Acidic sludge adsorption of DNT wastewaters

US8529771B2 · kind B2 · utility

Assignee

• BASF SE

Inventors

• Ruediger Fritz · Bernsdorf, DE
• Renate Hempel · Ruhland, DE
• Michael Zoellinger · Eislingen/Fils, DE
• Anne-Kathrin Merten · Schwarzheide, DE
• Doris Zschieschang · Guteborn, DE
• Ina Homann · Senftenberg - Zły Komorow, DE
• Annett Gersdorf · Hermsdorf, DE
• Holger Allardt · Schwarzheide, DE
• Reiner Reetz · Schwarzheide, DE
• Elvira Flegel · Bernsdorf, DE

Key dates

• Filing date: Dec 13, 2010
• Grant date: Sep 10, 2013
• Expiry date: Dec 13, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C07C201/16
• WIPO field: Organic fine chemistry
• WIPO sector: Chemistry

Abstract

A process for working up alkaline process wastewater from the nitration of aromatic compounds to mono-, di- and trinitroaromatics, said alkaline process wastewater having a pH of 7.5 to 13, comprising the steps of