Patents by Inventor Devinder Mahajan

Devinder Mahajan 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).

  • Publication number: 20200377382
    Abstract: A method for treating wastewater, comprising: (i) injecting a hydrate-forming gas (e.g., propane) into the wastewater under conditions of elevated pressure and reduced temperature to form a solid hydrate composed of the hydrate-forming gas and water from the wastewater; and (ii) separating the solid hydrate from the wastewater to result in removal of water from the wastewater, thereby resulting in partially dewatered wastewater, and optionally, (iii) lowering the pressure and/or raising the temperature of the solid hydrate to decompose the solid hydrate into reformed hydrate-forming gas and reformed water, and further optionally, recycling the reformed hydrate-forming gas for use in step (i) and/or capturing the reformed water from step (iii) and further decontaminating until suitable for release into waterway or for use in a process. The invention is also directed to an apparatus for practicing the method described above.
    Type: Application
    Filed: June 2, 2020
    Publication date: December 3, 2020
    Applicant: THE RESEARCH FOUNDATION FOR THE STATE UNIVERSITY OF NEW YORK
    Inventor: Devinder Mahajan
  • Publication number: 20190039020
    Abstract: Provided is a method for removing hydrogen sulfide from a gas stream. The method includes contacting the gas stream with a reactor that is configured to remove the hydrogen sulfide. The reactor includes at least one nano-sized metal.
    Type: Application
    Filed: February 13, 2017
    Publication date: February 7, 2019
    Inventors: Devinder MAHAJAN, Saurabh U. PATEL
  • Patent number: 9862665
    Abstract: Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The membranes also include zeolites in the barrier layer. The membranes may, in embodiments, also include a substrate.
    Type: Grant
    Filed: December 1, 2014
    Date of Patent: January 9, 2018
    Assignee: The Research Foundation for the State University of New York
    Inventors: Benjamin Chu, Benjamin S. Hsiao, Devinder Mahajan, Tsung-Ming Yeh
  • Patent number: 9353037
    Abstract: Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The barrier layer includes a graphene oxide. The membranes may, in embodiments, also include a substrate.
    Type: Grant
    Filed: November 19, 2013
    Date of Patent: May 31, 2016
    Assignee: The Research Foundation For The State University of New York
    Inventors: Benjamin Chu, Benjamin S. Hsiao, Devinder Mahajan, Tsung-Ming Yeh
  • Publication number: 20150141711
    Abstract: Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The barrier layer includes a graphene oxide. The membranes may, in embodiments, also include a substrate.
    Type: Application
    Filed: November 19, 2013
    Publication date: May 21, 2015
    Inventors: Benjamin Chu, Benjamin S. Hsiao, Devinder Mahajan, Tsung-Ming Yeh
  • Publication number: 20150080616
    Abstract: Membranes are provided for energy efficient purification of alcohol by pervaporation. Such membranes include a nanofibrous scaffold in combination with a barrier layer. The membranes also include zeolites in the barrier layer. The membranes may, in embodiments, also include a substrate.
    Type: Application
    Filed: December 1, 2014
    Publication date: March 19, 2015
    Inventors: Benjamin Chu, Benjamin S. Hsiao, Devinder Mahajan, Tsung-Ming Yeh
  • Patent number: 8828124
    Abstract: A biogas purification method includes injecting biogas into a pressure vessel, cooling the pressure vessel to a first predetermined temperature and pressurizing the pressure vessel to a predetermined pressure. The method further includes visually monitoring separation of a biogas impurity from a product gas during an induction period, isolating the product gas from the biogas impurity at a clathrate formation equilibrium by removing the product gas from the pressure vessel and passing the product gas through water to yield a purified gas.
    Type: Grant
    Filed: December 5, 2011
    Date of Patent: September 9, 2014
    Assignee: The Research Foundation of State University of New York
    Inventor: Devinder Mahajan
  • Publication number: 20120186822
    Abstract: A modular pressure management oil spill containment system is constructed on the floor of an ocean to contain an oil spill caused by a wild well blowout. A base containment module including a hollow wall and at least one pressure relief valve is submerged below a surface of the ocean, positioned on a portion of the ocean floor that circumvents the wild well and its hollow wall is reinforced. At least one additional containment module including a hollow wall and at least one pressure relief valve is submerged below the ocean surface, positioned on top of the base containment module and its hollow wall is also reinforced. A plurality of riser assemblies are connected between at least a portion of the pressure relief valves of the containment modules and at least one containment vessel. The pressure relief valves are controlled to manage the containment of the oil spill.
    Type: Application
    Filed: January 20, 2011
    Publication date: July 26, 2012
    Applicants: Research Foundation of State University of New York, SUBSEA IP HOLDINGS LLC
    Inventors: Devinder Mahajan, Miriam Rafailovich, Scott Wolinsky
  • Patent number: 6921733
    Abstract: The invention provides a homogenous catalyst for the production of methanol from purified synthesis gas at low temperature and low pressure which includes a transition metal capable of forming transition metal complexes with coordinating ligands and an alkoxide, the catalyst dissolved in a methanol solvent system, provided the transition metal complex is not transition metal carbonyl. The coordinating ligands can be selected from the group consisting of N-donor ligands, P-donor ligands, O-donor ligands, C-donor ligands, halogens and mixtures thereof.
    Type: Grant
    Filed: January 16, 2002
    Date of Patent: July 26, 2005
    Assignee: Brookhaven Science Associates, LLC
    Inventor: Devinder Mahajan
  • Patent number: 6835303
    Abstract: The sulfur content of a liquid hydrocarbon stream is reduced under mild conditions by contracting a sulfur-containing liquid hydrocarbon stream with transition metal particles containing the transition metal in a zero oxidation state under conditions sufficient to provide a hydrocarbon product having a reduced sulfur content and metal sulfide particles. The transition metal particles can be produced in situ by adding a transition metal precursor, e.g., a transition metal carbonyl compound, to the sulfur-containing liquid feed stream and sonicating the feed steam/transition metal precursor combination under conditions sufficient to produce the transition metal particles.
    Type: Grant
    Filed: September 21, 2001
    Date of Patent: December 28, 2004
    Assignee: Brookhaven Science Associates, LLC
    Inventor: Devinder Mahajan
  • Patent number: 6753353
    Abstract: A method for production of mixed alcohols by using a sulfided transition metal catalyst selected from Group VI metals; nano-sizing the metal catalyst during its synthesis; suspending the catalyst in solvents to form a slurry; adding, a sulfur containing material to extend catalyst life; and contacting this slurry with carbon monoxide and hydrogen at 200-325° C. and 500-3000 psig pressure.
    Type: Grant
    Filed: June 18, 2001
    Date of Patent: June 22, 2004
    Assignee: PowerEnerCat, Inc.
    Inventors: Gene R. Jackson, Devinder Mahajan
  • Publication number: 20040022716
    Abstract: The invention provides a process for the catalytic production of a hydrogen feed by exposing a hydrogen feed to a catalyst which promotes a base-catalyzed water-gas-shift reaction in a liquid phase. The hydrogen feed can be provided by any process known in the art of making hydrogen gas. It is preferably provided by a process that can produce a hydrogen feed for use in proton exchange membrane fuel cells. The step of exposing the hydrogen feed takes place preferably from about 80° C. to about 150° C.
    Type: Application
    Filed: December 26, 2002
    Publication date: February 5, 2004
    Applicant: Brookhaven Science Associates LLC
    Inventor: Devinder Mahajan
  • Publication number: 20030185749
    Abstract: The invention provides a process for the catalytic production of a hydrogen feed by exposing a hydrogen feed to a catalyst which promotes a base-catalyzed water-gas-shift reaction in a liquid phase. The hydrogen feed can be provided by any process known in the art of making hydrogen gas. It is preferably provided by a process that can produce a hydrogen feed for use in proton exchange membrane fuel cells. The step of exposing the hydrogen feed takes place preferably from about 80° C. to about 150° C.
    Type: Application
    Filed: April 28, 2003
    Publication date: October 2, 2003
    Applicant: Brookhaven Science Associates LLC
    Inventor: Devinder Mahajan
  • Publication number: 20030158270
    Abstract: The invention provides a homogenous catalyst for the production of methanol from purified synthesis gas at low temperature and low pressure which includes a transition metal capable of forming transition metal complexes with coordinating ligands and an alkoxide, the catalyst dissolved in a methanol solvent system, provided the transition metal complex is not transition metal carbonyl. The coordinating ligands can be selected from the group consisting of N-donor ligands, P-donor ligands, O-donor ligands, C-donor ligands, halogens and mixtures thereof.
    Type: Application
    Filed: January 16, 2002
    Publication date: August 21, 2003
    Inventor: Devinder Mahajan
  • Patent number: 6596423
    Abstract: The invention provides a process for the catalytic production of a hydrogen feed by exposing a hydrogen feed to a catalyst which promotes a base-catalyzed water-gas-shift reaction in a liquid phase. The hydrogen feed can be provided by any process known in the art of making hydrogen gas. It is preferably provided by a process that can produce a hydrogen feed for use in proton exchange membrane fuel cells. The step of exposing the hydrogen feed takes place preferably from about 80° C. to about 150° C.
    Type: Grant
    Filed: March 26, 2001
    Date of Patent: July 22, 2003
    Assignee: Brookhaven Science Associates, LLC
    Inventor: Devinder Mahajan
  • Publication number: 20030102255
    Abstract: The sulfur content of a liquid hydrocarbon stream is reduced under mild conditions by contracting a sulfur-containing liquid hydrocarbon stream with transition metal particles containing the transition metal in a zero oxidation state under conditions sufficient to provide a hydrocarbon product having a reduced sulfur content and metal sulfide particles. The transition metal particles can be produced in situ by adding a transition metal precursor, e.g., a transition metal carbonyl compound, to the sulfur-containing liquid feed stream and sonicating the feed steam/transition metal precursor combination under conditions sufficient to produce the transition metal particles.
    Type: Application
    Filed: September 21, 2001
    Publication date: June 5, 2003
    Inventor: Devinder Mahajan
  • Publication number: 20020197205
    Abstract: The invention provides a process for the catalytic production of a hydrogen feed by exposing a hydrogen feed to a catalyst which promotes a base-catalyzed water-gas-shift reaction in a liquid phase. The hydrogen feed can be provided by any process known in the art of making hydrogen gas. It is preferably provided by a process that can produce a hydrogen feed for use in proton exchange membrane fuel cells. The step of exposing the hydrogen feed takes place preferably from about 80° C. to about 150° C.
    Type: Application
    Filed: March 26, 2001
    Publication date: December 26, 2002
    Inventor: Devinder Mahajan
  • Publication number: 20020077374
    Abstract: A method for production of mixed alcohols by using a sulfided transition metal catalyst selected from Group VI metals; nano-sizing the metal catalyst during its synthesis; suspending the catalyst in solvents to form a slurry; adding, a sulfur containing material to extend catalyst life; and contacting this slurry with carbon monoxide and hydrogen at 200-325° C. and 500-3000 psig pressure.
    Type: Application
    Filed: June 18, 2001
    Publication date: June 20, 2002
    Inventors: Gene R. Jackson, Devinder Mahajan
  • Patent number: 6248796
    Abstract: A method for production of mixed alcohols by using a sulfided transition metal catalyst selected from Group VI metals; nano-sizing the metal catalyst during its synthesis; suspending the catalyst in solvents to form a slurry; adding, a sulfur containing material to extend catalyst life; and contacting this slurry with carbon monoxide and hydrogen at 200-325° C. and 500-3000 psig pressure.
    Type: Grant
    Filed: November 13, 1999
    Date of Patent: June 19, 2001
    Assignee: PowerEnerCat. Inc.
    Inventors: Gene R. Jackson, Devinder Mahajan
  • Patent number: 4992480
    Abstract: There is disclosed synthesis of CH.sub.3 OH from carbon monoxide and hydrogen using an extremely active homogeneous catalyst for methanol synthesis directly from synthesis gas. The catalyst operates preferably between 100.degree.-150.degree. C. and preferably at 100-150 psia synthesis gas to produce methanol. Use can be made of syngas mixtures which contain considerable quantities of other gases, such as nitrogen, methane or excess hydrogen. The catalyst is composed of two components: (a) a transition metal carbonyl complex and (b) an alkoxide component. In the simplest formulation, component (a) is a complex of nickel tetracarbonyl and component (b) is methoxide (CH.sub.3 O.sup.-), both being dissolved in a methanol solvent system. The presence of a co-solvent such as p-dioxane, THF, polyalcohols, ethers, hydrocarbons, and crown ethers accelerates the methanol synthesis reaction.
    Type: Grant
    Filed: March 29, 1990
    Date of Patent: February 12, 1991
    Assignee: Associated Universities, Inc.
    Inventors: Devinder Mahajan, Richard S. Sapienza, William A. Slegeir, Thomas E. O'Hare