Ethylene oxide catalyst
AssigneeShell Oil Company
InventorsGosse Boxhoorn, Otto M. Velthuis, Ann H. Klazinga
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Abstract
The invention relates to a process for the preparation of a silver catalyst suitable for the oxidation of ethylene to ethylene oxide, characterized in that a silver compound and, if desired, a promoter are applied to a carrier, after which the silver compound is reduced to metallic silver, and in which process the carrier has been prepared by mixing an aluminum compound with an alkali metal hydroxide and with an organic fluorine compound and by calcining the obtained mixture, to the silver catalysts prepared by means of this process and to the use of the silver catalysts in the preparation of ethylene oxide.
Claims11
A catalyst for the production of ethylene oxide from ethylene and molecular oxygen which comprises silver and an alkali metal promoter supported on a carrier, which carrier is prepared by a process which comprises mixing an aluminum compound with water and an alkali metal hydroxide and with an organic fluorine compound and calcining the resultant mixture at a temperature between 1200.degree. C. and 1700.degree. C.
A catalyst for the production of ethylene oxide from ethylene and molecular oxygen which comprises about 1-25 %wt silver (basis total catalyst) and about 20-1000 ppm (measured as the metal, basis total catalyst) of alkali metal promoter supported on a carrier, which carrier is prepared by a process which comprises mixing water and an aluminum which forms an alpha alumina upon calcination at a temperature between 1200.degree. C. and 1700.degree. C. with an alkali metal hydroxide and with a fluorinated alkane carboxylic acid having 2-10 carbon atoms, its salt or ester and calcining the resultant mixture at a temperature between aout 1200.degree. C. and about 1700.degree. C. wherein the atom ratio of alkali metal hydroxide/aluminum compound is between about 0.0001 and about 0.1 and the carboxylic acid applied is between about 0.1 and about 10 percent by weight of the mixture of alkali metal hydroxide and aluminum compound.
Dependencies are inferred from the claim text.