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Method for molecular sieve fluidized-bed catalyst

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

Inactive Publication Date: 2008-10-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0015] The technical problem to be solved by the present invention is that the molecular sieve fluidized bed catalyst prepared in the prior art has the problem of poor wear resistance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Weigh the raw materials according to the ratio of 16% (weight) ZSM-5 molecular sieve: 20% (weight) kaolin: 4% (weight) aluminum sol: 60% (weight) deionized water. 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%.

[0026] The isoelectric point of the binder was determined to be 10.5 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; add aluminum sol to the suspension, stir rapidly for 15 minutes, and cut it with a high-speed shear for 15 minutes; add a certain amount of kaolin, stir for 30 minutes, and after reaching a uniform state, use a high-speed shear...

Embodiment 2～5

[0028] The test procedure is exactly the same as that of 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.

[0029] Table 1

[0030] Suspension PH value

Embodiment 6～9 and comparative example 1～2

[0032] The operating steps and test conditions are exactly the same as in Example 1, except that the type of binder used is different. The results are shown in Table 2.

[0033] Table 2

[0034] binder

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PUM

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Abstract

The invention relates to a preparation method of a fluid molecular sieve catalyst, which mainly solves the problem that the fluid molecular sieve catalysts have lower abrasion resistance in the prior art, and adopts the technical proposal which comprises the following steps: (1) a liquid medium, a molecular sieve, a caking agent and a carrier material are evenly mixed to form a suspension, wherein, pH value of the suspension is controlled to be lower than the pH value above 5.0 of the isoelectric points of the caking agent; (2) the suspension is spray dried to obtain a preformed catalyst; (3) the preformed catalyst is roasted to obtain a finished catalyst product; consequently the preparation method of the fluid molecular sieve catalyst preferably solves the problem in the prior art and can be applied in the reaction procedure for producing low-carbon olefin with the raw materials of methanol or dimethyl ether.

Description

technical field [0001] The invention relates to a method for preparing a molecular sieve fluidized bed catalyst, in particular to a method for preparing a molecular sieve fluidized bed catalyst for producing light 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 production costs of ethyl...

Claims

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Application Information

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IPC IPC(8): B01J29/40B01J29/85C07C1/22C07C11/02
Inventor 刘红星谢在库陆贤钱堃张玉贤张惠明
Owner CHINA PETROLEUM & CHEM CORP
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