Patent ID: 9464030
Filing Date: 2016-10-11
CPC Classification: C07C,C08G

Claim Text:
1. A process for making nitrogen containing compounds, comprising: (a) providing a clarified DAS-containing fermentation broth; (b) distilling the broth to form an overhead that comprises water and ammonia, and a liquid bottoms that comprises MAS, at least some DAS, and at least about 20 wt % water; (c) cooling and/or evaporating the bottoms, and optionally adding an antisolvent to the bottoms, to attain a temperature and composition sufficient to cause the bottoms to separate into a DAS-containing liquid portion and a MAS-containing solid portion that is substantially free of DAS; (d) separating at least part of the solid portion from the liquid portion; (e) contacting the solid portion with hydrogen and optionally an ammonia source in the presence of at least one hydrogenation catalyst to produce DAB; and recovering the DAB.