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Method and device for measuring absorbing capacity of organic solvent volatile gas in ion liquid

A technology of organic solvents and ionic liquids, which is applied in the field of devices for measuring the absorption of volatile gases of organic solvents in ionic liquids, and can solve the problems of small amount of analysis and inability to make natural volatilization of organic solvents, etc.

Inactive Publication Date: 2007-09-19
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to provide a device for measuring the absorption of organic solvent volatile gas in ionic liquids. This device can overcome the shortcomings of traditional organic solvent absorption devices such as small analysis volume, no stirring, or the inability to make natural volatilization of organic solvents.

Method used

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  • Method and device for measuring absorbing capacity of organic solvent volatile gas in ion liquid
  • Method and device for measuring absorbing capacity of organic solvent volatile gas in ion liquid
  • Method and device for measuring absorbing capacity of organic solvent volatile gas in ion liquid

Examples

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Effect test

Embodiment 1

[0061] Embodiment 1, under constant pressure, ionic liquid [bmim] [PF 6 ] Measurement of Absorption of Butyl Acetate Vapor by Absorbent

[0062] 100ml butyl acetate is placed in steam generator 9 among Fig. 1, 35g ionic liquid [bmim][PF 6 ] Placed in the steam absorber 12, connect the steam generator and the absorber through the flanges 11, 11', open the upper and lower connecting valves 4, 3, control the temperature in a water bath constant temperature bath, keep the temperature at 20°C, and vacuumize. The steam absorber and the steam generator are kept in communication, and the organic solvent vapor diffuses into the absorber to be absorbed in the ionic liquid. After a period of time, close the upper and lower connection valves 4, 3, open the flanges 11 and 11 ', and take off the vapor absorber 12 for weighing. Samples were taken and weighed at different times to obtain butyl acetate volatile gas in the ionic liquid [bmim][PF 6 ] in the absorption curve with time. Figure...

Embodiment 2

[0063] Embodiment 2, under constant pressure, ionic liquid [bmim] [PF 6 ] Absorption of n-butanol volatile gas by absorbent

[0064] Put 100ml n-butanol in steam generator 9, 35g ionic liquid [bmim][PF 6 ] Placed in the steam absorber 12, connect the steam generator and the absorber through the flanges 11, 11', open the upper and lower connecting valves 4, 3, control the temperature in a water bath constant temperature bath, keep the temperature at 20°C, and vacuumize. The steam absorber and the steam generator are kept in communication, and the organic solvent vapor diffuses into the absorber to be absorbed in the ionic liquid. After a period of time, close the upper and lower connection valves 4, 3, open the flanges 11 and 11 ', and take off the vapor absorber 12 for weighing. Samples were taken and weighed at different times to obtain the volatile gas of n-butanol in the ionic liquid [bmim][PF 6 ] in the absorption curve with time. Figure 4 shows the volatile gas of n-b...

Embodiment 3

[0065] Embodiment 3, under constant pressure, ionic liquid [bmim] [BF 4 ] Measurement of Absorption of Toluene Vapor by Absorbent

[0066] 100ml of toluene is placed in the steam generator 9 among Fig. 1, 35g of ionic liquid [bmim][BF 4 ] Placed in the steam absorber 12, connect the steam generator and the absorber through the flanges 11, 11', open the upper and lower connecting valves 4, 3, control the temperature in a water bath constant temperature bath, keep the temperature at 20°C, and vacuumize. The steam absorber and the steam generator are kept in communication, and the organic solvent vapor diffuses into the absorber to be absorbed in the ionic liquid. After a period of time, close the upper and lower connection valves 4, 3, open the flanges 11 and 11 ', and take off the vapor absorber 12 for weighing. Samples were taken and weighed at different times to obtain the toluene volatile gas in the ionic liquid [bmim][BF 4 ] in the absorption curve with time. Figure 5 s...

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Abstract

The present invention relates to a method and apparatus used for measuring the absorbing amount of an organic solvent volatile gas in an ionic liquid. Said apparatus comprises an evaporator used for a natural evaporation of an organic solvent and an absorber used for adsorbing natural volatile gases of a variety of organic solvents utilizing an ionic liquid as an absorbing agent to achieve the intention that an ionic liquid is used as an absorbing agent to remove organic solvents in industrial waste gas. A weighing method is utilized to perform detections, then the transient absorbing capacity and saturated absorbing capacity of an organic volatile gas in an ionic liquid are got through the mass difference after and before the absorption by the absorbing agent. The channel valve adopts a rotary switch type valve, which is capable of both increasing the flux and decreasing the valve weight at the same time to ensure the weighing precision. The absorber is equipped with a magnetic stirring therein and the adsorbing process is a deep absorption.

Description

technical field [0001] The invention relates to a device for measuring the absorption of organic solvent volatile gas in ionic liquid, in particular to a device for absorbing natural volatile gas of organic solvent in ionic liquid and measuring the instantaneous absorption and saturated absorption in ionic liquid . technical background [0002] In petroleum, chemical and pharmaceutical fields, the use of organic solvents is very common, such as benzene, toluene, butyl acetate, ethyl acetate, methylene chloride, butanol, etc. These organic solvents generally have disadvantages such as low boiling point, high volatility, and difficulty in recycling, which have caused huge economic losses and environmental pollution. [0003] At present, the research methods for removing volatile organic solvent vapor mainly include combustion method, adsorption method, absorption method, biodegradation treatment, membrane filtration treatment, compression method and so on. There are difficul...

Claims

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Application Information

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IPC IPC(8): G01N5/02
Inventor 江洋洋郭晨余江刘会洲安震涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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