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:
Jan. 12, 1982
Filed:
May. 01, 1980
Applicant:
Inventors:
Assignee:
Josef Meissner GmbH & Co., Cologne, DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
423345 ; 260688 ; 568927 ; 568932 ; 568937 ; 568939 ;
Abstract
In the nitration of a volatile aromatic compound wherein the compound is reacted with a liquid nitrating agent thereby to effect nitration and to produce a waste gas containing some of the aromatic compound, nitrogen oxides and nitric acid, the improvement which comprises contacting the waste gas with fresh nitrating agent thereby to remove the aromatic compound from the gas into the nitrating agent, and thereafter using such nitrating agent to effect subsequent nitration.