公开(公告)号：EP0641375B1

公开(公告)日：1997-12-29

申请号：EP92918087

申请日：1992-08-05

申请人： MOBIL OIL CORP

发明人： APELIAN MINAS ROBERT ,  COLLINS NICK ALLEN ,  DEGNAN THOMAS FRANCIS JR ,  FLETCHER DAVID LEE ,  HARANDI MOHSEN NADIMI ,  HILBERT TIMOTHY LEE ,  KONDIS EDWARD FRANK ,  MCGOVERN STEPHEN JAMES ,  OWEN HARTLEY ,  SHIH STUART ,  SARLI MICHAEL SEBASTIAN

IPC分类号： C10G35/04 ,  B01J29/40 ,  B01J29/70 ,  B01J37/00 ,  C10G35/095 ,  C10G63/02 ,  C10G69/02 ,  C10G69/08

CPC分类号： C10G69/08 ,  B01J29/40 ,  B01J29/70 ,  B01J37/0009

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 octane loss which takes place as a result of the hydrogenative treatment and results in a low sulfur gasoline product with an octane number 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.