WORK-UP OF AQUEOUS MOTHER LIQUORS CONTAINING HYDROCHLORIC ACID, SULFURIC ACID AND THEIR HYDROXYL-AMMONIUM AND AMMONIUM SALTS

摘要

A process for working up aqueous mother liquors containing hydrochloric acid, sulfuric acid and their hydroxylammonium and ammonium salts, entails the mother liquors being intimately mixed with an excess of cyclohexanone based on the content of hydroxylammonium salts, while maintaining a pH of from 3 to 5.5 by adding alkali metal hydroxide solutions, and the cyclohexanone phase which contains cyclohexanone oxime being removed and washed with water until essentially free of chloride.