PROCESS FOR PRODUCTION OF COMMERCIAL QUALITY POTASSIUM NITRATE FROM POLYHALITE

Canada Patent

APP PUB NO CA-2766767-A1
SERIAL NO

2766767

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Abstract

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A method for the production of KNO3 from polyhalite is provided. The method comprises steps of decomposing said polyhalite into syngenite, gypsum, and soluble components, treating the solid decomposition products sequentially with HNO3 and Ca basic compound, precipitating the CaSO4 thus formed, and crystallizing the KNO3 from the solution remaining. The method recovers up to 75% of the potassium present in the raw polyhalite as KNO3 and substantially all of the remainder as a potassium magnesium sulfate salt.

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Patent Owner(s)

Patent OwnerAddress
IMI TAMI INSTITUTE RESEARCHILHAIFA BAY ISRAEL

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Inventor(s)

Inventor Name Address
FRIM RON HAIFA
GINZBERG EYAL ZIKHRON-YAAKOV
BONAN MICHAEL 20496 RECHASIM
MOZES AKIVA 75437 RISHON LEZION
BARNEA EYAL NESHER
KESELMAN HUGO KARMIEL
FRIEDMAN GIDEON HAIFA
LANGEVELD CORNELIS PETRUS NL-GG 1461 ZUIDOOSTBEEMSTER

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