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:
Aug. 11, 1981
Filed:
Jan. 14, 1980
Applicant:
Inventors:
Serge Y Delavarenne, Francheville le Haut, FR;
Bernard Dubreux, Francheville le Bas, FR;
Pierre Tellier, Sainte Foy les Lyon, FR;
Assignee:
Produits Chimiques Ugine Kuhlmann, Courbevoie, FR;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260369 ;
Abstract
A process is disclosed for the preparation of mononitro derivatives of 1,2,3,4-tetrahydro-anthraquinone from 1,4,4a,9a-tetrahydro-anthraquinone, in which a thermal pretreatment of the 1,4,4a,9a-tetrahydro-anthraquinone is carried out in the presence of a hydrogenation catalyst in an inert atmosphere and in the absence of oxidizing or reducing agents, the anthraquinone by-produced as well as the catalyst are separated and the mixture of 1,2,3,4-tetrahydro-9,10-anthracenediol and 1,2,3,4-tetrahydro-anthraquinone obtained is subjected to a nitration reaction.