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US 12,534,418 B2Granted
Urea calcium sulfate granules and methods for producing and using the same
AssigneeSabic Agri-Nutrients Company
InventorsAndrew George Kells, Nilkamal Bag, Saleh Nafe Al-Shammari
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Abstract
A urea calcium sulfate (UCS) fertilizer granule and methods for making and using the same are disclosed. The granule can include a urea-calcium sulfate (UCS) adduct. The method of making can include producing a partially dried material comprising UCS adduct and forming the UCS fertilizer granules by either one or both of feeding the partially dried material into a separate vessel for granulation or granulating after storage of the partially dried material.
Claims17
A method of making a calcium sulfate urea (UCS) fertilizer granule, the method comprising:
- (a) combining urea, calcium sulfate, and water under conditions sufficient to form an aqueous slurry comprising a UCS adduct;
- (b) removing at least a portion of water from the aqueous slurry to form a partially dried material comprising the UCS adduct and storing the partially dried material without mixing for at least 2 hours;
- and
- (c) feeding the partially dried material into a granulator to form the UCS fertilizer granule.
1 more element
Dependencies are inferred from the claim text.