Patents Assigned to Separation Dynamics International Ltd.
  • Dual membrane process for removing organic compounds from the water
    Patent number: 5158681
    Abstract: An apparatus and process for treating water contaminated with hydrocarbons utilizes a dual membrane apparatus wherein contaminated water is first treated by a cellulose based membrane to produce a permeate fraction that is clarified and has a reduced content of hydrocarbons. The clarified permeate fraction is then treated with a reverse osmosis or nanofiltration membrane to produce a purified permeate water having an additionally lowered content of hydrocarbons.
    Type: Grant
    Filed: November 21, 1991
    Date of Patent: October 27, 1992
    Assignee: Separation Dynamics International Ltd.
    Inventors: Scott D. N. Freeman, Roy E. Larson