METHOD FOR PRODUCING GRANULAR COATED SODIUM PERCARBONATE AND PRODUCT OBTAINED ACCORDING TO SAID METHOD

The invention relates to a process for the preparation of coated granular sodium percarbonate having a low TAM value. The preparation is carried out by fluidized-bed spray granulation at a temperature TG in the range from 45 to 75° C., and the coating is effected by the spray application of an aqueo...

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Bibliographic Details
Main Authors LATTICH, JUERGEN, OVERDICK, RALPH, HESSBERGER, WALDEMAR, JAKOB, HARALD
Format Patent
LanguageEnglish
French
German
Published 18.05.2011
Subjects
ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES
CANDLES
CHEMISTRY
COMPOUNDS THEREOF
DETERGENT COMPOSITIONS
DETERGENTS
FATTY ACIDS THEREFROM
INORGANIC CHEMISTRY
METALLURGY
NON-METALLIC ELEMENTS
RECOVERY OF GLYCEROL
RESIN SOAPS
SOAP OR SOAP-MAKING
USE OF SINGLE SUBSTANCES AS DETERGENTS
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Summary:The invention relates to a process for the preparation of coated granular sodium percarbonate having a low TAM value. The preparation is carried out by fluidized-bed spray granulation at a temperature TG in the range from 45 to 75° C., and the coating is effected by the spray application of an aqueous solution containing at least one coating component in a fluidized bed at a temperature TU in the range from 35 to 100° C. According to the invention, a) after the fluidized-bed spray granulation but before the coating, drying is carried out at TNT of greater than TG, or b) the fluidized-bed granulation is carried out in at least two steps at TG1, TG2 . . . TGn, TG2 or TGn being higher than TG1, and drying being unnecessary if 2/3 of the granulate have been formed at TG1, or c) drying takes place not after the granulation but after the coating, at TUNT, TUNT being at least 20° C. higher than TG.
Bibliography:Application Number: EP20020796199