Method for preparing high abrasion resistance strength fluid bed catalyst

A fluidized bed catalyst and catalyst technology, applied in physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as poor wear resistance

Inactive Publication Date: 2008-09-10
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The technical problem to be solved by the present invention is the problem of poor wear resistance of molecular sieve fluidized bed catalysts existing in the prior art, and a new method for preparing highly wear-resistant molecular sieve fluidized bed catalysts is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] According to the ratio of 16% (weight) ZSM-5 molecular sieve: 10% (weight) kaolin: 10% (weight) catalyst fine powder: 4% (weight) aluminum sol: 60% (weight) deionized water to take raw materials. Except for water, the proportions of raw materials in the proportioning here are dry basis weight ratios. The solids content in this example was 40% by weight.

[0020]The isoelectric point of the binder was determined to be 10.5 by using an electrokinetic instrument. Mix the ZSM-5 molecular sieve prepared in Example 1 with a certain amount of water, stir for 2 hours, fully stir, and form a uniform molecular sieve suspension after high-speed shearing with a high-speed shear for 15 minutes, and use an electrokinetic instrument to measure this The isoelectric point of the molecular sieve suspension is 5.3; add aluminum sol to the suspension, stir rapidly for 15 minutes, and cut with a high-speed shear for 15 minutes; add a certain amount of kaolin, stir for 30 minutes, and after...

Embodiment 2～5

[0022] The operating steps and test conditions are exactly the same as in Example 1, except that after the preparation of the suspension is completed, the pH value of the suspension is adjusted by adding ammonia water. The relevant results are shown in Table 1.

[0023] Table 1

[0024] Example

Embodiment 6～10

[0030] The operation steps and test conditions are exactly the same as those in Example 1, except that the proportion of the fine powder added to the prepared catalyst is different when preparing the suspension. The relevant results are shown in Table 3.

[0031] table 3

[0032]

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PUM

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Abstract

The invention relates to a preparation method for a fluidized bed catalyst with high abrasive resistance and mainly solves the problem of relatively low abrasive resistance of the fluidized bed catalyst in the prior art. The invention better solves the problem through the technical proposal with following steps: (a) a molecular sieve, a caking agent, a base material, thin powder of the catalyst and a liquid medium are evenly blended to form suspension liquid; (b) the pH value of the suspension liquid is controlled to be lower than the isoelectric point of the molecular sieve by over 0.4; (c) the suspension liquid is dried to form a microspheroidal catalyst; (d) the microspheroidal catalyst is baked at high temperature to form a finished product of the catalyst; the catalyst can be applied to the reaction process of manufacturing light olefins from the raw materials such as methanol or dimethyl ether.

Description

technical field [0001] The invention relates to a method for preparing a fluidized bed catalyst with high wear resistance, in particular to a method for preparing a molecular sieve fluidized bed catalyst used for producing low-carbon olefins from methanol or dimethyl ether raw materials. Background technique [0002] Ethylene and propylene can be used to produce plastics and other chemical products, and are important organic chemical raw materials. With the progress and development of modern society, their demand is increasing. At present, more than 98% of the world's ethylene production comes from steam cracking technology, and propylene production is mainly obtained in two forms: the co-product of steam cracking to produce ethylene and the by-product of catalytic cracking in refineries. Due to the continuous growth of oil demand, limited production capacity growth and the non-renewability of oil resources, the price of crude oil has risen in recent years, causing the produ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/40B01J29/85C07C1/20C07C11/02
Inventor 刘红星谢在库陆贤王伟钱堃张惠明
Owner CHINA PETROLEUM & CHEM CORP
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