Jacobs, Garland Brignac, Thomas Halbert, Madhav Acharya, Theresa Lalain
  • Publication number: 20050029162
    Abstract: The instant invention relates to a process to produce high octane, low sulfur naphtha products through the removal of basic nitrogen-containing compounds with subsequent skeletal isomerization of feed olefins and hydrotreating.
    Type: Application
    Filed: July 9, 2004
    Publication date: February 10, 2005
    Inventors: Stuart Shih, David Stern, Madhav Acharya
  • Publication number: 20050032629
    Abstract: The instant invention relates to a catalyst system used in the production of high octane, low sulfur naphtha products through skeletal isomerization of feed olefins and hydrotreating with the optional removal of basic nitrogen-containing compounds.
    Type: Application
    Filed: July 9, 2004
    Publication date: February 10, 2005
    Inventors: Stuart Shih, David Stem, Madhav Acharya, Robert Welch, Gordon Stuntz
  • Publication number: 20050023191
    Abstract: The instant invention relates to a process to produce high octane, low sulfur naphtha products through the simultaneous skeletal isomerization of feed olefins and selective hydrotreating.
    Type: Application
    Filed: July 9, 2004
    Publication date: February 3, 2005
    Inventors: Stuart Shih, Madhav Acharya
  • Publication number: 20040162455
    Abstract: The present invention is directed at a process to isomerize C10+ hydrocarbon feedstreams by contacting a C10+ hydrocarbon feedstream with a steamed catalyst.
    Type: Application
    Filed: November 25, 2003
    Publication date: August 19, 2004
    Applicant: ExxonMobil Research and Engineering Company
    Inventors: Madhav Acharya, David L. Stern
  • Publication number: 20030038058
    Abstract: This is a process for upgrading a petroleum naphtha fraction. The naphtha is subjected to reforming and the reformate is cascaded to a benzene and toluene synthesis zone over a benzene and toluene synthesis catalyst comprising a molecular sieve of low acid activity. The preferred molecular sieve is steamed ZSM-5. The benzene and toluene synthesis zone is operated under conditions compatible with the conditions of the reformer such as temperatures of above about 800° F. (427° C.). In one aspect on the invention, the benzene and toluene synthesis catalyst includes a metal hydrogenation component from group VII(B), specifically rhenium. In one mode of operation, the benzene and toluene synthesis catalyst replaces at least a portion of the catalyst in the reformer. The process produces a product containing an increased proportion of benzene, toluene, and/or xylenes, and a reduced portion of alkylated aromatics, as compared to reformate.
    Type: Application
    Filed: August 2, 2002
    Publication date: February 27, 2003
    Inventors: Madhav Acharya, Jeffrey S. Beck, Robert A. Crane, Arthur W. Chester, Vinaya A. Kapoor, Richard C. Kovacs, David L. Stern
  • Patent number: 6471745
    Abstract: Catalytic membranes comprising highly-dispersed, catalytically-active metals in nanoporous carbon membranes and a novel single-phase process to produce the membranes.
    Type: Grant
    Filed: October 26, 1999
    Date of Patent: October 29, 2002
    Assignee: University of Delaware
    Inventors: Henry C. Foley, Michael Strano, Madhav Acharya, Brenda A. Raich
  • Patent number: 5972079
    Abstract: Carbogenic molecular sieve devices comprising a porous support (e.g., a metal support) having a carbogenic molecular sieve membrane attached to one or more surfaces of the support so that small pores in the membrane are in communication with larger pores in the support and methods of making the devices.
    Type: Grant
    Filed: June 28, 1996
    Date of Patent: October 26, 1999
    Assignee: University of Delaware
    Inventors: Henry C. Foley, Madhav Acharya, Brenda A. Raich