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Fluidized bed catalyst preparation method

A kind of technology of fluidized bed catalyst and binder

Active Publication Date: 2018-05-01
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem to be solved by the present invention is the problem of poor wear resistance of fluidized bed catalysts existing in the prior art, and a preparation method of high wear resistance fluidized bed catalysts is provided

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] According to the parts by weight, 30 parts of SAPO-34 molecular sieve, 20 parts of kaolin, 30 parts of aluminum sol and 30 parts of deionized water are fully mixed and stirred at high speed for 1 hour to form a mixed solution I, and the mixed solution is sheared at a high speed for 45 minutes to obtain a suspension . The average particle size of the suspension particles was measured by a laser particle size analyzer to be 3.9 μm. Spray dry the suspension, the atomizer frequency is 20HZ, the air inlet temperature is 340°C, and the air outlet temperature is 200°C. Collect the solid at the bottom of the drying tower and the powder product in the cyclone separator, and then disperse it in the aluminum sol to form a mixed liquid II. The mixture was stirred at high speed for 1 hour, and then spray-dried, the rotational frequency of the atomizer was 25HZ, the spray inlet air temperature was 340°C, and the outlet air temperature was 200°C. After the spray drying finishes, the ...

Embodiment 2～6

[0026] The operation steps and experimental conditions are exactly the same as those in Example 1, but the rotation frequency of the atomizing disc is used to produce catalysts with different particle sizes. The catalyst wear index obtained is shown in Table 1.

[0027] Table 1

[0028]

Embodiment 7

[0032] The operation steps and experimental conditions are exactly the same as those in Example 1. The mixed solution I is spray-dried after high-speed shearing, and the obtained catalyst particles are dispersed in the silica-alumina sol to form mixed solution II, and then the mixed solution is stirred at high speed for 1 hour and then sprayed. Drying, collecting the microspherical catalyst with an average particle diameter of 67 μm at the bottom of the spray drying tower, and then placing it in a muffle furnace for 8 hours at 600° C. to roast for 8 hours to obtain the finished fluidized bed catalyst. The catalyst wear index is 0.41% by weight / hour .

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Abstract

The invention relates to a high-wear-resistant fluidized bed catalyst preparation method. A purpose of the present invention is mainly to solve the problems of poor wear resistance and serious catalyst loss of the current fluidized bed catalyst. The high-wear-resistant fluidized bed catalyst preparation method comprises: (a) preparing a mixed solution I from a molecular sieve, a binder, a carriermaterial and a liquid medium according to a certain ratio; (b) carrying out high-speed shear on the mixed solution I, and carrying out spray drying to obtain microsphere particles; (c) dispersing theobtained particles in a solution containing alumina to form a mixed solution II; and (d) carrying out high-speed stirring on the mixed solution II, carrying out spray drying, and calcining to obtain the high-wear-resistant fluidized bed catalyst. According to the present invention, the method has wide applicability, does not have special requirement on the existing catalyst production device, andcan be used in the production process of a plurality of fluidized bed catalysts.

Description

technical field [0001] The present invention relates to a preparation method of a fluidized bed catalyst, in particular to a preparation method of a microspherical fluidized bed catalyst, especially a method of high wear resistance used in the reaction process of producing low-carbon olefins with methanol or dimethyl ether as raw material Preparation method of fluidized bed catalyst. Background technique [0002] Ethylene and propylene are important basic chemical raw materials. At present, more than 98% of the world's ethylene is produced by steam cracking, and propylene is mainly obtained through two methods: the co-product of steam cracking ethylene and the by-product of catalytic cracking in oil refineries. Due to the continuous growth of oil demand and the non-renewability of oil, it is imminent to develop an unconventional oil resource production technology of ethylene and propylene. [0003] Methanol to Olefins (MTO) is a chemical technology that uses methanol synthe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/85B01J29/00B01J35/08
CPCB01J29/005B01J29/85B01J35/51
Inventor 吴思操刘红星顾松园殷喜平张少钢
Owner CHINA PETROLEUM & CHEM CORP
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