Xu C.,East China University of Science and Technology |
Liu D.,East China University of Science and Technology |
Fang D.,East China University of Science and Technology |
Jia Y.,Shanxi Yanchang Petroleum YuLin Coal Chemical Industry Company Ltd |
And 3 more authors.
Huaxue Fanying Gongcheng Yu Gongyi/Chemical Reaction Engineering and Technology | Year: 2012
The method of vinyl acetate synthesis from Dimethyl Ether (DME) was reviewed, in meeting with Chinese energy development strategy. Synthesis of vinyl acetate from coal raw material has the low cost advantages, and Ethylidene diacetate (EDA) is the intermediate product of this synthesis process. Experiments of EDA synthesis from DME and syngas (CO + H2) were carried in a batch autoclave with RhI3 as the main catalyst and methyl iodide/lithium iodide as the co-catalysts. The effects of reaction temperature, DME amount, CO partial pressure and H2 partial pressure on the reaction rate were investigated, and then an optimum operating condition was obtained. At the reaction temperature of 180°C, DME amount of 0.05 mol, CO partial pressure of 2.2 MPa and H2 partial pressure of 2.2 MPa; after 8 hour reaction, DME conversion was 60.00%, methyl acetate selectivity was 31.43%, and EDA selectivity was 68.56%. The results show that the reaction temperature and raw material ratio are the two key factors to affect the DME conversion and EDA selectivity. Finally, a reaction mechanism of EDA synthesis from DME and syngas was proposed based on the experimental results.