| 摘要 |
The invention relates to a method of preparing a smoke extract, which method comprises the steps of i) preparing a char from wood or cellulose preferably by pyrolysis, ii) extracting one or more fractions of the char with an extraction solvent in its supercritical state and/or an extraction solvent in its liquid state, said solvent in its supercritical state being selected from the group consisting of CO<SUB>2</SUB>, propane, methane, ethylene, ammonia, methanol, water and mixtures of one or more of these solvents, said solvent in its liquid state being selected from the group consisting of CO<SUB>2</SUB>, propane and mixtures of these components, iii) collecting at least some of the extracted char to thereby obtain a smoke extract.
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