METHOD FOR REMOVING SULFUR FROM FIBER USING HALIDE ACID ION EXCHANGE

The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion-containing polymeric-fiber with an halide-containing acid to displace at least a portion of the sulfate ions with h...

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Bibliographic Details
Main Authors ALLEN STEVEN R, NEWTON CHRISTOPHER WILLIAM, SITTER ANDREW J, LOWERY JOSEPH LENNING, LUSTIG STEVEN R, GABARA VLODEK, RODINI DAVID J
Format Patent
LanguageEnglish
Korean
Published 15.09.2014
Subjects
APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBONFILAMENTS
CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS,THREADS, FIBRES, BRISTLES OR RIBBONS
MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OFARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES ORRIBBONS
NATURAL OR ARTIFICIAL THREADS OR FIBRES
SPINNING
TEXTILES
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Summary:The present invention concerns methods for removing sulfur from a fiber made from a polymer comprising imidazole groups, said method comprising: a) contacting never-dried sulfate anion-containing polymeric-fiber with an halide-containing acid to displace at least a portion of the sulfate ions with halide anions; and b) rinsing the fiber to remove the displaced sulfate ions.
Bibliography:Application Number: KR20147021990