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Hydrocarbon catalytic cracking catalyst and its preparation method

A catalytic cracking and catalyst technology, applied in the direction of catalyst activation/preparation, catalytic cracking, physical/chemical process catalysts, etc., can solve the problems of molecular sieve structure damage, poor cracking performance isomerization performance, light oil gasoline yield reduction, etc. , to achieve good light oil yield, high cracking performance and isomerization performance, and the effect of increasing gasoline octane number

Inactive Publication Date: 2004-03-03
CHINA PETROLEUM & CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong cracking performance and poor isomerization performance of ZSM-5 molecular sieve with low silicon-aluminum ratio, it mainly splits low-octane groups in the gasoline distillation range into olefins with higher octane numbers. and other components, so as to achieve the purpose of increasing the octane number of gasoline, and the isomeric components in the reacted gasoline increase less
Therefore, although the ZSM-5 molecular sieve catalyst with a low silicon-aluminum ratio can increase the octane number of gasoline to a certain extent, it causes a reduction in the yield of light oil, especially gasoline; at the same time, due to the high olefin content in gasoline, Unable to meet the requirement to reduce olefin content in gasoline
In addition, the ZSM-5 molecular sieve catalyst with a low silicon-aluminum ratio will undergo dealumination reaction due to the low silicon-aluminum ratio ZSM-5 molecular sieve in the regeneration environment of high-temperature water vapor, resulting in the destruction of the molecular sieve structure and low stability and activity of the catalyst.

Method used

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  • Hydrocarbon catalytic cracking catalyst and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 31.2 liters of water glass (SiO 2 content is 250g / L), 3 liters of n-butylamine (Q), 1.1 liters of aluminum sulfate (Al 2 o 3Content is 90g / L), 0.9 liters of concentration are the concentrated sulfuric acid of 98%, 5 liters of water mix homogeneously, the molar proportion of gained reactant is:

[0030] SiO 2 / Al 2 o 3 =130, Q / Al 2 o 3 =30, Na 2 O / Al 2 o 3 =15,H 2 O / Al 2 o 3 =4000

[0031] Put the above reactants into a crystallization tank and crystallize at 180°C for 24 hours, then filter, wash and dry to obtain the raw molecular sieve powder.

[0032] After the above-mentioned raw powder is roasted at 450°C for 2 hours, under stirring, it is treated with 10% ammonium chloride solution at 90-95°C and a solid-to-liquid ratio of 1:10 for 1 hour, then filtered and washed with water until there is no chloride ion. Repeat the above process 2 more times. Subsequently, after roasting at 600°C for 1 hour, soak for 2 hours with 5% hydrochloric acid solution at 60...

Embodiment 2

[0034] Be prepared with the raw material identical with embodiment 1, the mixture that has following molar ratio:

[0035] SiO 2 / Al 2 o 3 =240, Q / Al 2 o 3 =35, Na 2 O / Al 2 o 3 =20,H 2 O / Al 2 o 3 =4000

[0036] Put the above reaction mixture into a crystallization tank and crystallize at 170°C for 30 hours, then filter, wash and dry to obtain the raw molecular sieve powder. The modified molecular sieve HZSM-5 was obtained by modifying the above raw powder through the same process as in Example 1. The silicon-aluminum ratio of HZSM-5 is 195, and the total content of heterocrystalline silicon oxide in various crystal forms is 3%.

Embodiment 3

[0038] Be prepared with the raw material identical with embodiment 1, the mixture that has following molar ratio:

[0039] SiO 2 / Al 2 o 3 =380, Q / Al 2 o 3 =40,Na 2 O / Al 2 o 3 =18,H 2 O / Al 2 o 3 =4500

[0040] The above reaction mixture was put into a crystallization tank and crystallized at 170°C for 40 hours, filtered, washed and dried to obtain the molecular sieve powder. The modified molecular sieve HZSM-5 was obtained by modifying the above raw powder through the same process as in Example 1. The ratio of silicon to aluminum of HZSM-5 is 310, and the total content of heterocrystalline silicon oxide in various crystal forms is 5%.

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Abstract

A catalyst for catalytic cracking of hydrocarbons contains carrier, adhesive, active cracking component and active isomerizing component. It features that said active isomerizing component is composed of modified HZSM-5 molecular sieve with high Si / Al ratio and small grain modified Y-type molecular sieve. Its advantages are high output rate of light oil, and high octane number of gasoline.

Description

technical field [0001] The invention relates to a catalyst for catalytic cracking of hydrocarbons and a preparation method thereof, in particular to a catalyst for catalytic cracking capable of increasing gasoline octane number and light oil yield and a preparation method thereof. Background technique [0002] In order to reduce environmental pollution, people's demand for high-octane gasoline is increasing, and how to increase the octane number of gasoline has become an urgent problem. At present, more than 70% of gasoline in our country comes from catalytic cracking gasoline, and the octane number of catalytic cracking gasoline is relatively low. is extremely important. [0003] Since the 1980s, my country has carried out the research and development of catalysts and additives that can increase the octane number of catalytic cracked gasoline. The alkane number booster has made a significant contribution to improving the octane number of cata...

Claims

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Application Information

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IPC IPC(8): B01J29/08B01J29/40B01J37/00C10G11/05
Inventor 刘文波达建文苏建明徐兴忠吴莱萍刘剑利靳丽君
Owner CHINA PETROLEUM & CHEM CORP
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