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1. (WO1997019890) COATED SODIUM PERCARBONATE PARTICLES, PROCESS FOR THE PRODUCTION THEREOF AND USE THEREOF
Latest bibliographic data on file with the International Bureau   

Pub. No.: WO/1997/019890 International Application No.: PCT/EP1996/004986
Publication Date: 05.06.1997 International Filing Date: 14.11.1996
Chapter 2 Demand Filed: 26.05.1997
IPC:
C01B 15/10 (2006.01) ,C11D 3/02 (2006.01) ,C11D 3/39 (2006.01) ,C11D 17/00 (2006.01)
C CHEMISTRY; METALLURGY
01
INORGANIC CHEMISTRY
B
NON-METALLIC ELEMENTS; COMPOUNDS THEREOF
15
Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
055
Peroxyhydrates; Peroxyacids or salts thereof
10
containing carbon
C CHEMISTRY; METALLURGY
11
ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
D
DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
3
Other compounding ingredients of detergent compositions covered in group C11D1/101
02
Inorganic compounds
C CHEMISTRY; METALLURGY
11
ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
D
DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
3
Other compounding ingredients of detergent compositions covered in group C11D1/101
39
Organic or inorganic per-compounds
C CHEMISTRY; METALLURGY
11
ANIMAL OR VEGETABLE OILS, FATS, FATTY SUBSTANCES OR WAXES; FATTY ACIDS THEREFROM; DETERGENTS; CANDLES
D
DETERGENT COMPOSITIONS; USE OF SINGLE SUBSTANCES AS DETERGENTS; SOAP OR SOAP-MAKING; RESIN SOAPS; RECOVERY OF GLYCEROL
17
Detergent materials or soaps characterised by their shape or physical properties
Applicants:
DEGUSSA AKTIENGESELLSCHAFT [DE/DE]; Weissfrauenstrasse 9 D-60311 Frankfurt, DE
Inventors:
SCHÜTTE, Rüdiger; DE
BEWERSDORF, Martin; DE
KLASEN, Claas-Jürgen; DE
Priority Data:
195 44 293.828.11.1995DE
Title (EN) COATED SODIUM PERCARBONATE PARTICLES, PROCESS FOR THE PRODUCTION THEREOF AND USE THEREOF
(FR) PARTICULES ENROBEES DE PERCARBONATE DE SODIUM, PROCEDE POUR LES FABRIQUER ET LEUR UTILISATION
Abstract:
(EN) In order to increase active oxygen stability, sodium percarbonate is coated with single or multiple layers of various substances. Sodium percarbonate particles coated according to the invention consist of a core of sodium percarbonate fluidised bed spray granulate and sodium sulphate, which may be partially hydrated, as the sole constituent of a single coating layer. The particles according to the invention exhibit both elevated active oxygen stability and very good ensilability. The coating layer is applied by spraying an aqueous Na2SO4 solution onto the particles to be coated, which were themselves produced by fluidised bed spray granulation, in a fluidised bed and vaporising water at a fluidised bed temperature of 35 to 100 °C.
(FR) Pour augmenter la stabilité de l'oxygène actif, le percarbonate de sodium est enrobé par une ou plusieurs couches de différentes substances. Les particules enrobées de percarbonate de sodium ont un noyau en percarbonate de sodium obtenu par un procédé de granulation en lit fluidisé. L'enrobage est constitué de sulfate de sodium qui peut être partiellement hydraté et qui constitue le seul composant de l'unique couche d'enrobage. L'oxygène actif de ces particules est très stable et ces particules se prêtent bien à un stockage en silos. La couche d'enrobage est appliquée par pulvérisation d'une solution aqueuse de Na2SO4 sur les particules à enrober, qui elles-mêmes sont obtenues par une granulation faisant appel à une vaporisation d'eau, dans un lit fluidisé maintenu à 35 - 100 °C.
Designated States: CA, CN, CZ, HU, IL, JP, KR, MX, NO, PL, RU, SI, SK
European Patent Office (EPO) (AT, BE, CH, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)