催化剂SO_4^(2-),SnO_2-CeO_2催化合成柠檬酸三丁酯的研究

The Studies on Tri-n-butyl Citrate Ester Synthesized by the Solid Super Acid Catalyst SO_4^(2-)/SnO_2-CeO_2

采用溶胶-凝胶法制备稀土固体超强酸催化剂SO42-,SnO2-CeO2,并将其用于柠檬酸和正丁醇合成柠檬酸三丁酯的反应.着重考察了影响酯化反应的主要因素,获得了较适宜的酯化反应条件:正丁醇与柠檬酸的摩尔比为4:1,催化剂用量为4.0%,一定温度下微沸反应3.5 h,柠檬酸的酯化率达到95.87%.

The tri-n-butyl citrate ester was synthesized by citric acid and butanol under the rare earth solid super acid catalyst SO4^2-/SnO2-CeO2 which was prepared by sol-gel method. The primary factors related to the esteriflcation reaction were studied here,and the appropriate reaction condition of the esterification reaction was obtained：the mole rate of butanol to citric acid is 4：1,the catalyst amount is （total feed materials quality）4%,react 3.5 h under the certain temperature. And the esterification rate of tri-n-butyl citrate is 95.87%.