Patent · US Expired

Process for reducing dissolution time in the production and/or coating of sodium percarbonate

US5714201A · kind A · utility

6Cited by

1References

12Claims

0Family size

Assignee

Degussa AG · DE

Inventors

Martin Bewersdorf · Gelnhausen, DE
Birgit Bertsch-Frank · Rheinfelden (Baden), DE
Wolfgang Lortz · Wächtersbach, DE

Key dates

Filing date	Sep 13, 1996
Grant date	Feb 3, 1998
Priority date	—
Expiry date	Sep 13, 2016

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC01B15/106
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

A process for reducing dissolution time in the production of sodium percarbonate particles containing an alkali metal silicate as stabilizer by fluidized bed spray granulation and/or by coating sodium percarbonate particles with a coating containing an alkali metal silicate, wherein a solution containing alkali metal silicate is sprayed during production and/or coating which contains alkali metal silicate having a modulus in the range from less than 3 to greater than 1. Sodium percarbonate produced by fluidized bed spray granulation is distinguished by elevated Oa stability and short dissolution times and may thus readily be used in detergents and cleaning products containing silicate builders.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.