METHOD FOR PRODUCTION OF ION EXCHANGE POLYACRYLONITRILE FIBER Russian patent published in 1995 - IPC

Abstract RU 2044748 C1

FIELD: various branches of technique. SUBSTANCE: origin polyacrylonitrile fiber is initially treated at 90-95 C by aqueous 10-25 solution of hydrazine hydrate. Then treatment within 20-90 min by aqueous solution which contains NaOH and NH₄OH at ratio 1:0.2-1.5 is carried out, concentration of NaOH being 15-35 g/l. EFFECT: improves efficiency of the method.

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RU 2 044 748 C1

Authors

Barash A.N.

Kostina T.F.

Zverev M.P.

Dates

1995-09-27—Published

1993-02-11—Filed