Title:
PROCESS FOR PREPARATION OF 2-NAPHTHOL-3,6_DISULFONIC ACID SALTS
Document Type and Number:
Japanese Patent JPS5233661
Kind Code:
A
Abstract:
PURPOSE: The title compounds, useful as intermediates of dyes and coloring materials for food additives, and useful as reagents for sensitized papers, are prepared in high yield with reusing the sulfonic residue in the reaction.
Inventors:
OKABE HIROMICHI
UENO YASUMASA
UENO YASUMASA
Application Number:
JP10974275A
Publication Date:
March 14, 1977
Filing Date:
September 09, 1975
Export Citation:
Assignee:
SUMITOMO CHEMICAL CO
International Classes:
C07C309/43; C07C67/00; C07C301/00; C07C303/06; C07C303/32; (IPC1-7): C07C143/48