Chemicals from forest products by supercritical fluid extraction |
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Authors: | E.C. McDonald J. Howard B. Bennett |
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Affiliation: | Chemical Technology Division, B.C. Research, 3650 Wesbrook Mall, Vancouver, B.C., Canada. V6S 2L2 |
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Abstract: | Supercritical acetone or methanol extraction of wood gave liquid products with a maximum yield of 74%. Approximately 5% of these complex products was identified as substituted guaiacols and levoglucosan. Acetone extract could substitute for 30% of the phenol in phenolic resins. Resin and fatty acids were extracted from southern pine and waxes from Douglas-fir bark using supercritical carbon dioxide, nitrous oxide, propane or ethylene. Of these, propane and nitrous oxide gave the best yields. |
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