Liao Yunhui, Li Feng, Pu Yanfeng, Wang Feng, Dai Xin, Zhao Ning, Xiao Fukui
State Key Laboratory of Coal Conversion, Institute of Coal Chemistry, Chinese Academy of Sciences 27# South Taoyuan Road Taiyuan 030001 P. R. China
University of Chinese Academy of Sciences Beijing 100049 P. R. China.
RSC Adv. 2018 Jan 2;8(2):785-791. doi: 10.1039/c7ra10832j.
The Ca-Al and Ca-Al-X (X = F, Cl and Br) catalysts were prepared thermal decomposition of Ca-Al layered double hydroxides (LDHs), and tested for methanolysis of propylene carbonate (PC) to produce dimethyl carbonate (DMC). The catalytic performance of these catalysts increased in the order of Ca-Al-Br < Ca-Al < Ca-Al-Cl < Ca-Al-F, which was consistent with the strong basicity of these materials. The recyclability test results showed that the addition of Al and halogens (F, Cl and Br) not only stabilized the CaO but also improved the recyclability of the catalysts. Particularly, the Ca-Al-F catalyst exerted the highest stability after 10 recycles. These catalysts have an important value for the exploitation of DMC synthesis by transesterification of PC with methanol.
通过热分解钙铝层状双氢氧化物（LDHs）制备了Ca-Al和Ca-Al-X（X = F、Cl和Br）催化剂，并对其进行碳酸丙烯酯（PC）甲醇解制碳酸二甲酯（DMC）的测试。这些催化剂的催化性能按Ca-Al-Br < Ca-Al < Ca-Al-Cl < Ca-Al-F的顺序增强，这与这些材料的强碱性一致。循环使用测试结果表明，Al和卤素（F、Cl和Br）的添加不仅稳定了CaO，还提高了催化剂的循环使用性。特别是，Ca-Al-F催化剂在10次循环后表现出最高的稳定性。这些催化剂对于通过PC与甲醇酯交换反应合成DMC的开发具有重要价值。
