Degussa - Huls Ag

Hans Peter Krimmer

Peter Werle

Manfred Schmidt

Martin Trageser

Josef Leutner

Christoph Klatte

Kurt Kunz

J&uuml;rgen Ohlemacher

A method for producing alkali metal salts or alkaline earth metal salts of 2,4-dicloro-6-hydroxy-s-triazine, especially the sodium salt, by reacting cyanuric chloride with an alkali hydroxide or alkaline earth hydroxide. 1 to 2.5 Equivalents of alkali hydroxide or alkaline earth hydroxide per mole cyanuric chloride in the form of an aqueous solution or suspension are placed in a receiver and cyanuric chloride in powder form or in the form of an aqueous suspension is added while maintaining a pH in the range of 9.5 to 14 and cooling. If less than a stoichiometric amount is added to the receiver, the remaining amount of alkali hydroxide or alkaline earth hydroxide is added during and/or after the addition of cyanide chloride, while maintaining the pH. The method can be carried out on an industrial scale and formation of the salt of monochlorodihydroxytriazine is largely avoided.

Method of producing alkali metal salts or alkaline earth metal salts of 2,4-dichloro-6-hydroxy-s-triazine

Acrolein-releasing emulsion homopolymers release acrolein in aqueous systems. They are produced by adding acrolein, at least 95% by weight pure, to a solution of an alkali hydroxide, with the temperature not exceeding 25.degree. C. during the addition, and then adjusting the pH to 5 to 7 by adding a mineral acid.

Acrolein-releasing emulsion homopolymers

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Dietzenbach, Germany

Hans Peter Krimmer