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. 20, 1987
Filed:
Dec. 12, 1984
Applicant:
Inventors:
Rudolf Heinrich, Kelkheim, DE;
Konrad Albrecht, Kelkheim, DE;
Assignee:
Hoechst Aktiengesellschat, Frankfurt am Main, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
564437 ; 564497 ; 564441 ; 564411 ; 564414 ;
Abstract
Processes for the preparation of nitrosamine-free N,N-disubstituted nitroaromatic amines by degradation of their nitrosamine components formed during their preparation, and by stabilization of the products against renewed formation of nitrosamines, by treating the amines in liquid or molten form with a sulfonic acid, where necessary in the presence of inert organic solvents or diluents.