连续流化催化精馏与间歇精馏制备乳酸乙酯的对比研究

乳酸乙酯具有无毒、溶解性好、不易挥发、有果香气味等特点,是极具开发价值和应用前景的"绿色溶剂"。由于乳酸乙酯的特性,国内外学者渐渐致力于开发更高效更环保的制备方法。连续流化催化精馏是利用乳酸和乙醇酯化、粉末状大孔强酸性交换树脂作为催化剂,随反应物流动的连续催化精馏方式,是一种更优的高效而环保的乳酸乙酯生产方式。首次利用连续流化催化精馏制备乳酸乙酯,并旨在研究连续流化催化精馏与间歇精馏制备乳酸乙酯的对比来突出前者的优势,对连续流化催化精馏的产物进行精馏提纯,得到更高纯度的乳酸乙酯,为连续流化催化精馏制备乳酸乙酯的优势提供了可靠的理论依据,并在食品工业等高纯度要求的工业中的运用起到了推进作用。

Comparison of Ethyl Lactate Synthesis by Continuous Fluidized Catalytic Distillation and Batch Distillation

Ethyl lactate has solvent properties of non-toxic, good solubility, less volatile and fruity smell, which is of great value and application prospect of "green solvents". Due to the characteristics of ethyl lactate, domestic and foreign scholars gradually focused on the development of more efficient and environmentally friendly method for preparation. Continuous fluidized catalytic distillation is a continuous, a highly efficient and environmentally friendly production method, in which the esterification of lactic acid and ethanol by super-acid cation exchange resin powder as a catalyst with the reaction flow. This paper aims to study synthesis of ethyl lactate by continuous fluidized catalytic and the comparison of continuous fluidized catalytic distillation and batch distillation to highlight former advantage. The results provide a reliable theoretical basis for continuous fluidized catalytic distillation to produce ethyl lactate, which plays a propulsive role in the food industry that has high purity requirements.