Continuous isothermal process for preparing mononitrotoluenes

US6583327B2 · kind B2 · utility

Assignee

• BAYER HEALTHCARE LLC · DE

Inventors

• Ralf Demuth · Hilden, DE
• Frank Dobert · Earlton, US
• Harald Petersen · Dormagen, DE
• Georg Ronge · Mülheim an der Ruhr, DE
• Hans-Martin Weber · Leverkusen, DE
• Thomas Wurminghausen · Leverkusen, DE
• Eberhard Zirngiebl

Key dates

• Filing date: Oct 26, 2001
• Grant date: Jun 24, 2003
• Expiry date: Oct 26, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C201/08
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

The present invention relates to a process for the continuous isothermal preparation of mononitrotoluenes with concentration of the resultant waste sulfuric acid and recycling of the concentrated waste sulfuric acid to the process.