Patent Number: 6,254,789

Title: Method for treating aqueous solutions comprising acids and nitrated compounds

Abstract: The invention concerns a method for treating an aqueous solution derived from sluicing of crude mononitrated or dinitrated aromatic compounds obtained by nitration of the corresponding aromatic compounds, consisting in: (a) contacting said aqueous solution with said aromatic compound thereby obtaining an aqueous phase and an organic phase; (b) recycling said organic phase in the nitration process; (c) distilling said aqueous phase; (d) recycling the resulting concentrated acid solution in the nitration process; (e) recycling or eliminating the recuperated water after distillation.

Inventors: Marion; Philippe (Vernaison, FR), Le Bris; Louis (Lyons, FR), Berrod; Gerard (Villeurbanne, FR), Dovergne; Georges (Le Pont de Claix, FR), Perrona; Philippe (Charly, FR)

Assignee: Rhodia Chimie

International Classification: C07C 201/00 (20060101); C07C 201/16 (20060101); C02F 001/04 ()

Expiration Date: 07/03/2018