Production of citrate soluble phosphates by calcination of secondary phosphate sources with a sodium-sulfuric compound

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United States of America Patent

PATENT NO 10259752
APP PUB NO 20180244587A1
SERIAL NO

15314358

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A method of calcination includes providing a raw material including whitlockite Ca9(Mg,Fe2+)[PO3(OH)|(PO4)6], and/or iron phosphate FePO4, and/or aluminum phosphate AlPO4 and/or fluorapatite Ca5(PO4)3F; providing an alkaline-sulfuric compound as an additive; and calcining a mixture of the raw material with the additive to obtain a product, including a citrate soluble phosphate compound.

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Patent Owner(s)

Patent OwnerAddress
METSO METALS OYRAUHALANPUISTO 9 ESPOO 02230

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Adam, Christian Berlin, DE 13 77
Hermann, Ludwig Auersthal, AT 3 1
Stemann, Jan Berlin, DE 1 1

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