Process for the direct decaffeination of aqueous coffee extract

Details Process for the direct decaffeination of aqueous coffee extract Process for the direct decaffeination of aqueous coffee extract

1978-05-17

1982-09-07

Golian, Joseph M.

Food or edible material: processes, compositions, and products

Processes

Including gas-liquid contact

426427, 426478, A23F 522

Patent

active

043484220

ABSTRACT:
A process for the direct decaffeination of aqueous coffee extract solutions by contacting the surface of a thin film of an aqueous coffee extract solution with carbon dioxide under supercritical conditions of temperature and pressure to thereby remove the caffeine into the CO.sub.2 and directly recover the aqueous coffee extract solution substantially free from caffeine. The contacting of the aqueous coffee extract solution and the CO.sub.2 is preferably effected by passing the aqueous coffee extract solution downwardly through a packed column, while passing the CO.sub.2 upwardly in countercurrent contact therewith.

REFERENCES:
patent: 3806619 (1974-04-01), Zosel
patent: 3843824 (1974-10-01), Roselius et al.
patent: 3879569 (1975-04-01), Vetzhum
patent: 3969196 (1976-07-01), Zosel
Swetz, Coffee Processing Technology, 1963, vol. II, The Avi Publ. Co.; Westport, Conn., p. 214.

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