Patents by Inventor Hsueh S. Tung

Hsueh S. Tung 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: 20100119460
    Abstract: Provided are azeotropic or azeotrope-like mixtures of 2,3,3,3-tetrafluoropropene (1234yf) and 3,3,3-trifluoropropene (1243zf), as well as methods for producing and using the same.
    Type: Application
    Filed: November 9, 2009
    Publication date: May 13, 2010
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: HANG T. PHAM, RAJIV R. SINGH, HSUEH S. TUNG, DANIEL C. MERKEL, HALUK KOPKALLI, RYAN HULSE
  • Patent number: 7714177
    Abstract: Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene comprising: a) reacting a compound of the formula (I) CHFX2 with a compound of formula (II) CH2?CF2 to produce a reaction product comprising a compound of formula (III) CHXFCH2CXF2, wherein each X is independently selected from the group consisting of chlorine, bromine and iodine; and (b) exposing said compound of formula (III) to reaction conditions effective to convert said compound to 1,3,3,3-tetrafluoropropene.
    Type: Grant
    Filed: January 7, 2008
    Date of Patent: May 11, 2010
    Assignee: Honeywell International Inc.
    Inventors: Sudip Mukhopadhyay, Haridasan K. Nair, Hsueh S. Tung, Michael Van Der Puy
  • Publication number: 20100113323
    Abstract: An azeotrope-like composition consisting essentially of 1,1,1,2,3-pentachloropropane and hydrogen fluoride is provided, as well as methods that involve such an azeotrope-like composition.
    Type: Application
    Filed: October 28, 2009
    Publication date: May 6, 2010
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: HSUEH S. TUNG, HANG T. PHAM, RAJIV R. SINGH, DANIEL C. MERKEL
  • Publication number: 20100113322
    Abstract: An azeotrope-like composition consisting essentially of 1,1,2,3-tetrachloropropene and hydrogen fluoride is provided, as well as methods that involve such an azeotrope-like composition.
    Type: Application
    Filed: October 28, 2009
    Publication date: May 6, 2010
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: HSUEH S. TUNG, HANG T. PHAM, RAJIV R. SINGH, DANIEL C. MERKEL, ROBERT JOHNSON
  • Patent number: 7674939
    Abstract: Disclosed are methods for producing fluorinated organic compounds, including hydrofluoropropenes, which preferably comprises converting at least one compound of formula (I): CF3CHXCH2X??(I) to at least one compound of formula (II) CF3CZCHZ??(II). where X is independently Cl, Br, I or F, and Z independently is H or F. In certain preferred embodiments, each Z is different.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: March 9, 2010
    Assignee: Honeywell International Inc.
    Inventors: Sudip Mukhopadhyay, Haridasan K. Nair, Hsueh S. Tung, Michael Van Der Puy, Daniel C. Merkel, Rajesh K. Dubey, Jing Ji Ma
  • Patent number: 7659434
    Abstract: A method for preparing fluorinated organic compounds comprising contacting hydrogen fluoride with at least one compound of formula I: CX3CXYCH3??I where each X is independently Cl, I or Br, and each Y is independently H or F, said contacting step being carried out under conditions effective to produce a compound of formula II CF3CZCH2??II where Z is Cl, I, Br, or F.
    Type: Grant
    Filed: November 3, 2006
    Date of Patent: February 9, 2010
    Assignee: Honeywell International Inc.
    Inventors: Sudip Mukhopadhyay, Haridasan K. Nair, Hsueh S. Tung, Michael Van Der Puy, Daniel C. Merkel, Rajesh K. Dubey, Jing Ji Ma, Barbara A. Light, Kim M. Fleming, Cheryl L. Bortz, Richard Udy
  • Publication number: 20100022809
    Abstract: Disclosed is a method for forming HFO-1234ze, and for forming compositions comprising HFO-1234ze, by (a) converting, preferably by dehydrofluorination, pentafluorpropane (HFC-245), preferably 1,1,1,3,3-pentafluorpropane (HFC-245fa), preferably by contact with a caustic solution, to a reaction product comprising cis-HFO-1234ze and trans-HFO-1234ze; and (b) contacting at least a portion, preferably substantially portion, and in certain embodiments substantially all of said reaction product with at least one isomerization catalyst to convert at least a portion, and preferably at least a substantial portion, of cis-HFO-1234ze in said reaction product to trans-HFO-1234ze.
    Type: Application
    Filed: May 21, 2008
    Publication date: January 28, 2010
    Applicant: HONEYWELL INTERNATIONAL, INC.
    Inventors: Stephen A. Cottrell, Hsueh S. Tung, Haiyou Wang
  • Publication number: 20090030244
    Abstract: The present invention relates to an improved method for manufacturing 2-chloro-3,3,3,-trifluoropropene (HCFC-1233xf) by reacting 1,1,2,3-tetrachloropropene, 1,1,1,2,3-pentachloropropane, and/or 2,3,3,3-tetrachloropropene with hydrogen fluoride, in a vapor phase reaction vessel in the presence of a vapor phase fluorination catalyst and stabilizer. HCFC-1233xf is an intermediate in the production of 2,3,3,3-tetrafluoropropene (HFO-1234yf) which is a refrigerant with low global warming potential.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 29, 2009
    Applicant: Honeywell International Inc.
    Inventors: Daniel C. Merkel, Hsueh S. Tung
  • Publication number: 20090030247
    Abstract: Disclosed are processes for the production of fluorinated olefins, preferably adapted to commercialization of CF3CF?CH2 (1234yf). In certain preferred embodiments the processes comprise first exposing a compound of Formula (IA) C(X)2?CClC(X)3??(IA) where each X is independently F, Cl or H, preferably CCl2?CClCH2Cl, to one or more sets of reaction conditions, but preferably a substantially single set of reaction conditions, effective to produce at least one chlorofluoropropane, preferably in accordance with Formula (IB): CF3CClXC(X)3??Formula (IB) where each X? is independently F, Cl or H, and then exposing the compound of Formula (IB) to one or more sets of reaction conditions, but preferably a substantially single set of reaction conditions, effective to produce a compound of Formula (II) CF3CF?CHZ??(II) where Z is H, F, Cl, I or Br.
    Type: Application
    Filed: August 1, 2008
    Publication date: January 29, 2009
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Robert C. Johnson, Hsueh S. Tung, Daniel C. Merkel
  • Publication number: 20090030249
    Abstract: Provided is a continuous process for preparing 1,1,2,3-tetrachloro-1-propene having the steps of catalytically dehydrochlorinating CH2ClCCl2CH2Cl in the gas phase to produce CHCl?CClCH2Cl; chlorinating the CHCl?CClCH2Cl to form CHCl2CCl2CH2Cl; and catalytically dehydrochlorinating the CHCl2CCl2CH2Cl in the gas phase to form CCl2?CClCH2Cl.
    Type: Application
    Filed: July 24, 2008
    Publication date: January 29, 2009
    Applicant: HONEYWELL INTERNATIONAL INC.
    Inventors: Daniel C. Merkel, Hsueh S. Tung, Michael Van Der Puy, Jing Ji Ma
  • Patent number: 7371904
    Abstract: Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene which comprises, in one embodiment, reacting a compound of CF3X1 with a compound of CX2H?CHX3, wherein X1, X2, and X3 are each independently selected from the group consisting of fluorine, chlorine, bromine and iodine, to produce a reaction product comprising a compound of CF3CH?CHX3, wherein X3 is as described above; and when X3 is not fluorine, fluorinating the compound to produce 1,3,3,3-tetrafluoropropene. The process in another embodiment comprises preparing tetrafluoropropene comprising thermally cracking one or more compounds capable of producing a reaction mixture which preferably comprises diflurocarbene radicals and vinylidene fluoride, and converting said reaction mixture into—tetrafluoropropene (1,3,3,3-tetrafluoropropene).
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: May 13, 2008
    Assignee: Honeywell International Inc.
    Inventors: Jing Ji Ma, Sudip Mukhopadhyay, Haridasan K. Nair, Hsueh S. Tung, Michael Van Der Puy
  • Patent number: 7361795
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
    Type: Grant
    Filed: October 14, 2003
    Date of Patent: April 22, 2008
    Assignee: Honeywell International, Inc.
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Patent number: 7345209
    Abstract: Disclosed is a process for the synthesis of 1,3,3,3-tetrafluoropropene that comprises, in one preferred embodiment, providing a compound of the formula CF3CH2CHFX, wherein X is a selected from the group consisting of chlorine, bromine and iodine, and exposing said compound to reaction conditions effective to convert said compound to 1,3,3,3-tetrafluoropropene. Other processes for forming 1,3,3,3-tetrafluoropropene are also disclosed.
    Type: Grant
    Filed: April 29, 2005
    Date of Patent: March 18, 2008
    Assignee: Honeywell International Inc.
    Inventors: Sudip Mukhopadhyay, Haridasan K. Nair, Hsueh S. Tung, Michael Van Der Puy
  • Patent number: 6780815
    Abstract: A process for preparing a fluorination catalyst using a low pressure activating step followed by a high pressure activating step.
    Type: Grant
    Filed: June 28, 2002
    Date of Patent: August 24, 2004
    Assignee: Honeywell International Inc.
    Inventors: Gustavo Cerri, Yuon Chiu, Jason T. Stuck, Hsueh S. Tung
  • Publication number: 20040084295
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
    Type: Application
    Filed: October 14, 2003
    Publication date: May 6, 2004
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Patent number: 6689924
    Abstract: A process for the catalytic fluorination of hydrochlorocarbons and hydrochlorofluorocarbons in the liquid phase. The process is useful for fluorinating hydrochloropropanes, hydrochlorofluoropropanes, hydrochloropropenes and hydrochlorofluoropropenes and most particularly useful for fluorinating 1,1,1,3,3-pentachloropropane to 1,1,1,3,3-pentafloropropane.
    Type: Grant
    Filed: December 20, 1999
    Date of Patent: February 10, 2004
    Assignee: Honeywell International Inc.
    Inventors: Alagappan Thenappan, Hsueh S. Tung, Robert L. Bell
  • Patent number: 6673264
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
    Type: Grant
    Filed: June 3, 2002
    Date of Patent: January 6, 2004
    Assignee: Honeywell International Inc.
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Publication number: 20030022785
    Abstract: A process for preparing a fluorination catalyst using a low pressure activating step followed by a high pressure activating step.
    Type: Application
    Filed: June 28, 2002
    Publication date: January 30, 2003
    Inventors: Gustavo Cerri, Yuon Chiu, Jason T. Stuck, Hsueh S. Tung
  • Publication number: 20030015683
    Abstract: The present invention provides binary azeotrope-like compositions comprising pentafluoroethane (HFC-125) and hydrogen chloride (HCl). In addition, the invention relates to methods for removing HFC-125 or HCl from a mixture of HFC-125 and HCl by distilling the mixture to remove an azeotrope-like composition of HFC-125 and HCl in the column distillate.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 23, 2003
    Inventors: Rajat S. Basu, Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung
  • Publication number: 20030009065
    Abstract: The invention relates to azeotropic and azeotrope-like mixtures of 1,1,1,3,3-pentafluorobutane (HFC-365) and hydrogen fluoride and a process for separating the azeotrope-like mixtures. The compositions of the invention are useful as an intermediate in the production of HFC-365. The latter is useful as a nontoxic, zero ozone depleting fluorocarbon useful as a solvent, blowing agent, refrigerant, cleaning agent and aerosol to propellant.
    Type: Application
    Filed: June 3, 2002
    Publication date: January 9, 2003
    Inventors: Hang T. Pham, Rajiv R. Singh, Hsueh S. Tung