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Ionic liquid catalyst for C5/C6 alkane isomerization and preparation and using method of catalyst

A technology for alkane isomerization and ionic liquids, which is applied in the field of dicationic liquid catalysts, can solve problems such as difficult separation, and achieve the effects of fast reaction speed, high acid strength and mild reaction conditions

Inactive Publication Date: 2014-07-23
CHINA UNIV OF PETROLEUM (EAST CHINA)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention solves the problem that the ionic liquid catalyst used for isomerization in the prior art is not easy to separate, and then provides an ionic liquid catalyst that has excellent isomerization effect and is easy to separate from the product

Method used

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  • Ionic liquid catalyst for C5/C6 alkane isomerization and preparation and using method of catalyst
  • Ionic liquid catalyst for C5/C6 alkane isomerization and preparation and using method of catalyst
  • Ionic liquid catalyst for C5/C6 alkane isomerization and preparation and using method of catalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] The chemical structural formula of the ionic liquid catalyst described in the present embodiment is as follows:

[0036]

[0037] where: R 1 and R 2 Respectively ethyl; X 1 and x 2 AlCl 3 Br - or Al 2 Cl 6 Br -

[0038] The synthetic method of above-mentioned ionic liquid catalyst is as follows:

[0039](1) Dissolve 0.1mol tetramethylethylenediamine and 0.2mol bromoethane in absolute ethanol, stir and react at 60°C for 2h, filter to obtain a white solid, wash 3 times with ethanol, and dry in a vacuum oven for 12h. Obtain the ionic liquid precursor.

[0040] (2) Mix 0.1mol ionic liquid precursor with 0.4molAlCl 3 Add it into an airtight container and mix evenly, and place it at 90° C. for 12 hours to prepare a strongly acidic double-center cationic ionic liquid.

[0041] The concrete operation method that the ionic liquid catalyst described in this embodiment is used for C5 alkane isomerization is:

[0042] (1) Take n-butane chloride and n-pentane by volu...

Embodiment 2

[0048] The chemical structural formula of the ionic liquid catalyst described in the present embodiment is as follows:

[0049]

[0050] where: R 1 and R 2 Respectively ethyl; X 1 and x 2 AlCl 3 Br - or Al 2 Cl 6 Br -

[0051] The synthetic method of above-mentioned ionic liquid catalyst is as follows:

[0052] (1) Dissolve 0.1mol tetramethylethylenediamine and 0.2mol bromoethane in absolute ethanol, stir and react at 80°C for 2h, filter to obtain a white solid, wash with ethanol 3 times, and dry in a vacuum oven for 12h. Obtain the ionic liquid precursor.

[0053] (2) Mix 0.1mol ionic liquid precursor with 0.3molAlCl 3 Add it into an airtight container and mix evenly, and place it at 90° C. for 12 hours to prepare a strongly acidic double-center cationic ionic liquid.

[0054] The concrete operation method that the ionic liquid catalyst described in this embodiment is used for C5 alkane isomerization is:

[0055] (1) take chlorobutane and normal pentane in the...

Embodiment 3

[0061] The chemical structural formula of the ionic liquid catalyst described in the present embodiment is as follows:

[0062]

[0063] where: R 1 and R 2 Respectively ethyl; X 1 and x 2 AlCl 3 Br - or Al 2 Cl 6 Br -

[0064] The synthetic method of above-mentioned ionic liquid catalyst is as follows:

[0065] (1) Dissolve 0.1mol tetramethylethylenediamine and 0.2mol bromoethane in absolute ethanol, stir and react at 80°C for 2h, filter to obtain a white solid, wash with ethanol 3 times, and dry in a vacuum oven for 12h. Obtain the ionic liquid precursor.

[0066] (2) Mix 0.1mol ionic liquid precursor with 0.3molAlCl 3 Add it into an airtight container and mix evenly, and place it at 90° C. for 12 hours to prepare a strongly acidic double-center cationic ionic liquid.

[0067] The method that the ionic liquid catalyst described in the present embodiment is used for C5 alkane isomerization is:

[0068] (1) take chlorobutane and normal pentane in the ratio of vo...

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Abstract

The invention provides an ionic liquid catalyst for C5 / C6 alkane isomerization. The chemical structural formula of the catalyst is as shown in the specification, wherein R1 and R2 are respectively any one of C2-C9 straight chain alkyl; X1 and X2 are respectively any one of AlCl4<-> and Al2Cl7<->, or X1 and X2 are respectively any one of AlCl3Br<-> and Al2Cl6Br<->. When the ionic liquid catalyst provided by the invention is applied to isomerization reaction, a reaction system is of liquid-liquid phase, and the reaction is stable and easy to control. After the reaction is accomplished and a product is cooled to be the room temperature, the ionic liquid catalyst is coagulated to be solid again, and thus being conveniently separated from a liquid phase product.

Description

technical field [0001] The invention belongs to the field of isomerization of light alkanes, and in particular relates to a dication liquid catalyst for catalyzing the isomerization of C5 / C6 alkanes and a preparation and use method thereof. Background technique [0002] With the continuous development of my country's petroleum industry and the continuous improvement of environmental awareness, the quality standards of domestic motor gasoline are also continuously improved. Under this background, it is imperative to develop the production technology of high-octane clean oil products. At present, the processes used to produce high-octane gasoline and its components mainly include catalytic reforming, etherification, alkylation and isomerization. Among them, isomerization technology has been widely used because of its advantages of flexible operation, low investment and low pollution. The isomerized oil prepared by isomerizing light alkanes, especially C5 / C6 alkanes, is a very...

Claims

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Application Information

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IPC IPC(8): B01J31/02C07C211/09C07C209/00C07C9/18C07C9/16C07C5/27
Inventor 夏道宏周文博于建宁朱丽君刘咸尚蔡婷婷周玉路项玉芝
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)
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