Patents by Inventor Ajay Madhav Madgavkar

Ajay Madhav Madgavkar 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: 9861967
    Abstract: A catalyst for the dehydroaromatization of lower alkanes comprising boron in an amount of less than 1 wt % is supported on an inorganic support. The catalyst is useful in the production of aromatics from lower alkanes.
    Type: Grant
    Filed: December 17, 2013
    Date of Patent: January 9, 2018
    Inventors: Ajay Madhav Madgavkar, Ann Marie Lauritzen
  • Publication number: 20150321182
    Abstract: A catalyst for the dehydroaromatization of lower alkanes comprising boron in an amount of less than 1 wt % is supported on an inorganic support. The catalyst is useful in the production of aromatics from lower alkanes.
    Type: Application
    Filed: December 17, 2013
    Publication date: November 12, 2015
    Inventors: Ajay Madhav MADGAVKAR, Ann Marie LAURITZEN
  • Patent number: 9144790
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehyroaromatization aromatic catalyst which is comprised of about 0.005 to about 0.1 wt % platinum, an amount of gallium which is equal to or greater than the amount of the platinum, from about 10 to about 99.9 wt % of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Grant
    Filed: May 19, 2014
    Date of Patent: September 29, 2015
    Assignee: Shell Oil Company
    Inventors: Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Patent number: 8946107
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehydroaromatization aromatic catalyst which is comprised of 0.005 to 0.1% wt platinum, an amount of iron which is equal to or greater than the amount of the platinum, from 10 to 99.9% wt of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Grant
    Filed: February 10, 2014
    Date of Patent: February 3, 2015
    Assignee: Shell Oil Company
    Inventors: Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Patent number: 8871990
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehyroaromatization aromatic catalyst which is comprised of about 0.005 to about 0.1% wt platinum, an amount of an attenuating metal which is no more than about 0.02% wt less than the amount of platinum, from about 10 to about 99.9% wt of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: October 28, 2014
    Assignee: Shell Oil Company
    Inventors: Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20140315710
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting one or more lower alkanes with a dehyroaromatization aromatic catalyst which is comprised of 0.005 to 0.1% wt platinum, not more than 0.2% wt of an amount of an attenuating metal wherein the amount of platinum is not more than about 0.02% wt more than the amount of the attenuating metal, from about 10 to about 99.9% wt of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Application
    Filed: July 2, 2014
    Publication date: October 23, 2014
    Inventors: Ann Marie LAURITZEN, Ajay Madhav MADGAVKAR
  • Publication number: 20140309469
    Abstract: An integrated process for producing gasoline blending components and aromatic hydrocarbons which comprises: (a) contacting a lower alkane feed with an aromatic hydrocarbon conversion catalyst to produce an aromatic reaction product mixture which is comprised of benzene and/or toluene and/or xylene, C9 aromatic products, C10 aromatic products including naphthalene and, optionally, C11+ aromatic products, (b) separating and recovering the aromatic reaction product mixture, (c) separating and recovering benzene, (d) optionally separating recovering toluene and/or xylene, and (e) separating and recovering the C9 aromatic products and the C10 aromatic products which boil at a lower temperature than naphthalene from the naphthalene and the C10 aromatic reaction products which boil at a higher temperature than naphthalene and any C11+ aromatic products.
    Type: Application
    Filed: May 30, 2014
    Publication date: October 16, 2014
    Applicant: SHELL OIL COMPANY
    Inventors: Yajnanarayana Halmuthur JOIS, Ann Marie LAURITZEN, Ajay Madhav MADGAVKAR
  • Patent number: 8835706
    Abstract: A process for the conversion of mixed lower alkanes into aromatics which comprises first reacting a mixed lower alkane feed comprising at least propane and ethane in the presence of an aromatization catalyst under reaction conditions which maximize the conversion of propane into first stage aromatic reaction products, separating ethane from the first stage aromatic reaction products, reacting ethane in the presence of an aromatization catalyst under reaction conditions which maximize the conversion of ethane into second stage aromatic reaction products, and optionally separating ethane from the second stage aromatic reaction products.
    Type: Grant
    Filed: October 29, 2010
    Date of Patent: September 16, 2014
    Assignee: Shell Oil Company
    Inventors: Mahesh Venkataraman Iyer, Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20140256536
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehyroaromatization aromatic catalyst which is comprised of about 0.005 to about 0.1 wt % platinum, an amount of gallium which is equal to or greater than the amount of the platinum, from about 10 to about 99.9 wt % of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Application
    Filed: May 19, 2014
    Publication date: September 11, 2014
    Applicant: SHELL OIL COMPANY
    Inventors: Ann Marie LAURITZEN, Ajay Madhav MADGAVKAR
  • Patent number: 8809608
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting one or more lower alkanes with a dehydroaromatization aromatic catalyst which is comprised of 0.005 to 0.1% wt platinum, not more than 0.2% wt of an amount of an attenuating metal wherein the amount of platinum is not more than about 0.02% wt more than the amount of the attenuating metal, from about 10 to about 99.9% wt of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Grant
    Filed: October 29, 2009
    Date of Patent: August 19, 2014
    Assignee: Shell Oil Company
    Inventors: Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Patent number: 8779224
    Abstract: An integrated process for producing gasoline blending components and aromatic hydrocarbons which comprises: (a) contacting a lower alkane feed with an aromatic hydrocarbon conversion catalyst to produce an aromatic reaction product mixture which is comprised of benzene and/or toluene and/or xylene, C9 aromatic products, C10 aromatic products including naphthalene and, optionally, C11+ aromatic products, (b) separating and recovering the aromatic reaction product mixture, (c) separating and recovering benzene, (d) optionally separating recovering toluene and/or xylene, and (e) separating and recovering the C9 aromatic products and the C10 aromatic products which boil at a lower temperature than naphthalene from the naphthalene and the C10 aromatic reaction products which boil at a higher temperature than naphthalene and any C11+ aromatic products.
    Type: Grant
    Filed: April 8, 2011
    Date of Patent: July 15, 2014
    Assignee: Shell Oil Company
    Inventors: Yajnanarayana Halmuthur Jois, Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Patent number: 8772563
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehyroaromatization aromatic catalyst which is comprised of about 0.005 to about 0.1 wt % platinum, an amount of gallium which is equal to or greater than the amount of the platinum, from about 10 to about 99.9 wt % of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Grant
    Filed: February 16, 2009
    Date of Patent: July 8, 2014
    Assignee: Shell Oil Company
    Inventors: Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Patent number: 8766026
    Abstract: A process is provided for producing aromatic hydrocarbons which comprises: (a) contacting a lower alkane feed with a solid particulate aromatic hydrocarbon conversion catalyst in a fixed bed reaction zone to produce aromatic hydrocarbons and other products, whereby the catalyst is at least partially deactivated by the formation of undesirable coke deposits, (b) periodically regenerating the catalyst under regeneration conditions, (c) separating aromatic hydrocarbons from the other products and unreacted lower alkanes, and (d) optionally recycling unreacted lower alkanes to the reaction zone wherein the fixed bed reaction zone additionally comprises a volume of a catalytically inactive solid.
    Type: Grant
    Filed: May 11, 2011
    Date of Patent: July 1, 2014
    Assignee: Shell Oil Company
    Inventors: Ye Mon Chen, Mahesh Venkataraman Iyer, Karel Martin Kapoun, Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20140155258
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehydroaromatization aromatic catalyst which is comprised of 0.005 to 0.1% wt platinum, an amount of iron which is equal to or greater than the amount of the platinum, from 10 to 99.9% wt of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Application
    Filed: February 10, 2014
    Publication date: June 5, 2014
    Applicant: SHELL OIL COMPANY
    Inventors: Ann Marie LAURITZEN, Ajay Madhav MADGAVKAR
  • Patent number: 8692043
    Abstract: A process for producing aromatic hydrocarbons which comprises (a) contacting ethane with a dehyroaromatization aromatic catalyst which is comprised of 0.005 to 0.1% wt platinum, an amount of iron which is equal to or greater than the amount of the platinum, from 10 to 99.9% wt of an aluminosilicate, and a binder, and (b) separating methane, hydrogen, and C2-5 hydrocarbons from the reaction products of step (a) to produce aromatic reaction products including benzene.
    Type: Grant
    Filed: February 18, 2009
    Date of Patent: April 8, 2014
    Assignee: Shell Oil Company
    Inventors: Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20130338415
    Abstract: A process comprising: contacting a lower alkane feed comprising propane and ethane with an aromatization catalyst in a first stage under first stage reaction conditions to produce a first stage product stream comprising ethane and aromatics; separating the aromatics from the first stage product stream to form an aromatics product stream and a second stage feed; and contacting the second stage feed with an aromatization catalyst in a second stage under second stage reaction conditions to produce a second stage product stream comprising ethane and aromatics wherein the amount ethane in the first stage product stream is equal to from 80 to 300% of the amount of ethane in the lower alkane feed and the amount of ethane in the second stage product stream is 500 equal to at most 80% of the amount of ethane in the second stage feed is described.
    Type: Application
    Filed: December 5, 2011
    Publication date: December 19, 2013
    Inventors: Mahesh Venkataraman Iyer, Ann Marie Lauritzen, Ajay Madhav Madgavkar, NIck Joseph Vecchio
  • Publication number: 20130131414
    Abstract: A process for the conversion of propane and/or butane into aromatics which comprises first reacting a propane and/or butane feed in the presence of an aromatization catalyst under reaction conditions which maximize the conversion of propane and/or butane into first stage aromatic reaction products, separating ethane produced in the first stage reaction from the first stage aromatic reaction products, reacting ethane in the presence of an aromatization catalyst under reaction conditions which maximize the conversion of ethane into second stage aromatic reaction products, and optionally separating ethane from the second stage aromatic reaction products.
    Type: Application
    Filed: October 29, 2010
    Publication date: May 23, 2013
    Inventors: Mahesh Venkataraman Iyer, Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20120277089
    Abstract: The present invention provides a process for hydrocarbon conversion, especially for producing aromatic hydrocarbons, which comprises: (a) alternately contacting a hydrocarbon feed, especially a lower alkane feed, with a hydrocarbon conversion catalyst, especially an aromatization catalyst, under hydrocarbon conversion, especially aromatization reaction conditions, in a reactor for a short period of time, preferably 30 minutes or less, to produce reaction products and then contacting the catalyst with hydrogen-containing gas at elevated temperature for a short period of time, preferably 10 minutes or less, (b) repeating the cycle of step (a) at least one time, (c) regenerating the catalyst by contacting it with an oxygen-containing gas at elevated temperature and (d) repeating steps (a) through (c) at least one time.
    Type: Application
    Filed: November 4, 2010
    Publication date: November 1, 2012
    Inventors: Mahesh Venkataraman Iyer, Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20120253089
    Abstract: The present invention provides a process for producing aromatic hydrocarbons which comprises: (a) alternately contacting a lower alkane feed with an aromatization catalyst under aromatization reaction conditions in a reactor for a short period of time, preferably 30 minutes or less, to produce aromatic reaction products and then contacting the aromatization catalyst with a hydrogen-containing gas at elevated temperature for a short period of time, preferably 10 minutes or less, (b) repeating the cycle of step (a) at least one time, (c) regenerating the aromatization catalyst by contacting it with an oxygen-containing gas at elevated temperature and (d) repeating steps (a) through (c) at least one time.
    Type: Application
    Filed: October 29, 2010
    Publication date: October 4, 2012
    Inventors: Mahesh Venkataraman Iyer, Ann Marie Lauritzen, Ajay Madhav Madgavkar
  • Publication number: 20120240467
    Abstract: A process for the conversion of mixed lower alkanes into aromatics which comprises first reacting a mixed lower alkane feed comprising at least propane and ethane in the presence of an aromatization catalyst under reaction conditions which maximize the conversion of propane into first stage aromatic reaction products, separating ethane from the first stage aromatic reaction products, reacting ethane in the presence of an aromatization catalyst under reaction conditions which maximize the conversion of ethane into second stage aromatic reaction products, and optionally separating ethane from the second stage aromatic reaction products.
    Type: Application
    Filed: October 29, 2010
    Publication date: September 27, 2012
    Inventors: Mahesh Venkataraman Iyer, Ann Marie Lauritzen, Ajay Madhav Madgavkar