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Preparation method of wear-resisting MTO catalyst

A technology of catalyst and dispersant, which is applied in the field of preparation of wear-resistant MTO catalyst, to achieve the effect of tight combination, strong pressure resistance and uniform particle size

Inactive Publication Date: 2015-11-11
SHANDONG QILU HUAXIN HIGH TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problems of MTO catalyst shape and wear resistance, the invention provides a preparation method of wear-resistant MTO catalyst

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0032] A preparation method of wear-resistant MTO catalyst, comprising the following steps:

[0033] ① Add SAPO-34 molecular sieves to deionized water and beat to obtain a slurry evenly, add a dispersant to the obtained slurry, stir evenly, add MTO catalyst fine powder with a particle size of D50≤5μm, beat evenly to obtain a suspension, use a colloid mill or sand The mill grinds the particles in the suspension to a particle size of D50≤5μm to obtain a molecular sieve slurry; the mass ratio of the SAPO-34 molecular sieve to deionized water is 2~5:5~8; the dispersant and SAPO- The mass ratio of 34 molecular sieves is 0.1~2:100; the mass ratio of the MTO catalyst fine powder and SAPO-34 molecular sieves is 8~10:100;

[0034] 2. Add a carrier and a binder to the molecular sieve slurry obtained in step 1, and mix evenly to obtain a mixed slurry; the carrier is one of kaolin, montmorillonite, diatomite, magnesium oxide or magnesium phosphate, and the carrier and SAPO- The mass rati...

Embodiment 1

[0049] A preparation method of wear-resistant MTO catalyst, comprising the following steps:

[0050] ① In parts by weight, add 200 parts of SAPO-34 molecular sieves to 800 parts of deionized water and make a beating evenly to obtain a slurry, add 0.2 parts of dispersant polyethylene glycol 200 to the obtained slurry, stir evenly and add 16 parts of particle size It is MTO catalyst fine powder with D50≤5μm, beating evenly to obtain a suspension, and using a colloid mill or a sand mill to grind the particles in the suspension to a particle size of D50≤5μm to obtain a molecular sieve slurry;

[0051] 2. Add 60 parts by weight of carrier kaolin and 12 parts by weight of aluminum sol to the molecular sieve slurry obtained in the step, and mix evenly to obtain a mixed slurry;

[0052] ③Use a pressure pump to transport the mixed slurry obtained in step ② to a spray drying tower for granulation to obtain an MTO catalyst, and then roast the MTO catalyst in a rotary roaster to obtain a ...

Embodiment 2

[0054] A preparation method of wear-resistant MTO catalyst, comprising the following steps:

[0055] ① In parts by weight, add 200 parts of SAPO-34 molecular sieves to 800 parts of deionized water and make a beating evenly to obtain a slurry, add 1 part of dispersant ammonium pyrophosphate to the obtained slurry, stir evenly and add 16 parts of particle size is D50 MTO catalyst fine powder ≤5 μm, beating evenly to obtain a suspension, using a colloid mill or a sand mill to grind the particles in the suspension until the particle size is D50≤5 μm, to obtain a molecular sieve slurry;

[0056] 2. Add 60 parts by weight of carrier kaolin and 12 parts by weight of aluminum sol to the molecular sieve slurry obtained in the step, and mix evenly to obtain a mixed slurry;

[0057] ③Use a pressure pump to transport the mixed slurry obtained in step ② to a spray drying tower for granulation to obtain an MTO catalyst, and then roast the MTO catalyst in a rotary roaster to obtain a wear-re...

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Abstract

The invention discloses a preparation method of a wear-resisting MTO catalyst. The method comprises the steps that an ammonium pyrophosphate or hexamethylphosphoric acid triamide dispersing agent is added, and MTO catalyst fine powder is added to levigate molecular sieve slurry till the granule diameter D50 is smaller than or equal to 5 microns; then a carrier and a binding agent are added, spray drying granulation and calcination through a calcinator are conducted at a lower temperature, and the wear-resisting MTO catalyst is obtained; a heat source of a spray drying tower comes from recycled hot air of a combustion chamber of the rotary calcinator. According to the preparation method, the MTO catalyst with a high globular degree and a strong wear-resisting property can be obtained, useless components with the granule diameter ranging from 0 to 20 microns are effectively reduced, and the synthesized MTO catalyst is even in granule diameter and larger in granule and has higher selectivity for MTO reactions.

Description

technical field [0001] The invention relates to a preparation method of a catalyst, in particular to a preparation method of a wear-resistant MTO catalyst. Background technique [0002] MTO catalysts are used in methanol to prepare low-carbon olefins technology. The technical core of methanol to prepare low-carbon olefins process is its catalyst technology. The activity, selectivity and wear resistance of catalysts are the main factors that determine the economic benefits of methanol to olefins process. [0003] The industrial process requires the catalyst to have a certain shape and strength, especially for fluidized bed reactors, it needs to have good wear resistance. This is because the catalyst itself needs to circulate continuously in the reactor. The friction and collision between the wall of the reactor and between the catalyst and the delivery pipe will cause the catalyst to be ground and worn, and finally escape the reactor in the form of fine powder, resulting in t...

Claims

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Application Information

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IPC IPC(8): B01J29/85B01J35/08C07C1/20
Inventor 刘环昌明曰信陈文勇耿庆琳苗植平彭立李阳
Owner SHANDONG QILU HUAXIN HIGH TECH
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