Title:
ISORATING METHOD OF DINITROANTHRAQUINONE CONTAINING LARGE AMOUNT OF ALPHA*ALPHAADINITRO COMPOUND
Document Type and Number:
Japanese Patent JPS51146454
Kind Code:
A
Abstract:
A process for the isolation of mixtures of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone which have a high content of alpha , alpha '-dinitroanthraquinones by heating a suspension of the crude dinitroanthraquinone mixture in certain organic liquids at from 60 DEG to 200 DEG C until solution equilibrium has been set up, and separating the undissolved material from the solution. The undissolved material contains more than 90% and as a rule more than 95% by weight of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone. The pure mixture of 1,5-dinitroanthraquinone and 1,8-dinitroanthraquinone may be used for the manufacture of dyes.
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Inventors:
HAINTSU AIRINGUSUFUERUTO
DEIITORITSUHI RATSUHA
DEIITORITSUHI RATSUHA
Application Number:
JP6416576A
Publication Date:
December 16, 1976
Filing Date:
June 03, 1976
Export Citation:
Assignee:
BASF AG
International Classes:
C07C205/47; C07C67/00; C07C201/00; C09B1/00; (IPC1-7): C07C79/37