The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 11, 2014
Filed:
Jan. 29, 2010
Jany Birgitta Maria Antens, Eindhoven, NL;
Sunil Ashtekar, Bangalore, IN;
Rafael Alberto Garcia Martinez, Calgary, CA;
Reginald Lambert, Calgary, CA;
Jason Trevor O'brien, Queensland, AU;
Marinus Johannes Reynhout, Amsterdam, NL;
Guy Lode Magda Maria Verbist, Amsterdam, NL;
John Woodruffe, Calgary, CA;
Jany Birgitta Maria Antens, Eindhoven, NL;
Sunil Ashtekar, Bangalore, IN;
Rafael Alberto Garcia Martinez, Calgary, CA;
Reginald Lambert, Calgary, CA;
Jason Trevor O'Brien, Queensland, AU;
Marinus Johannes Reynhout, Amsterdam, NL;
Guy Lode Magda Maria Verbist, Amsterdam, NL;
John Woodruffe, Calgary, CA;
Shell Oil Company, Houston, TX (US);
Abstract
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 said slurry into contact with at least one anionic surfactant and elemental sulphur; c) introducing the mixture obtained in step b} into a granulator unit in order to obtain granules of the fertilizer composition, wherein the at least one phosphate-based fertilizer material is present in an amount in the range of at least 50 wt. %, the elemental sulphur is present in an amount in the range of from 1 to 25 wt. % and the anionic surfactant is present in an amount in the range of from 0.001 to 3 wt. % based on the overall weight of the fertilizer composition. The present invention also provides a fertilizer composition.