Patent · US Active

Use of structured catalyst beds for preparing ethylene oxide

US8580982B2 · kind B2 · utility

2Cited by

6References

9Claims

0Family size

Inventors

Georg Seeber · Lambsheim, DE
Torsten Mäurer · Ludwigshafen, DE
Gerhard Theis · Frankenthal (Pfalz), DE
Dieter Köffer · Birkenau, DE
Frank Rosowski · Mannheim, DE

Key dates

Filing date	Jun 9, 2010
Grant date	Nov 12, 2013
Priority date	—
Expiry date	Jun 27, 2030

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC07D301/10
WIPO fieldOrganic fine chemistry
WIPO sectorChemistry

Abstract

The present invention relates to a process for preparing ethylene oxide by reaction of ethylene with oxygen in the presence of at least one silver-comprising catalyst, wherein the reaction takes place in a reactor which has a catalyst packed bed having at least two zones (i) and (ii) and the silver content of the catalyst in zone (i) is lower than the silver content of the catalyst in zone (ii). The catalyst packed bed preferably has a further zone (a) with which the reaction mixture comes into contact before the zones (i) and (ii). According to the invention, the silver content of the catalyst in the zone (a) is higher than the silver content of the catalyst in zone (i).

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