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, 2020
Filed:
May. 16, 2018
Evonik Operations Gmbh, Essen, DE;
Thyssenkrupp Industrial Solutions Ag, Essen, DE;
Willi Hofen, Rodenbach, DE;
Thomas Haas, Münster, DE;
Wolfgang Wöll, Maintal, DE;
Jürgen Schemel, Bad Soden, DE;
Hans-Christian Dietz, Hattersheim, DE;
Marc Brendel, Bruchköbel, DE;
EVONIK OPERATIONS GMBH, Essen, DE;
THYSSENKRUPP INDUSTRIAL SOLUTIONS AG, Essen, DE;
Abstract
In a process for the epoxidation of propene, comprising continuously reacting a propene feed with hydrogen peroxide in the presence of an epoxidation catalyst in a reaction step, using propene in excess to hydrogen peroxide, to provide a liquid reaction mixture comprising non-reacted propene, extra safety measures caused by the presence of oxygen during work-up of the liquid reaction mixture of the epoxidation reaction can be avoided by stripping liquid reaction mixture from step a) with an inert gas to provide an oxygen depleted stripped liquid reaction mixture and a strip gas stream, selecting the amount of inert gas to provide an oxygen concentration in the strip gas stream in the range of from 0.1 to 10% by weight, separating non-reacted propene from the strip gas stream and recycling it to the reaction step, and separating propene oxide from the stripped liquid reaction mixture.