METHOD FOR THE PREPARATION OF SODIUM PERCARBONATE GRANULES HAVING ENHANCED STABILITY

METHOD FOR THE PREPARATION OF SODIUM PERCARBONATE GRANULES HAVING ENHANCED STABILITY

The invention relates to a method for the preparation of sodium percarbonate granules having enhanced stability, comprising modifying the surface of the sodium percarbonate granules by means of a surface reaction between sodium percarbonate and carbon dioxide or bicarbonate species to form a dense s...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NORRLOW, OLOF, PEKONEN, PENTTI
Format: Patent
Sprache:eng ; fre
Schlagworte:
ANIMAL AND VEGETABLE OILS, FATS, FATTY SUBSTANCES AND WAXES
CANDLES
CHEMISTRY
COMPOUNDS OF ALKALI METALS, i.e. LITHIUM, SODIUM, POTASSIUM,RUBIDIUM, CAESIUM, OR FRANCIUM
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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Beschreibung
Zusammenfassung:The invention relates to a method for the preparation of sodium percarbonate granules having enhanced stability, comprising modifying the surface of the sodium percarbonate granules by means of a surface reaction between sodium percarbonate and carbon dioxide or bicarbonate species to form a dense solid film of essentially sodium bicarbonate on the surface of the sodium percarbonate granules, said method comprising the steps of: a) dissolving carbon dioxide in water to form an aqueous solution containing dissolved carbon dioxide and bicarbonate, b) exposing the surface of the sodium percarbonate granules to a spray of said aqueous solution containing dissolved carbon dioxide and bicarbonate, to form said solid film of essentially sodium bicarbonate, and subsequently c) removing the residual fluid from the surface.