Method for catalyzing butene oligomerization by using ionic liquid as catalyst

A technology for catalyzing butene and ionic liquid with a catalyst, applied in the petrochemical field, can solve problems such as unsatisfactory controllability of oligomerization product distribution, unsatisfactory product distribution control, and inability to produce olefins, etc., and achieve good social effects, steam The effect of depression and short reaction time

Inactive Publication Date: 2008-06-04
CHINA UNIV OF PETROLEUM (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method cannot be used to produce lower molecular weight olefins such as C8, C12, C16 and C20
[0012] It can be seen that the ionic liquid catalysts used in the above-mentioned previously disclosed technology to catalyze the oligomerization of butene are mostly concentrated in imidazole-type or pyridine-type ionic liquids, and the amount used in the polymerization reaction is relatively large, while the use of imidazole-type or pyridine The product distribution of pyridine-type ionic liquid catalyst butene oligomerization is mainly concentrated in dimer (C8) and trimer (C12), and the product distribution of tetramer (C16) and pentamer (C20) is very low or even absent. Unsatisfactory controllability of poly product distribution
Therefore, according to the records of these prior art, the use of ionic liquids to catalyze the oligomerization of butene either because of the price factor limits its application or the control of product distribution is not ideal, and there is still room and demand for further exploration in industrial production.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Triethylamine hydrochloride ([(C 2 h 5 ) 3 NH]Cl) and aluminum trichloride (AlCl 3 ) are mixed at a molar ratio of 1:2, stirred at room temperature for 30-40 minutes, then raised to about 100° C., and continuously stirred at this temperature for about 4-6 hours to form an ionic liquid. cooling, that is, the base ionic liquid (([(C 2 h 5 ) 3 NH]Cl) / AlCl 3 ). Collected in a desiccator for later use.

Embodiment 2

[0043] Triethylamine hydrochloride ([(C 2 h 5 ) 3 NH]Cl) and ferric chloride (FeCl 3 ) in a molar ratio of 1:2 and stirred at room temperature for 30 to 40 minutes. Then the temperature was raised to about 100° C., and stirring was continued at this temperature for about 4 to 6 hours to form an ionic liquid. cooling, that is, the base ionic liquid (([(C 2 h 5 ) 3 NH]Cl) / FeCl 3 ). Collected in a desiccator for later use.

Embodiment 3

[0045] In the basic ionic liquid of embodiment 1, add the second metal compound CuSO 4 , CuSO 4 with AlCl 3 The molar ratio is 1:5, continue to raise the temperature to about 180-200°C, and stir for about 5-6 hours until the metal compound (CuSO 4 ) is also fully involved in the reaction (CuSO 4 Solid completely disappears and transforms into liquid), promptly obtains composite ionic liquid (([(C 2 h 5 ) 3 NH]Cl / AlCl 3 / CuSO 4 ).

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PUM

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Abstract

The invention discloses a method of producing medium and mid-high olefines, such as C8, C12, C16 and C20, etc. with ionic liquid as catalyst to catalyze butylene to carry out butylene oligomerization. The method adopts the butylene as raw material; cation of the ionic liquid catalyst comes from hydrohalide of amine with alkyl, and anion of the ionic liquid catalyst is produced by a metallic compound that has one or two metals. In the technique of the invention, volume ratio of catalyst to butylene is low; conversion efficiency of butylene is high; selectivity of oligomerized product is high; distribution of oligomerized product is improved, and the invention has good social and economic benefits.

Description

technical field [0001] The invention relates to a method for butene oligomerization, in particular to a method for producing C8, C12, C16 and C20 olefins by using ionic liquid as a catalyst to catalyze butene oligomerization, and belongs to the field of petrochemical industry. Background technique [0002] The oligomerization products of butene include medium and high carbon olefins such as C8, C12, C16 and C20, which are very important chemical raw materials and organic chemical intermediates, and have a wide range of uses. For example: C8 (dimer) and C12 (trimer) olefins are intermediates for the preparation of alkylphenol surfactants, PVC plastic plasticizers, epoxy resin curing agents and lubricating oil additives, and can also produce oligomerized gasoline and diesel; high-carbon olefins (trimers or tetramers) with a carbon number greater than or equal to 12, especially less branched high-carbon olefins are widely used in synthetic detergents, oil additives, plasticizer...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C2/08C07C11/00
Inventor 刘植昌孟祥海杨淑清徐春明
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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