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:
Dec. 22, 2009
Filed:
Aug. 06, 2007
Florian Deiseroth, Bebra-Weiterode, DE;
Peter-michael Beier, Heringen, DE;
Sascha Vensky, Bad Hersfeld, DE;
Ingo Stahl, Vellmar, DE;
Florian Deiseroth, Bebra-Weiterode, DE;
Peter-Michael Beier, Heringen, DE;
Sascha Vensky, Bad Hersfeld, DE;
Ingo Stahl, Vellmar, DE;
K+S Aktiengesellschaft, Kassel, DE;
Abstract
The electrostatic separation of ground crude potassium salts containing kieserite is accomplished by mixing the ground crude potassium salt with a conditioning agent containing a combination of an aromatic carboxylic acid or its derivatives, an ammonium salt of an aromatic carboxylic acid, as well as an unbranched fatty alcohol having a chain length of Cto C, and subsequently triboelectrically charging the mixture at a relative humidity of 1-10%. The mixture is then separated into a crude kieserite fraction and a crude potassium fraction by means of an electrostatic separation method. This method increases kieserite yield and the selectivity of a subsequent treatment by means of flotation.