申请人:PFW (NEDERLAND) B.V.
公开号:EP0241094A1
公开(公告)日:1987-10-14
The invention relates to a process for the separation of L-leucine and L-isoleucine. The process is carried out by subjecting a mixture of leucine ester, and isoleucine ester (or a mixture of leucine ester, isoleucine ester and valine ester) to an esterase catalyzed hydrolysis resulting in a selective hydrolysis of the leucine ester. The pure L-leucine can be isolated from the reaction mixture by first removing the non-hydrolyzed esters by extraction with an organic solvent and then crystallizing the L-leucine at its isoelectric point. The recovered L-isoleucine ester is purified by distillation (if necessary), and hydrolyzed go yield pure crystalline L-isoleucine.
本发明涉及一种分离 L-亮氨酸和 L-异亮氨酸的工艺。该工艺是将亮氨酸酯和异亮氨酸酯的混合物(或亮氨酸酯、异亮氨酸酯和缬氨酸酯的混合物)在酯酶催化下进行水解,从而选择性地水解亮氨酸酯。首先用有机溶剂萃取除去未水解的酯,然后在等电点处结晶 L-亮氨酸,即可从反应混合物中分离出纯净的 L-亮氨酸。回收的 L-异亮氨酸酯可通过蒸馏(如有必要)进行提纯,然后水解得到纯净的 L-异亮氨酸结晶。