Process for the production of nitrobenzene

US7326816B2 · kind B2 · utility

Assignee

• Bayer MaterialScience AG · DE

Inventors

• Thomas Knauf · Dormagen, DE
• Franz-Ulrich Von Gehlen · Krefeld, DE
• Jörg Schmiedler · Duisburg, DE
• Klaus Pilarczyk · Krefeld, DE
• Peter Drinda · Krefeld, DE

Key dates

• Filing date: Jan 30, 2007
• Grant date: Feb 5, 2008
• Expiry date: Jan 30, 2027

Classification

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

Abstract

Nitrobenzene is produced and then purified using an acidic wash, an alkaline wash, a neutral wash, subjecting a dispersion formed in the neutral wash to electrophoresis to separate water and benzene from the nitrobenzene and recover purified nitrobenzene.