Method of purifying polyacrylonitrile

Details Method of purifying polyacrylonitrile Method of purifying polyacrylonitrile

1992-11-20

1994-02-15

Schofer, Joseph L.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Treating polymer containing material or treating a solid...

811554, C08F 608

Patent

active

052868443

ABSTRACT:
There are disclosed a method of purifying a polyacrylonitrile which comprises removing iron compounds or ions thereof and aluminum compounds or ions thereof which can be contained as impurities in a polyacrylonitrile obtained by aqueous suspension polymerization using an inorganic redox initiator, from a solution consisting of said polyacrylonitrile and an organic solvent capable of dissolving said polyacrylonitrile, by the use of a substance having ion-exchanging ability which is insoluble in said organic solvent; a process for producing fiber from the polyacrylonitrile thus purified; and a process for producing carbon fiber from said fiber.

REFERENCES:
patent: 3395133 (1968-07-01), D'Alelio
patent: 4636540 (1987-01-01), Warfel

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