| 摘要 |
<p>A method for the start-up of a process for the epoxidation of an olefin, which method comprises contacting a catalyst bed comprising a silver-based highly selective epoxidation catalyst, or a precursor of the catalyst comprising the silver in cationic form, with a feed comprising oxygen at a temperature of the catalyst bed above 260 ¦C for a period of at most 150 hours, and subsequently decreasing the temperature of the catalyst bed to a value of at most 260 ¦C, and a process for the epoxidation of an olefin, which process comprises contacting a catalyst bed comprising a silver-based highly selective epoxidation catalyst, or a precursor of the catalyst comprising the silver in cationic form, with a feed comprising oxygen at a temperature of the catalyst bed above 260 ¦C for a period of at most 150 hours, and subsequently decreasing the temperature of the catalyst bed to a value of at most 260 ¦C and contacting the catalyst with the feed comprising the olefin and oxygen.</p> |
