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:
Feb. 05, 2008
Filed:
Jan. 30, 2007
Applicants:
Thomas Knauf, Dormagen, DE;
Franz-ulrich Von Gehlen, Krefeld, DE;
Jörg Schmiedler, Shanghai, CN;
Klaus Pilarczyk, Krefeld, DE;
Peter Drinda, Krefeld, DE;
Inventors:
Thomas Knauf, Dormagen, DE;
Franz-Ulrich Von Gehlen, Krefeld, DE;
Jörg Schmiedler, Shanghai, CN;
Klaus Pilarczyk, Krefeld, DE;
Peter Drinda, Krefeld, DE;
Assignee:
Bayer MaterialScience AG, Leverkusen, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C 205/00 (2006.01); B01D 57/02 (2006.01);
U.S. Cl.
CPC ...
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.