| abstract |
The invention discloses a method for extracting and purifying dibasic acid amine salt solution. The amine salt solution is passed into the desalination chamber of the electrodialysis device, and the purified dibasic acid amine salt solution is obtained from the concentration chamber of the electrodialysis device. The present invention can effectively reduce the amount of proteins, carbohydrates, etc., and can reduce the chromaticity, and the polymer obtained by the polymerization of the obtained product has the same performance as that of the existing polymer-grade dibasic acid and the product obtained by polymerizing the dibasic acid. The performance is comparable, and on the basis of ensuring the quality of the final product, the pre-extraction and purification steps are greatly reduced, and energy, labor and costs are saved. |