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Composite molecular sieve and catalyst for hydroisomerization dewaxing reaction, preparation methods and applications thereof

A technology of hydroisomerization dewaxing and composite molecular sieve, which is applied in molecular sieve catalysts, chemical instruments and methods, physical/chemical process catalysts, etc. problems such as low rate, to achieve the effects of lowering freezing point and cloud point, high activity and selectivity, and good dispersion

Pending Publication Date: 2020-12-11
PETROCHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the base oil pour point and cloud point of the product obtained by this method are still high, and the yield of base oil is low, which cannot meet the demand

Method used

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  • Composite molecular sieve and catalyst for hydroisomerization dewaxing reaction, preparation methods and applications thereof
  • Composite molecular sieve and catalyst for hydroisomerization dewaxing reaction, preparation methods and applications thereof
  • Composite molecular sieve and catalyst for hydroisomerization dewaxing reaction, preparation methods and applications thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Mix 5.15g of aluminum sulfate, 284g of deionized water and 4.9g of potassium hydroxide, stir well, then add 21.3g of hexamethylenediamine and continue stirring; add 120.8g of silica sol (30%SiO2, 70%H2O) into the above mixture Continue to stir for 30 minutes, then heat and stir in a high-pressure reactor, and crystallize at 160°C for 34 hours; wash and filter the product until the filtrate is neutral, and dry the filter cake at 120°C for 6 hours to obtain ZSM-22 Original powder. Some samples were taken for X-ray diffraction analysis. figure 1 The wide-angle XRD spectrum of the sample shows that the ZSM-22 molecular sieve was synthesized.

[0060] Then add 10.65g cetyltrimethylammonium bromide, 650g deionized water, 30.05g silica sol, 1.05g aluminum sulfate to the above-mentioned ZSM-22 former powder and continue to stir for 30min, after adding a certain amount of sodium hydroxide Adjust the pH to 10-11, then heat and stir in an autoclave, and crystallize at 160°C for ...

Embodiment 2

[0070] Mix 10.05g of aluminum sulfate, 410g of deionized water and 6.7g of sodium hydroxide, stir evenly, then add 35.8g of hexamethylenediamine and continue stirring; add 200.9g of silica sol (30% SiO2, 70% H2O) into the above mixture Continue to stir for 30 minutes, then heat and stir in a high-pressure reactor, and crystallize at 160°C for 34 hours; wash and filter the product until the filtrate is neutral, and dry the filter cake at 120°C for 6 hours to obtain ZSM-22 Original powder.

[0071] Then add 18.45g cetyltrimethylammonium bromide, 890g deionized water, 35.15g silica sol, 2.67g aluminum sulfate to the above-mentioned ZSM-22 former powder and continue to stir for 30min, after adding a certain amount of sodium hydroxide Adjust the pH to 10-11, then heat and stir in an autoclave, and crystallize at 160°C for 34 hours; wash and filter the product until the filtrate is neutral, and dry the filter cake at 120°C for 6 hours to obtain ZSM-22 / MCM-48 original powder.

[00...

Embodiment 3

[0078] Mix 5.15g of aluminum sulfate, 284g of deionized water and 4.9g of potassium hydroxide, stir well, then add 21.3g of hexamethylenediamine and continue stirring; add 120.8g of silica sol (30%SiO2, 70%H2O) into the above mixture Continue to stir for 30 minutes, then heat and stir in a high-pressure reactor, and crystallize at 160°C for 34 hours; wash and filter the product until the filtrate is neutral, and dry the filter cake at 120°C for 6 hours to obtain ZSM-22 Original powder.

[0079]Then add 12.35g of cetyltrimethylammonium bromide, 750g of deionized water, 25.15g of silica sol, 1.56g of aluminum sulfate and continue stirring for 30min, then add a certain amount of sodium hydroxide to adjust the pH to 10-11, Then put it into a high-pressure reactor to heat and stir, and crystallize at 160°C for 34h; wash and filter the product until the filtrate is neutral, and dry the filter cake at 120°C for 6h to obtain ZSM-22 / MCM-48 Original powder.

[0080] With 0.4mol / L NH4S...

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Abstract

The invention discloses a composite molecular sieve for hydroisomerization dewaxing reaction, and a preparation method of the composite molecular sieve. The invention also discloses a catalyst for hydroisomerization dewaxing reaction, and a preparation method of the catalyst. According to the catalyst for hydroisomerization dewaxing, a microporous ZSM-22 is taken as a core, a mesoporous molecularsieve MCM-48 is taken as a shell, a co-crystallization mode is adopted for compounding to form a composite molecular sieve with a core-shell structure, and Pt nanoparticles are loaded on the compositemolecular sieve by adopting a sol-gel method to obtain the catalyst. According to the invention, the catalyst for hydroisomerization dewaxing has high activity and selectivity, the condensation pointand cloud point of the produced lubricant base oil are significantly reduced, and the base oil yield is significantly improved.

Description

technical field [0001] The invention belongs to the field of molecular sieves and hydrogenation isomerization catalysis. Specifically, the present invention relates to a composite molecular sieve used in hydroisomerization dewaxing reaction and its preparation method, a catalyst used in hydroisomerization dewaxing reaction and its preparation method, and the catalyst used in the hydroisomerization of raw oil applications in structuring. Background technique [0002] The hydroisomerization catalyst is a bifunctional shape-selective catalyst, which requires both hydrogenation activity and an acidic center. Among them, the hydrogenation reaction is carried out on the metal active center, and the isomerization and cracking reactions are carried out on the acidic center of the carrier. Therefore, the performance of the hydroisomerization catalyst has an important relationship with the carrier preparation technology and the metal loading technology. [0003] For the carrier prep...

Claims

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Application Information

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IPC IPC(8): B01J29/80C10G47/18
CPCB01J29/80C10G47/18B01J29/043B01J29/7484C10G2400/10B01J35/394
Inventor 陆雪峰王新苗杨晓东孟祥彬刘彦峰高善彬王锐倪术荣赵檀靳丽丽董春明张国甲马东海郭金涛王刚丛丽茹李淑杰孙生波
Owner PETROCHINA CO LTD
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