Synthesis of Phenylethenyl Methyl Carbonate by Methoxycarbonylation of Phenylacetaldehyde with Dimethyl Carbonate

2013 ◽  
Vol 36 (7) ◽  
pp. 1125-1130 ◽  
Author(s):  
D. Wu ◽  
Z. Chen
Keyword(s):  
Dimethyl Carbonate ◽  
Methyl Carbonate

scholarly journals Lithium Methyl Carbonate as a Reaction Product of Metallic Lithium and Dimethyl Carbonate

2006 ◽  
Vol 9 (2) ◽  
pp. A64-A68 ◽  
Author(s):  
G. V. Zhuang ◽  
H. Yang ◽  
P. N. Ross ◽  
K. Xu ◽  
T. R. Jow
Keyword(s):  
Dimethyl Carbonate ◽  
Metallic Lithium ◽  
Methyl Carbonate

Carbon nanotube-supported Cu-based catalysts for oxidative carbonylation of methanol to methyl carbonate: effect of nanotube pore size

2020 ◽  
Vol 10 (8) ◽  
pp. 2615-2626 ◽  
Author(s):  
Dan Zhao ◽  
Guoqiang Zhang ◽  
Lifei Yan ◽  
Lingqi Kong ◽  
Huayan Zheng ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Carbon Nanotube ◽  
Pore Size ◽  
Dimethyl Carbonate ◽  
Oxidative Carbonylation ◽  
Inner Diameter ◽  
Methyl Carbonate

The inner diameter of CNTs significantly affected the location, dispersion, autoreduction and stability of Cu species and thus the catalytic activity and stability for oxidative carbonylation of methanol to dimethyl carbonate.

Synthesis, Characterization and Properties of Tri-n-octylmethyl-ammonium Methyl Carbonate

2013 ◽  
Vol 781-784 ◽  
pp. 263-271
Author(s):  
Kui Fang Zhang ◽  
Zuo Ying Cao ◽  
Gui Qing Zhang ◽  
Lian Sheng Xiao ◽  
Xiao Zhou Zhou
Keyword(s):  
Reaction Time ◽  
Ammonium Salt ◽  
Reaction Temperature ◽  
Quaternary Ammonium ◽  
Quaternary Ammonium Salt ◽  
Dimethyl Carbonate ◽  
Volume Fraction ◽  
Feed Solution ◽  
Molar Ratio ◽  
Methyl Carbonate

The tri-n-octylmethyl-ammonium methyl carbonate was synthesized via a high pressure process with tri-n-octylamine(tri-C8) and dimethyl carbonate(DMC) in the catalysis of tri-n-octylmethyl-ammonium bromine, and its chemical structure was confirmed using FTIR spectroscopic analysis. The influence of reactants molar ratio, reaction temperature, solvent, catalyst and reaction time on the quaternization reaction were examined, and the optimal conditions were that dimethyl carbonate(DMC):tri-n-octylamine(tri-C8)=5.6:1(molar:molar), methanol:tri-n-octylamine (tri-C8)=1:2 (volume:volume), catalysts 5% of the weight of reactant mixtures(materials fraction), reaction temperature 110°C and reaction time 8 h. Under the optimum conditions, the highest conversion rate of tri-n-octylamine(tri-C8) could reach 99.57%. A type of SO42- quaternary ammonium salt was prepared by the reaction between the product and H2SO4, and its properties on extracting vanadium in the feed solution from autoclave-soda leach solution of stone coal was researched, demonstrating that with 8% the type of SO42- quaternary ammonium salt(QAS) and 5% sec-octyl alcohols dissolved in 87% sulphonated kerosene as extractant (volume fraction), the saturated loading capacity for V2O5 reaches 14.32 g/L.

Binary Mg–Fe oxide as a highly active and magnetically separable catalyst for the synthesis of ethyl methyl carbonate

RSC Advances ◽  
2015 ◽  
Vol 5 (33) ◽  
pp. 25849-25856 ◽  
Author(s):  
Peixue Wang ◽  
Shimin Liu ◽  
Xiangyuan Ma ◽  
Yude He ◽  
Ahmad S. Alshammari ◽  
...  
Keyword(s):  
Dimethyl Carbonate ◽  
Diethyl Carbonate ◽  
Fe Oxide ◽  
Fe Oxides ◽  
Ethyl Methyl ◽  
Highly Active ◽  
Ethyl Methyl Carbonate ◽  
Magnetically Separable Catalyst ◽  
Methyl Carbonate ◽  
Magnetically Separable

The synthesis of ethyl methyl carbonate (EMC) from dimethyl carbonate (DMC) and diethyl carbonate (DEC) over magnetic binary Mg–Fe oxides.

Preparation of α-methyl-γ-butyrolactone: Mechanism of its formation and utilization in 2-methyl-1-tetralone synthesis

2008 ◽  
Vol 62 (3) ◽  
Author(s):  
Vladislav Semak ◽  
Andrej Boháč ◽  
Marta Sališová ◽  
Gabriela Addová ◽  
Peter Danko
Keyword(s):  
High Temperature ◽  
Reaction Mechanism ◽  
Dimethyl Carbonate ◽  
Selective Synthesis ◽  
Methyl Carbonate

Abstractα-Methyl-γ-butyrolactone (III) has been prepared directly from γ-butyrolactone (I) in 89 % yield by selective monomethylation conditions: K2CO3/DMC/210°C/7 h. The reaction mechanism was elucidated and described. An intermediate and two byproducts: methyl tetrahydro-3-methyl-2-oxofuran-3-carboxylate (II), 3-(methoxycarbonyl)propyl methyl carbonate (IV) and 3-(methoxycarbonyl)butyl methyl carbonate (V) were identified. The high temperature disproportionation of K2CO3 in the presence of dimethyl carbonate to MeOK was observed. The new selective synthesis of 2-methyl-1-tetralone (VI) from α-methyl-γ-butyrolactone (III) by Friedel-Crafts conditions was performed in 79 % yield.

Adsorption Equilibria of Dimethyl Carbonate and Ethyl Methyl Carbonate onto Activated Carbon

2016 ◽  
Vol 88 (3) ◽  
pp. 327-335 ◽  
Author(s):  
Friederike Stehmann ◽  
Paul Prziwara ◽  
Christian Bradtmöller ◽  
Martin Schoenitz ◽  
Stephan Scholl
Keyword(s):  
Activated Carbon ◽  
Dimethyl Carbonate ◽  
Ethyl Methyl ◽  
Adsorption Equilibria ◽  
Ethyl Methyl Carbonate ◽  
Methyl Carbonate

scholarly journals Carboxymethylation of cinnamylalcohol with dimethyl carbonate over the slag-based catalysts

2021 ◽  
Author(s):  
Ekaterina Kholkina ◽  
Narendra Kumar ◽  
Kari Eränen ◽  
Vincenzo Russo ◽  
Jani Rahkila ◽  
...  
Keyword(s):  
Competitive Ability ◽  
Dimethyl Carbonate ◽  
Crystal Morphology ◽  
Low Cost ◽  
Steel Slag ◽  
Reaction Network ◽  
Product Analysis ◽  
Wide Range ◽  
Methyl Carbonate ◽  
Slag Processing

AbstractThe carboxymethylation of cinnamylalcohol with dimethyl carbonate was performed using low-cost catalysts obtained from desulfurization slag. Processing of steel slag performed by different techniques was resulted in a wide range of the catalysts with different morphological and structural properties. Catalytic evaluation of the slag catalysts illustrated diversity of the obtained results strongly dependent on the surface area, crystal morphology and basicity. Catalytic materials demonstrated high variability of the conversion (8–85%) exhibiting similar selectivity to the desired product – cinnamyl methyl carbonate (ca. 80%). A significant impact of ultrasonication on catalytic activity was observed. Comparison of the synthesized samples with commercial basic materials illustrated competitive ability of the slag catalysts. Based on the results of catalytic evaluation and product analysis the reaction network was proposed and verified by thermodynamic analysis. A kinetic model was developed to describe concentration dependencies in carboxymethylation.

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