Diesel-soluble lignin oils and methods of their production

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Solvent consumption in supercritical ethanol, propanol or butanol treatment of either refined pre-extracted lignin or comparatively impure lignin-rich solid residual from hydrothermally pretreated lignocellulosic biomass can be minimized by conducting the reaction at very high loading of lignin to solvent. Comparatively impure, crude lignin- rich solid residual can be directly converted by supercritical alcohol treatment to significantly diesel-soluble lignin oil without requirement for pre-extraction or pre- solubilisation of lignin or for added reaction promoters such as catalysts, hydrogen donor co-solvents, acids, based or H2 gas. O:C ratio of product oil can readily be obtained using crude lignin residual in such a process at levels 0.20 or lower.

Original languageEnglish
IPCC10L 1/ 08 A I
Patent numberWO2016113280
Filing date21/07/2016
CountryInternational Bureau of the World Intellectual Property Organization (WIPO)
Priority date13/01/2015
Priority numberEP20150150972
Publication statusPublished - 21 Jul 2016

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