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. 03, 2019
Filed:
Mar. 10, 2017
Evonik Degussa Gmbh, Essen, DE;
Thyssenkrupp Industrial Solutions Ag, Essen, DE;
Wolfgang Wöll, Maintal, DE;
Marc Brendel, Bruchköbel, DE;
Bernd Jaeger, Bickenbach, DE;
Niels Bredemeyer, Waltrop, DE;
Bärbel Kolbe, Witten, DE;
Norbert Ullrich, Essen, DE;
Maik Bernhard, Frankfurt, DE;
Evonik Degussa GmbH, Essen, DE;
thyssenkrupp Industrial Solutions AG, Essen, DE;
Abstract
During start-up of a continuous epoxidation of propene with hydrogen peroxide in a methanol solvent with a shaped titanium silicalite catalyst in a tube bundle reactor with a cooling jacket, cooling medium is fed at the rate for full load of the reactor with a constant entry temperature of from 20° C. to 50° C., methanol solvent is fed at a rate of from 50 to 100% for full load of the reactor, hydrogen peroxide is fed at a rate that starts with no more than 10% of the rate for full load and is increased continuously or stepwise to maintain a maximum temperature in the fixed bed of no more than 60° C. and a difference between the maximum temperature in the fixed bed and the cooling medium entry temperature of no more than 20° C., and propene is fed at a rate of from 20 to 100% of the rate for full load, increasing the feeding rate when the molar ratio of propene to hydrogen peroxide reaches the molar ratio for full load.