Separating aromatics from non-aromatics by polyimide-polyester m

Details Separating aromatics from non-aromatics by polyimide-polyester m Separating aromatics from non-aromatics by polyimide-polyester m

1996-07-30

1997-09-23

Sellers, Robert E.

Liquid purification or separation

Processes

Liquid/liquid solvent or colloidal extraction or diffusing...

525423, B01D 6136, C08G 5922, C08G 7310

Patent

active

056700520

ABSTRACT:
A copolymer composition comprising the hard segment of a polyimide, the soft segment of an oligomeric aliphatic polyester, and a diepoxide for crosslinking and esterification. The diepoxide polyimide copolymer membranes have exhibited high selectivity and flux for separation of an aromatic/saturate mixture. These membranes have shown much better stability in soaking with an aromatic/saturate feed than the copolymer membranes without a diepoxide.

REFERENCES:
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patent: 4830819 (1989-05-01), Sakuramoto et al.
patent: 4880895 (1989-11-01), Higashi et al.
patent: 4944880 (1990-07-01), Ho et al.
patent: 5133989 (1992-07-01), Numata et al.
patent: 5230801 (1993-07-01), Darnell et al.
patent: 5241039 (1993-08-01), Ho et al.
patent: 5254795 (1993-10-01), Boucher et al.

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