Urea granules comprising lignosulfonate coating

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United States of America Patent

PATENT NO 11987535
APP PUB NO 20220144715A1
SERIAL NO

17582751

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Abstract

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A process of granulation of a urea melt, comprising: adding a first additive containing carboxymethyl starch to one or more first stage(s) of the granulation process, to form a carcarboxymethyl starch containing inner layer of urea granules, and adding a second additive containing calcium lignosulfonate to one or more second stage(s) of the granulation process, downstream said first stages, to form granules with a coating containing calcium lignosulfonate.

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Patent Owner(s)

Patent OwnerAddress
CASALE SAVIA GIULIO POCOBELLI 6 LUGANO CH-6900

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Beretti, Andrea Rovellasca, IT 6 2
Marrone, Leonardo Mercallo, IT 16 1

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