Recirculation and disposal of aqueous catalyst solutions in amine catalytic processes

US9816703B2 · kind B2 · utility

Assignee

• Evonik Röhm GmbH · DE

Inventors

• Steffen Krill · Mühltal, DE
• Torsten Balduf · Pfungstadt, DE
• Rudolf Burghardt · Darmstadt, DE
• Gerhard Koelbl · Gernsheim, DE
• Reed Zhao · Shanghai, CN

Key dates

• Filing date: Jul 15, 2014
• Grant date: Nov 14, 2017
• Expiry date: Jul 15, 2034

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F23G7/065
• WIPO field: Environmental technology
• WIPO sector: Chemistry

Abstract

The present invention relates to the oxidative combustion of amine-containing wastewaters, especially in a process for preparing methacrolein. Methacrolein is used in chemical synthesis particularly as an intermediate for preparation of methacrylic acid, methyl methacrylate, or else of active ingredients, odorants or flavorings. More particularly, the present invention relates to an oxidative combustion of the amine-containing wastewaters with only low nitrogen oxide formation.