固体超强酸SO_4^(2-)/CeO_2催化合成D,L-丙交酯  

Study on synthesis of D,L-lactide catalyzed by solid superacid SO_4^(2-)/CeO_2

作　　者：冯雪风[1,2] 金卫根[1,2] 杨婥[1,2] 陈昌林[1,2] 

机构地区：[1]核资源与环境教育部重点实验室(东华理工大学),江西南昌330013 [2]东华理工大学化学生物与材料科学学院,江西抚州344000

出　　处：《天然气化工—C1化学与化工》2009年第6期7-10,共4页Natural Gas Chemical Industry

基　　金：核资源与环境教育部重点实验室开放基金项目(070707)

摘　　要：制备了固体超强酸催化剂SO42-/CeO2,探索了合成D,L-丙交酯的催化剂的最优条件:用表面活性剂十二胺制备介孔二氧化铈,1mol·L-1的硫酸浸渍24h,500℃焙烧5h制备的SO42-/CeO2固体超强酸酸性强、催化活性好。并得到此催化剂合成D,L-丙交酯最优工艺条件:催化剂用量是乳酸质量的1.0%,脱水齐聚化温度为60℃～130℃,时间1.5h,解聚温度150℃～210℃,时间90min,此时丙交酯收率最高,达62.3%。Solid superacid SO4^2-/CeO2 catalysts were prepared and the effects of preparation conditions on their catalytic perfor- mances for the synthesis of D,L-lactide from lactic acid were studied. The catalyst prepared by impregnating the mesoporous CeO2 in 1 mol. L^-1 H2SO4 with dodecylamine as surfactant for 24 h and then calcining at 500℃ for 5h showed high acid strength and good activity, and with this catalyst, the yield of D,L-lactide was up to 62.3% under the optimized reaction conditions： mass ratio of catalyst to lactic acid 1：100, dehydrating at 60℃-130℃ for 1.5h under decreased pressure to form lactic oligomer and then decomposing the oligomer at 150℃-210℃ to collect D,L-lactide for 90 min.

关 键 词：D L-丙交酯 固体超强酸 乳酸 

分 类 号：O643.3[理学—物理化学]