Maleic acid and aluminum chloride catalyzed conversion of glucose to 5-(hydroxymethyl) furfural and levulinic acid in aqueous media

2016 ◽  
Vol 18 (19) ◽  
pp. 5219-5229 ◽  
Author(s):  
Ximing Zhang ◽  
Priya Murria ◽  
Yuan Jiang ◽  
Weihua Xiao ◽  
Hilkka I. Kenttämaa ◽  
...  
Keyword(s):  
Aluminum Chloride ◽  
Maleic Acid ◽  
Levulinic Acid ◽  
Aqueous Media ◽  
Hydroxymethyl Furfural

Maleic acid (MA) and AlCl3 self-assemble into catalytic complexes (Al–(MA)2–(OH)2(aq)) with improved selectivity for converting glucose to HMF, and levulinic acid.

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.

An integrated effluent free process for the production of 5-hydroxymethyl furfural (HMF), levulinic acid (LA) and KNS-ML from aqueous seaweed extract

2020 ◽  
Vol 490 ◽  
pp. 107953
Author(s):  
Faisal Kholiya ◽  
Meena R. Rathod ◽  
Doddabhimappa R. Gangapur ◽  
S. Adimurthy ◽  
Ramavatar Meena
Keyword(s):  
Levulinic Acid ◽  
Seaweed Extract ◽  
Hydroxymethyl Furfural ◽  
Free Process

Kinetics of Maleic Acid and Aluminum Chloride Catalyzed Dehydration and Degradation of Glucose

2015 ◽  
Vol 29 (4) ◽  
pp. 2387-2393 ◽  
Author(s):  
Ximing Zhang ◽  
Barron B. Hewetson ◽  
Nathan S. Mosier
Keyword(s):  
Aluminum Chloride ◽  
Maleic Acid ◽  
Kinetics Of

Effect of Maleic Acid on the Ultraviolet Absorption of Some Antihistamine Maleate Salts

1972 ◽  
Vol 55 (6) ◽  
pp. 1168-1170
Author(s):  
James L Hamilton ◽  
Helen S Naviasky ◽  
William M Ment
Keyword(s):  
Maleic Acid ◽  
Standard Sample ◽  
Aqueous Media ◽  
Mineral Acid ◽  
Uv Spectra ◽  
Uv Absorbance ◽  
Acid Salt ◽  
Acid Moiety ◽  
Absorption Properties ◽  
Standard Solution

Abstract Several official compendial monographs contain assay procedures which compare the ultraviolet (UV) absorbance of a sample solution of a mineral acid salt of an antihistamine with that of a standard solution of the antihistamine maleate salt. The recovery data, UV absorbance values, and UV spectra presented show that erroneously low assay results are obtained when UV absorptions (below 280 nm) of antihistamine maleate sample solutions previously extracted from alkaline aqueous media into organic solvents are compared with antihistamine maleate standard sample solutions diluted directly in the same acid medium. Such errors are shown to be caused by the UV absorption properties of the maleic acid moiety.

Milder operating parameters for one‐step conversion of fructose to levulinic acid over sulfonated H‐β zeolite in aqueous media

2020 ◽  
Author(s):  
Swapneel K. Bisen ◽  
Prashant S. Niphadkar ◽  
Sachin U. Nandanwar ◽  
Irina Simakova ◽  
Vijay V. Bokade
Keyword(s):  
Levulinic Acid ◽  
Aqueous Media ◽  
Operating Parameters ◽  
Β Zeolite ◽  
One Step

Aluminum chloride‐catalyzed conversion of levulinic acid to methyl levulinate: optimization and kinetics

2020 ◽  
Vol 95 (8) ◽  
pp. 2251-2260
Author(s):  
Yanli Xu ◽  
Pengkun Guo ◽  
Chun Chang ◽  
Pan Li ◽  
Shiqiang Zhao ◽  
...  
Keyword(s):  
Aluminum Chloride ◽  
Levulinic Acid ◽  
Methyl Levulinate
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