C - Chemistry – Metallurgy – 08 – B
Patent
C - Chemistry, Metallurgy
08
B
C08B 16/00 (2006.01) B01D 11/02 (2006.01) D21C 5/02 (2006.01) D21C 9/08 (2006.01) A62D 3/00 (2006.01)
Patent
CA 2044323
ABSTRACT OF THE DISCLOSURE 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 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.
Blaney Carol A.
Hossain Shafi U.
Borden Ladner Gervais Llp
Kimberly-Clark Corporation
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