Title:
Production of Lignosulfonates from Eucalypt Kraft Lignin by Sulfomethylation Process
Author(s):
Demuner, I.F., Carneiro, A.C.O., Gomes, F.J.B., Coura, M.R., Carvalho, A.M.M.L., Silva, C.M.
Document(s):
Paper
Poster
Abstract:
Kraft lignin is considered residue of process, but the integration of the biorefinery concept is important to achieve a more sustainable development of kraft pulp mills. Biorefinery is a promising approach to promote a wider use of kraft lignin. The production of lignosulfonates is one of possible uses of technical lignin for the production of lignin derivative bioproduct. This study evaluates the production of lignosulfonates from eucalypt kraft lignin by sulfomethylation process. Three temperatures (100, 130 and 160 °C) and three molar ratios of sodium hydroxymethylsulfonate/lignin (0.8; 1.2 and 1.6) were evaluated. It was possible to produce lignosulfonates from eucalypt kraft lignin by the sulfomethylation process with yields close to 100%. A reduction of acid-insoluble lignin content and increase of acid-soluble lignin content was observed compared to unmodified kraft lignin. Some lignosulfonates produced by sulfomethylation obtained solubility values similar to the commercial lignosulfonate, showing that the chemical modification of kraft lignin was achieved.
Keywords:
biorefinery, lignin, waste, biobased products
Topic:
Biomass Conversion to Bio-Based Products and Chemicals
Subtopic:
Biorefinery platforms for bio-based chemicals and polymers
Event:
31st European Biomass Conference and Exhibition
Session:
6CV.7.7
Pages:
1106 - 1109
ISBN:
978-88-89407-23-3
Paper DOI:
10.5071/31stEUBCE2023-6CV.7.7
Price:
FREE
