General Foods Limited

David C Hinman

Fouad Z Saleeb

Valery B Zemelman

William R Ramakka

An aqueous coffee extract is decaffeinated with a treated activated carbon. The activated carbon is first contacted with an ethyl cellulose solution in order to adsorb the ethyl cellulose on the carbon. The ethyl cellulose-containing activated carbon is then dried and contacted with an aqueous coffee extract. The substantially decaffeinated extract is subsequently separated from the carbon.

Decaffeination with treated activated carbon

The present invention provides an improved process for preparing carbonated ice directly from finely divided water ice or snow. According to the process, water ice is contacted with carbon dioxide gas at a temperature within the range of from about -20.degree. C. to about 0.degree. C. at a pressure of about 0.3 times the carbon dioxide vapor pressure at the respective temperatures, the pressure being at least sufficient to cause formation of carbon dioxide hydrate, but insufficient to liquefy the carbon dioxide, at the temperature of contact; and maintaining contact for a period of time effective to form carbon dioxide hydrate in the ice. At the preferred temperatures of from -14.degree. to -2.degree. C., the reaction rate increases dramatically.

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Tarrytown, NY, United States of America

David C Hinman