Ethylene oxide process
Process for improving the activity of used supported silver catalysts
Method of making catalysts for the production of ethylene oxide
Ethylene oxide production
Process for preparing a silver catalyst
Process for preparing a supported silver catalyst Patent #: 4455392
ApplicationNo. 07/009323 filed on 01/30/1987
US Classes:549/534Silver containing catalyst utilized
ExaminersPrimary: Raymond, Richard L.
Assistant: Russell, Mark W.
Attorney, Agent or Firm
International ClassesC07D 301/10 (20060101)
C07D 301/00 (20060101)
B01J 23/50 (20060101)
B01J 23/54 (20060101)
B01J 23/66 (20060101)
B01J 23/48 (20060101)
AbstractA supported silver catalyst for the oxidation of ethylene to ethylene oxide with molecular oxygen is made by impregnating a support with a hydrocarbon solution of a silver salt of a neo-acid having 7 or more carbon atoms, substantially free of water and said neo-acid. Preferably, the hydrocarbon solvent is toluene, xylene, ethyl benzene, cyclohexane, or cumene. The impregnated support is dried and the silver is activated under conditions chosen to provide the optimum selectivity to ethylene oxide. Thereafter, the activated silver catalyst maybe impregnated with an alkali metal solution sufficient to increase selectivity of the silver catalyst above its alkali-free state. The amount of alkali metal on the finished catalyst is the optimum for the particular support selected and preferably will be about 1-6×10-3 gew/kg of catalyst. The catalyst may also include additional promoters, such as the alkaline earth metals, preferbly barium.
Field of SearchSilver containing catalyst utilized