FERTILIZERS COMPRISING PHOSPHATES, ELEMENTAL SULFUR AND ANIONIC SURFACTANTS AND PROCESS FOR THE PREPARATION THEREOF

摘要

Disclosed is a process for the manufacture of sulphur-containing fertilizer compositions 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 the slurry into contact with at least one anionic 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. Also disclosed is a fertilizer composition comprising: a) elemental sulfur, b) at least one phosphate-based fertilizer material selected from the group consisting of ammonium phosphates, ammonium phosphate based nitrogen-phosphorus-potassium compounds, super phosphates and partially acidulated phosphate rocks, and c) at least one anionic surfactant wherein the at least one anionic surfactant is dispersed throughout the fertilizer composition.