METHOD FOR PRODUCING OF L-LYSINE

摘要

A process for preparing L-lysine by continuous concn. and crystallization comprises: (a) adjusting the culture broth contg. lysine to pH 2.5 with H2SO4; (b) absorbing it into cation exchange resin, D iason SK-1B resin; (c) washing the resin with desalting water; (d) dissoluting it with 2N-ammonium hydroxide to obtain the soln. contg. high density lysine; (e) decoloring the obtd. soln. and preconcentrating; (f) continous concentrating it and crystallizing to obtain the final product. The recovery rate of lysine from the culture broth is about 90%.