| abstract |
The invention relates to a novel method for the "dry" production of sodium percarbonate (dry process). Monohydrate crystal is reacted with a quasi-stoichiometric quantity of concentrated aqueous hydrogen peroxide solution, in relation to the quantity of active oxygen required in the sodium percarbonate. This method can be combined to great advantage with the subsequent compaction of the sodium percarbonate obtained. Sodium percarbonate products containing varying concentrations of active oxygen of at least 10 weight percent, but in particular with high active oxygen concentrations of above 14.5 weight percent, can be produced. The resulting sodium percarbonate products are characterized in that they have remarkably advantageous characteristic as regards dissolution rate, stability and compatibility with detergent base, and are superior to conventional sodium percarbonates obtained, for example, by a crystallisation process. The invention also relates to said percarbonate sodium products and detergent compounds containing same. |