Process for improving the storage stability of alkali persalts
AssigneePeroxid-Chemie GmbH
InventorsHelmut Dillenburg, Werner Doetsch, Rudolf Siegel
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Abstract
A process for improving the storage behavior of alkali persalts in particularly alkali percarbonates, by preparing a granulate composition therefore is disclosed. The process comprises the steps of: (a) granulating an alkali persalt, wherein the alkali cation is an alkali metal cation or ammonium and which is selected from the group consisting of solid addition-products of an alkali salt with hydrogen peroxide and alkali salts of peroxo-acids in the presence of a sodium phosphate which is selected of sodium polyphosphates and sodium phyrophosphate and of water, and (b) drying the resulting granulate.
Claims22
A process for preparing a storage-stable granulate formulation of alkali persalts which comprises the steps of
- (a) granulating a solid alkali persalt, wherein the alkali cation is an alkali metal cation or ammonium and which is selected from the group consisting of solid addition-products of an alkali salt with hydrogen-peroxide and alkali salts of peroxo-acids in the presence of a sodium phosphate which is selected from the group consisting of sodium polyphosphates and sodium pyrophosphate and of water to obtain a granulate comprising granulate particles containing fully hydrated sodium phosphate adhered to solid alkali persalt particles, and
- (b) drying the resulting granulate.
Dependencies are inferred from the claim text.