Patent ID: 6331626
Filing Date: 2001-12-18
Classification: C07D,C09B,D06L,Y10S

Abstract:
A process for the production of the di-sodium salt of the 4,4'-di-triazinylamino-2,2'-di-sulfostilbene compound having the formula: ##STR3##in which M and M.sub.1 are sodium and x represents 1 to 6 and possessing the (A) hydrate form characterized by an X-ray diffraction pattern which shows absorptions in the 2.O slashed.-area between 1.degree. and 30.degree. as follows:4.6 (very strong), 6.1 (very weak), 8.0 (very weak), 10.5 (very weak), 12.1 (medium), 12.7 (strong), 13.8 (medium), 14.4 (very weak), 15.0 (medium), 15.9 (medium), 16.6 (weak), 17.8 (weak), 18.3 (very weak), 18.7 (very weak), 19.0 (very weak), 20.1 (medium), 21.0 (weak), 21.8 (medium), 22.9 (medium), 23.6 (medium), 24.7 (weak), 25.7 (medium), 27.4 (weak), 28.0 (weak), 29.5 (very weak),by successively reacting cyanuric chloride with 4,4'-diaminostilbene disulphonic acid di-sodium salt, aniline and diethanolamine, adjusting the pH of the mixture to 9.0 to 9.5 with concentrated sodium hydroxide solution and evaporating the mixture to dryness.