UN METODO DE PREPARAR UNA SOLUCION ESTABLE DE ACIDO DIETILENTRIAMIPENTA (METILENFOSFONICO)

摘要

The stability of aqueous solutions of diethylene triamine penta (methylene phosphonic) acid, comprising at lest 20% by weight of active material, is improved if the acid is partially neutralised. The major part e.g. 55 to 85% by weight of the acid is preferably diethylenetriaminepenta (methylenephosphonic) acid itself. The preferred products are derived by neutralising from 10 to 30% of the replaceable hydrogen with sodium potassium or ammonium ions. The salt solutions are less corrosive than known products to which mineral acid has been added.