Title:
PREPARATION OF 8-AMINO-1-NAPHTHOL-3,6-DISULFONIC ACID
Document Type and Number:
Japanese Patent JPS52156844
Kind Code:
A
Abstract:
PURPOSE: To prepare the title compound, useful as a intermediate of dyes and pigments, by the reduction and subsequent alkali fusion of a mixture containing 1-nitronaphthaline-3,6,8-trisulfonic acid, followed by precipitation with an acid.
Inventors:
KODERA NOHAO
OKABE HIROMICHI
KORENAGA HIROSHI
OKABE HIROMICHI
KORENAGA HIROSHI
Application Number:
JP7372376A
Publication Date:
December 27, 1977
Filing Date:
June 21, 1976
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C07C309/50; C07C67/00; C07C301/00; C07C303/22; C07C303/32; C09B29/30; C07C; (IPC1-7): C07C143/42