Patents Represented by Attorney, Agent or Law Firm Beverly J. Antale
  • Polyimide membranes for hyperfiltration recovery of aromatic solvents
    Patent number: 6180008
    Abstract: Improved asymmetric hyperfiltration membranes and their method of preparation and use are disclosed. The membranes are fashioned from polyimides and conditioned with a lubricating oil. Permselective separation of aromatic hydrocarbons from non-aromatic hydrocarbons in a feed stream may be accomplished using the membranes under hyperfiltration conditions.
    Type: Grant
    Filed: July 30, 1998
    Date of Patent: January 30, 2001
    Assignee: W. R. Grace & Co.-Conn.
    Inventor: Lloyd Steven White