Swellable fertilizer granules containing elemental sulfur with increased oxidation rates

US11384034B2 · kind B2 · utility

Assignee

• The Mosaic Company · US

Inventors

• Michael McLaughlin · Cherryville, AU
• Jozefien Degryse · Jerramungup, AU
• Roslyn Baird · Clarendon, AU
• Rodrigo Coqui da Silva · Upper Hermitage, AU

Key dates

• Filing date: Apr 7, 2020
• Grant date: Jul 12, 2022
• Expiry date: Apr 7, 2040

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C05G3/40
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Fertilizer granules containing elemental sulfur and a hydrogel which expands or swells in the soil to more readily disperse the elemental sulfur surface throughout the soil, which increases the elemental sulfur surface area available for oxidation, and ultimately uptake of sulfur by the plant. The elemental sulfur and hydrogel can be added to a fertilizer composition as either an exterior coating or co-granulated with the base fertilizer composition.