Patent ID: 6570011
Filing Date: 2003-05-27
Classification: C07D,G03C

Abstract:
A process for the preparation of a stabilized aqueous alkali metal-2-hydroxy-4,6-dichloro-s-triazine solution, wherein(a) providing at least one of an aqueous alkali hydrogencarbonate or an aqucous acetone solution as a starting solution; (b) adding cyanuric chloride and an alkali lye to said starting solution under such conditions that the temperature does not rise above 25Â° C. and the pH does not drop below 5.5; (c) adding an alkali salt of C10-C20 alkyl sulfate if in step (a) said starting solution is an alkali hydrogencarbonate containing solution, or adding an alkali hydrogencarbonate if in step (a) said starting solution is an exclusively aqueous acetone solution; (d) adding at least one stabilizer selected from the group consisting of an alkali borate, an alkali (hydrogen)phosphate and an alkali hexacyanoferrate (II); and (e) if necessary, adjusting the pH to the desired value with an acid.