Verfahren zur Entfernung von polychlorierten Dibenzodioxinen, polychlorierten Dibenzofuranen und Klebrigem von Sekundärfasern
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
DE69119687(T2)
申请公布日期
1996.11.28
申请号
DE1991619687T
申请日期
1991.10.14
申请人
KIMBERLY-CLARK CORP., NEENAH, WIS., US
发明人
BLANEY, CAROL ANN, ROSWELL, GA 30075, US;HOSSAIN, SHAFI UL, MENASHA, WI 54952, US