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Method for high temperature dissolving of gas-state hydrocarbon by using fluorine-containing ionic liquid

A hydrocarbon and ionic liquid technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of large changes in methane dissolution with temperature, which are not in line with the actual situation, and achieve simple preparation and stable physical and chemical properties. Effect

Active Publication Date: 2017-05-31
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Second, the dissolution of methane in ionic liquids varies too much with temperature, which is not in line with the actual situation

Method used

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  • Method for high temperature dissolving of gas-state hydrocarbon by using fluorine-containing ionic liquid
  • Method for high temperature dissolving of gas-state hydrocarbon by using fluorine-containing ionic liquid
  • Method for high temperature dissolving of gas-state hydrocarbon by using fluorine-containing ionic liquid

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] To illustrate the dissolution effect of methane in 1-butyl-3-methylimidazolium perfluorobutanesulfonate [Bmim][PFBS] at 140°C.

[0034] Weigh 15ml of 1-butyl-3-methylimidazole perfluorobutyl sulfonate [Bmim][PFBS] in a 55ml reaction kettle, stir for 10 minutes under vacuum, and fill the gas storage tank with 4MPa, 3MPa, 2MPa , 1MPaCH 4 , after the pressure and temperature are stabilized, the gas in the gas storage tank is filled into the reactor, the temperature is controlled at 140°C, and stirred, and the pressure and temperature are stabilized after the absorption of methane is balanced (dissolving equipment see figure 1 ).

[0035] The amount of methane absorbed is calculated by the volumetric pressure and temperature of each tank, and the absorbed amount under four groups of different pressures is further converted into Henry's constant. The results obtained are shown in Table 1:

[0036] Table 1 Solubility of methane at 140°C in [Bmim][PFBS]

[0037]

[0038] ...

Embodiment 2

[0040] Explain that under 140 ℃ methane in 1-ethyl-3-methylimidazolium trifluoro (trifluoromethyl) borate [Bmim] [CF 3 BF 3 ] in the dissolution effect.

[0041] The experimental method is the same as that in Example 1, and under 140°C, methane is measured in 1-ethyl-3-methylimidazolium trifluoro(trifluoromethyl)borate [Bmim][CF 3 BF 3 ], calculate the Henry constant. The results obtained are shown in Table 2:

[0042] Table 2[Bmim][CF 3 BF 3 ] Solubility of methane at 140°C

[0043]

[0044] Examples 1-2 illustrate the dissolution and absorption of methane by different alkyl fluoride modified ionic liquids.

Embodiment 3

[0046] To illustrate the dissolution effect of methane in 1-butyl-3-methylimidazolium perfluorobutane sulfonate [Bmim][PFBS] at 60°C.

[0047] The experimental method is the same as that in Example 1. The solubility of methane in 1-butyl-3-methylimidazolium perfluorobutane sulfonate [Bmim][PFBS] at 60°C is measured, and the Henry constant is calculated. The results obtained are shown in Table 3:

[0048] Table 3 Solubility of methane in [Bmim][PFBS] at 60°C

[0049]

[0050] From 60°C to 140°C, as the temperature changes in a wide range, it has little effect on the solubility of methane in the fluorine-containing ionic liquid designed in the present invention. The ionic liquid can maintain high methane solubility at high temperatures, and at this temperature, most Water and organic reagents have reached the boiling point or decomposed, and the invention of using ionic liquids to stably dissolve gaseous hydrocarbons at high temperatures can be applied to the efficient utili...

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Abstract

The present invention provides a method for high temperature dissolving of a gas-state hydrocarbon by using a fluorine-containing ionic liquid, and belongs to the technical field of chemical industry dissolving. According to the method, the dissolving process is performed with a high pressure device, an ionic liquid is added, gas to be dissolved is filled, and the high temperature dissolving of a gas-state hydrocarbon is achieved, wherein the fluorine-containing ionic liquid can be a cationic alkyl fluorine modified ionic liquid, an anionic alkyl fluorine modified ion liquid or a zwitterionic alkyl fluorine modified ion liquid. According to the present invention, the fluorine-containing ionic liquid has stable physical and chemical properties, is easily prepared, can be used for the hydrocarbon dissolving conversion system, can increase the dissolving effect by 40 times compared to the aqueous phase system, and can further be used for the storage and the transportation of gas-state hydrocarbons.

Description

technical field [0001] The invention belongs to the technical field of chemical dissolution, and in particular relates to a method for dissolving gaseous hydrocarbons at high temperature using fluorine-containing ionic liquids. Background technique [0002] Hydrocarbons are the main energy components, and the activation and product conversion of C–H bonds have been favored. With the discovery and exploitation of a large amount of shale gas in the past decade, the dissolution and conversion of hydrocarbons such as methane and ethane have become a top priority. [0003] Taking methane as an example, the conversion of methane mainly includes heterogeneous conversion and homogeneous conversion. In the heterogeneous conversion, Bao Xin and his teacher from Dalian Chemical Institute mentioned in the direct non-oxidative conversion of methane that efficient conversion of methane to ethylene and aromatics can be achieved, but the temperature is extremely harsh, up to 1173K. The se...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1487B01D53/1493B01D2252/30B01D2257/7022B01D2257/7025Y02C20/20
Inventor 张宗超黄婷玉颜佩芳许占威刘秀梅
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI