Work-up of aqueous mother liquors containing hydrochloric acid,

Details Work-up of aqueous mother liquors containing hydrochloric acid, Work-up of aqueous mother liquors containing hydrochloric acid,

1990-12-20

1992-06-23

Langel, Wayne

Chemistry of inorganic compounds

Nitrogen or compound thereof

Oxygen containing

423387, 564267, C01B 21093, C07C24904

Patent

active

051241382

ABSTRACT:
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.

REFERENCES:
patent: 3701809 (1972-10-01), De Rooij et al.
patent: 3720758 (1973-03-01), De Rooij et al.

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