Liquid purification or separation – Processes – Liquid/liquid solvent or colloidal extraction or diffusing...
Patent
1991-03-25
1992-03-03
Foelak, Morton
Liquid purification or separation
Processes
Liquid/liquid solvent or colloidal extraction or diffusing...
21050028, B01D 6136
Patent
active
050930036
ABSTRACT:
A new copolymer composition comprising the soft segment of an aliphatic polyester and the hard segment of a highly halogenated polyurethane containing from 3 to 36 halogen atoms is disclosed. The new halogenated polyurethane copolymer membrane has high thermal stability, and good selectivity and permeability for separation of an aromatic/saturate mixture.
REFERENCES:
patent: 4960519 (1990-10-01), Semuens
patent: 4960520 (1990-10-01), Semuens
Ballinger Bruce H.
Dalrymple David C.
Ho W. S. Winston
Mastondrea Robert P.
Sartori Guido
Exxon Research and Engineering Company
Foelak Morton
Hantman Ronald D.
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