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1 Polish Journal of Chemical Technology

1 2001

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Manufacturing NPK Fertilizers by modified wasteless Odda process

Folek S., Kopytowski J., Tomanek G., Walawska B.

Polish Journal of Chemical Technology

2001

Vol. 3, nr 4

3-5

A novel approach to make granulated mineral fertilizers of the NPK type, which depends on a modification of the known Odda process is presented. In the method proposed, phosphate rock is digested with nitric(V) acid, part of the calcium ion is removed and next, potassium sulfate(VI) and phosphate rock are added to the reaction system to neutralize the resulting mixture of phosphoric(V) acid and the unreacted nitric acid. Investigations into the developing of the method were carried out within the Research Project No. 3 TO9 B 082 14, being supported financially by the Polish Committee of Scientific Research.