Recycling cellulose esters from the waste from cigarette manufacture
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United States of America Patent
Stats
-
Jul 12, 1994
Grant Date -
N/A
app pub date -
Oct 27, 1992
filing date -
Oct 27, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A process for recycling waste from the manufacture filtered cigarettes is disclosed herein. The process comprises the following steps: A waste stream from the manufacture of filtered cigarettes is provided. The waste stream includes tobacco, cellulose ester polymer, and paper. A substantial portion of the cellulose ester polymer is separated from this waste stream. This cellulose ester polymer is contacted with a sufficient volumne of fluid to extract contaminants therefrom. The fluid is under pressure and temperature conditions, such that the fluid is a supercritical or a near supercritical fluid.
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