Stabilized peracid solutions
AssigneeSolvay Interox Limited
InventorsAndrew Kevin Gray, Alun Pryce James
Life of this patent
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Abstract
The current invention relates to the stabilisation of peroxyacid solutions. There is provided a tin based stabiliser composition obtained by the ageing of an alkaline solution of a tin compound and a phosphorus containing compound. The stabiliser is particularly suitable for the stabilisation of non-equilibrium solutions of peroxyacids.
Claims26
A process for the stabilisation of an aqueous solution of a peroxyacid prepared from a plurality of components by means of the addition of an effective amount of a tin based stabiliser to said solution or to one or more of said components of said solution, wherein said stabiliser is prepared as a coloured solution, which is aged for a time sufficient to obtain its fading before said addition to said peroxyacid solution or to one or more of said components of said solution and to obtain a clear solution having no suspended solids.
A process for the stabilisation of an aqueous solution of a peroxyacid prepared from a plurality of components by means of the addition of an effective amount of a tin based stabiliser to said solution or to one or more of said components of said solution, wherein the stabiliser is prepared according to the steps of:
- a) preparing a solution containing a water soluble salt of a stannate with one or more water solution phosphorus containing salts;
- b) adjusting the pH of the solution to a pH in the range of 9 to 11.5;
- and
- c) ageing the solution for a period determined by the formula Time=y(2.3.sup.(100-T)/10) in which time is given in hours, y is the range of from 0.1 to 2, and T is the temperature at which the solution is aged, in Celsius, whereby color of the solution fades and a clear solution having no suspended solids is obtained.
Stabilised aqueous peroxyacid composition prepared from a plurality of components, said composition comprising an effective amount of a tin based stabiliser said stabiliser being prepared as a coloured solution which is aged for a time sufficient to obtain its fading before introduction into the peroxyacid solution or to one or more of said components thereof and to obtain a clear solution having no suspended solids.
Stabilised aqueous peroxyacid composition, prepared from a plurality of components, said composition comprising an effective amount of a tin based stabiliser which has been prepared prior to its introduction into the composition or into one or more of said components thereof by steps of:
- a) preparing a solution containing a water soluble salt of a stannate with one or more water solution phosphorus containing salts;
- b) adjusting the pH of the solution to a pH in the range of 9 to 11.5;
- and
- c) ageing the solution for a period determined by the formula Time=y(2.3.sup.(100-T)/10) in which time is given in hours, y is the range of from 0.1 to 2, and T is the temperature at which the solution is aged, in Celsius, whereby color of the solution fades and a clear solution having no suspended solids is obtained.
Dependencies are inferred from the claim text.