Alkane isomerization catalyst and preparation method and application thereof

A catalyst and alkane technology, applied in the field of lubricating oil isomerization dewaxing catalyst and its preparation, can solve the problems of prolonging the process flow, increasing the difficulty of operation, increasing the investment cost, etc., to reduce cracking reaction, avoid aggregation, and achieve high viscosity index. Effect

Active Publication Date: 2015-04-29
CHINA PETROLEUM & CHEM CORP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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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  • Alkane isomerization catalyst and preparation method and application thereof
  • Alkane isomerization catalyst and preparation method and application thereof
  • Alkane isomerization catalyst and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 4.26g NaAlO 2 Mix evenly with 19.08g of sodium hydroxide solution in a 500ml stainless steel reaction kettle, add 53g of silica gel, 408.2g of deionized water, and 18.96g of HMI into the kettle in sequence under stirring, and then add 1.65g of 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, numbered S-1, and the weight content of MCM-22 was 25.4%.

Embodiment 2

[0025] 1.488g NaAlO 2 Mix evenly with 36.06g sodium hydroxide solution in a 500ml stainless steel reaction kettle, mix 33g 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 was completed, a solid product (MCM-22 / ZSM-22) was isolated, numbered S-2, and the weight content of MCM-22 was 11.1%.

Embodiment 3

[0027] 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%.

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Abstract

The invention discloses an alkane hydroisomerization catalyst which comprises MCM-22 / ZSM-22 composite molecular sieves and group VIII noble metal active constituents. According to the catalyst content in percentage by weight,, the content of the MCM-22 / ZSM-22 composite molecular sieves is 10-90%, and the content of the group VIII noble metals is 0.1-1.5%, wherein MCM-22 molecular sieves in the MCM-22 / ZSM-22 composite molecular sieves wrap around ZSM-22 molecular sieves, and the content of the MCM-22 molecular sieves in the MCM-22 / ZSM-22 composite molecular sieves is 1-50%. The catalyst provided by the invention not only can reduce the condensation point of the waxy raw oil but also can improve the yield of liquid products, is particularly used for a lubricating oil distillate isomerization dewaxing process, and has the characteristic that the lubricant base oil is high in viscosity index.

Description

technical field [0001] The invention relates to an alkane 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 choo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J29/80C10G45/64
Inventor 徐会青贾立明王伟刘全杰
Owner CHINA PETROLEUM & CHEM CORP
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