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MCM-22/ZSM-22 composite molecular sieve catalyst and its preparation method and application

A MCM-22, composite molecular sieve technology, applied in molecular sieve catalysts, physical/chemical process catalysts, chemical instruments and methods, etc., can solve problems such as increasing the difficulty of operation, prolonging the process flow, increasing investment costs, etc., to improve isomerization. Selectivity, reducing the effect of cracking reactions

Inactive Publication Date: 2017-05-17
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But both processes have shortcomings. The former cannot effectively play the synergistic effect of the mixed molecular sieve components, and the latter prolongs the process, increases the difficulty of operation, and greatly increases the investment cost.

Method used

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  • MCM-22/ZSM-22 composite molecular sieve catalyst and its preparation method and application
  • MCM-22/ZSM-22 composite molecular sieve catalyst and its preparation method and application
  • MCM-22/ZSM-22 composite molecular sieve catalyst and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] 4.26g NaAlO 2 Mix evenly with 19.08g of sodium hydroxide solution in a 500ml stainless steel reaction kettle, add 33g of silica gel, 408.2g of deionized water, 18.96g of hexamethyleneimine (HMI) into the kettle in turn under stirring, and then add 1.65g CH 3 1, finally add 55g ZSM-22 again. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 120° C. for 15 hours. After the crystallization was completed, a solid product (MCM-22 / ZSM-22) was isolated, and the weight content of MCM-22 was 25.4%.

[0028] Take 5.5g of tetraethyl orthosilicate, prepare 150g of methanol solution of tetraethyl orthosilicate, take 100g of the above-mentioned MCM-22 / ZSM-22 molecular sieve, dip it into the above solution for 6.5 hours, and then pass through 100% high temperature Steam treatment, the specific conditions are as follows: treatment pressure 1.0MPa, treatment temperature 350°C, treatment time 3.5 hours. Get SiO 2 Modified MCM-22 / ZSM-22 compo...

Embodiment 2

[0030] 1.488g NaAlO 2 Mix evenly with 36.06g sodium hydroxide solution in a 500ml stainless steel reaction kettle, mix 23g silica gel, 3.3gCHCl under stirring 3 、 Add 359.3g deionized water and 3.00g HMI to the kettle in turn, and finally add 100g ZSM-22. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 130° C. for 20 h. After the crystallization, the solid product (MCM-22 / ZSM-22) was isolated, and the weight content of MCM-22 was 11.1%.

[0031] Take 16.8g of tetraethyl orthosilicate, prepare 150g of methanol solution of tetraethyl orthosilicate, take 100g of the above-mentioned MCM-22 / ZSM-22 molecular sieve, soak it in the above solution for 2.5 hours, and then pass through 100% high temperature Steam treatment, the specific conditions are as follows: treatment pressure 1.5MPa, treatment temperature 350°C, treatment time 2.0 hours. Get SiO 2 Modified MCM-22 / ZSM-22 composite molecular sieve with a loading capacity of 4.8%, numbe...

Embodiment 3

[0033] 1.136g NaAlO 2 Mix evenly with 24.04g of sodium hydroxide solution in a 500ml stainless steel reaction kettle, add 22g of silica gel, 237g of deionized water, 12g of HMI and 6g of cyclohexane into the kettle in sequence while stirring, and finally add 120g of ZSM-22. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 120° C. for 15 hours. After the crystallization was completed, a solid product (MCM-22 / ZSM-22) was isolated, numbered S-3, and the weight content of MCM-22 was 7.5%.

[0034] Take 10.8g of tetraethyl orthosilicate, prepare 150g of methanol solution of tetraethyl orthosilicate, take 100g of the above-mentioned MCM-22 / ZSM-22 molecular sieve, soak it in the above solution for 6.5 hours, and then pass through 100% high temperature Steam treatment, the specific conditions are as follows: treatment pressure 1.5MPa, treatment temperature 350°C, treatment time 4.0 hours. Get SiO 2 Modified MCM-22 / ZSM-22 composite molecula...

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Abstract

The invention discloses a MCM-22 / ZSM-22 composite molecular sieve catalyst and its preparation method and application. The catalyst comprises by weight, 10-90% of a modified MCM-22 / ZSM-22 composite molecular sieve, and a group VIII noble metal active component. The modified MCM-22 / ZSM-22 composite molecular sieve comprises, weight, 0.1-10% of silicon dioxide. MCM-22 molecular sieves in the MCM-22 / ZSM-22 composite molecular sieve coat ZSM-22 molecular sieves and the MCM-22 / ZSM-22 composite molecular sieve comprises, by weight, 1.0-50% of MCM-22. The catalyst can reduce the condensation point of the waxy raw material oil, improves a yield of the liquid product and has a high viscosity index of the lubricating base oil in lubricating oil fraction isodewaxing.

Description

technical field [0001] The invention relates to a MCM-22 / ZSM-22 composite molecular sieve catalyst and its preparation method and application, in particular to a MCM-22 / ZSM-22 composite molecular sieve catalyst suitable for lubricating oil isomerization dewaxing and its preparation methods and applications. Background technique [0002] The isomerization reaction of n-alkanes is an important reaction in petroleum processing, such as the isomerization dewaxing process of lubricating oil and the isomerization pour point depressing process of diesel oil. N-paraffins are undesirable components in lube oil fractions, resulting in high pour points and poor low temperature performance. To improve these properties, it is necessary to remove all or part of the high melting point n-alkanes. At present, the commonly used dewaxing methods mainly include solvent dewaxing, catalytic dewaxing and isomeric dewaxing. [0003] Solvent dewaxing is to use the solubility of wax in solvent to ...

Claims

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Application Information

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IPC IPC(8): B01J29/80B01J35/10C10G45/64
CPCC10G45/64B01J29/7476B01J29/7484B01J29/80B01J2229/10C10G2300/1044C10G2300/1074C10G2300/1062B01J35/615B01J35/633
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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