A process for making MAA from a clarified DAA-containmg fefme.ntation broth includes (a) distilling: the broth to form an overhead thai includes water and ammonia, and a liquid bottoms, that includes MAA, at least some DAA, and at least about 20 wt% water; (fa) cooling "the bottoms to a temperature sufficient to cause the bottoms to separate into a DAA-containing liquid portion in contact with a MAA-contaraing 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的发酵液中制备MAA的过程包括(a)蒸馏:将发酵液蒸馏成一个包括
水和
氨的顶部,以及一个包括MAA、至少一些
DAA和至少约20wt%
水的液体底部;(b)将底部冷却至足以使底部分离成与MAA含量固体部分接触的含有
DAA的液体部分,该固体部分基本上不含
DAA;(c)分离固体部分和液体部分;和(d)回收固体部分。