Petrochina Company Limited

Ge Precision Healthcare LLC

Yahong Wang

Dong Wang

Haitao Zhang

Lin Wang

Yunfeng Zheng

Xiaoliang Huang

Gengzhen Cao

Zhishuang Pan

Shuhong Sun

Gang Hu

Wei Ding

Xionghou Gao

Hongchang Duan

Zhengguo Tan

Jinjun Cai

Xueli Li

Conghua Liu

Xianfa Fang

Xiaoyan Li

Qiuxia Teng

Aiguo Lin

Chengyuan Yuan

Xiaomin Yan

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

The invention relates to a molecular sieve modification method and a catalytic cracking catalyst containing a molecular sieve. The method comprises: mixing a solution containing an ion of a Group MB metal in the periodic table, an organic complexing agent, and/or a dispersant and a precipitation agent, and stirring the same to form a suspension containing a precipitant of a Group IIIB element; and mixing the resulting precipitant and a molecular sieve slurry, stirring the same to obtain a mixed slurry containing the precipitant of the Group MB element and a molecular sieve, and performing spray drying and optional calcination, to obtain a modified molecular sieve. The catalyst comprises, as calculated based on the catalyst mass being 100%, 10-55% of a modified molecular sieve (on a dry basis), 10-80% of clay (on a dry basis), 0-40% of an inorganic oxide (on an oxide basis), and 5-40% of a binding agent (on an oxide basis). The catalyst has good activity stability and heavy metal contamination resistance.

Method for modifying molecular sieve and a catalytic cracking catalyst containing the molecular sieve

The present invention provides a movable patient table, comprising a table body, a first operating member, a locking member and a transfer member. The first operating member comprises a first operating part. Two ends of the locking member are respectively pivoted to the table body and the first operating member. The transfer member comprises a transfer part and a contact part, the transfer part is pivoted to the first operating member, and a pivoting point pivoted to the table body is provided between the transfer part and the contact part; and in a process that the first operating part is driven to be lowered down from a first released position to a locked position, the locking member and the transfer member respectively rotate around pivoting points with the table body until a pivoting point between the locking member and the table body, a pivoting point between the locking ember and the first operating member and a pivoting point between the transfer part and the first operating member are located on the same straight line, and the contact part rotates to be in contact with a movement plane of the table body.

Movable patient table

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Beijing, China

Yahong Wang