Patents by Inventor Sourav Kumar Sengupta

Sourav Kumar Sengupta 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: 8039677
    Abstract: The present invention provides a fluorinated alkylalkoxylate of Formula (1) Rf—(CH2CF2)n(CH2)m—(CH2CH2O)p—XH??(1) wherein Rf is a linear or branched perfluoroalkyl group of 1 to 6 carbon atoms; n is an integer from 1 to 4; X is O; m is an integer from 1 to 6; and p is an integer from 1 to about 40; and a method of altering the surface behavior of a liquid with the fluorinated alkylalkoxylate of Formula (1).
    Type: Grant
    Filed: April 30, 2009
    Date of Patent: October 18, 2011
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Sheng Peng, Sourav Kumar Sengupta
  • Publication number: 20110054219
    Abstract: Aromatic compounds such as o-xylene are selectively nitrated by nitric acid in the presence of polyphosphoric acid and a large pore, acidic zeolite or a large pore, hydrophobic molecular sieve. This is an environmentally friendly, commercially viable, high conversion process for the selective nitration of aromatic compounds in the para position.
    Type: Application
    Filed: August 27, 2010
    Publication date: March 3, 2011
    Applicant: E. I. DU PONT DE NEMOURS AND COMPANY
    Inventors: David Richard Corbin, Joachim C. Ritter, James A. Schultz, Sourav Kumar Sengupta, Katelyn Rae Walck
  • Patent number: 7070743
    Abstract: Elevated temperature, gas-phase, catalyzed processes for preparing HCN in which induction heating is used as a source of energy, and novel apparatus for carrying out said processes.
    Type: Grant
    Filed: March 14, 2002
    Date of Patent: July 4, 2006
    Assignee: Invista North America S.A R.L.
    Inventors: Benny E. Blackwell, Cynthia K. Fallon, Gregory S. Kirby, Mehrdad Mehdizadeh, Theodore Augur Koch, Carmo Joseph Pereira, Sourav Kumar Sengupta
  • Patent number: 6733692
    Abstract: This invention provides a process for the catalytic partial oxidation of a hydrocarbon feedstock by contacting a feed stream including a hydrocarbon feedstock and an oxygen-containing gas with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream including carbon monoxide and hydrogen. The process of this invention is characterized by using an unsupported porous catalyst containing rhodium, such as rhodium foam.
    Type: Grant
    Filed: April 19, 2001
    Date of Patent: May 11, 2004
    Assignee: ConocoPhillips Company
    Inventors: Hasan Dindi, William H. Manogue, Theodore A. Koch, Sourav Kumar Sengupta
  • Publication number: 20030018088
    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 in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream, preferably comprising hydrocarbons. The catalyst used in the process is in the form of a sponge. The process is preferably adapted to produce hydrocarbons suitable for the production of diesel fuel. The catalyst used in the process includes at least one catalytic metal for Fischer-Tropsch reactions, preferably cobalt. Preferably the catalyst further includes at least one promoter suitable for the Fischer-Tropsch reaction, such as at least one element selected from among Groups 2-15 of the Periodic Table, preferably at lease one of chromium, iron, molybdenum, nickel, palladium, platinum, rhenium, rhodium, ruthenium, and combinations thereof.
    Type: Application
    Filed: February 28, 2002
    Publication date: January 23, 2003
    Applicant: CONOCO INC.
    Inventors: Ajoy P. Raje, Theodore A. Koch, Sourav Kumar Sengupta, Mark Jay Harper, Gloria I. Straguzzi, Hasan Dindi
  • Publication number: 20020013227
    Abstract: This invention provides a process for the catalytic partial oxidation of a hydrocarbon feedstock by contacting a feed stream including a hydrocarbon feedstock and an oxygen-containing gas with a catalyst in a reaction zone maintained at conversion-promoting conditions effective to produce an effluent stream including carbon monoxide and hydrogen. The process of this invention is characterized by using an unsupported porous catalyst containing rhodium, such as rhodium foam.
    Type: Application
    Filed: April 19, 2001
    Publication date: January 31, 2002
    Inventors: Hasan Dindi, William H. Manogue, Theodore A. Koch, Sourav Kumar Sengupta
  • Patent number: 6331624
    Abstract: A process for the production of 6-aminocaproamide comprising reacting 5-cyanovaleramide with hydrogen in the presence of a metal catalyst. The 6-aminocaproamide is useful, for example, in the production of caprolactam and nylon 6.
    Type: Grant
    Filed: April 5, 2000
    Date of Patent: December 18, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Theodore Augur Koch, Alan Martin Allgeier, Mark Jay Harper, Sourav Kumar Sengupta
  • Patent number: 6315972
    Abstract: This invention relates to improvements in processes and catalysts for elevated temperature, gas phase, catalyzed reactions in general; it is particularly illustrated by reference to the manufacture of hydrogen cyanide.
    Type: Grant
    Filed: November 10, 1998
    Date of Patent: November 13, 2001
    Assignee: E.I. du Pont de Nemours and Company
    Inventors: Mehrdad Mehdizadeh, Theodore A. Koch, Karl Robert Krause, Sourav Kumar Sengupta, Benny Earl Blackwell
  • Patent number: 5986126
    Abstract: Process for producing 6-aminocapronitrile and/or hexamethylenediamine by hydroformylating 3-pentenenitrile, isolating a formylvaleronitrile (FVN) mixture from the hydroformylation reaction product, reductively aminating the FVN mixture and isolating the desired product.
    Type: Grant
    Filed: January 25, 1999
    Date of Patent: November 16, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Emilio Enrique Bunel, Theodore Augur Koch, Ronnie Ozer, Shawn Homer Phillips, Sourav Kumar Sengupta
  • Patent number: 5958273
    Abstract: An improved induction heated reactor apparatus involving a reaction zone with inlet and outlet and containing an array of electrically conductive catalyst entities (susceptor entities) comprising pellets, rings, or rods containing a core externally coated with a substantially uniform and complete catalyst metal (e.g., platinum, platinum-iridium alloy, or platinum-rhodium alloy) wrap, coating, or surface impregnated, or containing the catalyst metal as a foam which are inductively heated to produce chemical product from a catalytic reaction. Such an apparatus is particularly useful in the catalytic generation of HCN at elevated temperatures.
    Type: Grant
    Filed: July 3, 1997
    Date of Patent: September 28, 1999
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Theodore A. Koch, Karl Robert Krause, Mehrdad Mehdizadeh, Sourav Kumar Sengupta, Benny Earl Blackwell
  • Patent number: 5900511
    Abstract: A process for continuous hydrogenation of adiponitrile (ADN) to hexamethylene diamine (HMD) and optionally to amninocapronitrile (ACN) involving the catalytic hydrogenation of adiponitrile at relatively low temperature (e.g., 75.degree. C.) and pressure (e.g., 500 psig) using a sponge cobalt catalyst (Raney.RTM. Co) in a reaction medium that is substantially free of caustic. In such a process periodic addition of water controls the production of side reaction products and the periodic addition of ammonium hydroxide rejuvenates the catalyst. Hexamethylene diamine is an important intermediate for the synthesis of polyamides such as Nylon-6,6 and aminocapronitrile is a potential intermediate of Nylon-6.
    Type: Grant
    Filed: March 26, 1998
    Date of Patent: May 4, 1999
    Assignee: E. I. de Pont de Nemours and Company
    Inventors: Sourav Kumar Sengupta, Theodore Augur Koch, Karl Robert Krause
  • Patent number: 5811585
    Abstract: A process for preparing 5-chloro-2,3-dihydro-1H-inden-1-one comprising contacting 3-chloro-1-(chlorphenyl)-1-propanone with a catalyst selected from sulfuric acid and solid acid catalysts.
    Type: Grant
    Filed: June 24, 1997
    Date of Patent: September 22, 1998
    Assignee: E. I. du Pont de Nemours and Company
    Inventors: Donald Joseph Dumas, Sourav Kumar Sengupta, David Richard Corbin