Chemische Werke Huls Aktiengesellschaft

Claus-Dieter Mengler

Erwin Vangermain

Rainer Elm

Horst Ueberschaer

Wilhelm Brauckmann

The activity and the service life of supported silver catalysts used in the preparation of ethylene oxide by the catalytic vapor phase oxidation of ethylene with molecular oxygen are extended by using mixtures of:

Supported silver catalysts mixed with promoter metal compounds for the

Process for activating or reactivating silver substrate catalysts having promoter metals used in the production of ethylene oxide by oxidizing ethylene with oxygen or with gases containing oxygen. At least part of the mixture of reaction gases is made to pass at least in part through a bed arranged before the catalyst zone, this bed containing uniformly distributed compounds of the promoter metals.

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Marl, Germany

Claus-Dieter Mengler