Process for preparing granular sodium percarbonate
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United States of America Patent
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Issued Date -
Aug 19, 2004
app pub date -
May 28, 2003
filing date -
Feb 17, 2003
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a process for preparing granular sodium percarbonate. More particularly, while the conventional dry process for granular sodium percarbonate performed in such a manner that hydrogen peroxide solution is sprayed to anhydrous sodium carbonate to produce sodium percarbonate and sodium percarbonate produced is then fluidized-dried, produces sodium percarbonate of which particle size is dependent on the particle size of sodium carbonate used and thus a separate granulation step is required, the present process performed in such a manner that hydrogen peroxide solution is sprayed to anhydrous sodium carbonate containing 5-10% water based on the weight of anhydrous sodium carbonate simultaneously with introducing air at a predetermined temperature and rate, allows for the adjustment of the particle size of sodium percarbonate produced irrespective of the particle size of sodium carbonate used, so that granular sodium percarbonate with desired physical properties can be obtained without performing granulation.
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