| 发明名称 |
Method for removing sulfur from fiber using monovalent salt 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 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. |
| 申请公布号 |
US9080261(B2) |
申请公布日期 |
2015.07.14 |
| 申请号 |
US201214371535 |
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. |
| 分类号 |
D01F6/80;D01D10/06;C08G69/26 |
主分类号 |
D01F6/80 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A method 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 solution comprising monovalent anions to displace at least a portion of the sulfate anions; and b) rinsing the fiber to remove displaced sulfate anions. |
| 地址 |
Wilmington DE US |
