Process for aromatization of treated tea
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United States of America Patent
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Feb 11, 1992
Grant Date -
N/A
app pub date -
Nov 15, 1989
filing date -
Nov 17, 1988
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Moistened black tea is decaffeinated using carbon dioxide as a solvent. The mixture consisting of caffeine, water, aroma constituents and gaseous carbon dioxide obtained in the course of the purification of the carbon dioxide (prior to recirculation of the latter) is removed from the separation tank and separated by raising the temperature at atmospheric pressure into an aqueous caffeine solution and a gaseous aroma fraction. The emanating carbon dioxide transports the aroma components, after a dew point depression by lowering the temperature, to decaffeinated, dried tea, to which the aroma constituents are impregnated.
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