Direct conversion of lignocellulose to levulinic acid catalyzed by ionic liquid

2018 ◽  
Vol 181 ◽  
pp. 778-784 ◽  
Author(s):  
Li Liu ◽  
Zhenrui Li ◽  
Wuxin Hou ◽  
Haiyan Shen
Keyword(s):  
Ionic Liquid ◽  
Levulinic Acid ◽  
Direct Conversion ◽  
Acid Catalyzed

A synergetic effect of ionic liquid and microwave irradiation on the acid-catalyzed direct conversion of cellulose into methyl glucopyranoside

Holzforschung ◽  
2018 ◽  
Vol 72 (12) ◽  
pp. 1025-1030
Author(s):  
Mafuyu Saito ◽  
Takao Kishimoto ◽  
Masahiro Hamada ◽  
Noriyuki Nakajima ◽  
Daisuke Urabe
Keyword(s):  
Ionic Liquid ◽  
Microwave Irradiation ◽  
Synergetic Effect ◽  
Acid Catalyst ◽  
Solvent System ◽  
Direct Conversion ◽  
Important Research Topic ◽  
Acid Catalyzed ◽  
Methyl Pyrrolidone

AbstractConversion of lignocellulose into useful chemicals is an important research topic in the area of biomass utilization. In this study, microcrystalline cellulose (MC) was dissolved in a mixed-solvent system containing the ionic liquid (IL) 1-allyl-3-methylimidazolium chloride ([Amim]Cl) andN-methyl-pyrrolidone (NMP), and the cellulose was directly converted into methyl glucoside (MG) by acid-catalyzed methanolysis aided by microwave irradiation (μWIr). Under moderate reaction temperature and pressure, and in the presence of acetyl chloride/methanol (in situformed HCl) as an acid catalyst, MG was obtained in a 42% yield. In contrast, in the absence of either IL or μWIr, the MG yield was only 5 or 21%, respectively. Both μWIr and the dissolution of cellulose in IL were quite effective for the conversion of cellulose into MG.

Selective and recyclable depolymerization of cellulose to levulinic acid catalyzed by acidic ionic liquid

2015 ◽  
Vol 117 ◽  
pp. 569-576 ◽  
Author(s):  
Huifang Ren ◽  
Buana Girisuta ◽  
Yonggui Zhou ◽  
Li Liu
Keyword(s):  
Ionic Liquid ◽  
Levulinic Acid ◽  
Acidic Ionic Liquid ◽  
Acid Catalyzed

Multiple-SO3H functionalized ionic liquid as efficient catalyst for direct conversion of carbohydrate biomass into levulinic acid

2021 ◽  
Vol 509 ◽  
pp. 111659
Author(s):  
Shengbin Shi ◽  
Yuanfeng Wu ◽  
Mengting Zhang ◽  
Ruiping Wei ◽  
Lijing Gao ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Levulinic Acid ◽  
Direct Conversion ◽  
Efficient Catalyst ◽  
Functionalized Ionic Liquid

Characteristics of Solid Super Acid SO42-/TiO2-Al2O3-SnO2 during Conversion of Glucose to Levulinic Acid

2012 ◽  
Vol 550-553 ◽  
pp. 103-106
Author(s):  
Ying Liu ◽  
Lu Lin ◽  
Xiao Yu Sui ◽  
Jun Ping Zhuang ◽  
Chun Sheng Pang
Keyword(s):  
Binding Energy ◽  
Levulinic Acid ◽  
Diffraction Peak ◽  
Catalyst Amount ◽  
Hydroxymethyl Furfural ◽  
Good Catalytic Activity ◽  
Super Acid ◽  
Diffraction Peaks ◽  
Acid Catalyzed ◽  
Hydrolysis Of

The effects of catalyst amount on the yields of levulinic and hydroxymethyl furfural were investigated during conversion of glucose to levulinic acid catalyzed by solid super acid SO42- / TiO2-Al2O3-SnO2. XRD and XPS were used to analyse the characteristics of solid super acid SO42- / TiO2-Al2O3-SnO2 before reaction and after reaction. The results showed that: solid super acid SO42- / TiO2-Al2O3-SnO2exhibited good catalytic activity in the reaction of hydrolysis of glucose to produce levulinic acid. There were three obvious peaks in these XRD spectra. The peaks on 44.6° and 67.1° were the characteristic diffraction peaks of γ-Al2O3. The anatase characteristic diffraction peak was on 37.4°. The catalyst was steady in the process. The binding energy of S 2p was similar to the binding energy of standard S6+ 2p in the S 2p XPS spectrum of solid super acid. O 1s XPS was double-peaked spectrum. The increase of element C was the main reason of inactivation of catalyst.

Direct conversion of cellulose to levulinic acid using SO3H-functionalized ionic liquids containing halogen-anions

2021 ◽  
pp. 117278
Author(s):  
Shengbin Shi ◽  
Yuanfeng Wu ◽  
Mengting Zhang ◽  
Zongqi Zhang ◽  
Olayinka Oderinde ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Levulinic Acid ◽  
Direct Conversion

Supported copper catalysts for highly efficient hydrogenation of biomass-derived levulinic acid and γ-valerolactone

2016 ◽  
Vol 18 (5) ◽  
pp. 1287-1294 ◽  
Author(s):  
Qing Xu ◽  
Xinglong Li ◽  
Tao Pan ◽  
Chuguo Yu ◽  
Jin Deng ◽  
...  
Keyword(s):  
Levulinic Acid ◽  
Copper Catalysts ◽  
Direct Conversion ◽  
Highly Efficient ◽  
Chemoselective Hydrogenation ◽  
Supported Copper Catalysts

Direct conversion of cellulose-derived levulinic acid into γ-valerolactone and γ-valerolactone into 1,4-pentanediol was carried out by chemoselective hydrogenation catalyzed through supported copper-catalysts.

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