The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 10, 2013
Filed:
Dec. 13, 2010
Ruediger Fritz, Bernsdorf, DE;
Renate Hempel, Ruhland, DE;
Michael Zoellinger, Salach, DE;
Anne-kathrin Merten, Lauchhammer, DE;
Doris Zschieschang, Guteborn, DE;
Ina Homann, Senftenberg, DE;
Annett Gersdorf, Hermsdorf, DE;
Holger Allardt, Schwarzheide, DE;
Reiner Reetz, Schwarzheide, DE;
Elvira Flegel, Bernsdorf, DE;
Ruediger Fritz, Bernsdorf, DE;
Renate Hempel, Ruhland, DE;
Michael Zoellinger, Salach, DE;
Anne-Kathrin Merten, Lauchhammer, DE;
Doris Zschieschang, Guteborn, DE;
Ina Homann, Senftenberg, DE;
Annett Gersdorf, Hermsdorf, DE;
Holger Allardt, Schwarzheide, DE;
Reiner Reetz, Schwarzheide, DE;
Elvira Flegel, Bernsdorf, DE;
BASF SE, Ludwigshafen, DE;
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