Containing -s(=o)(=o)-cn Or -s(=o)(=o)-n=s=o Patents (Class 562/873)
  • Patent number: 6469206
    Abstract: Disclosed is a process for the preparation of trifluoromethanesulfonic acid anhydride by the steps of (1) forming a mixed anhydride comprising a trifluoromethanesulfonyl acyl residue and a carboxyl residue by contacting trifluoromethanesulfonic acid or a derivative thereof with a carboxyl compound selected from ketene, dialkyl ketenes, carboxylic acids, and derivatives of carboxylic acids and (2) subjecting the mixed anhydride to reactive distillation wherein the mixed anhydride undergoes disproportionation to produce triflic anhydride and a higher boiling carboxylic acid anhydride.
    Type: Grant
    Filed: February 26, 2001
    Date of Patent: October 22, 2002
    Assignee: Eastman Chemical Company
    Inventors: Robert Thomas Hembre, Robert Lin
  • Patent number: 5705689
    Abstract: A family of aza-ether based compounds including linear, multi-branched and aza-crown ethers is provided. When added to non-aqueous battery electrolytes, the family of aza-ether based compounds acts as neutral receptors to complex the anion moiety of the electrolyte salt thereby increasing the conductivity and the transference number of Li.sup.+ ion in alkali metal batteries.
    Type: Grant
    Filed: June 19, 1995
    Date of Patent: January 6, 1998
    Assignee: Associated Universities, Inc.
    Inventors: Hung Sui Lee, Xiao-Qing Yang, James McBreen
  • Patent number: 4874846
    Abstract: Process for the preparation of aryloxy-benzoic acids containing a sulphonamide group by the direct reaction of a phenoxy-benzoic acid with a sulphonamide, in the presence of a halogenating agent such as P(O)Cl.sub.3.
    Type: Grant
    Filed: May 26, 1987
    Date of Patent: October 17, 1989
    Assignee: Rhone-Poulenc Agrochimie S.A.
    Inventor: Alain Chene