Petrochina Company Limited

Xiaoyan Li

Dong Wang

Haitao Zhang

Lin Wang

Wei Ding

Xionghou Gao

Yunfeng Zheng

Xiaoliang Huang

Shunqin Liang

Zhishuang Pan

Shuhong Sun

Gengzhen Cao

Ying Qian

Limin Sun

Yundi Zheng

Tinghai Wang

Jie Wu

Conghua Liu

Yahong Wang

Longgang Lv

Qiuxia Teng

Aiguo Lin

A preparation method for modified molecular sieve and a modified molecular sieve-containing catalytic cracking catalyst. The preparation method comprises: mixing molecular sieve slurry, a compound solution containing ions of group IIIB metals of the periodic table of elements, organic complexing agent and/or dispersing agent and precipitating agent to obtain mixed slurry containing molecular sieve and precipitates of group IIIB elements in the periodic table of elements; and drying, and roasting or not roasting to obtain molecular sieve modified by the group IIIB elements. A weight ratio of group IIIB elements calculated based on oxides to molecular sieve dry basis is equal to (0.3-10):100, a molar ratio of organic complexing agent to ions of group IIIB metals is equal to (0.3-10):1, and a molar ratio of dispersing agent to the ions of group IIIB metals is equal to (0.2-16):1. Also related to is the catalytic cracking catalyst containing the modified molecular sieve prepared according to the method. The molecular sieve prepared by the method or the catalytic cracking catalyst containing same has good activity stability and heavy metal pollution resistance.

Preparation method for modified molecular sieve and modified molecular sieve-containing catalytic cracking catalyst

A selective hydrogenation catalyst, with alumina as carrier, and palladium as active component that distributed on the surface of the carrier in an egg-shell form, characterized in that: provided that the catalyst is weighed 100%, it comprises 0.2-0.5 wt % active component Pd, 2-8 wt % aids lanthanum and/or cerium, and 2-8 wt % alkaline earth metal. The specific surface area of the catalyst is 70-150 m2/g, the pore volume is 0.3-0.6 ml/g, and the crystal form of the carrier may be &#x3b8; form or &#x3b8;, &#x3b1; mixed form mainly composed of &#x3b8; form. The catalyst is suitable for the selective hydrogenation of medium or low distillate oil, especially for the first stage selective hydrogenation of pyrolysis gasoline. The catalyst has good hydrogenation performance, and can keep good hydrogenation activity and stability especially under the condition that the feed contains a small quantity of water, and the content of colloid, arsenic, and diolefin is higher.

Selective hydrogenation catalyst and the preparation thereof

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Beijing, China

Xiaoyan Li