Catalytic cracking catalyst and preparation method thereof

A catalytic cracking and catalyst technology, which is applied in catalytic cracking, physical/chemical process catalysts, molecular sieve catalysts, etc., can solve the problem of low yield of low-carbon olefins, and achieve the effect of high and low-carbon olefins yield and yield increase

Active Publication Date: 2014-05-14
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the catalyst prepared by using the β zeolite obtained by this method still has the problem that the yield of low-carbon olefins (ethylene, propylene and butene) is not high when it is used for the production of low-carbon olefins from naphtha cracking

Method used

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  • Catalytic cracking catalyst and preparation method thereof
  • Catalytic cracking catalyst and preparation method thereof

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Experimental program
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Effect test

preparation Embodiment 1

[0032] Naβ molecular sieve (produced by Qilu Catalyst Factory, SiO 2 / Al 2 o 3 =25 molar ratio, sodium oxide content 4.5% by weight, the same below) with NH 4 Cl solution exchange wash to Na 2 The O content is lower than 0.2% by weight, and the filter cake is obtained by filtration; dried, and the obtained sample is calcined at 350°C for 2 hours, then heated (heating rate 5°C / min) to 550°C, and calcined for 4 hours to remove the template agent; add 14.6 kgH 3 PO 4 (concentration 85% by weight,) dissolved in 90 kg of water, mixed with 100 kg of the above-mentioned roasted molecular sieve, impregnated and dried; the obtained sample was roasted at 500 ° C for 2 hours, that is, the molecular sieve provided by the present invention, denoted as B1. The physical data of the samples and 27 Al MAS NMR peak area ratios are listed in Table 1.

preparation Embodiment 2

[0034] Naβ molecular sieve (produced by Qilu Catalyst Factory, SiO 2 / Al 2 o 3 =25) with NH 4 Cl solution exchange wash to Na 2 The O content is lower than 0.2% by weight, and the filter cake is obtained by filtration; dried, and the obtained sample is roasted at 350°C for 2 hours, then heated to 550°C for 4 hours in 30 minutes to remove the templating agent; add 9.6 kg (NH 3 ) 2 HPO 4 (concentration 85% by weight) dissolved in 90 kg of water, mixed with 100 kg of the above-mentioned roasted molecular sieve, impregnated and dried; the obtained sample was roasted at 550°C and 100% water vapor for 2 hours, that is, the molecular sieve provided by the present invention, denoted as B2 . The physical data of the samples and 27 Al MAS NMR peak area ratios are listed in Table 1.

preparation Embodiment 3

[0036] The β molecular sieve (Tianjin Kaimeisite Technology Development Co., Ltd., SiO 2 / Al 2 o 3 =50, sodium oxide content 0.05% by weight) was roasted at 350°C for 2 hours, then heated to 550°C for 30 minutes and roasted for 4 hours to remove the template agent; then added 17 kg of H 3 PO 4 (concentration 85% by weight) was dissolved in 90 kg of water, mixed with 100 kg of the above-mentioned roasted molecular sieve, impregnated and dried; the obtained sample was roasted at 600 ° C for 2 hours, that is, the molecular sieve provided by the present invention, denoted as B3. The physical data of the samples and 27 Al MAS NMR peak area ratios are listed in Table 1.

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Abstract

The invention discloses a catalytic cracking catalyst and a preparation method thereof. The catalytic cracking catalyst includes 15%-65% of a natural mineral, 10%-30% of an oxide and 25%-75% of a phosphorus-modified beta molecular sieve; the phosphorus-modified beta molecular sieve comprises 3-10 wt% of phosphorus by P2O5, and in the 27Al MAS NMR (Magic Angle Spinning Nuclear Magnetic Resonance) of the molecular sieve, the ratio of peak area of a resonance signal at the chemical shift of 40+/-3ppm to peak area of a resonance signal at the chemical shift of 54+/-3ppm is greater than or equal to 1. The catalyst has excellent hydrothermal stability and better product selectivity, and is applied to ethylene, propylene and butylene production by using naphtha as a raw material through a catalytic cracking process.

Description

technical field [0001] The invention relates to a fluidized bed catalyst for preparing olefins by catalytic cracking of naphtha containing molecular sieves, and more particularly relates to a fluidized catalytic cracking catalyst for phosphorus-containing modified Beta molecular sieves. Background technique [0002] Ethylene, propylene and butene are very important chemical raw materials. At present, naphtha steam cracking is mainly used in the world to produce these low-carbon olefins. This method has many shortcomings such as high reaction temperature and high energy consumption. In order to overcome these problems, research on catalytic cracking technology has been carried out at home and abroad. It is expected that through the introduction of catalysis, on the one hand, the reaction temperature can be appropriately reduced, coking and energy consumption can be reduced, and on the other hand, it is also expected to increase the yield of low-carbon olefins and more flexibl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/70C10G11/05C07C11/04C07C11/06C07C11/08C07C4/06
CPCY02P20/52
Inventor 许本静欧阳颖田辉平王丽霞孙敏朱玉霞罗一斌刘俊
Owner CHINA PETROLEUM & CHEM CORP
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