Modified anion exchange process

Details Modified anion exchange process Modified anion exchange process

1993-10-27

1995-12-05

Cintins, Ivars

Liquid purification or separation

Processes

Ion exchange or selective sorption

B01J 4108

Patent

active

054726166

ABSTRACT:
The invention is for a process of removing anions from an organic solution, especially one having base labile components. The process comprises modifying an anion exchange resin by treatment with a solution of a source of anions less basic than the hydroxyl anion and contacting said modified ion exchange resin with an organic solution containing anions. The process is especially useful for treating photoresist compositions.

REFERENCES:
patent: 3471553 (1969-10-01), Bittner
patent: 4540493 (1985-09-01), Dickerson et al.
patent: 4737487 (1988-04-01), Watts et al.

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