| 摘要 |
PURPOSE:To efficiently remove adhered vanadium, by contacting a catalyst to which vanadium was adhered by the catalytic cracking of a hydrocarbon stock material with a solid adsorbent at 650-850 deg.C in an atmosphere where vanadium is held to an oxide state. CONSTITUTION:A solid adsorbent is prepared by compounding two or more of compounds having compatibility with a vanadium compound held to an oxide state, for example, selected from aluminum oxide, magnesium oxide and calcium oxide. A catalyst to which vanadium was adhered by the catalytic cracking of a vanadium-containing hydrocarbon stock material is contacted with the aforementioned solid adsorbent at 650-850 deg.C in an atmosphere where vanadium is held to the oxide state to remove vanadium. A means of a fluidized bed for together fluidizing the catalyst and the solid adsorbent can be adapted to the contact of the catalyst with the solid adsorbent.
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