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Preparation method of wear-resistant 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 the problem of high production cost of molecular sieve fluidized bed catalysts, reduce production costs, and achieve good wear resistance. Effect

Inactive Publication Date: 2014-04-23
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The technical problem to be solved by the present invention is that the production cost of molecular sieve fluidized bed catalysts in the prior art is relatively high, and a new preparation method of wear-resistant molecular sieve fluidized bed catalysts is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] According to the ratio of 16% (weight) ZSM-5% molecular sieve, 10% (weight) kaolin, 10% unroasted catalyst fine powder, 4% (weight) aluminum sol, 60% (weight) deionized water Weigh the raw materials. Except for water, the proportions of raw materials in the proportioning here are dry basis weight ratios. Wherein the solid content is 40% by weight. The molecular sieve in the catalyst block is ZSM-5 molecular sieve with a content of 50%.

[0021] Mix ZSM-5 molecular sieve, uncalcined catalyst fine powder and water, stir for 2 hours and then shear at high speed with a high-speed shear for 15 minutes to form a uniform molecular sieve suspension; add aluminum sol to the suspension and stir quickly for 15 minutes, Use a shearing machine to perform high-speed shearing for 15 minutes; add kaolin and stir for 30 minutes, and high-speed shear for 45 minutes to obtain a suspension before spray drying. The particle size of the suspension was measured with a laser particle size an...

Embodiment 2~6

[0025] The operation steps and experimental conditions are exactly the same as [Example 1], except that the type of molecular sieve added is changed, and the results are shown in Table 1.

[0026] Table 1

[0027] Example Molecular sieve type Wear index (wt% / hour) Example 2 SAPO-5 0.48 Example 3 SAPO-11 0.52 Example 4 SAPO-18 0.46 Example 5 SAPO-34 0.21 Example 6 SAPO-47 0.71

Embodiment 7~10

[0029] The operation steps and experimental conditions are exactly the same as [Example 1], except that the proportion of uncalcined catalyst fine powder added to the prepared catalyst is different when preparing the suspension. The results are shown in Table 2.

[0030]

[0031] Table 2

[0032] Example Ratio of uncalcined catalyst fine powder Wear index (wt% / hour) Example 7 5% 0.52 Example 8 20% 0.30 Example 9 40% 0.35 Example 10 80% 0.51

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PUM

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Abstract

The invention relates to a preparation method of a wear-resistant molecular sieve fluidized bed catalyst, mainly solving the problem of the high production cost of molecular sieve fluidized bed catalysts in the prior art. According to the technical scheme adopted by the preparation method, the preparation method includes the following steps of: (a) uniformly mixing a molecular sieve, a binder, a carrier material, unroasted fine catalyst powder, and a liquid medium to form a suspension; (b) sheering the suspension at a high speed until the size of 90% of the particles in the suspension is less than 8 microns; (c) drying the suspension to form a microspheric catalyst; and (d) roasting the microspheric catalyst at a high temperature to form a finished catalyst, wherein the unroasted fine catalyst powder comes from a fine powder collecting device of a spray dryer in a catalyst production device. By the technical scheme, the problem is solved well and the preparation method can be used in the industrial production of the molecular sieve fluidized bed catalyst.

Description

technical field [0001] The invention relates to a preparation method of a wear-resistant molecular sieve fluidized bed catalyst. Background technique [0002] Ethylene and propylene are important organic chemical raw materials. At present, more than 98% of the world's ethylene production is obtained by 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. It has been proven that oil resources can only be exploited for nearly 50 years according to the current production level. Unconventional production of ethylene and propylene is developed. Oil resource utilization technology is imminent. [0003] In terms of raw material supply, the production of methanol from natur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J29/40
Inventor 王伟刘红星陆贤张玉贤
Owner CHINA PETROLEUM & CHEM CORP