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:
Dec. 18, 2018
Filed:
Jun. 12, 2015
Applicants:
Noram International Limited, Dublin, IE;
Steven D. Buchi, Vancouver, CA;
Alfred A. Guenkel, Vancouver, CA;
Inventors:
Steven D. Buchi, Vancouver, CA;
Alfred A. Guenkel, Vancouver, CA;
Assignee:
NORAM INTERNATIONAL LIMITED, Dublin, IE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07C 201/16 (2006.01); C07C 205/06 (2006.01); C01C 1/10 (2006.01); C07C 205/17 (2006.01); C02F 1/20 (2006.01); C02F 3/02 (2006.01); C02F 1/34 (2006.01); C02F 101/34 (2006.01); C02F 101/38 (2006.01); C02F 103/36 (2006.01);
U.S. Cl.
CPC ...
C07C 201/16 (2013.01); C01C 1/10 (2013.01); C02F 1/20 (2013.01); C07C 205/06 (2013.01); C07C 205/17 (2013.01); C02F 3/02 (2013.01); C02F 2101/345 (2013.01); C02F 2101/38 (2013.01); C02F 2103/36 (2013.01); Y02W 10/15 (2015.05);
Abstract
A process for removing impurities from crude nitrated aromatic products obtained during the nitration of aromatic compounds. The nitrated aromatic products are purified by treatment with ammonia washing followed by caustic washing. The nitrophenolic-containing wash waters are treated to recover dissolved organics and ammonia, and the stripped ammonia-wash effluent is incinerated. Carbon dioxide, which can accumulate in the process, is purged to the caustic washer.