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. 26, 2017
Filed:
Apr. 14, 2014
Applicant:
Covestro Deutschland Ag, Leverkusen, DE;
Inventors:
Thomas Knauf, Dormagen, DE;
Antoni Mairata, Dusseldorf, DE;
Erik Sluyts, Brasschaat, BE;
Jan Van Tricht, Ekeren, BE;
Assignee:
Covestro Deutschland AG, Leverkusen, DE;
Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F 9/00 (2006.01); C02F 1/02 (2006.01); C02F 1/20 (2006.01); C07C 201/08 (2006.01); C07C 201/16 (2006.01); C07C 209/36 (2006.01); C02F 1/04 (2006.01); C02F 101/32 (2006.01); C02F 101/38 (2006.01); C02F 103/18 (2006.01);
U.S. Cl.
CPC ...
C02F 9/00 (2013.01); C02F 1/025 (2013.01); C02F 1/20 (2013.01); C07C 201/08 (2013.01); C07C 201/16 (2013.01); C07C 209/36 (2013.01); C02F 1/04 (2013.01); C02F 2101/322 (2013.01); C02F 2101/38 (2013.01); C02F 2103/18 (2013.01); C02F 2209/06 (2013.01); C02F 2301/046 (2013.01);
Abstract
The invention relates to a process for working up alkaline waste water which is formed during washing of crude nitrobenzene obtained by nitration of benzene, wherein