SULPHUR-CONTAINING FERTILIZERS AND PROCESS FOR THE PREPARATION THEREOF
First Claim
1. A process for the manufacture of sulphur-containing fertilizer compositions, said process comprising the steps of:
- a) providing a slurry of at least one phosphate-based fertilizer material selected from the group consisting of ammonium phosphates, ammonium phosphate based nitrogen-phosphorus-potassium (NPK) compounds, super phosphates and partially acidulated phosphate rocks;
b) bringing said slurry into contact with at least one surfactant and elemental sulphur; and
c) introducing the mixture obtained in step b) into a granulator unit in order to obtain granules of the fertilizer composition,wherein the elemental sulphur is present in an amount in the range of from 1 to 25 wt. %, based on the total weight of the fertilizer composition.
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Abstract
According to the present invention, there is provided a process for the manufacture of sulphur-containing fertilizer compositions, said process comprising the steps of: a) providing a slurry of at least one phosphate-based fertilizer material selected from the group consisting of ammonium phosphates, ammonium phosphate based nitrogen-phosphorus-potassium (NPK) compounds, super phosphates and partially acidulated phosphate rocks; b} bringing said slurry into contact with at least one surfactant and elemental sulphur; and c) introducing the mixture obtained in step b) into a granulator unit in order to obtain granules of the fertilizer composition, wherein the elemental sulphur is present in an amount in the range of form 1 to 25 wt. %, based on the total weight of the fertilizer composition The present invention also provides a fertilizer composition.
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Citations
9 Claims
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1. A process for the manufacture of sulphur-containing fertilizer compositions, said process comprising the steps of:
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a) providing a slurry of at least one phosphate-based fertilizer material selected from the group consisting of ammonium phosphates, ammonium phosphate based nitrogen-phosphorus-potassium (NPK) compounds, super phosphates and partially acidulated phosphate rocks; b) bringing said slurry into contact with at least one surfactant and elemental sulphur; and c) introducing the mixture obtained in step b) into a granulator unit in order to obtain granules of the fertilizer composition, wherein the elemental sulphur is present in an amount in the range of from 1 to 25 wt. %, based on the total weight of the fertilizer composition. - View Dependent Claims (2, 3, 4)
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5. A fertilizer composition comprising:
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a) elemental sulphur in an amount in the range of from 1 to 25 wt. %, based on the total weight of the fertilizer composition; b) at least one phosphate-based fertilizer material selected from the group consisting of ammonium phosphates, ammonium phosphate based nitrogen-phosphorus-potassium (NPK) compounds, super phosphates and partially acidulated phosphate rocks; and c) at least one surfactant, wherein the surfactant is dispersed throughout the fertilizer composition. - View Dependent Claims (6, 7, 8, 9)
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Specification