Native lignin extraction from soft- and hardwood by green and benign sub/supercritical fluid extraction methodologies.

ABSTRACT: Lignin constitutes an impressive resource of high-value low molecular weight compounds. However, robust methods for isolation of the extractable fraction from lignocellulose are yet to be established. In this study, supercritical fluid extraction (SFE) and CO₂-expanded liquid extraction (CXLE) were employed to extract lignin from softwood and hardwood chips. Ethanol, acetone, and ethyl lactate were investigated as green organic co-solvents in the extractions. Additionally, the effects of temperature, CO₂ percentage and the water content of the co-solvent were investigated using a design of experiment approach employing full factorial designs. Ethyl lactate and acetone provided the highest gravimetric yields. The water content in the extraction mixture had the main imp

SUBMITTER: Nardella F 

PROVIDER: S-EPMC10357412 | biostudies-literature | 2023 Jul

REPOSITORIES: biostudies-literature