method for the separation of a salt of an aromatic sulphonic acid and dl - serine in optically active enantio lakes and the win of the optically active enantiome run of the serine.

摘要

A supersaturated solution of DL-serine m-xylene-4-sulfonate is prepared. The solution is seeded with crystals of one of the optically active enantiomers of said DL-serine m-xylene-4-sulfonate before and/or after the solution reaches the point of supersaturation. Crystallization is permitted to take place and the resultant crystals are recovered. The resulting enantiomer is useful as an intermediate in preparing optically active serine.