Green Biomass Sciences Progressed by Ionic Liquids Technology

2014 Fiscal Year Final Research Report

• Project/Area Number: 25550091
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Design and evaluation of sustainable and environmental conscious system
• Research Institution: Tottori University
• Principal Investigator: ITOH Toshiyuki 鳥取大学, 工学(系)研究科(研究院), 教授 (50193503)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: イオン液体 / リグノセルロース / リグニン溶解性 / セルロース溶解性 / 3成分分離 / アミノ酸 / 再生使用

Outline of Final Research Achievements

We have found that N-methyl-N-(2-methoxyethyl)pyrolidin-1-ium 2,6-diaminohexanoate ([P1ME][Lys]) dissolved lignin very well at below 60°C, but that 80°C was required for it to dissolve cellulose. Taking advantage of this difference in dissolution ability, direct extraction of lignin from wood biomass has been accomplished under mild conditions without use of any hazardous reagents. We have thus achieved the demonstration of the sacrifice-free separation of cellulose, hemicellulose, and lignin from wood biomass (Japanese cedar: Cryptomeria japonica). We next attempted to dsign ILs that could disscolve a wet cellulose; among tested ILs, tributyl(3-methoxypropylp)phosphonium β-alanine ([P444MP][β-Ala]) showed the highest polarity and dissoved 5 wt% of wet cellulose which included water (1 eq. vs IL ion pair) .

Free Research Field

環境学