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:
Nov. 11, 2008
Filed:
Sep. 18, 2004
Johannes Buettner, Ruhland, DE;
Holger Allardt, Schwarzheide, DE;
Reinhard Tonder, Klettwitz, DE;
Reiner Reetz, Schwarzheide, DE;
Michael Reichelt, Ruhland, DE;
Johannes Buettner, Ruhland, DE;
Holger Allardt, Schwarzheide, DE;
Reinhard Tonder, Klettwitz, DE;
Reiner Reetz, Schwarzheide, DE;
Michael Reichelt, Ruhland, DE;
BASF SE, Ludwigshafen, DE;
Abstract
The invention provides a process for removing nitrocresols from wastewater of mononitrotoluene preparation, which comprises acidifying the alkaline wastewater of mononitrotoluene preparation with acids to a pH of at most 3 and treating the nitrocresols with an extractant. The invention further provides the preparation of dinitrotoluene by use of the nitrocresol-containing extracts as a feedstock.