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:
Sep. 04, 2018
Filed:
Feb. 09, 2012
Claudia Fuhrmann, Meckenheim, DE;
Dieter Oehm, Bad Honnef, DE;
Christian Panz, Wesselng-Berzdorf, DE;
Florian Paulat, Marne, DE;
Rüdiger Schütte, Alzenau-Hörstein, DE;
Hartwig Rauleder, Rheinfelden, DE;
Georg Markowz, Alzenau, DE;
Jürgen Erwin Lang, Karlsruhe, DE;
Bodo Frings, Schloss Holte, DE;
Claudia Fuhrmann, Meckenheim, DE;
Dieter Oehm, Bad Honnef, DE;
Christian Panz, Wesselng-Berzdorf, DE;
Florian Paulat, Marne, DE;
Rüdiger Schütte, Alzenau-Hörstein, DE;
Hartwig Rauleder, Rheinfelden, DE;
Georg Markowz, Alzenau, DE;
Jürgen Erwin Lang, Karlsruhe, DE;
Bodo Frings, Schloss Holte, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
The present invention relates to a process for preparing aqueous colloidal silica sols of high purity from silicate solutions, to aqueous colloidal silica sols with a specific profile of impurities, and to the use thereof. The invention further encompasses high-purity aqueous silica obtained as an intermediate in the course of the purification process, high-purity silicon dioxide obtainable by dewatering, and the use thereof.