Chemische Werke Huls Aktiengesellschaft

Chemische Werke Huels Aktiengesellschaft

Erwin Vangermain

Horst Ueberschaer

Claus-Dieter Mengler

Rainer Elm

Wilhelm Brauckmann

Helmut Alfs

Hans-Jurgen Erberich

Willi Brauckmann

Werner Boexkes

p-tert-octyl phenol is produced by reaction of phenol with diisobutene in the presence of an acidic ion exchanger and water, in a first stage, in a solid-bed reactor at temperatures of 110.degree.-140.degree. C. and under an excess pressure of up to 5 bar. The resultant dioctyl phenol formed as a by-product is alkylated in a second stage in a further solid-bed reactor with phenol in the presence of an acidic ion exchanger, and water at temperatures of 110.degree.-140.degree. C. and under an excess pressure of up to 5 bar to obtain additional p-tert-octyl phenol.

Process for the production of p-tert-octyl phenol by catalytic

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.

Process for activating or reactivating ethylene oxide silver substrate

A process for preparing silver catalysts containing alkaline earth metals and alkali metals as promoters for the production of ethylene oxide by oxidizing ethylene with oxygen or oxygen-containing gases. The silver catalysts are prepared by:

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Marl, Germany

Erwin Vangermain