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Preparation method of molecular sieve fluidized bed catalyst

A technology of fluidized bed catalyst and molecular sieve, which is applied in the direction of molecular sieve catalyst, physical/chemical process catalyst, chemical instrument and method, etc., can solve the problem of high production cost of molecular sieve fluidized bed catalyst, and achieve the effect of good wear resistance

Active 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 catalyst is relatively high in the prior art, and a new preparation method of molecular sieve fluidized bed catalyst is provided

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The raw materials were weighed according to the ratio of 16% (weight) ZSM-5% molecular sieve, 10% (weight) kaolin, 10% catalyst block, 4% (weight) aluminum sol, and 60% (weight) deionized water. 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, catalyst block and water, and after stirring for 2 hours, use a high-speed shearer to shear at high speed for 15 minutes to form a uniform molecular sieve suspension; add aluminum sol to the suspension and stir quickly for 15 minutes, and use a shearer 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 analyzer, and the a...

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 0.59 Example 3 SAPO-11 0.63 Example 4 SAPO-18 0.57 Example 5 SAPO-34 0.22 Example 6 SAPO-47 0.78

Embodiment 7~10

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

[0030]

[0031] Table 2

[0032] Example Proportion of adding catalyst block Wear index (wt% / hour) Example 7 5% 0.48 Example 8 20% 0.28 Example 9 40% 0.32 Example 10 80% 0.49

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PUM

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Abstract

The invention relates to a preparation method of a 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, a catalyst block containing the molecular sieve 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) calcining the microspheric catalyst at a high temperature to form a finished catalyst, wherein the catalyst block containing the molecular sieve comes from the inner wall 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 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 natural gas or coal ...

Claims

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Application Information

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IPC IPC(8): B01J29/85B01J29/40
Inventor 王伟刘红星管洪波钱坤
Owner CHINA PETROLEUM & CHEM CORP