Forming The Phosphorus Ester Group Patents (Class 558/89)
  • Patent number: 5041596
    Abstract: Glycol bisphosphate compounds are formed by first hydrolytically condensing a dihydrocarbylhalophosphate to form a tetrahyrocarbyl pyrophosphate and then reacting the pyrophosphate with a cyclic ether to form the glycol bisphosphate.
    Type: Grant
    Filed: July 3, 1989
    Date of Patent: August 20, 1991
    Assignee: Akzo America Inc.
    Inventors: Danielle A. Bright, Alan M. Aaronson
  • Patent number: 4781722
    Abstract: Novel alkanephosphonic monoester salts, preparation thereof and use thereof as spin finishes for textile fibersAlkylphosphonic monoester salts of the formula ##STR1## where R, if p=1, is alkyl, and, if p=4, a carbon atom, R.sup.1 denotes C.sub.1 -C.sub.4 -alkyl, A denotes C.sub.2 H.sub.4 and/or C.sub.3 H.sub.7, m denotes a number from 15 to 35, R.sup.2 denotes C.sub.6 -C.sub.24 -alkyl, n denotes a number from 0 to 15, and p denotes 1 or 4 . These compounds are suitable for use as spin finishes for textile fibers and are distinguished by very good thermostability.
    Type: Grant
    Filed: March 1, 1988
    Date of Patent: November 1, 1988
    Assignee: Hoechst Aktiengesellschaft
    Inventors: Hans-Jerg Kleiner, Rolf Kleber, Lothar Jaeckel
  • Patent number: 4697028
    Abstract: The invention pertains to a process for producing a disulfide dimer of hydrocarbylthiophosphonic dichloride wherein a hydrocarbylthiophosphonic dichloride is reacted with hydrogen sulfide. In the process disclosed, the reaction is conducted in the presence of a small amount of solvent which dissolves the product at high temperature and has very low solubility in the product at low temperature. In recovering the product an additional amount of solvent is added to the reaction product thereby allowing for the recovery of the product as a slurry after completion of the reaction. Optionally and preferably, a packed column is used in the process which increases the reaction rate.
    Type: Grant
    Filed: December 16, 1985
    Date of Patent: September 29, 1987
    Assignee: Stauffer Chemical Company
    Inventor: Louis F. Bolzan