Back to results
US 4,242,235 AGranted
Supports for silver catalysts utilized in the production of ethylene oxide
AssigneeProduits Chimiques Ugine Kuhlmann
InventorsJean-Marie Cognion, Jacques Kervennal
Life of this patent
Estimating the term…
Abstract
Silver catalysts for vapor phase synthesis of ethylene oxide by reacting oxygen or gaseous mixtures containing same with ethylene, characterized by the use as support of a porous material having a specific surface area of less than 10 sq. m/g, a total volume of porosity of between 0.1 and 0.6 cm.sup.3 /g and a bimodal distribution of the porosity.
Claims13
A process for the preparation of a supported silver catalyst suitable for the production of ethylene oxide comprising:
- (a) impregnating a porous refractory support material comprising:
- (1) a specific surface area of less than about 10 m.sup.2 /g,
- (2) a total porosity volume of between about 0.1 and 0.6 cm.sup.3 /g, and
- (3) a substantially bimodal porosity distribution in which:
- (a) the smaller pores have a mean diameter of about 1-5.mu.,
- (b) the smaller pores constitute about 35-65% of the pore volume, and
- (c) the larger pores have a mean diameter of about 60-200.mu.,
- with a liquid containing a compound or complex of silver,
- (b) drying the impregnated support, and
- (c) thermally treating the dried support to liberate the silver from the compound or complex deposited on the support.
7 more elements
Dependencies are inferred from the claim text.