Food or edible material: processes – compositions – and products – Processes – Treatment of liquid with nongaseous material other than...
Patent
1990-06-01
1993-11-30
Golian, Joseph
Food or edible material: processes, compositions, and products
Processes
Treatment of liquid with nongaseous material other than...
426424, 426427, A23F 522
Patent
active
052663426
ABSTRACT:
An improved method for extracting caffeine from a coffee material, preferably raw coffee solids, with an extractant comprising supercritical carbon dioxide. Caffeine is continuously absorbed from the extractant with an aqueous wash solution in an absorber. This wash solution is continuously treated by reverse osmosis to form a caffeine-containing retentate stream and a permeate stream containing dissolved solids but substantially no caffeine. The permeate stream is recycled and used as wash water in the absorber or is used to prehydrate solid coffee materials, or both. The permeate stream comprises acidic dissolved solids.
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Katz Saul N.
Prasad Ravi
Spence Jean E.
Vogel Gerald J.
Donovan Daniel J.
Golian Joseph
Kraft General Foods Inc.
Marcoux Thomas A.
Savoie Thomas R.
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