| 简介 |
(57) Abstract : ABSTACT OF THE DISCLOSURE A catalytic cracking catalyst composition is disclosed that is suitable for reduc- mg the sulfur content of catalytically cracking liquid products, in particularly gasoline products, produced during a catalytic cracking process. Preferably, the catalytic cracking process is a fluidized catalytic cracking (FCC) process. The composition comprises zeo- lite, zinc and at least one rare earth element having an ionic radii of less than 0.95 at a coordination number of 6. Preferably, zinc and the rare earth element are present as cations that have been exchanged on the zeolite. The zeolite is preferably a Y-type zeolite. |
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