Patent ID: 7402695
Filing Date: 2008-07-22
Classification: C07C,C12P

Abstract:
1. A method for separately collecting an optically active amino acid amide and an optically active amino acid from an aqueous solution containing the optically active amino acid amide and the optically active amino acid together with at least one member selected from the group consisting of an acid, a base and a salt, which comprises: a neutralization step of neutralizing an acid or a base when said aqueous solution contains the acidor the base, a desalting step of removing the salt contained in said aqueous solution and/or formed in said neutralization step, and a step of collecting the optically active amino acid amide and the optically active amino acid separately from each other from said aqueous solution which has been desalted in said desalting step, by a process which takes advantage of a difference in solubility between said two components in an organic solvent.