Decreasing Molecular Weight Of Polymer Of Indeterminate Structure Patents (Class 570/152)
  • Patent number: 11884607
    Abstract: The present disclosure provides a process for producing trifluoroiodomethane, the process comprising providing a reactant stream comprising hydrogen iodide and at least one trifluoroacetyl halide selected from the group consisting of trifluoroacetyl chloride, trifluoroacetyl fluoride, trifluoroacetyl bromide, and combinations thereof, reacting the reactant stream in the presence of a first catalyst at a first reaction temperature from about 25° C. to about 400° C. to produce an intermediate product stream comprising trifluoroacetyl iodide, and reacting the intermediate product stream in the presence of a second catalyst at a second reaction temperature from about 200° C. to about 600° C. to produce a final product stream comprising the trifluoroiodomethane.
    Type: Grant
    Filed: August 17, 2022
    Date of Patent: January 30, 2024
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Glenn Matthies, Rajiv Ratna Singh, Terris Yang, Haiyou Wang, Ryan J. Hulse, Rajiv Banavali
  • Patent number: 11555136
    Abstract: The present disclosure provides azeotrope or azeotrope-like compositions including trifluoroiodomethane (CF3I) and trifluoroacetyl chloride (CF3COCl), and a method of forming an azeotrope or azeotrope-like composition comprising the step of combining trifluoroacetyl chloride (CF3COCl) and trifluoroiodomethane (CF3I) to form an azeotrope or azeotrope-like composition.
    Type: Grant
    Filed: November 19, 2021
    Date of Patent: January 17, 2023
    Assignee: Honeywell International Inc.
    Inventors: Hang T. Pham, Ryan J. Hulse, Rajiv Ratna Singh, Haridasan K. Nair
  • Patent number: 10752565
    Abstract: The present disclosure provides a gas-phase process for producing trifluoroiodomethane, the process comprising providing a reactant stream comprising hydrogen iodide and trifluoroacetyl halide selected from the group consisting of trifluoroacetyl chloride, trifluoroacetyl fluoride, trifluoroacetyl bromide, and combinations thereof, and reacting the reactant stream in the presence of a catalyst at a temperature from about 200° C. to about 600° C. to produce a product stream comprising the trifluoroiodomethane.
    Type: Grant
    Filed: August 23, 2019
    Date of Patent: August 25, 2020
    Assignee: Honeywell International Inc.
    Inventors: Haridasan K. Nair, Rajiv Banavali, Rajiv Ratna Singh
  • Patent number: 8212091
    Abstract: A process for depolymerizing fluoropolymers includes continuously feeding a solid fluoropolymer, in particulate form, into a horizontal cylindrical first reaction zone. The fluoropolymer particles enter the first reaction zone at one end. Within the first reaction zone, a central axle from which protrudes at least one paddle, continuously rotates. The rotating paddle serves to advance the fluoropolymer particles along the reaction zone while agitating them. As the fluoropolymer particles pass along the reaction zone, they are subjected to an elevated temperature, thereby depolymerizing the fluoropolymer into a fluoro-containing compound-rich gas phase. A residual solids phase is withdrawn at the other end of the first reaction zone, as is the gas phase. Optionally, the gas phase is passed through a second reaction zone which is also at an elevated temperature. The gas phase is quenched, thereby to recover the fluoro-containing compounds as gaseous products.
    Type: Grant
    Filed: November 24, 2006
    Date of Patent: July 3, 2012
    Assignee: The South African Nuclear Energy Corporation Limited
    Inventors: Izak Jacobus Van Der Walt, Alfred Teo Grunenberg, Johannes Theodorus Nel
  • Publication number: 20090149679
    Abstract: A process for depolymerizing fluoropolymers includes continuously feeding a solid fluoropolymer, in particulate form, into a horizontal cylindrical first reaction zone. The fluoropolymer particles enter the first reaction zone at one end. Within the first reaction zone, a central axle from which protrudes at least one paddle, continuously rotates. The rotating paddle serves to advance the fluoropolymer particles along the reaction zone while agitating them. As the fluoropolymer particles pass along the reaction zone, they are subjected to an elevated temperature, thereby depolymerizing the fluoropolymer into a fluoro-containing compound-rich gas phase. A residual solids phase is withdrawn at the other end of the first reaction zone, as is the gas phase. Optionally, the gas phase is passed through a second reaction zone which is also at an elevated temperature. The gas phase is quenched, thereby to recover the fluoro-containing compounds as gaseous products.
    Type: Application
    Filed: November 24, 2006
    Publication date: June 11, 2009
    Inventors: Izak Jacobus Van Der Walt, Alfred Teo Grunenberg, Johannes Theodorus Nel
  • Publication number: 20040204618
    Abstract: The present invention provides a method for obtaining a compound useful as a raw material for various fluororesins in high yield by a short process by using a starting material which is inexpensive and readily available.
    Type: Application
    Filed: April 28, 2004
    Publication date: October 14, 2004
    Applicant: ASAHI GLASS COMPANY LIMITED
    Inventors: Takashi Okazoe, Kunio Watanabe, Shin Tatematsu, Masahiro Ito, Daisuke Shirakawa, Masao Iwaya, Hidekazu Okamoto
  • Patent number: 6534687
    Abstract: Shaped soap product comprising talc, one or more fatty acids having 12-22 carbon atoms in the form of their alkali soaps and one or more cationic surfactants with the simultaneous absence of alkyl (oligo)glycosides.
    Type: Grant
    Filed: July 9, 2001
    Date of Patent: March 18, 2003
    Assignee: Beiersdorf AG
    Inventors: Michael Schultz, Jens Treu
  • Patent number: 6251843
    Abstract: A detergent composition which is suitable for making into bars for personal washing comprises: (a) 10 to 60% wt. of a synthetic, non-soap detergent; (b) 20 to 60% wt. of water soluble material which is neither soap nor a non-soap detergent and which has a melting point in the range 40° C. to 100° C.; and (c) 5 to 50% wt. of water insoluble material which is neither soap nor a non-soap detergent and which has a melting point in the range 40° C. to 100° C. The content of water, if any does not exceed 20% wt. of the composition and better is less than 15% wt. The materials (b) and (c) serve to give structure to the bars. The compositions can be prepared by melting together the above mentioned components at a temperature of 50-100° C., without the conventional energetic working. Desirably the molten mixture contains less than 20% wt. material, other than synthetic, non-soap detergent, which does not enter the liquid phase.
    Type: Grant
    Filed: September 28, 1999
    Date of Patent: June 26, 2001
    Assignee: Unilever Home & Personal Care USA, division of Conopco, Inc.
    Inventors: John George Chambers, Bryan Stuart Joy, Melissa Iva Katz, John Gerrard Sheehan
  • Patent number: 6174928
    Abstract: A fluorinated oligomer having COOH groups at both end and a &rgr;50° value of 1,000 to 10,000 is produced by swelling a fluorine rubber crosslinking product in an organic solvent, followed by decomposition in the presence of a base and a peroxide. The obtained fluorinated oligomer is soluble in solvent and thus easy to separate from fillers, etc., and can be effectively used as a chain-elongating agent for epoxy resin, isocyanate resin, oxazoline resin, etc.
    Type: Grant
    Filed: March 26, 1999
    Date of Patent: January 16, 2001
    Assignee: Nippon Mektron, Limited
    Inventors: Fumiyo Mizuide, Haruyoshi Tatsu, Sergey Vasilievich Sokolov, Michail Vasiliyevich Zhuravlev, Igor Vladimirovich Kokotin, Olga Viktorinovna Blagodatova
  • Patent number: 5432259
    Abstract: The pyrolysis of fluorine polymers leads to a high yield of pure fluorinated monomers if the finely divided polymer is introduced, with steam, into a fluidized bed reactor which contains an inert, granular material as the fluidized material, the steam functioning as the fluidizing gas.
    Type: Grant
    Filed: October 4, 1994
    Date of Patent: July 11, 1995
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Thomas Schottle, Klaus Hintzer, Hans J. Staudt, Herbert Weber