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:
Aug. 24, 2010
Filed:
Dec. 08, 2008
Applicants:
Andreas Rausch, Neuss, DE;
Thomas Knauf, Dormagen, DE;
Jeffrey Bolton, Moundsville, WV (US);
Alexandre Racoes, Krefeld, DE;
Inventors:
Andreas Rausch, Neuss, DE;
Thomas Knauf, Dormagen, DE;
Jeffrey Bolton, Moundsville, WV (US);
Alexandre Racoes, Krefeld, DE;
Assignee:
Bayer MaterialScience AG, Leverkusen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 205/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
This invention relates to a process for the continuous preparation of nitrobenzene. This process comprises the adiabatic nitration of benzene with a mixture of sulfuric acid and nitric acid, in which the sum of the concentrations in the reaction zone of the metal ions which form sparingly soluble metal sulfates is less than 900 mg/l, based on the volume of the aqueous phase which contains sulfuric acid.