Invention Grant
US5213660A Secondary fiber cellulose product with reduced levels of polychlorinated
dibenzodioxins and polychlorinated dibenzofurans
失效
次氯酸二苯并二恶英和多氯二苯并呋喃含量降低的次级纤维素产品
- Patent Title: Secondary fiber cellulose product with reduced levels of polychlorinated dibenzodioxins and polychlorinated dibenzofurans
- Patent Title (中): 次氯酸二苯并二恶英和多氯二苯并呋喃含量降低的次级纤维素产品
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Application No.: US647627Application Date: 1991-02-28
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Publication No.: US5213660APublication Date: 1993-05-25
- Inventor: Shafi U. Hossain , Carol A. Blaney
- Applicant: Shafi U. Hossain , Carol A. Blaney
- Applicant Address: WI Neenah
- Assignee: Kimberly-Clark Corporation
- Current Assignee: Kimberly-Clark Corporation
- Current Assignee Address: WI Neenah
- Main IPC: A62D3/00
- IPC: A62D3/00 ; D21C5/02
Abstract:
A process for removing 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 for a period of time sufficient to extract a substantial portion of the PCDD's and PCDF's without substantially damaging the fibers. Extraction efficiencies of greater than 95% have been achieved with the technique.
Public/Granted literature
- US5703751A Electrical apparatus with a detachable power supply base Public/Granted day:1997-12-30
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