Low-carbon alkane isomerization catalyst and preparation method thereof

A low-carbon alkanes and catalyst technology, applied in the field of low-carbon alkanes isomerization catalysts and their preparation, can solve the problems of reducing catalyst activity and stability, shorten residence time, improve activity and isomerization selectivity, avoid Effects of Depth Response

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

Thereby seriously reducing the activity and stability of the catalyst

Method used

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  • Low-carbon alkane isomerization catalyst and preparation method thereof
  • Low-carbon alkane isomerization catalyst and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] 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 I, finally add 55g ZSM-35 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-35) was isolated, numbered S-1, and the weight content of MCM-22 was 25.4%.

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 of deionized water and 3.00g of HMI to the kettle in turn, and finally add 100g of ZSM-35. 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-35) was isolated, numbered S-2, and the weight content of MCM-22 was 11.1%.

Embodiment 3

[0032] 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-35. 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-35) was isolated, numbered S-3, and the weight content of MCM-22 was 6.5%.

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Abstract

The invention discloses a low-carbon alkane isomerization catalyst and a preparation method thereof. The catalyst contains an MCM-22 / ZSM-35 composite molecular sieve and group-VIII precious metal active components, wherein counted by the weight content of the catalyst, the content of the MCM-22 / ZSM-35 composite molecular sieve is 1.0 to 90 percent, the content of group-VIII precious metals is 0.1 to 1.5 percent, an MCM-22 molecular sieve of the MCM-22 / ZSM-35 composite molecular sieve wraps a ZSM-35 molecular sieve, and the weight content of the MCM-22 in the MCM-22 / ZSM-35 composite molecular sieve is 1.0 to 50 percent. The catalyst can shorten the dwell time of a carbonium ion intermediate in pores of the catalyst, improves the activity and isomerization selectivity and stability of the catalyst, and also suppresses secondary reaction such as polymerization coking and the like.

Description

technical field [0001] The invention relates to a low-carbon alkane isomerization catalyst and a preparation method thereof. The catalyst is suitable for the isomerization reaction of small molecular weight normal paraffins, especially the catalyst for the isomerization of C4-C10 normal paraffins and its application, and can be used to produce high-octane gasoline blending components. Background technique [0002] Under certain conditions, n-alkanes are non-ideal components in petroleum products, and the isomerization reaction of n-alkanes is an important reaction in petroleum processing. Especially in catalytic gasoline blended with refinery residue, the content of sulfur and olefins is relatively high. Hydrodesulfurization and olefin reduction of gasoline can reduce the sulfur content to less than 10µg / g and the olefin content to less than 10v%, but at the same time significantly reduce the octane number. To reduce sulfur and olefins with little or no loss of octane, sel...

Claims

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Application Information

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