PROCESS FOR REMOVING ORGANIC AMINES AND ACIDS FROM A WASTEWATER STREAM FROM AN MDA OR PMDA MANUFACTURING FACILITY

摘要

Organic amines and phenolic compounds are removed from a wastewater solution from an aniline condensation process by contacting the solution with activated carbon. Phenolic compounds and other organic acids are removed by treating the wastewater solution with activated carbon while the wastewater solution is at a pH of 5 or less. Organic amines are removed by treating the wastewater solution with activated carbon while the wastewater solution is at a pH of 8 or more. The process can efficiently remove both organic amines and organic acids to very low levels.