METHOD FOR REMOVING SULFUR FROM FIBER USING HALIDE ACID ION EXCHANGE
摘要
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.
申请公布号
EP2802696(A1)
申请公布日期
2014.11.19
申请号
EP20120702648
申请日期
2012.01.11
申请人
E. I. DU PONT DE NEMOURS AND COMPANY
发明人
ALLEN, STEVEN R.;GABARA, VLODEK;LOWERY, JOSEPH LENNING;LUSTIG, STEVEN R.;NEWTON, CHRISTOPHER WILLIAM;RODINI, DAVID J.;SITTER, ANDREW J.