Patent ID: 8702834

Claim:
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 cationic or amphoteric surfactant and a liquid phase of 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. % and the at least one cationic or amphoteric surfactant is present in an amount in the range of from 0.001 to 3 wt. %, based on the total weight of the fertilizer composition.