Processes for producing monoammonium adipate and conversion of monoammonium adipate to adipic acid
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United States of America Patent
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Nov 25, 2014
Grant Date -
Nov 3, 2011
app pub date -
Apr 14, 2011
filing date -
Apr 30, 2010
priority date (Note) -
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Abstract
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.
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