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:
Jul. 07, 2015
Filed:
Aug. 31, 2012
Maria Demosthenous, Calais, FR;
Stephane Devos, Calais, FR;
Karine Hamez, Autingues, FR;
Celine Regis Dit Duchaussoy, Calais, FR;
Claude Pollet, Boulogne-sur-Mer, FR;
Sylvain Caulier, Hellemmes, FR;
Maria Demosthenous, Calais, FR;
Stephane Devos, Calais, FR;
Karine Hamez, Autingues, FR;
Celine Regis Dit Duchaussoy, Calais, FR;
Claude Pollet, Boulogne-sur-Mer, FR;
Sylvain Caulier, Hellemmes, FR;
TIOXIDE EUROPE SAS, Calais, FR;
Abstract
The invention provides a method of manufacturing a magnesium sulphate product, and a crystalline product comprising magnesium sulphate in the form of crystal or granules. The method comprises the steps of: providing a sulphuric acid product that has been obtained as a by-product during the sulphate process for manufacturing titanium dioxide; concentrating the sulphuric acid product to obtain a concentrated product that has a higher sulphuric acid concentration; combining a magnesium-based neutralising agent with the concentrated product and allowing the magnesium-based neutralising agent and the sulphuric acid to react, to generate magnesium sulphate in solution; and crystallising magnesium sulphate out of the solution, to obtain a crystalline magnesium sulphate product together with a remaining liquor. The crystalline magnesium sulfate may be mixed with an agriculturally acceptable carrier of diluent and/or with other fertiliser materials to produce a fertilizer.