发明名称 |
Method for removing polychlorinated dibenzodioxins and polychlorinated dibenzofurans and stickies from secondary fibers |
摘要 |
<p>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.</p> |
申请公布号 |
EP0480476(B1) |
申请公布日期 |
1996.05.22 |
申请号 |
EP19910117469 |
申请日期 |
1991.10.14 |
申请人 |
KIMBERLY-CLARK CORPORATION |
发明人 |
BLANEY, CAROL ANN;HOSSAIN, SHAFI UL |
分类号 |
A62D3/00;B01D11/02;D21C5/02;D21C9/08;(IPC1-7):D21C5/02;D21B1/32 |
主分类号 |
A62D3/00 |
代理机构 |
|
代理人 |
|
主权项 |
|
地址 |
|