Isomerization method of light alkanes using ionic liquid as catalyst
An ionic liquid and light alkane technology, which is applied in the field of alkane isomerization, can solve the problems that the conversion rate of raw materials needs to be further improved, the content of isoalkanes is limited, the catalytic activity and selectivity are limited, and the requirements for synthetic raw materials are high, and good catalytic activity can be achieved. and stability, good social and economic benefits, and the effect of reducing production costs
Active Publication Date: 2018-04-06
CHINA UNIV OF PETROLEUM (BEIJING)
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Problems solved by technology
However, the synthesis of ionic liquids has high requirements for synthetic raw materials, the synthesis method is relatively complicated, and the price is relatively expensive; in addition, the catalytic activity and selectivity of the ionic liquids are limited, and the conversion rate of raw materials and the content of isoparaffins in the reaction products are still to be determined. Further improve
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Embodiment 1
[0036] The preparation of a class of ionic liquids
Embodiment 1-1
[0038] Under the protection of dry nitrogen, 0.065 mol (3.84 g) of acetamide was slowly added to 0.1 mol (13.34 g) of AlCl 3 , stirred at room temperature for 30 minutes, then heated up to 80° C., and continued to stir for 2 hours to complete the reaction to obtain an ionic liquid.
Embodiment 1-2
[0040] Under the protection of dry nitrogen, 0.055 mol (4.02 g) of N-methylacetamide was slowly added to 0.1 mol (13.34 g) of AlCl 3 , stirred at room temperature for 30 minutes, then heated up to 60° C., and continued to stir for 3 hours to complete the reaction to obtain a basic ionic liquid. Subsequently, under the protection of dry nitrogen, 0.015 mol (1.48 g) of CuCl was added to the basic ionic liquid and the temperature was raised to 120° C., and the stirring was continued to complete the reaction (completely converted into a liquid), and the ionic liquid was obtained.
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The invention provides a light-weight alkane isomerization method using ion-like liquid as a catalyst. The light-weight alkane isomerization method comprises the following steps that ingredients containing light-weight alkane are in contact with ion-like liquid so that the light-weight alkane takes an isomerization reaction, wherein the ion-like liquid is prepared from an amide compound and more than one kind of metal compound through reaction. The method has the advantages that the ion-like liquid is used as the catalyst; the synthesis raw materials can be easily obtained; the synthesis method is simple; the price is low; in addition, the ion-like liquid has high catalysis activity, high stability and high selectivity; the conversion rate of the light-weight alkane isomerization raw materials catalyzed by the ion-like liquid and the isomerous alkane content in the reaction product are greatly improved.
Description
technical field [0001] The invention relates to a method for isomerizing alkanes, in particular to a method for isomerizing light alkanes using ionic liquids as catalysts. Background technique [0002] In recent years, due to the higher and higher requirements for environmental protection, gasoline quality standards have been developed in the direction of low aromatics, low olefins, low vapor pressure, low sensitivity, high octane number and high oxygen content. Light naphtha (such as straight-run light naphtha, hydrogenation unit light naphtha, etc.) and light condensate (such as oil field light condensate, etc.) are mainly C5 and C6 alkanes, due to the low octane number , so that the blending ratio in gasoline is limited. Through the isomerization reaction of this part of light alkanes, the octane number of light alkanes can be effectively increased, thereby increasing the blending ratio of light alkanes in gasoline, improving the octane number of gasoline light fractions...
Claims
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IPC IPC(8): B01J31/26B01J31/30C07C5/27C07C9/18C07C9/16C07C9/12C10G29/20
CPCB01J31/0247B01J31/26B01J31/30B01J2231/52C07C5/2794C07C2531/26C07C2531/30C10G29/20C10G2300/1037C07C9/18C07C9/16C07C9/12
Inventor 张睿胡鹏程刘植昌孟祥海徐春明刘海燕
Owner CHINA UNIV OF PETROLEUM (BEIJING)
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