Deep Eutectic Solvent Extraction of High‐Purity Lignin from a Corn Stover Hydrolysate. Issue 17 (30th July 2020)

• Record Type: Journal Article
• Authors: Cronin, Dylan J.; Chen, Xiaowen; Moghaddam, Lalehvash; Zhang, Xiao
• Is Part Of: ChemSusChem. Volume 13:Issue 17(2020)
• Page Start: 4678
• Page End: 4690
• Publication Date: 2020-07-30
• Subjects: corn stover -- deep eutectic solvents -- depolymerization -- lignin -- hydrolysis; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202001243
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: A lactic acid/chlorine chloride‐based deep eutectic solvent (DES) was used for the extraction of high‐purity lignin (up to 94.7 %) in high yield (up to 75 %) from the hydrolysis/fermentation residue corn stover hydrolysate (CSH), which was generated from a pilot‐plant‐scale biorefinery. A range of extraction conditions were investigated, which involved varying reaction temperature, time, and DES composition. The relationship between lignin yield, purity, and structural characteristics with DES treatment conditions was determined. The extraction of high‐purity lignin from hydrolysis/fermentation residues presents a promising approach for enhancing the economic feasibility of a lignocellulose biorefinery. It was also determined that DES extraction can produce lignin with a controlled range of molecular weight and functional group content. Abstract : Lignin extraction : The extraction of lignin from a hydrolysate material is investigated by using deep eutectic solvents (DESs). The novel extraction process developed here is capable of producing a high‐purity lignin (>90 %) in high yield (≈75 % extraction yield). Additionally, the reaction conditions (temperature, time, and DES composition) can be selected to partially control the properties of the lignin obtained, without compromising yield and purity.