Polyhalite granules containing nitrogen
AssigneeAnglo American Woodsmith Limited
InventorsRafaella da Fonseca RODRIGUES, Timothy David LEWIS
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Abstract
The invention provides a process for the preparation of polyhalite granules comprising the steps of providing an aqueous ammonium nitrate (AN) solution; heating the solution to produce a hot solution; adding the hot solution to polyhalite; and allowing the mixture to cool during a granulation process. The invention further provides a process for the preparation of polyhalite granules where polyhalite is granulated with ammonium nitrate to form potassium nitrate, calcium ammonium nitrate, ammonium nitrate and/or magnesium nitrate and ammonium sulphate and a polyhalite granule comprising polyhalite and potassium ammonium nitrate.
Claims20
A process for the preparation of polyhalite granules comprising the steps of:
- a) Providing an aqueous ammonium nitrate (AN) solution;
- b) Heating the solution to produce a hot solution;
- c) Adding the hot solution to polyhalite;
- and
- d) Allowing the mixture to cool during a granulation process.
A process for the preparation of polyhalite granules where polyhalite is granulated with ammonium nitrate to form potassium nitrate, calcium ammonium nitrate, ammonium nitrate and/or magnesium nitrate and ammonium sulphate.
A polyhalite granule comprising polyhalite and potassium ammonium nitrate.
Dependencies are inferred from the claim text.