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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: 2009-06-10
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0061] Example 1. Under constant pressure, ionic liquid [bmim][PF 6 ]Measurement of absorption of butyl acetate vapor by absorbent

[0062] Put 100ml of butyl acetate in figure 1 In the steam generator 9, 35g ionic liquid [bmim][PF 6 ] Put it in the steam absorber 12, connect the steam generator and absorber through flanges 11, 11', open the upper and lower connecting valves 4, 3, the temperature of the water bath thermostatic bath is controlled, the temperature is 20℃, and the vacuum is drawn. Keep the vapor absorber and the steam generator connected, and the organic solvent vapor diffuses into the absorber and is absorbed in the ionic liquid. After a period of time, the upper and lower connecting valves 4 and 3 are closed, the flanges 11 and 11' are opened, and the steam absorber 12 is removed for weighing. Sampling and weighing at different times to obtain the volatile gas of butyl acetate at 20℃ in the ionic liquid [bmim][PF 6 ] In the curve of absorption over time. image 3 ...

Embodiment 2

[0063] Example 2. Under constant pressure, ionic liquid [bmim][PF 6 ]Measurement of absorption of n-butanol volatile gas by absorbent

[0064] Put 100ml of n-butanol in the steam generator with 9 weights, 35g of ionic liquid [bmim][PF 6 ] Put it in the steam absorber 12, connect the steam generator and absorber through flanges 11, 11', open the upper and lower connecting valves 4, 3, the temperature of the water bath thermostatic bath is controlled, the temperature is 20℃, and the vacuum is drawn. Keep the vapor absorber and the steam generator connected, and the organic solvent vapor diffuses into the absorber and is absorbed in the ionic liquid. After a period of time, the upper and lower connecting valves 4 and 3 are closed, the flanges 11 and 11' are opened, and the steam absorber 12 is removed for weighing. Sampling and weighing at different times to obtain the n-butanol volatilized gas in the ionic liquid [bmim][PF 6 ] In the curve of absorption over time. Figure 4 It is th...

Embodiment 3

[0065] Example 3. Under constant pressure, ionic liquid [bmim][BF 4 ]Measurement of absorption of toluene vapor by absorbent

[0066] Put 100ml of toluene in figure 1 In the steam generator 9, 35g ionic liquid [bmim][BF 4 ] Put it in the steam absorber 12, connect the steam generator and absorber through flanges 11, 11', open the upper and lower connecting valves 4, 3, the temperature of the water bath thermostatic bath is controlled, the temperature is 20℃, and the vacuum is drawn. Keep the vapor absorber and the steam generator connected, and the organic solvent vapor diffuses into the absorber and is absorbed in the ionic liquid. After a period of time, the upper and lower connecting valves 4 and 3 are closed, the flanges 11 and 11' are opened, and the steam absorber 12 is removed for weighing. Sampling and weighing at different times to obtain the toluene volatilized gas in the ionic liquid [bmim] [BF 4 ] In the curve of absorption over time. Figure 5 For toluene volatilized...

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

Claims

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Application Information

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Patent Type & Authority Patents(China)
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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