Carbon-caffeine separation

Details Carbon-caffeine separation Carbon-caffeine separation

1980-06-16

1981-11-03

Rizzo, Nicholas S.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen bonded directly to ring carbon of the purine ring...

544275, C07D47312

Patent

active

042987369

ABSTRACT:
The object of the invention is to provide an improved process for recovering caffeine adsorbed on activated carbon.
Caffeine removed from the commercial decaffeination of vegetable materials and extracts can be effectively removed from the extraction solvent, or can be purified, by the use of activated carbon. Unfortunately, the caffeine is tenaciously held by the carbon and none of the techniques currently available for removing the caffeine is wholly satisfactory.
The recovery of caffeine from activated carbon is accomplished according to the present invention by employing a liquid, food-grade caffeine solvent which comprises an organic acid or alcohol, and which is capable of competing for the active sites on the carbon occupied by the caffeine to displace at least a portion of the caffeine which is then dissolved in the solvent. After the desired period of contact, the caffeine is separated from the solvent. The solvent will preferably comprise glacial acetic acid or an acetic acid azeotrope, and contact will preferably be at a temperature above 100.degree. C.

REFERENCES:
patent: 1855026 (1980-10-01), Livingstone et al.
patent: 2508545 (1950-05-01), Shuman

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