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. 17, 2015
Filed:
Feb. 03, 2012
Christian Schulze Isfort, Limeshain, DE;
Horst-werner Zanthoff, Muelheim a.d. Ruhr, DE;
Thomas Quandt, Marl, DE;
Christian Boeing, Cologne, DE;
Christian Schulze Isfort, Limeshain, DE;
Horst-Werner Zanthoff, Muelheim a.d. Ruhr, DE;
Thomas Quandt, Marl, DE;
Christian Boeing, Cologne, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
Silicon-aluminum mixed oxide powder having a weight ratio of (AlO/SiO)in the total primary particle of from 0.003 to 0.05, a weight ratio (AlO/SiO)of the primary particles in a surface layer having a thickness of about 5 nm which is less than in the total primary particle and a BET surface area of from 50 to 250 m/g. It is prepared by igniting one or more silicon compounds selected from the group consisting of CHSiCl, (CH)SiCl, (CH)SiCl and (n-CH)SiCl, a hydrolysable and oxidizable aluminum compound, at least one fuel gas and air and burning the flame into a reaction chamber, subsequently separating the solid from gaseous materials and subsequently treating the solid with water vapor. The silicon-aluminum mixed oxide powder can be used as catalyst.