固体超强酸负载镧催化合成乳酸乙酯.pdf

35 3 Vo.l 35No. 3 2006 3 Applied Chemical Industry M ar. 2006 陈淑芬, 甘黎明, 史文权, 索陇宁, 杨兴楷, 马利海 ( , 730060) : , SO 2- /La O T iO , , 4 2 3 2 , 2- 3+ : SO /La O TiO La 0. 07 mol/L, 14 h, 450 3 h; 4 2 3 2 () = 2 1, 2. 0%, 25mL/0. 1mol, 3 h, 84. 2% : SO 2- /La O T iO ; ;; 4 2 3 2 : TQ 225. 242 : A : 1671- 3206( 2006)03- 0173- 03 Catalytic synthesis of ethyl lactate by lanthanum 2- solid superacid SO /TiO /LaO 4 2 2 3 CH EN Shuf en, GAN L im ing, SH I Wen quan, SOU L ong n ing, YAN G X ing ka ,i MA L iha i ( Petrochem icalDepartment, Lanzhou College ofPetrochem icalTechnology, Lanzhou 730060, China) 2- Abstract: Ethyl lactatewas synthesized starting from lactic acid and ethanolover solid superacid SO / 4 T iO /La O catalyst. The reaction was carried out in a Soxhlet extracting set w ith CaO as dehydrating 2 2 3 agent. The influence factorswere investigated. The results showed that the productivity of ethyl lactatewas obviously mi proved by adding dehydrating agent and watercarrying agent in the reaction system. The ap 2- 3+ propriate conditionswere as follows: SO /T iO /La O wasm ade by 0. 07 mol/L La , aging tmi ewas