METHOD OF SEPARATING L-TRYPTOPHAN

摘要

A L-tryptophan-containing reaction mixture produced by a reaction utilizing a microorganism is adjusted to pH 2 to 5 with a mineral acid and then heated whereby the microorganism contained in the reaction mixture is flocculated, and removed by either (1) filtering, or (2) adding an alkali to convert L-tryptophan to its alkali salt and then filtering. L-tryptophan of high purity can be obtained.