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. 19, 2011
Filed:
Aug. 14, 2009
Thomas Haas, Frankfurt, DE;
Claudia Brasse, Hanau, DE;
Guido Stochniol, Gelnhausen, DE;
Jürgen Glenneberg, Offenbach, DE;
Wolfgang Wöll, Maintal-Dörnigheim, DE;
Thomas Haas, Frankfurt, DE;
Claudia Brasse, Hanau, DE;
Guido Stochniol, Gelnhausen, DE;
Jürgen Glenneberg, Offenbach, DE;
Wolfgang Wöll, Maintal-Dörnigheim, DE;
Evonik Degussa GmbH, Essen, DE;
Abstract
An aqueous hydrogen peroxide solution containing i) less than 50 wppm alkali metals, alkaline earth metals or combinations thereof in total, irrespective whether the alkali or alkaline earth metals are present in cationic or complex form; ii) less than 50 wppm of amines having a pkof less than 4.5 or the corresponding protonated compounds in total; and iii) at least 100 wppm anions or compounds that can dissociate to form anions in total, where the wppm are based on the weight of hydrogen peroxide and the concentration of hydrogen peroxide is more than 50% by weight based on the total weight of the hydrogen peroxide solution. A process for preparation of said hydrogen peroxide solution and the use of said solution in a process for epoxidation of olefins is also disclosed.