Patents by Inventor Xuehui Sun

Xuehui Sun 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: 20220306557
    Abstract: A method of synthesizing 2,3,3,3-tetrafluoropropene (1234yf) from 2-chloro-3,3,3-trifluoropropene (1233xf). The 2-chloro-3,3,3-trifluoropropene (1233xf) is reacted in the vapor phase, in the presence of a catalyst, at a temperature and pressure sufficient to selectively convert the 2-chloro-3,3,3-trifluoropropene (1233xf) to 2,3,3,3-tetrafluoropropene (1234yf) without the use of antimony-based catalysts.
    Type: Application
    Filed: July 1, 2020
    Publication date: September 29, 2022
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventor: XUEHUI SUN
  • Patent number: 11447438
    Abstract: The present application provides a process of preparing 3,3,3-trifluoroprop-1-ene, comprising reacting 3-chloro-1,1,1-trifluoropropane with a base in an aqueous solvent component in the absence of a phase transfer catalyst.
    Type: Grant
    Filed: May 3, 2021
    Date of Patent: September 20, 2022
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Xuehui Sun, Karl Robert Krause
  • Patent number: 11440860
    Abstract: A dehydrohalogenation product includes a hydrochlorofluorocarbon mixture of a fluoroolefin of formula RCX?CZQ and a halofluoroalkane of formula RCXYCZQT. R is a perfluorinated alkyl group and X, Z, and Q are independently H or halogen. One of Y and T is H and the other is Cl, Br, or I. About 80% or greater of the hydrochlorofluorocarbon mixture is the fluoroolefin. The dehydrohalogenation product also includes a caustic agent and a solvent. In some embodiments, the dehydrohalogenation product is free of any catalyst, including any phase transfer catalyst.
    Type: Grant
    Filed: January 22, 2021
    Date of Patent: September 13, 2022
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Xuehui Sun, Karl Krause
  • Patent number: 11434185
    Abstract: This disclosure relates to processes which involve: contacting a mixture comprising at least one fluoroolefin and at least one impurity with at least one zeolite to reduce the concentration of the at least one impurity in the mixture; and the at least one zeolite is selected from the group consisting of zeolites having pore opening of at least 4 Angstroms and no more than about 5 Angstroms, zeolites having pore opening of at least about 5 Angstroms and Sanderson electronegativity of no more than about 2.6, and mixtures thereof; provided that the at least one zeolite is not zeolite 4A. This disclosure also relates to processes for making at least one hydrotetrafluoropropene product selected from the group consisting of CF3CF?CH2, CF3CH?CHF, and mixtures thereof; and relates to processes for making at least one hydrochlorotrifluoropropene product selected from the group consisting of CF3CCl?CH2, CF3CH?CHCl, and mixtures thereof.
    Type: Grant
    Filed: March 31, 2021
    Date of Patent: September 6, 2022
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Mario Joseph Nappa, Xuehui Sun, David Richard Corbin
  • Publication number: 20220234971
    Abstract: A process is provided comprising contacting and reacting the compound CF3CF2CHXC, wherein X is H or Cl, or the compound CF3CF=CXCl, wherein X is H or Cl, with hydrogen in the presence of a catalyst consisting essentially of Cu, Ru, Cu—Pd, Ni—Cu, and Ni—Pd, to obtain as a result thereof reaction product comprising hydrofluoropropenes or intermediates convertible to said hydrofluoropropenes, notably CF3CF=CH2 and CF3CH=CHF.
    Type: Application
    Filed: April 18, 2022
    Publication date: July 28, 2022
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventor: XUEHUI SUN
  • Publication number: 20220213009
    Abstract: A method hydrofluorinates an olefin of the formula: RCX?CYZ to produce a hydrofluoroalkane of formula RCXFCHYZ or RCXHCFYZ, where X, Y, and Z are independently the same or different and are selected from the group consisting of H, F, Cl, Br, and C1-C6 alkyl which is partially or fully substituted with chloro or fluoro or bromo; and R is a C1-C6 alkyl which is unsubstituted or substituted with chloro or fluoro or bromo. The method includes reacting the olefin with HF in the vapor phase, in the presence of SbF5, at a temperature ranging from about ?30° C. to about 65° C. and compositions formed by the process.
    Type: Application
    Filed: March 24, 2022
    Publication date: July 7, 2022
    Inventors: Xuehui SUN, Mario Joseph Nappa, Karl Krause
  • Patent number: 11332424
    Abstract: A process is provided comprising contacting and reacting the compound CF3CF2CHXCl, wherein X is H or Cl, or the compound CF3CF?CXCl, wherein X is H or Cl, with hydrogen in the presence of a catalyst consisting essentially of Cu, Ru, Cu—Pd, Ni—Cu, and Ni—Pd, to obtain as a result thereof reaction product comprising hydrofluoropropenes or intermediates convertible to said hydrofluoropropenes, notably CF3CF?CH2 and CF3CH?CHF.
    Type: Grant
    Filed: September 18, 2020
    Date of Patent: May 17, 2022
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventor: Xuehui Sun
  • Patent number: 11192842
    Abstract: A method of separating 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) includes providing an untreated composition including 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a). The untreated composition is treated with an adsorbent to form a treated composition in which the concentration of 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) is less than 93 percent of the concentration of the 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) in the untreated composition based on a treatment time of 24 hours.
    Type: Grant
    Filed: November 11, 2020
    Date of Patent: December 7, 2021
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventor: Xuehui Sun
  • Publication number: 20210323898
    Abstract: A method of making chlorofluorohydrocarbons including, contacting, a fluorinated hydrocarbon reagent in the vapor phase, with hydrogen chloride (HCl). The reaction is conducted in the presence of an effective amount of a catalyst, at an elevated temperature sufficient to effect hydrochlorination to form a reaction mixture including a chlorofluorohydrocarbon.
    Type: Application
    Filed: August 12, 2019
    Publication date: October 21, 2021
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventor: XUEHUI SUN
  • Publication number: 20210317055
    Abstract: A process for producing at least one haloolefin by dehydrohalogenating a hydrohaloalkane. The dehydrohalogenation process is performed in the liquid phase or vapor phase in the presence or absence of a catalyst at a temperature sufficient to effect conversion of the hydrohaloalkane to a haloolefin (haloalkene) in an adiabatic reaction zone. In particular, the adiabatic reaction zone comprises at least two serially-connected adiabatic reactors and having a heat exchanger disposed in sequence and in fluid communication between each two reactors in series.
    Type: Application
    Filed: July 18, 2019
    Publication date: October 14, 2021
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventors: KARL R. KRAUSE, CONCETTA LA MARCA, MARIO JOSEPH NAPPA, XUEHUI SUN
  • Publication number: 20210316282
    Abstract: A method of chlorinating a antimony fluorohalide catalyst is disclosed. In one embodiment the method comprises contacting an antimony fluorohalide catalyst that contains one or more fluorines with a regenerating agent chosen from 2-chloro-3,3,3-trifluoropropene (1233xf), 1,1,1,3-tetrachloropropane (250fb), 2-chloro-1,1,1,2-tetrafluoropropane (HCFC-244bb) and combinations of 1233xf, 250fb, and 244bb, under conditions effective to exchange at least one fluorine in the antimony fluorohalide catalyst with chlorine. The method can be used to regenerate spent antimony fluorohalide catalyst, for example regenerating SbCl5 from SbF5.
    Type: Application
    Filed: September 6, 2019
    Publication date: October 14, 2021
    Inventors: Xuehui SUN, Mario Joseph NAPPA, Karl KRAUSE
  • Publication number: 20210253503
    Abstract: The present application provides a process of preparing 3,3,3-trifluoroprop-1-ene, comprising reacting 3-chloro-1,1,1-trifluoropropane with a base in an aqueous solvent component in the absence of a phase transfer catalyst.
    Type: Application
    Filed: May 3, 2021
    Publication date: August 19, 2021
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventors: Xuehui Sun, Karl Robert Krause
  • Publication number: 20210221972
    Abstract: The present disclosure relates to compositions comprising Z-1,1,1,4,4,4-hexafluoro-2-butene and additional compounds that may be useful as refrigerants, heat transfer compositions, aerosol propellants, foaming agents, blowing agents, solvents, cleaning agents, carrier fluids, displacement drying agents, buffing abrasion agents, polymerization media, expansion agents for polyolefins and polyurethane, gaseous dielectrics, power cycle working fluids, extinguishing agents, and fire suppression agents in liquid or vapor form.
    Type: Application
    Filed: March 10, 2021
    Publication date: July 22, 2021
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventors: MARIO JOSEPH NAPPA, XUEHUI SUN, IVAN SERGEYEVICH BALDYCHEV, SHENG PENG, KONSTANTINOS KONTOMARIS, BARBARA HAVILAND MINOR, JOSEPH ANTHONY CREAZZO
  • Publication number: 20210221756
    Abstract: A method hydrofluorinates an olefin of the formula: RCX=CYZ to produce a hydrofluoroalkane of formula RCXFCHYZ or RCXHCFYZ, where X, Y, and Z are independently the same or different and are selected from the group consisting of H, F, Cl, Br, and C1-C6 alkyl which is partially or fully substituted with chloro or fluoro or bromo; and R is a C1-C6 alkyl which is unsubstituted or substituted with chloro or fluoro or bromo. The method includes reacting the olefin with HF in the vapor phase, in the presence of SbF5, at a temperature ranging from about ?30° C. to about 65° C. and compositions formed by the process.
    Type: Application
    Filed: April 1, 2021
    Publication date: July 22, 2021
    Inventors: Xuehui SUN, Mario Joseph NAPPA, Karl KRAUSE
  • Publication number: 20210214294
    Abstract: This disclosure relates to processes which involve: contacting a mixture comprising at least one fluoroolefin and at least one impurity with at least one zeolite to reduce the concentration of the at least one impurity in the mixture; and the at least one zeolite is selected from the group consisting of zeolites having pore opening of at least 4 Angstroms and no more than about 5 Angstroms, zeolites having pore opening of at least about 5 Angstroms and Sanderson electronegativity of no more than about 2.6, and mixtures thereof; provided that the at least one zeolite is not zeolite 4A. This disclosure also relates to processes for making at least one hydrotetrafluoropropene product selected from the group consisting of CF3CF?CH2, CF3CH?CHF, and mixtures thereof; and relates to processes for making at least one hydrochlorotrifluoropropene product selected from the group consisting of CF3CCl?CH2, CF3CH?CHCl, and mixtures thereof.
    Type: Application
    Filed: March 31, 2021
    Publication date: July 15, 2021
    Inventors: Mario Joseph NAPPA, Xuehui SUN, David Richard CORBIN
  • Patent number: 11028028
    Abstract: The present application provides a process of preparing 3,3,3-trifluoroprop-1-ene, comprising reacting 3-chloro-1,1,1-trifluoropropane with a base in an aqueous solvent component in the absence of a phase transfer catalyst.
    Type: Grant
    Filed: January 22, 2020
    Date of Patent: June 8, 2021
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Xuehui Sun, Karl Robert Krause
  • Publication number: 20210147324
    Abstract: A method of separating 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) includes providing an untreated composition including 1,1,2-trichloro-1,2,2-trifluoroethane (CFC-113) and 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a). The untreated composition is treated with an adsorbent to form a treated composition in which the concentration of 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) is less than 93 percent of the concentration of the 1,1,1-trichloro-2,2,2-trifluoroethane (CFC-113a) in the untreated composition based on a treatment time of 24 hours.
    Type: Application
    Filed: November 11, 2020
    Publication date: May 20, 2021
    Applicant: THE CHEMOURS COMPANY FC, LLC
    Inventor: XUEHUI SUN
  • Patent number: 11008267
    Abstract: The disclosure relates to a method for hydrofluorination of an olefin of the formula: RCX?CYZ to produce a hydrofluoroalkane of formula RCXFCHYZ or RCXHCFYZ, wherein X, Y, and Z are independently the same or different and are selected from the group consisting of H, F, Cl, Br, and C1-C6 alkyl which is partially or fully substituted with chloro or fluoro or bromo; and R is a C1-C6 alkyl which is unsubstituted or substituted with chloro or fluoro or bromo, comprising reacting the olefin with HF in the liquid-phase, in the presence of SbF5, at a temperature ranging from about ?30° C. to about 65° C. and compositions formed by the process.
    Type: Grant
    Filed: May 28, 2019
    Date of Patent: May 18, 2021
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Xuehui Sun, Mario Joseph Nappa, Karl Krause
  • Publication number: 20210139396
    Abstract: A dehydrohalogenation product includes a hydrochlorofluorocarbon mixture of a fluoroolefin of formula RCX?CZQ and a halofluoroalkane of formula RCXYCZQT. R is a perfluorinated alkyl group and X, Z, and Q are independently H or halogen. One of Y and T is H and the other is Cl, Br, or I. About 80% or greater of the hydrochlorofluorocarbon mixture is the fluoroolefin. The dehydrohalogenation product also includes a caustic agent and a solvent. In some embodiments, the dehydrohalogenation product is free of any catalyst, including any phase transfer catalyst.
    Type: Application
    Filed: January 22, 2021
    Publication date: May 13, 2021
    Inventors: Xuehui SUN, Karl KRAUSE
  • Patent number: 10995047
    Abstract: This disclosure relates to processes which involve: contacting a mixture comprising at least one fluoroolefin and at least one impurity with at least one zeolite to reduce the concentration of the at least one impurity in the mixture; and the at least one zeolite is selected from the group consisting of zeolites having pore opening of at least 4 Angstroms and no more than about 5 Angstroms, zeolites having pore opening of at least about 5 Angstroms and Sanderson electronegativity of no more than about 2.6, and mixtures thereof; provided that the at least one zeolite is not zeolite 4A. This disclosure also relates to processes for making at least one hydrotetrafluoropropene product selected from the group consisting of CF3CF?CH2, CF3CH?CHF, and mixtures thereof; and relates to processes for making at least one hydrochlorotrifluoropropene product selected from the group consisting of CF3CCl?CH2, CF3CH?CHCl, and mixtures thereof.
    Type: Grant
    Filed: June 20, 2019
    Date of Patent: May 4, 2021
    Assignee: THE CHEMOURS COMPANY FC, LLC
    Inventors: Mario Joseph Nappa, Xuehui Sun, David Richard Corbin