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AssigneesChina Petroleum & Chemical Corporation, Research Institute of Petroleum Processing, Sinopec
InventorsShanqing Yu, Jiasong Yan, Jiexiao Zhang, Liwen Tang
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A modified β zeolite has 0.5-15 wt % of an IVB group metal element in terms of oxide on the dry basis weight of the modified β zeolite. The number of medium strong acid centers of the modified β zeolite accounts for 30-60% of the total acid amount, the number of strong acid centers accounts for 5-25% of the total acid amount, and the ratio of B acid to L acid is 0.8 or more. The ratio of the weight content of the IVB group metal element in the modified β zeolite body phase to the weight content of the IVB group metal element on the surface is 0.1-0.8. The catalytic cracking catalyst containing the modified β zeolite has good selectivity and yield of C4 olefin.
A modified β zeolite, comprising 0.5-15 wt % of an IVB group metal element in terms of oxide on a dry basis weight of the modified β zeolite, an amount of medium strong acid centers of the modified β zeolite accounting for 30-60% of a total acid amount, an amount of strong acid centers accounting for 5-25% of the total acid amount, a ratio of B acid to L acid being 0.8 or more, a ratio of a weight of the IVB group metal element in a modified β zeolite body phase to a weight of the IVB group metal element on a surface being 0.1-0.8.
Dependencies are inferred from the claim text.