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Fluidized bed catalyst, preparation method and use thereof

A fluidized bed catalyst and catalyst technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalyst, molecular sieve catalyst, etc., can solve the problem of poor wear resistance of fluidized bed catalyst and achieve strong wear effect

Active Publication Date: 2022-04-05
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] One of the technical problems to be solved by the present invention is the problem of poor wear resistance of fluidized bed catalysts in the prior art, and a fluidized bed catalyst is provided, especially a high wear resistance fluidized bed catalyst; the catalyst Has the advantage of high wear resistance

Method used

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  • Fluidized bed catalyst, preparation method and use thereof
  • Fluidized bed catalyst, preparation method and use thereof
  • Fluidized bed catalyst, preparation method and use thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0043] According to parts by weight, 30 parts of SAPO-34 molecular sieve, 20 parts of kaolin, 30 parts of aluminum sol, 5 parts of dilute hydrochloric acid with a concentration of 40% by weight, and 45 parts of deionized water were fully mixed and circulated for 40 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, atomizer frequency 20Hz, air inlet temperature 300°C, feed rate 300g / min, collect the solids at the bottom of the drying tower and the powder products in the cyclone collection tank, and place them in a muffle furnace for roasting at 600°C After 8 hours, the finished fluidized bed catalyst was obtained, and the catalyst wear index was 0.32% by weight / hour. The BET surface area of ​​the resulting catalyst is 245 m 2 / g, the most probable pore diameter is 1.28nm. The finished catalyst is used in the reaction system of methanol to olefins, the rea...

Embodiment 2

[0045] According to parts by weight, 30 parts of SAPO-34 molecular sieve, 20 parts of kaolin, 30 parts of aluminum sol, 5 parts of dilute phosphoric acid with a concentration of 40%, and 45 parts of deionized water were fully mixed and circulated for 40 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, atomizer frequency 20Hz, air inlet temperature 300°C, feed rate 300g / min, collect the solids at the bottom of the drying tower and the powder products in the cyclone collection tank, and place them in a muffle furnace for roasting at 600°C After 8 hours, the finished fluidized bed catalyst was obtained, and the catalyst wear index was 0.35% by weight / hour. The BET surface area of ​​the resulting catalyst is 258 m 2 / g, the most probable pore diameter is 1.16nm. The finished catalyst is used in the reaction system of methanol to olefins, the reaction temper...

Embodiment 3

[0047] According to parts by weight, 30 parts of SAPO-34 molecular sieve, 20 parts of kaolin, 30 parts of silica sol, 5 parts of dilute phosphoric acid with a concentration of 40%, and 45 parts of deionized water were fully mixed and circulated for 40 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, atomizer frequency 20Hz, air inlet temperature 300°C, feed rate 300g / min, collect the solids at the bottom of the drying tower and the powder products in the cyclone collection tank, and place them in a muffle furnace for roasting at 600°C After 8 hours, the finished fluidized bed catalyst was obtained, and the catalyst wear index was 0.44% by weight / hour. The BET surface area of ​​the resulting catalyst is 256 m 2 / g, the most probable pore diameter is 1.14nm. The finished catalyst is used in the reaction system of methanol to olefins, the reaction temperat...

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Abstract

The invention relates to a fluidized bed catalyst and a preparation method thereof, which mainly solves the problems of poor wear resistance and serious catalyst loss during the reaction process of the current fluidized bed catalyst. The BET specific surface area of ​​the catalyst prepared by the present invention is 220-280m 2 / g, the most probable pore diameter is 1.0-1.7nm. The method adopted in the present invention comprises the following steps: (a) configuring the mixed solution containing molecular sieve, binder, carrier material, dilute acid solution and liquid medium in proportion; (b) obtaining the suspension after high-speed shearing of the mixed solution; (c) ) spray drying the suspension to form a fluidized bed catalyst; (d) roasting the fluidized bed catalyst to obtain a finished methanol-to-olefins catalyst. The method of the invention has wide applicability, has no special requirements on existing fluidized bed catalyst production devices, and can be used in various fluidized bed catalyst industrial production processes.

Description

technical field [0001] The invention relates to a fluidized bed catalyst, a preparation method and its application, in particular to the preparation of a microspherical fluidized bed catalyst, especially the preparation of a highly wear-resistant fluidized bed catalyst. Background technique [0002] Ethylene and propylene are important basic organic chemical raw materials in the chemical industry, and play a pivotal role in the modern petroleum and chemical industry. Ethylene is used to make various polyethylene plastics and other chemicals, and propylene is mainly used to make various polypropylene plastics and other chemicals. With the rapid development of my country's economy and the development of the chemical industry, the demand for light olefins is increasing day by day, and the contradiction between supply and demand will become increasingly prominent. At present, more than 98% of the world's ethylene mainly comes from steam cracking technology, more than 60% of pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J29/85B01J37/08B01J35/10C07C11/04C07C11/06C07C1/24
CPCY02P20/52
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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