Patent · US Expired

Supported silver catalysts mixed with promoter metal compounds for the production of ethylene oxide

US4409394A · kind A · utility

4Cited by

10References

8Claims

0Family size

Assignee

Chemische Werke Huels Aktiengesellschaft · US

Inventors

Erwin Vangermain · Marl, DE
Claus-Dieter Mengler · Marl, DE
Rainer Elm · Marl, DE
Horst Ueberschaer · Marl, DE
Wilhelm Brauckmann · Marl, DE

Key dates

Filing date	Sep 18, 1981
Grant date	Oct 11, 1983
Priority date	—
Expiry date	Sep 18, 2001

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P20/584
WIPO fieldChemical engineering
WIPO sectorChemistry

Abstract

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: PA0 (a) supported silver catalysts and promoter metal compounds; PA0 (b) supported silver catalysts and supported promoter metal compounds; PA0 (c) promoter metal compound treated supported silver catalysts and promoter metal compounds; or PA0 (d) promoter metal compound treated supported silver catalysts and supported promoter metal compounds. Promoter metal compounds containing about 0.001-0.05% by weight rubidium, about 0.01-0.20% by weight potassium, about 0.001-0.5% by weight cesium or about 0.01-0.25% by weight barium, based on the total weight of catalyst, are suitable.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.