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:
Jul. 06, 1976
Filed:
Oct. 25, 1972
Applicant:
Inventor:
Istvan Szekely, Basel, CH;
Assignee:
Ciba-Geigy AG, Basel, CH;
Primary Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260369 ; 260383 ; 260384 ;
Abstract
The invention relates to a process for the manufacture of anthraquinones which are mononitrated in the .alpha.-position, especially 1-nitroanthraquinone, wherein an anthraquinone which possesses at least 1 free .alpha.-position and is optionally substituted in the other .alpha.-position with halogen, preferably chlorine, or with hydroxyl groups, but especially the unsubstituted anthraquinone, is nitrated with concentrated nitric acid without further additives adiabatically, or at temperature above 40.degree.C isothermically, and optionally under pressure.