Process for the separation of L-leucine and L-isoleucine
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.