Invention Grant
- Patent Title: Method for removing sulfur from fiber using a weak base
- Patent Title (中): 使用弱碱从纤维中除去硫的方法
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Application No.: US14371744Application Date: 2012-01-11
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Publication No.: US09469922B2Publication Date: 2016-10-18
- Inventor: Steven R. Allen , Vlodek Gabara , Joseph Lenning Lowery , Steven Raymond Lustig , Christopher William Newton , David J. Rodini , Andrew J. Sitter
- Applicant: Steven R. Allen , Vlodek Gabara , Joseph Lenning Lowery , Steven Raymond Lustig , Christopher William Newton , David J. Rodini , Andrew J. Sitter
- Applicant Address: US DE Wilmington
- Assignee: E I DU PONT DE NEMOURS AND COMPANY
- Current Assignee: E I DU PONT DE NEMOURS AND COMPANY
- Current Assignee Address: US DE Wilmington
- International Application: PCT/US2012/020940 WO 20120111
- International Announcement: WO2013/105953 WO 20130718
- Main IPC: C11D11/00
- IPC: C11D11/00 ; D01F6/80 ; D01D10/06
Abstract:
The present invention concerns methods for removing sulfur from a fiber comprising the steps of: a) contacting never-dried sulfur-containing fiber in a yarn with an aqueous base having a pKa less than or equal to 11 to release at least a portion of said sulfur, said sulfur comprising, at least in part, sulfate anions and said yarn comprising fiber derived from polymer comprising imidazole groups; and b) rinsing said yarn to remove at least a portion of released sulfur.
Public/Granted literature
- US20140336351A1 METHOD FOR REMOVING SULFUR FROM FIBER USING A WEAK BASE Public/Granted day:2014-11-13
Information query
