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:
Jan. 04, 2005
Filed:
Sep. 24, 2003
Thomas Haas, Frankfurt, DE;
Claudia Brasse, Hanau, DE;
Guido Stochniol, Gelnhausen, DE;
Willi Hofen, Rodenbach, DE;
Wolfgang Wöll, Maintal-Doernighelm, DE;
Georg Thiele, Hanau, DE;
Thomas Haas, Frankfurt, DE;
Claudia Brasse, Hanau, DE;
Guido Stochniol, Gelnhausen, DE;
Willi Hofen, Rodenbach, DE;
Wolfgang Wöll, Maintal-Doernighelm, DE;
Georg Thiele, Hanau, DE;
Degussa AG, Düsseldorf, DE;
Uhde GmbH, Dortmund, DE;
Abstract
A continuous process for the epoxidation of olefins with hydrogen peroxide in the presence of a heterogeneous catalyst promoting the epoxidation reaction, whereby the aqueous reaction mixture contains i) an olefin; ii) hydrogen peroxide; iii) less than 100 wppm of alkali metals, earth alkali metals, both irrespective whether in ionic, complex or covalently bonded form, bases or cations of bases having a pkof less than 4.5, or combinations thereof; and, iv) at least 100 wppm of bases or cations of bases having a pkof at least 4.5 or combinations thereof, whereby the wppm are based on the total weight of hydrogen peroxide in the reaction mixture.