Plural Sulfonate Groups Attached Indirectly To Each Other By Acyclic Nonionic Bonding Patents (Class 562/101)
Nitrogen or -c(=x)-, wherein x is chalcogen, attached indirectly to the sulfonate groups by nonionic bonding (Class 562/102)
Plural nonsulfonate chalcogens attached indirectly to the sulfonate groups by nonionic bonding (Class 562/103)
  • Liquid-phase fluorination
    Patent number: 5322903
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: January 17, 1992
    Date of Patent: June 21, 1994
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow
  • Liquid-phase fluorination
    Patent number: 5322904
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: March 8, 1993
    Date of Patent: June 21, 1994
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy J. Juhlke, Hajimu Kawa, Richard J. Lagow
  • Preparation of alkanedisulfonic acids
    Patent number: 5117051
    Abstract: Alkanedisulfonic acids, particularly methanedisulfonic acid (methionic acid), can be prepared by reacting the corresponding alkanesulfonic acid with chlorosulfonic acid. The reaction is carried out by heating the reactants with agitation, preferably under substantially anhydrous conditions in the presence of oxygen and at substantially atmospheric pressure. Particularly good yields are obtained using an activated carbon co-catalyst.
    Type: Grant
    Filed: October 15, 1991
    Date of Patent: May 26, 1992
    Assignee: Atochem North America, Inc.
    Inventor: Stanley R. Sandler
  • Liquid phase fluorination
    Patent number: 5093432
    Abstract: This invention pertains to a method for liquid phase fluorination for perfluorination of a wide variety of hydrogen-containing compounds.
    Type: Grant
    Filed: September 28, 1989
    Date of Patent: March 3, 1992
    Assignee: Exfluor Research Corporation
    Inventors: Thomas R. Bierschenk, Timothy Juhlke, Hajimu Kawa, Richard J. Lagow