| 摘要 |
<p>An improved catalyst demetallisation process involves chlorinating the metal contaminated catalyst at elevated temperatures and contacting the chlorinated catalyst with a liquid aqueous composition to produce a demetallised catalyst. Improved catalytic activity is obtained utilising a catalyst comprising at least one crystalline material capable of promoting the hydrocarbon conversion, and either (1) cooling the chlorinated catalyst prior to contact with the liquid aqueous composition or (2) employing a liquid aqueous composition which is substantially free of ammonium ions, or both.</p> |
