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

scholarly journals Valorization of Cellulose Recovered from WWTP Sludge to Added Value Levulinic Acid with a Brønsted Acidic Ionic Liquid

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1004
Author(s):  
Katarzyna Glińska ◽  
Clara Lerigoleur ◽  
Jaume Giralt ◽  
Esther Torrens ◽  
Christophe Bengoa
Keyword(s):  
Ionic Liquid ◽  
Sewage Sludge ◽  
Levulinic Acid ◽  
Building Blocks ◽  
Municipal Sewage Sludge ◽  
Organic Chemical ◽  
Municipal Sludge ◽  
Primary Sludge ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid

The progressive decline of using fossil sources in the industry means that alternative resources must be found to produce chemicals. Waste biomass (sewage sludge) and waste lignocellulosic resources (food, forestry, or paper industries) are ideal candidates to take over from fossil sources. Municipal sewage sludge, and especially primary sludge, has a significant proportion of cellulose in its composition. Proper treatment of this cellulose allows the production of interesting chemicals like levulinic acid that are precursors (bio-blocks or building blocks) for other organic chemical processes. Cellulose was extracted from municipal wet primary sludge and paper industry dried sludge with a commercial ionic liquid. More than 99% of the cellulose has been recovered in both cases. Extraction was followed by the bleaching of the cellulose for its purification. In the bleaching, a large part of the ash was removed (up to 70% with municipal sludge). Finally, the purified cellulose was converted in levulinic acid by catalyzed hydrothermal liquefaction. The reaction, done at 170 °C and 7 bar, catalyzed by a tailored Brønsted acidic ionic liquid produced levulinic acid and other by-products in smaller quantities. The process had a conversion of cellulose to levulinic acid of 0.25 with municipal sludge and of 0.31 with industrial sludge. These results fully justify the process but, require further study to increase the conversion of cellulose to levulinic acid.

scholarly journals Catalytic Conversion of Glucose into Levulinic Acid Using 2-Phenyl-2-Imidazoline Based Ionic Liquid Catalyst

Molecules ◽  
2021 ◽  
Vol 26 (2) ◽  
pp. 348
Author(s):  
Komal Kumar ◽  
Mukesh Kumar ◽  
Sreedevi Upadhyayula
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Levulinic Acid ◽  
Value Added ◽  
Spectroscopic Techniques ◽  
Hydrothermal Conversion ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Ft Ir ◽  
Ir Spectroscopic

Levulinic acid (LA) is an industrially important product that can be catalytically valorized into important value-added chemicals. In this study, hydrothermal conversion of glucose into levulinic acid was attempted using Brønsted acidic ionic liquid catalyst synthesized using 2-phenyl-2-imidazoline, and 2-phenyl-2-imidazoline-based ionic liquid catalyst used in this study was synthesized in the laboratory using different anions (NO3, H2PO4, and Cl) and characterized using 1H NMR, TGA, and FT-IR spectroscopic techniques. The activity trend of the Brønsted acidic ionic liquid catalysts synthesized in the laboratory was found in the following order: [C4SO3HPhim][Cl] > [C4SO3HPhim][NO3] > [C4SO3HPhim][H2PO4]. A maximum 63% yield of the levulinic acid was obtained with 98% glucose conversion at 180 °C and 3 h reaction time using [C4SO3HPhim][Cl] ionic liquid catalyst. The effect of different reaction conditions such as reaction time, temperature, ionic liquid catalyst structures, catalyst amount, and solvents on the LA yield were investigated. Reusability of [C4SO3HPhim][Cl] catalyst up to four cycles was observed. This study demonstrates the potential of the 2-phenyl-2-imidazoline-based ionic liquid for the conversion of glucose into the important platform chemical levulinic acid.

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

Highly Efficient Oxidation of Toluene to Benzoic Acid Catalyzed by N-Hydroxyphthalimide and Oxime in PEG -1000-Based Dicationic Ionic Liquid

2013 ◽  
Vol 709 ◽  
pp. 74-79 ◽  
Author(s):  
Hui Ling Ding ◽  
Lan Ping Zeng
Keyword(s):  
Ionic Liquid ◽  
Benzoic Acid ◽  
Molecular Oxygen ◽  
Normal Pressure ◽  
Acidic Ionic Liquid ◽  
Highly Efficient ◽  
Dicationic Ionic Liquid ◽  
Acid Catalyzed

Dimethylglyoxime (DMG) and N-hydroxyphthalimide (NHPI) were used to catalyze oxidation of toluene to benzoic acid with molecular oxygen under normal pressure in PEG 1000 -based functional dicationic acidic ionic liquid (PEG1000 -DAIL). PEG1000 –DAIL enhanced the efficient catalytic ability of NHPI: 89.82% conversion of toluene with 94.63% selectivity for benzoic acid could be obtained at 80°C in 10 h.

Design of Brønsted acidic ionic liquid functionalized mesoporous organosilica nanospheres for efficient synthesis of ethyl levulinate and levulinic acid from 5-hydroxymethylfurfural

2021 ◽  
Author(s):  
Daiyu Song ◽  
Jingyu Liu ◽  
Chaoyue Zhang ◽  
Yihang Guo
Keyword(s):  
Ionic Liquid ◽  
Levulinic Acid ◽  
Catalytic Transformation ◽  
Efficient Synthesis ◽  
Practical Applications ◽  
Acidic Ionic Liquid ◽  
Mesoporous Organosilica ◽  
Brønsted Acidic Ionic Liquid ◽  
Acidic Ionic Liquids ◽  
Fuels And Chemicals

Brønsted acidic ionic liquids (BAILs) have brought new vitality in catalytic transformation of biomass to fuels and chemicals, but practical applications of BAILs suffer from drawbacks of slow diffusion and...

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