Process for improving the storage stability of alkali persalts

US4179394A · kind A · utility

Assignee

• Peroxid-Chemie GmbH · DE

Inventors

• Helmut Dillenburg · Rheinberg, DE
• Werner Doetsch · Homborn, DE
• Rudolf Siegel · Neuwied, DE

Key dates

• Filing date: Jan 10, 1978
• Grant date: Dec 18, 1979
• Expiry date: Jan 10, 1998

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C11D3/3937
• WIPO field: Materials, metallurgy
• WIPO sector: Chemistry

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: PA1 (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 PA1 (b) drying the resulting granulate.