Lignin Fractionation in Segmented Continuous Flow. Issue 17 (11th August 2020)

• Record Type: Journal Article
• Authors: Majdar, Reza Ebrahimi; Crestini, Claudia; Lange, Heiko
• Is Part Of: ChemSusChem. Volume 13:Issue 17(2020)
• Page Start: 4735
• Page End: 4742
• Publication Date: 2020-08-11
• Subjects: fractionation -- gel permeation chromatography -- lignin -- segmented continuous flow -- 31P NMR spectroscopy; Green chemistry -- Periodicals; Sustainable engineering -- Periodicals; Chemistry -- Periodicals; Chemical engineering -- Periodicals; 660
• DOI: 10.1002/cssc.202001138
• Languages: English
• ISSNs: 1864-5631

Abstract

Abstract: Lignins were fractionated in a segmented continuous flow fractionation (SCFF) approach using isocratic or gradient elution profiles of different solvent systems at various flow rates and temperatures against adjustable pressure regimes. Superior control of parameters such as temperature and pressure in combination with the possibility of freely combinable solvent gradients allowed facile fractionation and generation of industrially interesting fractions differing in molecular weight properties and/or in physicochemical properties in a process that could be fully remotely controlled for automation and performance. Scale‐up of the process was possible in linear and parallel mode. Analyses of the realised fractions by standardised gel permeation chromatography and 31 P NMR spectroscopy protocols showed that the SCFF of lignins delivered fractions that could be similar to conventional batch fractions, as well as novel/altered fractions available by applying overheated solvents in pressurised systems. Abstract : Let it flow : Commercially available softwood kraft lignin and wheat straw organosolv lignin are effectively fractionated in a dynamic segmented flow process, paving the way to facile larger‐scale production of lignin fractions using fractionated dissolution protocols.