Patents by Inventor Krishnan Viswanathan

Krishnan Viswanathan 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: 9222033
    Abstract: A method and system for processing naphtha, including a high shear mechanical device. In one embodiment, the method comprises forming a dispersion of gas in a naphtha hydrocarbon liquid in a high shear device prior to introduction in a cracking reactor/furnace. In another instance the system for processing naphtha comprises a high shear device for mechanically shearing hydrocarbons.
    Type: Grant
    Filed: February 11, 2014
    Date of Patent: December 29, 2015
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Krishnan Viswanathan, Gregory G. Borsinger
  • Patent number: 8821713
    Abstract: A method and system for processing naphtha, including a high shear mechanical device. In one embodiment, the method comprises forming a dispersion of gas in a naphtha hydrocarbon liquid in a high shear device prior to introduction in a cracking reactor/furnace. In another instance the system for processing naphtha comprises a high shear device for mechanically shearing hydrocarbons.
    Type: Grant
    Filed: December 15, 2010
    Date of Patent: September 2, 2014
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Krishnan Viswanathan, Gregory G. Borsinger
  • Patent number: 8759570
    Abstract: A method for halogenating, sulfonating, or sulfo-halogenating a feed comprising paraffin, by subjecting a mixture comprising the feed and a reagent selected from the group consisting of sulfonating agents, halogenating agents, and combinations thereof to a shear rate of at least 20,000 s?1 to produce a high-shear treated product; cooling the high shear-treated product by heat exchange with a heat transfer medium, to produce a cooled product; and separating the high shear-treated product into an offgas and a liquid product comprising at least one selected from the group consisting of sulfonated paraffins, halogenated paraffins, and sulfo-halogenated paraffins. A high shear system for the production of halogenated, sulfonated, or sulfo-halogenated paraffin is also provided.
    Type: Grant
    Filed: March 2, 2011
    Date of Patent: June 24, 2014
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Krishnan Viswanathan, Greg G. Borsinger, Rayford G. Anthony
  • Publication number: 20140161683
    Abstract: A method and system for processing naphtha, including a high shear mechanical device. In one embodiment, the method comprises forming a dispersion of gas in a naphtha hydrocarbon liquid in a high shear device prior to introduction in a cracking reactor/furnace. In another instance the system for processing naphtha comprises a high shear device for mechanically shearing hydrocarbons.
    Type: Application
    Filed: February 11, 2014
    Publication date: June 12, 2014
    Applicant: H R D Corporation
    Inventors: Abbas HASSAN, Aziz Hassan, Krishnan Viswanathan, Gregory G. Borsinger
  • Patent number: 8480961
    Abstract: Herein disclosed is a system for hydrating an alkylene oxide that includes a high shear device configured to form a dispersion of an alkylene oxide and water, the high shear device comprising a rotor, a stator, and a catalytic surface, wherein the dispersion comprises gas bubbles with an average gas bubble diameter of less than about 5 ?m; a pump configured for delivering a liquid stream to the high shear device; and a reactor coupled to the high shear device, and configured to receive the dispersion from the high shear device, wherein the alkylene oxide is hydrated in the reactor.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: July 9, 2013
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Rayford G. Anthony, Krishnan Viswanathan, Gregory G. Borsinger
  • Patent number: 8431752
    Abstract: Herein disclosed is a method of hydrating an alkylene oxide that includes introducing an alkylene oxide into water to form a first stream; flowing the first stream through a high shear device to produce a second stream; and contacting the second stream with a catalyst in a reactor to hydrate the alkylene oxide and form an alkylene glycol.
    Type: Grant
    Filed: September 28, 2012
    Date of Patent: April 30, 2013
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Rayford G. Anthony, Krishnan Viswanathan, Gregory G. Borsinger
  • Patent number: 8304584
    Abstract: Herein disclosed is a method of hydrating an alkylene oxide. In an embodiment, the method comprises (a) introducing an alkylene oxide into water to form a first stream; (b) flowing the first stream through a high shear device to produce a second stream; and (c) contacting the second stream with a catalyst in a reactor to hydrate the alkylene oxide and form an alkylene glycol. In some embodiments, alkylene oxide comprises ethylene oxide, propylene oxide, butylene oxide, or combinations thereof. In some embodiments, producing the second stream comprises an energy expenditure of at least about 1000 W/m3. In some embodiments, the catalyst comprises an amine, an acid catalyst, an organometallic compound, an alkali metal halide, a quaternary ammonium halide, zeolites, or combinations thereof. In some embodiments, the alkylene glycol comprises ethylene glycol.
    Type: Grant
    Filed: March 12, 2010
    Date of Patent: November 6, 2012
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Rayford G. Anthony, Krishnan Viswanathan, Gregory G. Borsinger
  • Publication number: 20120241390
    Abstract: Herein disclosed is a method of removing at least one component from a feed stream, the method including steps of subjecting the feed stream to high shear separation in a high shear device to produce a high shear-treated product stream; and substantially separating the at least one component from the high shear-treated product stream to produce a component-reduced product stream.
    Type: Application
    Filed: March 29, 2012
    Publication date: September 27, 2012
    Applicant: H R D CORPORATION
    Inventors: Abbas Hassan, Aziz Hassan, Krishnan Viswanathan, Gregory G. Borsinger, Rayford G. Anthony
  • Patent number: 8088953
    Abstract: Disclosed herein is a method for cyclohexane oxidation. The method comprises a) forming a dispersion comprising liquid cyclohexane and an oxidant gas utilizing a high shear device, wherein the dispersion comprises oxidant gas bubbles with a mean diameter of less than about 5 ?m, and wherein the high shear device comprises at least one rotor and at least one stator; and b) hydrogenating the dispersion in the presence of a hydrogenation catalyst to form a product comprising cyclohexanol or cyclohexanone. In some embodiments, the oxidant comprises air, oxygen-enriched air, oxygen, or an oxygen-containing gas. In some embodiments, step a) of the method comprises forming the dispersion in the presence of an oxidation catalyst. Also disclosed herein is a system for oxidizing cyclohexane.
    Type: Grant
    Filed: December 1, 2009
    Date of Patent: January 3, 2012
    Assignee: H R D Corporation
    Inventors: Abbas Hassan, Aziz Hassan, Gregory G. Borsinger, Krishnan Viswanathan, Rayford G. Anthony
  • Publication number: 20110315601
    Abstract: A method and system for processing naphtha, including a high shear mechanical device. In one embodiment, the method comprises forming a dispersion of gas in a naphtha hydrocarbon liquid in a high shear device prior to introduction in a cracking reactor/furnace. In another instance the system for processing naphtha comprises a high shear device for mechanically shearing hydrocarbons.
    Type: Application
    Filed: December 15, 2010
    Publication date: December 29, 2011
    Applicant: H R D CORPORATION
    Inventors: Abbas Hassan, Aziz Hassan, Krishnan Viswanathan, Gregory G. Borsinger
  • Publication number: 20110266198
    Abstract: Herein disclosed is a method of removing at least one component from a feed by subjecting the feed to high shear in the presence of carbon dioxide to produce a high shear-treated product and separating the at least one component from the high shear-treated product to produce a component-reduced product. Also disclosed is a method of removing asphaltenes from asphaltenic oil by subjecting the asphaltenic oil to a shear rate of at least 10,000 s?1 in the presence of carbon dioxide to produce a high shear-treated product and separating asphaltenes from the high shear-treated product to produce an asphaltene-reduced product oil. Systems are also provided for carrying out the methods.
    Type: Application
    Filed: October 28, 2010
    Publication date: November 3, 2011
    Applicant: H R D CORPORATION
    Inventors: Abbas Hassan, Aziz Hassan, Krishnan Viswanathan, Gregory G. Borsinger, Rayford G. Anthony
  • Publication number: 20110269989
    Abstract: A method for halogenating, sulfonating, or sulfo-halogenating a feed comprising paraffin, by subjecting a mixture comprising the feed and a reagent selected from the group consisting of sulfonating agents, halogenating agents, and combinations thereof to a shear rate of at least 20,000 s?1 to produce a high-shear treated product; cooling the high shear-treated product by heat exchange with a heat transfer medium, to produce a cooled product; and separating the high shear-treated product into an offgas and a liquid product comprising at least one selected from the group consisting of sulfonated paraffins, halogenated paraffins, and sulfo-halogenated paraffins. A high shear system for the production of halogenated, sulfonated, or sulfo-halogenated paraffin is also provided.
    Type: Application
    Filed: March 2, 2011
    Publication date: November 3, 2011
    Applicant: H R D Corporation
    Inventors: Abbas HASSAN, Krishnan Viswanathan, Rayford G. Anthony, Gregory Borsinger, Aziz Hassan
  • Publication number: 20100222615
    Abstract: Herein disclosed is a method of hydrating an alkylene oxide. In an embodiment, the method comprises (a) introducing an alkylene oxide into water to form a first stream; (b) flowing the first stream through a high shear device to produce a second stream; and (c) contacting the second stream with a catalyst in a reactor to hydrate the alkylene oxide and form an alkylene glycol. In some embodiments, alkylene oxide comprises ethylene oxide, propylene oxide, butylene oxide, or combinations thereof. In some embodiments, producing the second stream comprises an energy expenditure of at least about 1000 W/m3. In some embodiments, the catalyst comprises an amine, an acid catalyst, an organometallic compound, an alkali metal halide, a quaternary ammonium halide, zeolites, or combinations thereof. In some embodiments, the alkylene glycol comprises ethylene glycol.
    Type: Application
    Filed: March 12, 2010
    Publication date: September 2, 2010
    Applicant: H R D CORPORATION
    Inventors: Abbas Hassan, Aziz Hassan, Rayford G. Anthony, Krishnan Viswanathan, Gregory G. Borsinger
  • Publication number: 20100168477
    Abstract: Disclosed herein is a method for cyclohexane oxidation. The method comprises a) forming a dispersion comprising liquid cyclohexane and an oxidant gas utilizing a high shear device, wherein the dispersion comprises oxidant gas bubbles with a mean diameter of less than about 5 ?m, and wherein the high shear device comprises at least one rotor and at least one stator; and b) hydrogenating the dispersion in the presence of a hydrogenation catalyst to form a product comprising cyclohexanol or cyclohexanone. In some embodiments, the oxidant comprises air, oxygen-enriched air, oxygen, or an oxygen-containing gas. In some embodiments, step a) of the method comprises forming the dispersion in the presence of an oxidation catalyst. Also disclosed herein is a system for oxidizing cyclohexane.
    Type: Application
    Filed: December 1, 2009
    Publication date: July 1, 2010
    Applicant: H R D CORPORATION
    Inventors: Abbas Hassan, Aziz Hassan, Gregory G. Borsinger, Krishnan Viswanathan, Rayford G. Anthony
  • Patent number: 7527725
    Abstract: A method is disclosed for upgrading drip oil comprising subjecting the drip oil to multiple distillation steps to form a stream rich in aromatics and a separate stream rich in dicyclopentadiene.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: May 5, 2009
    Assignees: Equistar Chemicals, LP, Lyondell Chemical Technology, L.P.
    Inventors: Krishnan Viswanathan, Lau S. Yang, Ellen S. Lenz, David W. Leyshon
  • Publication number: 20070249886
    Abstract: A method is disclosed for upgrading drip oil comprising subjecting the drip oil to multiple distillation steps to form a stream rich in aromatics and a separate stream rich in dicyclopentadiene.
    Type: Application
    Filed: April 20, 2006
    Publication date: October 25, 2007
    Inventors: Krishnan Viswanathan, Lau Yang, Ellen Lenz, David Leyshon
  • Publication number: 20050277778
    Abstract: A method for recovering a CO2 stream free of highly reactive volatile organic compounds from an ethylene oxide production process that employs a carbonate/bicarbonate mixture to separate CO2 and form a carbonate concentrate that is treated in a carbonate flash unit followed by a CO2 stripper, wherein at least one of 1) an additional flash unit is employed on the carbonate concentrate upstream of the CO2 stripper, and 2) a side draw CO2 stream is taken from the CO2 stripper.
    Type: Application
    Filed: June 10, 2004
    Publication date: December 15, 2005
    Inventors: Krishnan Viswanathan, Solon Williams
  • Patent number: 6927310
    Abstract: A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glycol containing aldehyde, mixing with the thus separated tripropylene that contains aldehyde an aldehyde controlling additive to form a first individual tripropylene glycol product that contains glycol controlling additive and has an aldehyde content below that required for acrylate grade tripropylene glycol, separating from the remainder of the composition a tripropylene glycol concentrate, adding an aldehyde controlling additive to the concentrate, and separating from the concentrate a second individual tripropylene product that has an aldehyde content below that required for acrylate grade tripropylene glycol and is free of aldehyde controlling additive.
    Type: Grant
    Filed: October 15, 2003
    Date of Patent: August 9, 2005
    Assignee: Equistar Chemicals, LP
    Inventor: Krishnan Viswanathan
  • Publication number: 20050085673
    Abstract: A method for forming multiple tripropylene glycol products of acrylate grade comprising forming a composition of dipropylene glycol, tripropylene glycol, tetrapropylene glycol and heavier, and at least one aldehyde, separating from said composition tripropylene glycol containing aldehyde, mixing with the thus separated tripropylene that contains aldehyde an aldehyde controlling additive to form a first individual tripropylene glycol product that contains glycol controlling additive and has an aldehyde content below that required for acrylate grade tripropylene glycol, separating from the remainder of the composition a tripropylene glycol concentrate, adding an aldehyde controlling additive to the concentrate, and separating from the concentrate a second individual tripropylene product that has an aldehyde content below that required for acrylate grade tripropylene glycol and is free of aldehyde controlling additive.
    Type: Application
    Filed: October 15, 2003
    Publication date: April 21, 2005
    Inventor: Krishnan Viswanathan
  • Patent number: 6727389
    Abstract: A method for processing at least one cyclic organo-oxide using a closed loop scrubber/holding tank system that contains at least one amine, and circulating the amine through the closed loop while admitting the cyclic organo-oxide to the closed loop.
    Type: Grant
    Filed: April 16, 2003
    Date of Patent: April 27, 2004
    Assignee: Equistar Chemicals, LP
    Inventor: Krishnan Viswanathan