氧化铈/分子筛催化乙醇和CO_2制备碳酸二乙酯  

Preparation of Diethyl Carbonate from CO_2 and Ethanol by CeO_2 and Molecular Sieve Catalysts

作　　者：兰荣[1] 张军[1] 贾冬冬[1] 孙永跃[1] 张雪征[1] 孙有光[1] 

机构地区：[1]天津理工大学化学化工学院,天津300384

出　　处：《济南大学学报（自然科学版）》2014年第1期22-26,共5页Journal of University of Jinan(Science and Technology)

基　　金：国家自然科学基金(21106107;21003095);天津市自然科学基金(11JCZDJC24400)

摘　　要：以氧化铈/分子筛催化二氧化碳和乙醇直接合成碳酸二乙酯(DEC),研究乙烯水合对该反应的影响。采用共沉淀法制得氧化铈与3A分子筛混合,在0.3 g氧化铈、1 g分子筛、反应压力7 MPa和反应温度150℃时,反应2 h得到DEC产物0.192 mmol,副产物为1,1-2二乙氧基乙烷(Acetal),选择性达到86.1%。加入少量乙烯后,DEC的产量和选择性均变化不大,分别为0.197 mmol和80.3%。Direct synthesis of diethyl carbonate by cerium oxide and molecular sieves from carbon dioxide and ethanol was studied. The influence of ethylene hydration on this reaction was also evaluated. The cerium oxide was obtained by the precipitation method,and then mixed with 3A molecular sieves. 0. 192 mmol DEC was obtained at the optimal conditions： 0. 3 g CeO 2,1 g molecular sieves,reaction pressure of 7 MPa,reaction temperature of 150 ℃ and reaction time of 2 h. The main by-product was found to be 1,1-2 diethoxyethane,and the selectivity was up to 86. 1%. When the ethylene was added,there was no significant influence on the DEC yield and selectivity（ 0. 197 mmol and 80. 3%,respectively）.

关 键 词：氧化铈 分子筛 乙烯 二氧化碳 碳酸二乙酯 

分 类 号：TQ225.5[化学工程—有机化工]