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 si

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0024] [Example 1]

[0025] According to the ratio of 16% (weight) ZSM-5 molecular sieve: 20% (weight) kaolin: 4% (weight) aluminum sol: 60% (weight) deionized water, the raw materials were weighed. Except for water, the raw material ratios here are all on a dry basis. The solid content in this example is 40%.

[0026] The isoelectric point of the binder was determined to be 10.5 using electrokinetic equipment. The ZSM-5 molecular sieve prepared in Example 1 was mixed with a certain amount of water, stirred for 2 hours, and fully stirred. After 15 minutes of high-speed shearing with a high-speed shearing machine, a uniform molecular sieve suspension was formed. The electrokinetic instrument was used to determine this The isoelectric point of the molecular sieve suspension; add aluminum sol to the suspension, stir quickly for 15 minutes, and shear for 15 minutes with a high-speed shearing machine; add a certain amount of kaolin, stir for 30 minutes, and after reaching a uniform sta...

Example

[0027] 【Examples 2~5】

[0028] The test procedure is exactly the same as in Example 1, except that after completing the preparation of the suspension, the pH value of the suspension is adjusted by adding ammonia water. Related results are shown in Table 1.

[0029] Table 1

[0030] PH value of suspension

Example

[0031] [Examples 6-9 and Comparative Examples 1-2]

[0032] The operation steps and test conditions are exactly the same as those of Example 1, except that the type of adhesive 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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