ICCAS OpenIR
One-pot synthesis of dimethyl carbonate and glycols from supercritical CO2, ethylene oxide or propylene oxide, and methanol
Chang, YH; Jiang, T; Han, BX; Liu, ZM; Wu, WZ; Gao, L; Li, JC; Gao, HX; Zhao, GY; Huang, J
2004-06-10
Source PublicationAPPLIED CATALYSIS A-GENERAL
ISSN0926-860X
Volume263Issue:2Pages:179-186
AbstractDirect syntheses of dimethyl carbonate (DMC) and glycols (GCs) front supercritical (SC) CO2, epoxides (propylene oxide or ethylene oxide), and methanol were carried out using different solid catalysts prepared in this work. The effects of various conditions, such as reaction temperature. pressure, reaction time, molar ratio of the reactants, and the properties of the supports of the catalysts, on the conversion and yields were investigated. KI supported on ZnO (KI/ZnO) and KI/ZnO with K2CO3 (K2CO3-KI/ZnO) were very active and selective for the reaction after calcinations. At 423 K, all epoxides were reacted in 4 h; the yields of DMC and GC exceeded 57% when ethylene oxide was used, and the amount of the by-products was very small (0.2%). The K2CO3-KI/ZnO could be reused four times, and the yield and selectivity remained unchanged. No leaching of the active catalyst components was detectable at the experimental conditions, probably because the reaction was conducted in homogenous supercritical conditions, where non-corrosive CO2 was the main component in the reaction mixture. A mechanism of the reaction was proposed on the basis of the experimental results. This route may be an effective way to produce DMC and glycols in large-scale because it is simple, the raw materials are cheap, and the amount of by-products is very small. (C) 2003 Elsevier B.V. All rights reserved.
KeywordSynthesis Dimethyl Carbonate Epoxides Supercritical Carbon Dioxide Methanol Solid Catalyst
DOI10.1016/j.apcata.2003.12.012
Indexed BySCI
Language英语
WOS IDWOS:000221551600006
PublisherELSEVIER SCIENCE BV
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Document Type期刊论文
Identifierhttp://ir.iccas.ac.cn/handle/121111/82294
Collection中国科学院化学研究所
Corresponding AuthorHan, BX
AffiliationChinese Acad Sci, Inst Chem, Ctr Mol Sci, Beijing 100080, Peoples R China
Recommended Citation
GB/T 7714
Chang, YH,Jiang, T,Han, BX,et al. One-pot synthesis of dimethyl carbonate and glycols from supercritical CO2, ethylene oxide or propylene oxide, and methanol[J]. APPLIED CATALYSIS A-GENERAL,2004,263(2):179-186.
APA Chang, YH.,Jiang, T.,Han, BX.,Liu, ZM.,Wu, WZ.,...&Huang, J.(2004).One-pot synthesis of dimethyl carbonate and glycols from supercritical CO2, ethylene oxide or propylene oxide, and methanol.APPLIED CATALYSIS A-GENERAL,263(2),179-186.
MLA Chang, YH,et al."One-pot synthesis of dimethyl carbonate and glycols from supercritical CO2, ethylene oxide or propylene oxide, and methanol".APPLIED CATALYSIS A-GENERAL 263.2(2004):179-186.
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