Results 241 to 250 of about 56,967 (264)

Synthesis of glycerol carbonate from glycerol and dimethyl carbonate by transesterification: Catalyst screening and reaction optimization

Applied Catalysis A: General, 2009
The synthesis of glycerol carbonate from glycerol and dimethyl carbonate by transesterification is reported. Firstly, a catalyst screening has been performed by studying the influence of different basic and acid homogeneous and heterogeneous catalysts on
JOSÉ R Ochoa-Gómez, Leire Lorenzo-Ibarreta   +1 more
exaly   +2 more sources

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1H NMR assisted quantification of glycerol carbonate in the mixture of glycerol and glycerol carbonate

Talanta, 2018
Glycerol carbonate (GLC) is a very important chemical having a variety of application viz., green solvent in organic synthesis, an electrolyte in lithium batteries, wetting agent in cosmetics and precursor in polymer and food industry for the synthesis of 1,3-sn-diglycerides.
Avneet, Kaur, Ranjana, Prakash, Amjad, Ali   +2 more
openaire   +2 more sources

Biosynthesis of glycerol carbonate from glycerol by lipase in dimethyl carbonate as the solvent

Bioprocess and Biosystems Engineering, 2010
Glycerol carbonate was synthesized from renewable glycerol and dimethyl carbonate using lipase in solvent-free reaction system in which excess dimethyl carbonate played as the reaction medium. A variety of lipases have been tested for their abilities to catalyze transesterification reaction, and Candida antartica lipase B and Novozyme 435 exhibited ...
Kyung Hwa, Lee, Chang-Ho, Park, Eun Yeol, Lee   +2 more
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Electrosynthesis of Glycerol Carbonate from Glycerol and Potassium Carbonate on Nickel Electrodes

ECS Transactions, 2017
The growing biodiesel industry leads to an excess production of glycerol by-product which is of low value but costly to store or dispose because glycerol is not suitable as fuel due to its sooty flame while its discharge to water leads to eutrophication.
Hui Huang Hoe, Donald W. Kirk
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Glycerol and glycerol carbonate as ultraviscous solvents for mixture analysis by NMR

Journal of Magnetic Resonance, 2011
NMR of weakly polar analytes in an apolar ultraviscous solvent has recently been proposed for mixture analysis as a pertinent alternative to the DOSY experiment. The present article reports the first use of glycerol and glycerol carbonate as polar solvents for the NMR analysis of a model mixture of dipeptides.
Lameiras, Pedro, Boudesocque, Leslie, Mouloungui, Zéphirin, Renault, Jean-Hugues, Wieruszeski, Jean-Michel, Lippens, Guy, Nuzillard, Jean-Marc   +6 more
openaire   +3 more sources

Synthesis of glycerol carbonate from glycerol and dimethyl carbonate catalyzed by calcined silicates

Applied Catalysis A: General, 2017
Abstract Several anhydrous silicates were prepared by calcination at 400 °C and utilized as solid base catalyst for synthesizing glycerol carbonate (GC) by transesterification of glycerol with dimethyl carbonate (DMC). Among them, calcined sodium silicate showed the best catalytic activity with glycerol conversion of 97.7%.
Song Wang, Pengfei Hao, Sanxi Li, Ailing Zhang, Yinyan Guan, Linnan Zhang   +5 more
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Glycerol carbonate synthesis from glycerol and dimethyl carbonate using trisodium phosphate

Journal of the Taiwan Institute of Chemical Engineers, 2016
Abstract Glycerol, a major biodiesel byproduct, was valorized using anhydrous trisodium phosphate (TSP) as a reusable heterogeneous catalyst in glycerol carbonate (GC) synthesis. The reaction progressed via catalytic carboxylation pathway of glycerol with dimethyl carbonate (DMC) under various reaction conditions.
P.U. Okoye, A.Z. Abdullah, B.H. Hameed
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Synthesis of glycerol carbonate from glycerol and dimethyl carbonate catalyzed by K2CO3/MgO

Research on Chemical Intermediates, 2011
A series of M/MgO (M = CaO, KNO3, KOH, K2CO3) catalysts were prepared by a dry impregnation method and used for synthesis of glycerol carbonate from glycerol and dimethyl carbonate. It was found that K2CO3/MgO was the most efficient catalyst, with a glycerol carbonate yield of approximately 99% under the conditions: DMC/glycerol molar ratio 2.5:1 ...
Meimei Du, Qiuxiao Li, Wantian Dong, Tao Geng, Yajie Jiang   +4 more
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Transesterification of Glycerol to Glycerol Carbonate Over Alkali Carbonate‐Carbon Hybrid Catalysts

ChemCatChem
AbstractSodium‐containing polymers and rapeseed meal were utilized as precursors for carbon‐inorganic hybrid catalysts offering the advantages of easily accessible raw materials and a straightforward preparation process. The resulting catalysts comprised inorganic components dispersed within a carbonaceous matrix and exhibited basic properties.
Anna Malaika, Martyna Rachela, Mieczysław Kozłowski   +2 more
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Synthesis of Glycerol Carbonate from Glycerol and Dimethyl Carbonate Using Ionic Liquid Catalysts

Journal of Biobased Materials and Bioenergy, 2016
Acidic, basic and neutral ionic liquids (ILs) were prepared by two-step method. Their IR and NMR spectra showed that their structures were in accordance with their theoretical structure. Then these ILs were used as catalysts in the Glycerol carbonate (GC) of glycerol with dimethyl carbonate (DMC).
Miao, Changlin, Fan, Pei, Zhuang, Xinshu, Wang, Zhongming, Li, Huiwen, Lv, Pengmei, Yuan, Zhenhong   +6 more
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