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:
Oct. 04, 1983
Filed:
May. 16, 1979
Applicant:
Inventors:
Akira Fukasawa, Toyonaka, JP;
Masakatsu Yoshimura, Sakai, JP;
Tatsuo Kaneoya, Minoo, JP;
Kenji Takahashi, Niihama, JP;
Assignee:
Sumitomo Chemical Company, Limited, Osaka, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C07C / ;
U.S. Cl.
CPC ...
260378 ;
Abstract
A process for producing an aminoanthraquinone, which comprises feeding of a nitroanthraquinone and an alkali sulfide continuously into a reaction zone kept at a temperature of from 80.degree. to 140.degree. C., the alkali sulfide being used in an amount of 1.6 or more times the mole number of the nitro group, and withdrawing the reaction product continuously or intermittently from the reaction zone; and an aminoanthraquinone obtained by the above process which is one of the most important intermediates of anthraquinone dyes.