Patents Assigned to Dow Chemical Canada Limited
  • Process for selective removal of sodium sulfate from an aqueous slurry
    Patent number: 4246241
    Abstract: A process for selectively removing sodium sulfate and sodium hydroxide from an aqueous slurry containing sodium chloride, sodium sulfate and sodium hydroxide, which comprises contacting the slurry in a countercurrent wash step with cool water to remove sodium sulfate and sodium hydroxide therefrom.
    Type: Grant
    Filed: July 16, 1979
    Date of Patent: January 20, 1981
    Assignee: Dow Chemical Canada Limited
    Inventors: Indresh Mathur, Dale M. Bristow (nee Elley), Allan R. Knight