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  • Title: Accelerated solvent extraction of lignin from Aleurites moluccana (Candlenut) nutshells.
    Author: Klein AP, Beach ES, Emerson JW, Zimmerman JB.
    Journal: J Agric Food Chem; 2010 Sep 22; 58(18):10045-8. PubMed ID: 20722427.
    Abstract:
    Lignin from candlenut shells was isolated using an ethanol-water accelerated solvent extraction method. Yields (based on Klason lignin) increased from about 14 to 33% as temperature increased from 100 to 195 °C and were also influenced by the amount of aqueous acid used to precipitate lignin from the extraction liquor. These yields were higher than could be obtained using a conventional dioxane-water acidolysis method. The resulting lignin was characterized by IR, 31P NMR, and 1H-13C HMQC NMR spectroscopic techniques. The lignin contained predominantly guaiacyl units, and both the total hydroxyl group content and phenolic hydroxyl group content were high.
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