Process for scrubbing dinitrotoluene

US9249083B2 · kind B2 · utility

Assignees

• BASF SE
• JOSEF MEISSNER GMBH & CO. KG · DE

Inventors

• Samuel Neto · Brussels, BE
• Ruediger Fritz · Bernsdorf, DE
• Renate Hempel · Ruhland, DE
• Holger Allardt · Schwarzheide, DE
• Barbara BECKER · Ludwigshafen am Rhein, DE
• Julia Leschinski · Mannheim, DE
• Sebastian Ahrens · Wiesloch, DE
• Heinrich Hermann · Cologne, DE
• Mirko Haendel · Neunkirchen, DE
• Juergen Poehlmann · Cologne, DE

Key dates

• Filing date: Apr 25, 2013
• Grant date: Feb 2, 2016
• Expiry date: Jan 23, 2034

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C201/06
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a process for scrubbing a crude mixture comprising dinitrotoluene, nitric acid, nitrogen oxides and sulfuric acid obtained in the nitration of toluene after the nitrating acid has been separated off, which comprises two scrubbing steps (SS-I) and (SS-II), wherein