C - Chemistry – Metallurgy – 07 – F
Patent
C - Chemistry, Metallurgy
07
F
260/500, 260/501
C07F 9/38 (2006.01) C02F 5/14 (2006.01)
Patent
CA 1231963
A B S T R A C T 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.
450424
Hargreaves Roger G.
Jones Trevor E.
Albright & Wilson Limited
Sim & Mcburney
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