| abstract |
A method of obtaining a D, L-lysine base, including ion-exchange sorption of lysine from an aqueous solution of D, L-lysine hydrochloric on a sulfonic cation exchanger, followed by desorption and obtaining an eluate, concentrating it and isolating the target product. In order to increase the yield and improve the quality of the target product, the concentration is carried out in a stream of pure nitrogen until the volume is reduced by 10-20 times, and the isolation is carried out with a mixture of ethyl alcohol and ether in a ratio of 10: 1-7: 1. |