A process for making MAA from a clarified DAA-containing fermentation broth includes (a) distilling the broth to form an overhead that includes water and ammonia, and a liquid bottoms that includes MAA, at least some DAA, and at least about 20 wt % water; (b) cooling the bottoms to a temperature sufficient to cause the bottoms to separate into a DAA-containing liquid portion in contact with a MAA-containing solid portion that is substantially free of DAA; (c) separating the solid portion from the liquid portion; and (d) recovering the solid portion.
从含有澄清
DAA的发酵汁中制备MAA的过程包括(a)蒸馏汁以形成包括
水和
氨的顶部和包括MAA、至少一些
DAA和至少约20重量%
水的液体底部; (b)将底部冷却到足以使底部分离成为与MAA含量高且基本上不含
DAA的固体部分接触的含有
DAA的液体部分; (c)分离固体部分和液体部分; 和(d)回收固体部分。