Patents by Inventor Rajiv Ratna Singh

Rajiv Ratna Singh 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).

  • Compositions and methods for refrigeration
    Patent number: 8974688
    Abstract: Heat transfer systems, methods and compositions which utilize a heat transfer fluid comprising: (a) from about 30% to about 65% by weight of HFC-134a; (b) from about 0% to about 70% by weight of HFO1234ze; and (c) from about 0% to about 70% by weight of HFO-1234yf, provided that the amount of HFO-1234ze and HFO-1234yf in the composition together is at least about 35% by weight, with the weight percent being based on the total of the components (a)-(c) in the composition.
    Type: Grant
    Filed: May 7, 2010
    Date of Patent: March 10, 2015
    Assignee: Honeywell International Inc.
    Inventors: Samuel F. Yana Motta, Mark W. Spatz, Rajiv Ratna Singh, Robert Gerard Richard, Elizabet del Carmen Vera Becerra, Daniel Burger
  • AZEOTROPE-LIKE COMPOSITIONS OF CIS-1,1,1,4,4,4-HEXAFLUORO-2-BUTENE
    Publication number: 20150018429
    Abstract: This invention relates to azeotrope-like compositions, methods and systems having utility in numerous applications, and in particular, uses for azeotrope-like compositions comprising effective amounts of the compound cis-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzzm), which has the following structure: and another material selected from the group consisting of water, fluoroketones, alcohols, hydrochlorofluoroolefins, and combinations of two or more thereof. These compositions may be used in a wide variety of applications such as, blowing agents, refrigerants, heating agents, power cycle agents, cleaning agents, aerosol propellants, sterilization agents, lubricants, flavor and fragrance extractants, flammability reducing agents, and flame suppression agents.
    Type: Application
    Filed: September 30, 2014
    Publication date: January 15, 2015
    Inventors: Ryan Hulse, Rajiv Ratna Singh, Martin R. Paonessa, Martin Cheney, Hang T. Pham, Mary Bogdan, Cliff Gittere
  • Compositions and Use of Vinylidene Fluoride and Blends Thereof
    Publication number: 20140360209
    Abstract: The present technology relates to compositional blends that can be used as refrigerants, and more specifically to blends of vinylidene fluoride and at least one other component for use in very low temperature applications. In at least some examples, the second component can be selected from the group consisting of carbon dioxide and pentafluoroethane. Further, the compositions can be azeotropic or azeotrope-like.
    Type: Application
    Filed: August 27, 2014
    Publication date: December 11, 2014
    Inventors: Rajiv Ratna Singh, Ryan Hulse
  • Process for the production of 1,3,3,3-tetrafluoropropene
    Patent number: 8889924
    Abstract: The present invention provides a simple three step process for the production of 1,3,3,3-tetrafluoropropene (HFO-1234ze). In the first step, carbon tetrachloride is added to vinyl fluoride to afford the compound CCl3CH2CHClF (HCFC-241fb). HCFC-241fb is then fluorinated with anhydrous HF to afford CF3CH2CHClF (HCFC-244fa) in the second step. Dehydrochlorination of HCFC-244fa, in the third step, affords the desired product, CF3CH?CHF (HFO-1234ze). Following similar chemistry, vinyl chloride may be used in place of vinyl fluoride.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: November 18, 2014
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Rajiv Ratna Singh, Andrew Joseph Poss, David Nalewajek
  • Compositions and use of vinylidene fluoride and blends thereof
    Patent number: 8845922
    Abstract: The present technology relates to compositional blends that can be used as refrigerants, and more specifically to blends of vinylidene fluoride and at least one other component for use in very low temperature applications. In at least some examples, the second component can be selected from the group consisting of carbon dioxide and pentafluoroethane. Further, the compositions can be azeotropic or azeotrope-like.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: September 30, 2014
    Assignee: Honeywell International Inc.
    Inventors: Rajiv Ratna Singh, Ryan Hulse
  • Azeotrope-like compositions of cis-1,1,1,4,4,4-hexafluoro-2-butene
    Patent number: 8846754
    Abstract: This invention relates to azeotrope-like compositions, methods and systems having utility in numerous applications, and in particular, uses for azeotrope-like compositions comprising effective amounts of the compound cis-1,1,1,4,4,4-hexafluoro-2-butene (Z-HFO-1336mzzm), which has the following structure: and another material selected from the group consisting of water, fluoroketones, alcohols, hydrochlorofluoroolefins, and combinations of two or more thereof. These compositions may be used in a wide variety of applications such as, blowing agents, refrigerants, heating agents, power cycle agents, cleaning agents, aerosol propellants, sterilization agents, lubricants, flavor and fragrance extractants, flammability reducing agents, and flame suppression agents.
    Type: Grant
    Filed: December 14, 2010
    Date of Patent: September 30, 2014
    Assignee: Honeywell International Inc.
    Inventors: Ryan Hulse, Rajiv Ratna Singh, Martin R. Paonessa, Hang T. Pham, Mary Bogdan, Cliff Gittere, Linda L. Cheney
  • Process for making 1,3,3,3-tetrafluoropropene
    Patent number: 8829254
    Abstract: The present invention describes a process for making CF3CH?CHF (HFO-1234ze). The process involves the addition of carbon tetrachloride (CCl4) to 1,2-dichloroethylene to form CCl3CHClCHCl2. The compound CCl3CHClCHCl2 thus can then either be treated with HF to produce CF3CHClCHClF as the main product, or it can be converted to CCl2?CHCHCl2 (1230za) by dechlorination. CCl2?CHCHCl2 can be treated with HF such that the main product obtained is CF3CHClCHClF. CF3CH?CHCl may be produced as a by-product, but upon treatment with HF, it affords the compound CF3CHClCHClF. The desired compound, CF3CH?CHF (HFO-1234ze), is obtained as a trans/cis mixture by dehydrochlorination of CF3CH2CHClF or by dechlorination of CF3CHClCHClF.
    Type: Grant
    Filed: February 4, 2013
    Date of Patent: September 9, 2014
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Rajiv Ratna Singh, David Nalewajek, Andrew Joseph Poss
  • Azeotrope-like compositions of pentafluoroethane and trifluoroiodomethane
    Patent number: 8809254
    Abstract: Provided are azeotrope-like compositions comprising heptafluoropropane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agents, fire suppressant compositions, and aerosol propellants.
    Type: Grant
    Filed: October 28, 2013
    Date of Patent: August 19, 2014
    Assignee: Honeywell International Inc.
    Inventors: Rajiv Ratna Singh, Hang T. Pham, Robert G. Richard
  • Process for preparing 1,1,2-Trichloro-3,3,3-trifluoropropane
    Patent number: 8754273
    Abstract: Disclosed is a process for making the compound 1,1,2-trichloro-3,3,3-trifluoropropane (233da) by the catalytic fluorination of 1,1,1,2,3,3-hexachloropropane. 233da is a starting material used in the production cis-1-chloro-3,3,3-trifluoropropene (cis-1233zd).
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: June 17, 2014
    Assignee: Honeywell International Inc.
    Inventors: Yian Zhai, Andrew Joseph Poss, Rajiv Ratna Singh
  • Process for cis-1-chloro-3,3,3-trifluoropropene
    Patent number: 8754272
    Abstract: Disclosed is a process for the preparation of cis-1-chloro-3,3,3-trifluoropropene (cis-1233zd) comprising the steps of (a) providing CF3CHClCHCl2 (233da), and (b) treating the 233da with a dechlorinating agent to produce a mixture of compounds including cis-1-chloro-3,3,3-trifluoropropene, preferably wherein the amount of the cis-isomer generated in the reaction is not less than 30%.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: June 17, 2014
    Assignee: Honeywell International Inc.
    Inventors: Yian Zhai, Andrew Joseph Poss, Michael Van Der Puy, Rajiv Ratna Singh
  • Azeotrope-Like Compositions of Pentafluoroethane and Trifluoroiodomethane
    Publication number: 20140048737
    Abstract: Provided are azeotrope-like compositions comprising heptafluoropropane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agents, fire suppressant compositions, and aerosol propellants.
    Type: Application
    Filed: October 28, 2013
    Publication date: February 20, 2014
    Applicant: Honeywell International Inc.
    Inventors: Rajiv Ratna Singh, Hang T. Pham, Robert G. Richard
  • Process for making cis-1-chloro-3,3,3-trifluoropropene
    Patent number: 8653310
    Abstract: Disclosed is a process for making cis-1-chloro-3,3,3-trifluoropropene comprising reacting 3,3,3-trifluoropropyne with HCl in a reaction vessel at a yield of at least about 80%.
    Type: Grant
    Filed: November 12, 2012
    Date of Patent: February 18, 2014
    Assignee: Honeywell International Inc.
    Inventors: Yian Zhai, Andrew Joseph Poss, Rajiv Ratna Singh
  • Use of low global warming potential (LGWP) solvents for finger print development applications
    Patent number: 8652244
    Abstract: Developing compositions are provided herein for use in producing a visibly detectable image of a latent physiological biometric. The developing compositions include a carrier solvent that includes at least one C3-C4 hydrofluorocarbon olefin or at least one hydrochlorofluorocarbon olefin.
    Type: Grant
    Filed: April 1, 2011
    Date of Patent: February 18, 2014
    Assignee: Honeywell International Inc.
    Inventors: David Nalewajek, Andrew Joseph Poss, Rajiv Ratna Singh, Cheryl Cantlon
  • Solvent compositions containing chlorofluoroolefins or fluoroolefins
    Patent number: 8618040
    Abstract: Compositions and methods based on the use of fluoroalkene containing from 3 to 4 carbon atoms and at least one carbon-carbon double bond, such as HFO-1214, HFO-HFO-1233, or HFO-1354, having properties highly beneficial in foaming and blowing agent applications, articles and methods.
    Type: Grant
    Filed: July 7, 2011
    Date of Patent: December 31, 2013
    Assignee: Honeywell International Inc.
    Inventors: Robert C. Johnson, Hsueh Sung Tung, Rajiv Ratna Singh, Ian Shankland
  • Process for the purification of hydrofluoroolefins
    Patent number: 8609909
    Abstract: Processes for the preparation and purification of hydrofluoroolefins such as tetrafluorinated propenes. A process is provided for separating a first hydrofluoroolefin from a second hydrofluoroolefin by a) providing a mixture including a first hydrofluoroolefin and a second hydrofluoroolefin, which first hydrofluoroolefin is preferentially more reactive with an amine than the second hydrofluoroolefin; b) adding a sufficient amount of an amine to the mixture to form a combination including the second hydrofluoroolefin and a reaction product of the first hydrofluoroolefin and the amine; and then c) separating the reaction product from the combination. This is particularly useful for removing 1,2,3,3,3-pentafluoropropene (HFO-1225ye) impurities from the hydrofluoroolefin 2,3,3,3-tetrafluoropropene (HFO-1234yf). HFO-1234yf is a refrigerant with low global warming potential.
    Type: Grant
    Filed: January 29, 2010
    Date of Patent: December 17, 2013
    Assignee: Honeywell International Inc.
    Inventors: Ryan Hulse, Rajiv Ratna Singh, Ian Shankland, Michael Van Der Puy
  • Process for the preparation of fluorinated cis-alkene
    Patent number: 8604257
    Abstract: Disclosed is a process for the preparation of fluorine-containing olefins comprising contacting a chlorofluoroalkane with hydrogen in the presence of a catalyst at a temperature sufficient to cause replacement of the chlorine substituents of the chlorofluoroalkane with hydrogen to produce a fluorine-containing olefin. Also disclosed are catalyst compositions for the hydrodechlorination of chlorofluoroalkanes comprising copper metal deposited on a support, and comprising palladium deposited on calcium fluoride, poisoned with lead and reducing the in the presence or absence of a dehydrochlorination catalyst under conditions effective to form a product stream comprising cis-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336).
    Type: Grant
    Filed: May 19, 2011
    Date of Patent: December 10, 2013
    Assignee: Honeywell International Inc.
    Inventors: Andrew Joseph Poss, Michael Van Der Puy, Rajiv Ratna Singh, David Nalewajek, Haridasan K. Nair
  • Azeotrope-like compositions of pentafluoroethane and trifluoroiodomethane
    Patent number: 8598107
    Abstract: Provided are azeotrope-like compositions comprising heptafluoropropane and trifluoroiodomethane and uses thereof, including use in refrigerant compositions, refrigeration systems, blowing agents, fire suppressant compositions, and aerosol propellants.
    Type: Grant
    Filed: January 13, 2009
    Date of Patent: December 3, 2013
    Assignee: Honeywell International Inc.
    Inventors: Rajiv Ratna Singh, Hang T. Pham, Robert Gerard Richard
  • Azeotropes of methyl chloride with fluorocarbons
    Patent number: 8592538
    Abstract: Azeotropic or azeotrope-like compositions of the present technology include methyl chloride and at least one hydrofluorocarbon or hydrofluoro-olefin. In some examples, the at least one hydrofluorocarbon or hydrofluoro-olefin can be selected from the group consisting of 1,1,1,2-tetrafluoroethane and 1,3,3,3-tetrafluoropropene. The azeotropic or azeotrope-like compositions can be used as solvents or diluents in polymerization processes, including slurry polymerization processes.
    Type: Grant
    Filed: December 20, 2011
    Date of Patent: November 26, 2013
    Assignee: Honeywell International Inc.
    Inventors: Raymond Hilton Thomas, Hang T. Pham, Rajiv Ratna Singh, Natalie Merrill
  • Trans-chloro-3,3,3-trifluoropropene for use in chiller applications
    Patent number: 8574451
    Abstract: The present invention relates to refrigerant compositions containing trans-chloro-3,3,3-trifluoropropene (1233zd(E)) useful for chiller applications and processes using 1233zd(E).
    Type: Grant
    Filed: December 14, 2009
    Date of Patent: November 5, 2013
    Assignee: Honeywell International Inc.
    Inventors: Ryan Hulse, Rajiv Ratna Singh, Mark W. Spatz
  • Carrier solvent for fingerprint formulations
    Patent number: 8529684
    Abstract: A method and composition for transforming a latent physiological biometric into a visible physiological biometric are provided, the method comprising: providing a latent biometric disposed on a surface of an article, wherein said biometric comprises at least one eccrine-derived compound; contacting said latent biometric with a developing solution, wherein said developing solution comprises at least one imaging reagent selected from ninhydrin and 1,8-diazafluoren-9-one and a carrier solvent comprising at least one C3-C4 hydrofluorocarbon; and reacting said imaging reagent with said eccrine-derived compound to produce a visible physiological biometric.
    Type: Grant
    Filed: August 16, 2012
    Date of Patent: September 10, 2013
    Assignee: Honeywell International Inc.
    Inventors: David Nalewajek, Cheryl L. Cantlon, Andrew J. Poss, Rajiv Ratna Singh, Ian Shankland