Patent ID: 9650326
Date: 2017-05-16
CPC Classifications: C07C

Claim:
1. A process for treating a fermentation broth reaction solution containing a long chain dicarboxylate, microbial cells and residual alkanes or fatty acids to isolate a substantially pure long chain dicarboxylic acid, characterized by comprising: acidifying the fermentation broth reaction solution to convert the long chain dicarboxylate into a long chain dicarboxylic acid, adding an extractant to the fermentation broth reaction solution containing the long chain dicarboxylic acid, wherein the extractant is selected from the group consisting of C separating a phase rich in the long chain dicarboxylic acid from the fermentation broth reaction solution, and isolating the substantially pure long chain dicarboxylic acid from the separated phase, wherein the substantially pure long chain dicarboxylic acid comprises at least 98.5% long chain dicarboxylic acid, and wherein the extraction is performed at a temperature in the range from room temperature to the temperature below the boiling point of the phase rich in the long chain dicarboxylic acid and below 100° C.