Degussa Aktiengesellschaft

Uhde Gmbh

Evonik Degussa Gmbh

Momentive Specialty Chemicals Inc.

Evonik Operations Gmbh

Thyssenkrupp Industrial Solutions Ag

Claudia Brasse

Thomas Haas

Guido Stochniol

Wolfgang Wöll

Willi Hofen

Norbert Ullrich

Georg Thiele

Jürgen Glenneberg

Robert Franke

Bernd Jaeger

Hubertus Eickhoff

Werner Pohl

Percy Kampeis

Robert Katzer

Gerald Moroff

José Berges

Wolfgang Woell

Juergen Glenneberg

The invention relates to a method for the production of epichlorohydrin, wherein a chloropropane-containing ally chloride in excess is reacted in a first reaction stage with hydrogen peroxide. The non-reacted ally chloride is separated and returned to the reaction, wherein part of the separated ally chloride is added to a second reaction stage and reacted with hydrogen peroxide, wherein the hydrogen peroxide quantity is selected in the second reaction stage such that the ally chloride is largely reacted. The chloropropanes are separated from the reaction mixture of the second reaction stage by means of distillation and removed from the process.

Method for the production of epichlorohydrin

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.

Aqueous hydrogen peroxide solutions and method of making same

A process for the catalytic epoxidation of olefins in the presence of a titanium containing zeolite catalyst and a polar solvent whereby the deactivation of the catalyst upon recycling of the solvent has been considerably reduced. In the process one or more nitrogen containing compounds are introduced at some stage, a solvent stream is recovered, treated to contain less than 50 wppm nitrogen in the form of organic nitrogen compounds and at least a part of it is recycled to the epoxidation step. Also disclosed is a process for the catalytic epoxidation of propene which integrates the treatment and recycle of the solvent into the workup of the reaction mixture.

Process for the epoxidation of olefins

A process for the epoxidation of olefins which includes

A process for the continuous epoxidation of propene with hydrogen peroxide in the presence of a titanium silicalite catalyst and a methanol solvent, wherein the catalyst is periodically regenerated by washing with a methanol solvent at a temperature of at least 100&#xb0; C. and the epoxidation reaction is carried out for periods of more than 300 h between two regeneration steps.

Process for the epoxidation of propene

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.

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Hanau, Germany

Claudia Brasse