Isomerization catalyst, and preparation method and application thereof

A catalyst and hydrogen isomerization technology, applied in the direction of physical/chemical process catalysts, molecular sieve catalysts, chemical instruments and methods, etc., can solve problems such as prolonging the process flow, increasing investment costs, increasing operational difficulty, etc., to avoid deep reactions, Improve the selectivity of isomerization and reduce the effect of cracking reaction

Active 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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  • Isomerization catalyst, and preparation method and application thereof
  • Isomerization catalyst, and preparation method and application thereof
  • Isomerization catalyst, and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 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 sequence, and then add 1.65g of CH 3 1, finally add 55g ZSM-23 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-23) was isolated, numbered S-1, and the weight content of MCM-22 was 25%.

Embodiment 2

[0027] 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 of deionized water and 3.00g of HMI to the kettle in turn, and finally add 100g of ZSM-23. After continuing to stir for 10 minutes, the reaction vessel was sealed and crystallized at 130° C. for 20 h. After the crystallization was completed, a solid product (MCM-22 / ZSM-23) was isolated, numbered S-2, and the weight content of MCM-22 was 12%.

Embodiment 3

[0029] 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 115g of ZSM-23. 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-23) was isolated, numbered S-3, and the weight content of MCM-22 was 8.0%.

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Abstract

The invention discloses an isomerization catalyst, and a preparation method and an application thereof. The catalyst includes, by weight, 10-90% of an MCM-22/ZSM-23 compound molecular sieve, 0.1-5.0% of gallium oxide and 0.1-1.5% a group VIII precious metal, wherein the MCM-22/ZSM-23 compound molecular sieve is obtained through wrapping ZSM-23 molecular sieve with MCM-22 molecular sieve, and the weight content of the MCM-22 in the MCM-22/ZSM-23 compound molecular sieve is 1.0-50%. The catalyst reduces the condensation point of wax-containing raw oil, improves the yield of liquid products, and has the high viscosity index characteristic of lubricating oil base oil when especially used in the isodewaxing process of a lubricating oil fraction.

Description

technical field [0001] The invention relates to an isomerization catalyst and its preparation method and application, in particular to a lubricating oil isomerization dewaxing catalyst and its preparation method and application. 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 remove it. The disadvantage of this method is that it is difficult to choose solv...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80B01J35/10C10G45/64
CPCC10G45/64B01J29/7476B01J29/7492B01J29/80C10G2300/201B01J35/615B01J35/633
Inventor 徐会青刘全杰贾立明王伟
Owner CHINA PETROLEUM & CHEM CORP
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