Patent ID: 7244461
Filing Date: 2007-07-17
Classification: A23B,A23L,A23V

Abstract:
1. A method of preparing a smoke extract comprising the steps of: i) preparing a char from wood or cellulose by pyrolysis; ii) placing a portion of the char in a reaction container; iii) obtaining an extraction solvent in its supercritical state, said solvent in its supercritical state being selected from the group consisting of CO iv) maintaining the extraction solvent in its supercritical state at a temperature between 20° C. and 100° C. and at a pressure between 75 and 500 bars. v) bringing the extraction solvent in its supercritical state into intimate contact with the char for a sufficient time to extract a measurable amount of the char and to reduce the amount of benzo(a)pyrene and benzo(anthracene so that the char is safe for use as a food flavoring; vi) removing the solvent from the extracted char from step v); vii) reducing the pressure, in one or more steps, to condense at least a portion of the extracted char in each step of pressure reduction; and viii) collecting the extracted condensed char.