申请人:MULLEN Brian D.
公开号:US20120123147A1
公开(公告)日:2012-05-17
Ketocarboxylic acids such as levulinic acid can be efficiently purified in high yield by esterification with a hydrocarbon polyol to the corresponding polyketocarboxylic ester, which can be readily purified, for example recrystallized. After purification, the ketocarboxylic ester can be hydrolyzed to provide pure ketocarboxylic acid, or a salt thereof, after removal of the esterifying hydrocarbon polyol, or used for other synthetic transformations. Advantageously, the polyketocarboxylic esters, ketocarboxylic acids, and salts thereof produced by this method are obtained in high purity.
酮羧酸(如丙酮酸)可以通过与碳氢化合物多元醇酯化来高产率高效纯化,得到相应的多羟基酮羧酸酯,该酯可容易地纯化,例如再结晶。纯化后,酮羧酸酯可以水解以提供纯净的酮羧酸或其盐,在去除酯化碳氢化合物多元醇后,或用于其他合成转化。优点是,通过这种方法生产的多羟基酮羧酸酯、酮羧酸和盐具有高纯度。