skip to main content
Language:
Search Limited to: Search Limited to: Resource type Show Results with: Show Results with: Search type Index

Delignification of unbleached pulp by ternary deep eutectic solvents

Green processing and synthesis, 2021-10, Vol.10 (1), p.666-676 [Peer Reviewed Journal]

2021. This work is published under http://creativecommons.org/licenses/by/4.0 (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. ;ISSN: 2191-9550 ;ISSN: 2191-9542 ;EISSN: 2191-9550 ;DOI: 10.1515/gps-2021-0066

Full text available

Citations Cited by
  • Title:
    Delignification of unbleached pulp by ternary deep eutectic solvents
  • Author: Majová, Veronika ; Jablonský, Michal ; Lelovský, Marek
  • Subjects: 1,3-Propanediol ; Alcohols ; Amino acids ; Ammonium ; Ammonium salts ; Beech ; Chlorides ; Choline ; deep eutectic solvents ; delignification ; Efficiency ; fibres ; Hydrogen bonds ; Lactic acid ; Lignin ; Lignocellulose ; Organic acids ; Organic solvents ; Pulp ; Quaternary ammonium salts ; Salts ; Solvents ; Urea
  • Is Part Of: Green processing and synthesis, 2021-10, Vol.10 (1), p.666-676
  • Description: The processing of lignocellulosic materials is very limited because of their low solubility in water and some organic solvents. Fifteen ternary deep eutectic solvents (DESs) were prepared and tested as solvents suitable for delignification of unbleached pulp. The selected ternary DESs are composed of quaternary ammonium salts and amino acids as hydrogen-bond acceptors, and organic acids and polyvalent alcohols as hydrogen bond donors, with molar ratios varying for the individual components. The delignification efficiency is significantly influenced by the degree of penetration of the solvent into the pulp fibre structure. Therefore, the density and viscosity analysis of individual solvents was performed. Unbleached beech pulp with initial kappa number 13.9 was treated with the prepared DESs. The kappa number indicates the residual lignin content or the bleachability of pulp. The efficiency of the solvents ranged from 1.4% to 28.1%. The most suitable for the pretreatment of fibres, based on lignin removal efficiency, were found to be three DESs, in the following order: malonic acid/choline chloride/1,3-propanediol (1:1:3) > choline chloride/acetamide/lactic acid (1:2:3) > choline chloride/urea/lactic acid (1:2:3).
  • Publisher: Berlin: De Gruyter
  • Language: English
  • Identifier: ISSN: 2191-9550
    ISSN: 2191-9542
    EISSN: 2191-9550
    DOI: 10.1515/gps-2021-0066
  • Source: DOAJ Directory of Open Access Journals
    Walter De Gruyter: Open Access Journals
Back to results list
INSPIRE LIBRARY - TON DUC THANG UNIVERSITY (84-028) 37 755 057 Feedback
19 Nguyen Huu Tho St. Dist.7, HCM thuvien@tdtu.edu.vn

Copyright © 2017 INSPIRE LIBRARY - TON DUC THANG UNIVERSITY

Searching Remote Databases, Please Wait