Patent ID: 6086769
Filing Date: 2000-07-11
Classification: B01D,G21C,G21F,Y02E,Y02W

Abstract:
A process for separating a large anion from a mixture of said large anion and smaller anions in a feed solution, said process comprising:a. providing an aqueous feed solution having a mixture of a large anion and at least one other smaller anion;b. providing an aqueous strip liquid;c. providing a microporous liquid membrane support member;d. providing a solution of a crown ether carrier in a diluent with said solution filling the pores of said microporous liquid membrane support member to form a supported liquid membrane and being immiscible with said feed solution and said strip liquid;f. contacting said feed solution with a first side of said supported liquid membrane support member;g. forming a carrier complex from a cation, said crown ether carrier and said associated large anion;h. moving said complex from said first side of said liquid membrane to a second side of said liquid membrane;i. contacting with said second side of said liquid membrane with said strip liquid;j. disassociating said cation, said crown ether carrier and said associated large anion; andk. removing at least a portion of said large anion from said supported liquid membrane into said strip liquid.