发明公开
EP0480476A1 Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers
失效
Verfahren zur Entfernung von polychlorierten Dibenzodioxinen，polychlorierten Dibenzofuranen und Klebrigem vonSekundärfasern。
- 专利标题： Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers
- 专利标题（中）： Verfahren zur Entfernung von polychlorierten Dibenzodioxinen，polychlorierten Dibenzofuranen und Klebrigem vonSekundärfasern。
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申请号： EP91117469.6申请日： 1991-10-14
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公开(公告)号： EP0480476A1公开(公告)日： 1992-04-15
- 发明人: Blaney, Carol Ann , Hossain, Shafi Ul
- 申请人： KIMBERLY-CLARK CORPORATION
- 申请人地址： 401 North Lake Street Neenah, Wisconsin 54956-0349 US
- 专利权人： KIMBERLY-CLARK CORPORATION
- 当前专利权人： KIMBERLY-CLARK CORPORATION
- 当前专利权人地址： 401 North Lake Street Neenah, Wisconsin 54956-0349 US
- 代理机构： DIEHL GLAESER HILTL & PARTNER
- 优先权： US596807 19901012; US596819 19901012; US686071 19910415
- 主分类号： D21C5/02
- IPC分类号： D21C5/02 ; B01D11/02 ; D21B1/32 ; D21C9/08
摘要：
A process for removing stickies and/or PCDD's and PCDF's from cellulose-containing fibers such as waste paper is provided. The process comprises contacting the fibers with supercritical or near supercritical carbon dioxide or propane for a period of time sufficient to extract a substantial portion of the stickies and/or PCDD's and PCDF's without substantially damaging the fibers. Extraction efficiencies of up to 95% of PCDD's or PCDF's and about 70% to 95% of stickies have been achieved with the technique.
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