摘要 |
Low sulfur gasoline of relatively high octane number is produced from, a catalytically cracked, sulfur-containing naphtha by hydrodesulfurisation followed by treatment over an acidic catalyst, preferably an intermediate pore size zeolite such as ZSM-5. The treatment over the acidic catalyst in the second step restores the octan e loss which takes place as a result of the hydrogenative treatment arid results in a low sulfur gasoline product with an octane numbe r comparable to that of the feed naphtha. A catalytically cracked naphtha from the FCC main column (10) is first hydrotreated in a hydrotreater (11) which it enters through inlet (12). From hydrotreater (11), the desulfurised naphtha passes through line (13) to the second reactor (14) in which it is contacted with ZSM-5 or another acidic catalyst, for example zeolite beta or MCM-22 where a controlled degree of cracking takes place with an octane, which was lost in the hydrotreater, being restored. The effluents from reactor (14) are separated and further processed.
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申请人 |
MOBIL OIL CORPORATION |
发明人 |
APELIAN, MINAS R.;COLLINS, NICK A.;DEGNAN, THOMAS F., JR.;FLETCHER, DAVID L.;HARANDI, MOHSEN N.;HILBERT, TIMOTHY L.;KONDIS, EDWARD F.;MCGOVERN, STEPHEN J.;OWEN, HARTLEY;SHIH, STUART S.;SARLI, MICHAEL S.;ANGEVINE, PHILIP J.;DIEZ, DOUGLAS S.;KEVILLE, KATHLEEN M.;LISSY, DARIA N. |