Process for decaffeinating green coffee
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United States of America Patent
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-
Dec 5, 1989
Issued Date -
N/A
app pub date -
Jan 25, 1989
filing date -
May 30, 1986
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A process for decaffeinating green coffee by extraction of the coffee with water and treatment of the aqueous extract with activated carbon whereby the caffeine is largely absorbed by the activated carbon. The resulting caffeine-loaded activated carbon is then treated with a selected acid whereby the caffeine is largely removed from the activated carbon. The carbon is then washed with water until it has pH in the range of 3 to 6, determined by the standard test method for pH of activated carbon (ASTM D 3838-80). The activated carbon is then ready to be reused more than ten times in the process without further treatment.
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