| abstract |
The invention discloses a method for purifying caprolactam hydrolyzate. The caprolactam hydrolyzate is passed into the feeding chamber of the bipolar membrane electrodialysis device, and the chloride ions or sodium ions in the hydrolyzate enter the acid chamber or alkali chamber under the action of a direct current electric field, and are finally removed to realize purification. The method can avoid the use of acid or alkali, reduce the use of chemical agents, realize the regeneration and recycling of acid or alkali, and is a clean production process. |