Patents Assigned to Dirdal Rand Technologies
  • Method of producing potassium sulfate via cation exchange
    Patent number: 6986878
    Abstract: A process for producing potassium sulfate from potash and sodium sulfate, which involves providing a source of sodium sulfate and passing the sodium sulfate through cationic exchanger. Eluted potassium sulfate containing sodium sulfate is reacted with potash to form further potassium sulfate.
    Type: Grant
    Filed: December 19, 2002
    Date of Patent: January 17, 2006
    Assignee: Dirdal Rand Technologies
    Inventor: Gary Derdall
  • Method of producing potassium sulfate
    Publication number: 20030113253
    Abstract: A process for producing potassium sulfate from potash and sodium sulfate, which involves providing a source of sodium sulfate and passing the sodium sulfate through cationic exchanger. Eluted potassium sulfate containing sodium sulfate is reacted with potash to form further potassium sulfate.
    Type: Application
    Filed: December 19, 2002
    Publication date: June 19, 2003
    Applicant: Dirdal Rand Technologies
    Inventor: Gary Derdall