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A kind of highly active catalytic cracking olefin catalyst and its preparation method and application

A catalytic cracking and catalyst technology, applied in the direction of physical/chemical process catalysts, hydrocarbon cracking to produce hydrocarbons, chemical instruments and methods, etc., can solve the problems of high reaction temperature, low yield of ethylene propylene, easy deactivation of catalysts, etc., and achieve dispersion uniform effect

Active Publication Date: 2015-12-02
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Aiming at the shortcomings of existing naphtha catalytic cracking to produce ethylene propylene, such as low yield, high reaction temperature, and easy deactivation of the catalyst, the present invention provides a catalyst for producing ethylene and propylene by naphtha catalytic cracking and its preparation method and application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0025] (1) Take 0.5g of phosphotungstic acid, dissolve it in 20ml of distilled water, and stir evenly until the phosphotungstic acid is completely dissolved;

[0026] (2) Add n-butanol and ethyl orthosilicate to the solution in step (1), the molar ratio of n-butanol to ethyl orthosilicate added is 0.6; the molar ratio of water in the solution to ethyl orthosilicate added to 6, continue to stir evenly, drop hydrochloric acid into the solution, and adjust the pH value of the solution to 3;

[0027] (3) Add 13g of hydrogen-type ZSM-5 molecular sieve to the solution in step (2), stir at 70°C for 3.5h until the solution turns into a sol, and then age at room temperature to obtain a gel. The aging time is 6h.

[0028] (4) Dry the gel obtained in step (3) at 70° C. for 14 hours, and grind to obtain the final catalytic cracking catalyst. The prepared catalyst contains 0.6% heteropoly acid by weight, 16% hydrogen ZSM-5 molecular sieve, and the balance is SiO 2 .

[0029] Catalyst ev...

example 2

[0031] (1) Take 1.2g of phosphotungstic acid, dissolve it in 20ml of distilled water, and stir evenly until the phosphotungstic acid is completely dissolved;

[0032] (2) Add n-butanol and tetraethyl orthosilicate to the solution in step (1), the molar ratio of n-butanol to tetraethyl orthosilicate is 1.5; the molar ratio of water in the solution to the added tetraethyl orthosilicate to 10, continue to stir evenly, drop hydrochloric acid into the solution, and adjust the pH value of the solution to 4;

[0033] (3) Add 17g of hydrogen ZSM-5 molecular sieve to the solution in step (2), stir at 80°C for 3h until the solution turns into a sol, and then age at room temperature to obtain a gel. The aging time is 4h.

[0034] (4) The gel obtained in step (3) was dried at 100° C. for 12 hours, and ground to obtain the final catalytic cracking catalyst. The prepared catalyst contains 1.8% heteropoly acid by weight, 25% hydrogen ZSM-5 molecular sieve, and the balance is SiO 2 .

[00...

example 3

[0037] (1) Take 0.3g of phosphotungstic acid, dissolve it in 11ml of distilled water, and stir evenly until the phosphotungstic acid is completely dissolved;

[0038] (2) Add n-butanol and ethyl orthosilicate to the solution in step (1), the molar ratio of n-butanol to ethyl orthosilicate added is 2.7; the molar ratio of water in the solution to ethyl orthosilicate added to 13, continue to stir evenly, drop hydrochloric acid into the solution, and adjust the pH value of the solution to 4;

[0039] (3) Add 7g of hydrogen-type ZSM-5 molecular sieve to the solution in step (2), stir at 95°C for 2h until the solution is converted into a sol, and then age at room temperature to obtain a gel. The aging time is 4h.

[0040](4) The gel obtained in step (3) was dried at 125° C. for 8 hours, and ground to obtain the final catalytic cracking catalyst. The prepared catalyst contains 2.2% heteropolyacid by weight, 19% hydrogen ZSM-5 molecular sieve, and the balance is SiO 2 .

[0041] C...

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PUM

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Abstract

The invention discloses a catalyst for alkene production by catalytic cracking. The catalyst comprises, by weight, 0.1%-3% of heteropoly acid, 5-30% of an MFI-type molecular sieve and the balance of SiO2, and preferably comprises 0.5-2.5% of heteropoly acid and 15-25% of an MFI-type molecular sieve. The heteropoly acid is one or more selected from phosphotungstic acid, silicotungstic acid, arsenowolframic acid, germanotungtic acid, phosphomolybdic acid, silicomolybdic acid, arsenic molybdic acid and germanomolybdic acid, and preferably phosphotungstic acid and / or phosphomolybdic acid, and more preferably phosphotungstic acid. The catalyst can solve the problems of low yield, high reaction temperature and easy deactivation of catalyst in the ethylene propylene production by naphtha catalytic cracking.

Description

technical field [0001] The invention relates to a catalyst for producing olefins by catalytic cracking and its preparation method and application, in particular to a catalyst for producing ethylene and propylene by catalytic cracking of naphtha and its preparation method and application. Background technique [0002] Since the beginning of the new century, the world’s demand for petrochemical raw materials and petrochemical products will continue to grow, and the demand for ethylene and propylene, which are the basic petrochemical raw materials, will continue to grow. However, the production capacity of conventional steam pyrolysis technology cannot meet the rapidly growing demand for propylene. Furnace steam pyrolysis is a process that consumes a lot of energy, and the process conditions are harsh. Compared with steam thermal cracking, the reaction temperature of naphtha catalytic cracking is about 50-200℃ lower than the standard cracking reaction. Therefore, it consumes le...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/26C07C4/06C07C11/04C07C11/06
CPCY02P20/52
Inventor 孙潇磊宋喜军张喜文
Owner CHINA PETROLEUM & CHEM CORP
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