Selective conversion of chitin to levulinic acid catalyzed by ionic liquids: distinctive effect of N-acetyl groups

2020 ◽  
Vol 22 (1) ◽  
pp. 62-70 ◽  
Author(s):  
Wuxin Hou ◽  
Qingyang Zhao ◽  
Li Liu
Keyword(s):  
Ionic Liquids ◽  
Levulinic Acid ◽  
Selective Conversion ◽  
Acid Catalyzed

Selective and green conversion of chitin to levulinic acid has been realized by catalysis of ionic liquids up to a yield of 67.0%. Two-approach mechanism was proposed in the presence of H-bonding networks mainly contributed by the N-acetyl groups.

scholarly journals Unexpected chloro-functionalized ionic liquids-promoted selective conversion of cellulose into levulinic acid

BioResources ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 9155-9165
Author(s):  
Hao Ma ◽  
Yanhui Qiao ◽  
Junjiang Teng
Keyword(s):  
Ionic Liquids ◽  
Formic Acid ◽  
Levulinic Acid ◽  
Imidazolium Chloride ◽  
Cellulose Conversion ◽  
Selective Conversion

A series of chloro-functionalized ionic liquids (CFILs) with chlorine groups (–Cl) on cations and chloride anions (Cl-) were synthesized and used as the promotion reagents for the selective conversion of cellulose into levulinic acid (LA) with the co-product of formic acid (FA). The co-operation between cations and anions of CFILs was investigated intensively through the variation of the structure of cations and the addition of salts with different anions. 3-(3-chloropropyl)-1-methyl-imidazolium chloride (IL-3) was the most appropriate additive, achieving up to 4.2%, 52.6%, and 58.7% of glucose, LA, and FA yields at 83.5% of cellulose conversion, respectively.

Selective conversion of furfuryl alcohol to levulinic acid by SO3H-containing silica nanoflower in GVL/H2O system

2021 ◽  
Vol 171 ◽  
pp. 124-132
Author(s):  
Ruoqing Wang ◽  
Feng Shen ◽  
Yiwei Tang ◽  
Haixin Guo ◽  
Richard Lee Smith ◽  
...  
Keyword(s):  
Furfuryl Alcohol ◽  
Levulinic Acid ◽  
Selective Conversion

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.

A structure–activity relationship study using DFT analysis of Bronsted–Lewis acidic ionic liquids and synergistic effect of dual acidity in one-pot conversion of glucose to value-added chemicals

2018 ◽  
Vol 42 (2) ◽  
pp. 1423-1430 ◽  
Author(s):  
Firdaus Parveen ◽  
Tanmoy Patra ◽  
Sreedevi Upadhyayula
Keyword(s):  
Ionic Liquids ◽  
Synergistic Effect ◽  
Formic Acid ◽  
Levulinic Acid ◽  
Value Added ◽  
One Pot ◽  
Structure Activity ◽  
Acidic Ionic Liquids ◽  
Commercially Important ◽  
Relationship Study

The catalytic conversion of biomass-derived carbohydrates to value-added chemicals, such as 5-hydroxymethylfurfural, levulinic acid, and formic acid, is a commercially important reaction and requires the use of both Lewis and Bronsted acids.

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

Methanesulfonic acid-catalyzed conversion of glucose and xylose mixtures to levulinic acid and furfural

2014 ◽  
Vol 52 ◽  
pp. 46-57 ◽  
Author(s):  
Darryn W. Rackemann ◽  
John P. Bartley ◽  
William O.S. Doherty
Keyword(s):  
Levulinic Acid ◽  
Methanesulfonic Acid ◽  
Acid Catalyzed
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