【摘要】 乳酸和乙醇的酯化反应可以用大孔强酸性离子交换树脂催化,乳酸和乙醇的混合物流过用热水保温的树脂柱,将所得的产物混合物减压蒸馏就得到符合食品卫生标准的乳酸乙酯,余下的残液可直接回用。本文讨论了反应温度、醇酸摩尔比、反应物流速、树脂床高等因素对产率的影响,按选定的最佳条件,总产率可超过80％。更多还原

【Abstract】 Ethyl lactaic was prepared by esterif icat ion of lactic acid with ethanolin the presence of strong-acid cation exchange resin as catalyst. In this process the mixture of lactic acid and ethanol was passed through a resin column insulated with hot water, the effluent was purified by rectification under vacuum to give ethyl lactatc Conforming with food sanitation check. The rasidue could be recycled directly. Some factors affection reaction such as temperature, moles ratio of reactants, flow rate and height of resin bed were studied. Under our optimum conditions the total yield was over 80%.更多还原