Process for improving the activity of used supported silver...

Details Process for improving the activity of used supported silver... Process for improving the activity of used supported silver...

B - Operations, Transporting

01

J

252/85

B01J 23/66 (2006.01) B01J 23/96 (2006.01) C07D 301/10 (2006.01)

Patent

CA 1204424

Abstract of the disclosure: In this process a supported silver catalyst used for the manufacture of ethylene oxide by reaction of ethylene with molecular oxygen or air is impregnated with a solution consisting of water, a water-miscible organic solvent and at least one sesame and/or rubidium compound in an amount of from 50 to 1,000 mg of cesium and/or rubidium per kg of solution; the impregnation temperature being from 60 to 200°C, the impregnation time being at least 0.3 hour, and the water content of the impregnating solution being from 5 to 50 weight % relative to the weight of the solution. After impregnation, the excess impregnating solution is separated, and after drying of the still moist catalyst it is ready for use.

433972

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