METHOD FOR REMOVING SULFUR FROM FIBER USING MONOVALENT SALT ION EXCHANGE
摘要
<p>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 aqueous salt having monovalent anions to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove displaced sulfate anions.</p>
申请公布号
EP2802691(B1)
申请公布日期
2015.12.09
申请号
EP20120701301
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;NEWTON, CHRISTOPHER, WILLIAM;RODINI, DAVID, J.