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2022 Vol.54, Issue 6 Preview Page
Exploring Deep Eutectic Solvents for the Extraction of Lignocellulosic Materials (3) : Study on Precipitation Solvents for Lignin Recovery from the Black Liquors of Sawtooth Oak Pulping

리그노셀룰로오스 물질의 추출을 위한 공융용매 탐색 (3) : 상수리나무 흑액 내 리그린 회수를 위한 침전용매 탐색

Cheol Woo Lee1
,
Kwang Seob Lee2
,
Jeong-Yong Ryu3‡
,
Kyoung-Hwa Choi4†
이철우 1
,
이광섭 2
,
류정용 3‡
,
최경화 4†
1Changgang Institute of Paper Science and Technology, Kangwon National University
2Changgang Institute of Paper Science and Technology, Kangwon National University
3Department of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University
4Changgang Institute of Paper Science and Technology, Kangwon National University
1강원대학교 창강제지기술연구소, 전임연구원
2강원대학교 창강제지기술연구소, 책임연구원
3강원대학교 산림환경과학대학 목재종이과학부 종이소재과학전공, 교수
4강원대학교 창강제지기술연구소, 연구교수
†Corresponding author: E-Mail: bleaching@kangwon.ac.kr (Address: Changgang Institute of Paper Science and Technology, Kangwon National University, Chunchon, Republic of Korea)
‡Co-corresponding Author: E-Mail: jyryu@kangown.ac.kr (Address: Department of Paper Science & Engineering, College of Forest and Environmental Sciences, Kangwon National University, Chuncheon, Republic of Korea)
30 December 2022. pp. 78-84
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Abstract

This study evaluated whether lignin can be recovered in three different deep eutectic solvent (DES) black liquors by adding various precipitation solvents. Three DES black liquors prepared by cooking the oak wood chip with carboxylic acid-based DES, phenol-based DES, and alkaline organic compound-based DES were used in this study. Six solvents were used as precipitation solvents, including distilled water, ethanol, acetone, 5% sodium hydroxide, 5% sulfuric acid, and 20% acetic acid.

The solvent causing precipitation in each black liquor differed depending on the types of DES used to extract the wood chips. The precipitation efficiency of each solvent was also varied. In the case of the carboxylic acid-based DES black liquor, distilled water had the best precipitation characteristics. In contrast, it was found that acetone for the phenol-based DES black liquor, and 20% acetic acid solution for the alkaline organic compound-based DES black liquor were the most suitable precipitation solvents. It is expected that lignin recovery in the DES black liquor is relatively simple by various solvent treatments.

Keywords
Deep eutectic solvent (DES)
phenol-based DES
Alkali-based DES
carboxylic acid-based DES
lignin recovery
precipitation solvent
References

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Information
  • Publisher :Korea Technical Association of The Pulp and Paper Industry
  • Publisher(Ko) :한국펄프종이공학회
  • Journal Title :Journal of Korea TAPPI
  • Journal Title(Ko) :펄프종이기술
  • Volume : 54
  • No :6
  • Pages :78-84
  • Received Date : 2022-11-29
  • Revised Date : 2022-12-17
  • Accepted Date : 2022-12-20
  • DOI :https://doi.org/10.7584/JKTAPPI.2022.12.54.6.78
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