Patents Assigned to Dow Chemical (Nederland) B.V.
  • Preparation of polyether compositions
    Patent number: 4877879
    Abstract: In an improved process for the preparation of polyether compositions, amine-initiated, alkaline catalyzed polyethers are neutralized with a substantial excess of formic acid that neutralizes the catalyst and stabilizes the resultant composition. This is particularly advantageous where tertiary nitrogen is found in the amine initiator or in the polyether that results.
    Type: Grant
    Filed: January 4, 1988
    Date of Patent: October 31, 1989
    Assignee: Dow Chemical (Nederland) B.V.
    Inventor: Michael A. P. Gansow
  • Method of recovering HF from mixtures containing C.sub.1 -C.sub.3 halocarbon compounds
    Patent number: 3947558
    Abstract: Hydrogen fluoride can be separated from an organic mixture of fluorinated C.sub.1 -C.sub.3 compounds and recovered for reuse by selectively absorbing the HF in a glycol in which the HF is soluble, but the fluorinated organic compound is substantially insoluble. If desired, HF can be obtained in anhydrous form.
    Type: Grant
    Filed: August 16, 1973
    Date of Patent: March 30, 1976
    Assignee: Dow Chemical (Nederland) B.V.
    Inventor: A. Theodorus van Eijl