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. 24, 1987
Filed:
Jun. 29, 1984
Applicant:
Inventors:
Richard E Bockrath, Wilmington, DE (US);
Kirby Kirksey, Newark, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C02F / ; C02F / ;
U.S. Cl.
CPC ...
210754 ; 210758 ; 210909 ;
Abstract
A process for destroying nitrated aromatics, e.g., the nitrophenol byproducts produced in the nitration of benzene to dinitrobenzene, is disclosed. The process involves treatment of an aqueous solution of the nitrated aromatics with iron and hydrochloric acid with or without ferric chloride using 0.2 to 7 molecular equivalents of finely divided iron based on the organic nitro groups present. The reaction is carried out at 0.degree. to 100.degree. C. and pH 1.5-3.