Process for recovery of caffeine from activated carbon
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United States of America Patent
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-
Dec 6, 1994
Grant Date -
N/A
app pub date -
Jul 15, 1993
filing date -
Jul 31, 1992
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a process for recovering caffeine from caffeine-loaded activated carbon using a circulated inert gas sweeping stream held at a temperature of 250.degree. to 460.degree. C., in which process the activated carbon is preheated prior to the desorption of the caffeine with heat sources other than the sweeping gas and held during the desorption step at a uniform temperature or at a temperature increasing from the inlet to the outlet of the inert gas sweeping stream within the range of 250.degree. to 460.degree. C. and the caffeine is subsequently separated from the inert gas sweeping stream by conventional means.
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