Multi-phase liquid solvent decaffeination

Food or edible material: processes – compositions – and products – Processes – Treatment of liquid with nongaseous material other than...

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426427, 426428, A23F 522

Patent

active

045459983

ABSTRACT:
The process disclosed herein decaffeinates an aqueous caffeine feed solution by contacting it with a multi-phase extractant which comprises a continuous phase of a liquid, water-immiscible, caffeine-specific solvent and discontinuous aqueous phase dispersed therein. The caffeine is selectively extracted from the aqueous feed solution, leaving the solubles necessary for a good testing beverage due to the high combined selectivity of the extractant phases. Very low solvent-to-extract ratios are possible because the multi-phase extractant has a much improved partition coefficient as compared to the water-immiscible solvent.

REFERENCES:
patent: 4113886 (1978-09-01), Katz
patent: 4366179 (1982-12-01), Nawata et al.
Sivetz, Coffee User's Guide, 1963, Coffee Publications: Box 455, San Aurelmo, California, pages.
Chemical Abstracts, 4 63, (1910), C. Kippenberger, "New Ideas on the Production of Food Low in Caffeine and Theine, with a Discussion of the Patent Law of Apr. 7, 1901."
C. Kippenberger, Neue Hinweise zur Gewinnung Coffein-bzw. Teinarmer Lebensmittel, Nebst Erorterungen zum Patentgesetz vom. 7, Apr. 1891. Zeitschrift fur Angewandte Chemie, vol. 22, pp. 1837-1841, No. 38, Sep. 17, 1909.
Chemical Abstracts, 38 5608, (1944), Luiz Ribeiro Guimaraes, "The Solubility of Caffeine in Coffee Oil", Rev. quim. ind. (Rio de Janiero), 13, No. 143, 26, (1944).
Luiz Ribeiro Guimaraes, "Solubilidade da Cafeina No Oleo de Cafe", Revista de Quimica Industrial, Mar. 1944, p. 26.

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