Processes for recovery of derivatives of native lignin
AssigneeLignol Innovations Ltd.
InventorsMikhail Yurevich Balakshin, Alex Berlin, Humbert Thomas Dellicolli, Chadrick Adam Nathaniel Jordan Grunert, Vera Maximenko Gutman, Darwin Ortiz, Edward Kendall Pye
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Abstract
The present disclosure relates to processes for recovery of derivatives of native lignin from lignocellulosic feedstocks wherein the derivatives have a certain aliphatic hydroxyl content. Surprisingly, it has been found that stable and predictable antioxidant activity is provided by selecting for derivatives of native lignin having a certain aliphatic hydroxyl content.
Claims7
A process for recovering a lignin derivative from a feedstock comprising softwood biomass, the lignin derivative having an aliphatic hydroxyl content of 7.0 mmol/g or less, the process comprises the steps of:
- pulping the feedstock with a selected organic solvent (ETHANOL) supplemented with a selected acid catalyst (pH) for a selected period of time (TIME) at a selected temperature (TEMPERATURE) to produce a cellulosic solids fraction and an extractives liquid fraction;
- separating the cellulosic solids fraction from the extractives liquid fraction;
- and
- recovering the lignin derivative from the extractives liquid fraction, wherein softwood feedstock comprises Picea spp., Pinus spp., and combinations/hybrids thereof.
Dependencies are inferred from the claim text.