Patent ID: 8895779
Filing Date: 2014-11-25
Classification: C07C

Abstract:
1. A process for obtaining monoammonium adipate (MAA) from an aqueous clarified diammonium adipate (DAA)-containing fermentation broth comprising: (a) providing an aqueous clarified diammonium adipate (DAA)-containing fermentation broth; (b) distilling the broth to form an overhead that comprises water and ammonia, and a liquid bottoms that comprises MAA, at least some DAA, and at least 20 wt. % water; (c) cooling, evaporating or evaporative cooling 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 DAA-containing liquid portion and a MAA-containing solid portion that is substantially free of DAA; (d) separating the solid portion from the liquid portion; and (e) recovering the solid portion.