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US 4,435,341 AGranted
Method of manufacturing ammonium sulfate granules
AssigneeBuckau-Walther AG
InventorHorst Bechthold
Life of this patent
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Abstract
A method of manufacturing ammonium sulfate granules in which a starting solution of ammonium sulfate is spray dried, thereafter granulated by the addition of finely sprayed, highly concentrated water solution of ammonium sulfate.
Claims5
A method of manufacturing ammonium sulfate granules, having useful properties of increased resistance to applied pressure and abrasion, comprising
- (a) spraying a solution of ammonium sulfate to form it into finely divided droplets,
- (b) drying said droplets to form fine particles of ammonium sulfate,
- (c) spraying onto said fine particles an aqueous solution containing 30-50% ammonium sulfate, and
- (d) drying said particles to form ammonium sulfate granules having improved resistance to pressure and abrasion.
1 more element
Dependencies are inferred from the claim text.