Extraction of ketazine solutions

摘要

Process for extracting aqueous ketazine solutions which is carried out using an aqueous ketazine solution having a salt content of 5 to 27% by weight and an ammonia content of 0 to 28% by weight to extract at temperatures of 50 to 120° C., which is characterized in that the ketazine solution to be extracted has a molar excess of 50 to 200% of ketone based on the ketazine to be extracted, and that an aliphatic hydrocarbon extractant is used which has a boiling point of 150 to 300° C. at atmospheric pressure.