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Method for absorbing residual fumigant sulfuryl fluoride by using ionic liquid composite bio-based solvent

An ionic liquid and solvent absorption technology, applied in separation methods, chemical instruments and methods, gas treatment, etc., can solve the problems of high viscosity, unreported fumigant sulfuryl fluoride tail gas treatment, low vapor pressure, etc., and achieves large absorption capacity. , The effect of stable performance and low viscosity

Active Publication Date: 2020-03-31
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ionic liquids are salts composed of organic cations and inorganic or organic anions, which are in a liquid state at 100°C. They have the characteristics of low vapor pressure, stable chemical properties, strong solubility, liquid state at room temperature, and no secondary pollution. A gas absorbent with excellent performance is widely used in desulfurization, denitrification and other fields, but there is no report on the treatment of fumigant sulfuryl fluoride tail gas
In addition, as a gas absorbent, ionic liquids still have the problem of high viscosity.

Method used

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  • Method for absorbing residual fumigant sulfuryl fluoride by using ionic liquid composite bio-based solvent
  • Method for absorbing residual fumigant sulfuryl fluoride by using ionic liquid composite bio-based solvent
  • Method for absorbing residual fumigant sulfuryl fluoride by using ionic liquid composite bio-based solvent

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] 1) Put 10g of composite solvent (made by uniformly mixing matrine nonanoate and diisooctyl azelate at a molar ratio of 1:1) into an absorption bottle, control the absorption temperature at 20°C, and use 30ml / min The flow rate is to feed sulfuryl fluoride gas into the absorption bottle; the weight of the absorption bottle is weighed every 5 minutes until the constant weight (at this time, the composite solvent is saturated with sulfuryl fluoride gas), and the final concentration of the composite solvent on sulfuryl fluoride is obtained. The absorption capacity is 1.153g sulfuryl fluoride / g composite solvent;

[0020] 2) Transfer the above saturated composite solvent into a 50ml single-mouth bottle (the single-mouth bottle is heated in a water bath, and the opening of the one-mouth bottle is connected to a water pump for vacuuming), and desorbed at a temperature of 70°C and an absolute pressure of 500Pa The operation is to desorb the sulfuryl fluoride absorbed in the comp...

Embodiment 2

[0023] 1) Put 10g of composite solvent (made by uniformly mixing matrine undecanoate and soybean oil methyl ester at a molar ratio of 1:3) into an absorption bottle, control the absorption temperature at 40°C, and flow to the Feed sulfuryl fluoride gas into the absorbing bottle; weigh the weight of the absorbing bottle every 5 minutes until constant weight, and obtain the final absorption of sulfuryl fluoride by the composite solvent to be 0.528g sulfuryl fluoride / g composite solvent;

[0024] 2) Transfer the above saturated composite solvent into a 50ml one-mouth bottle (the one-mouth bottle is heated in a water bath, and the opening of the one-mouth bottle is connected to a water pump for vacuuming), and desorbed at a temperature of 70°C and an absolute pressure of 1000Pa The operation is to desorb the sulfuryl fluoride absorbed in the composite solvent to obtain the regenerated composite solvent, and then continue to apply it to the next absorption process, so as to recycle ...

Embodiment 3

[0027] 1) Put 10g of compound solvent (made by uniformly mixing matrine caproate and triethyl citrate at a molar ratio of 1:7) into an absorption bottle, control the absorption temperature at 50°C, and flow to the Feed sulfuryl fluoride gas into the absorption bottle; weigh the weight of the absorption bottle every 5 minutes until constant weight, and obtain the final absorption of sulfuryl fluoride by the composite solvent to be 0.335g sulfuryl fluoride / g composite solvent;

[0028] 2) Transfer the above-mentioned saturated composite solvent into a 50ml single-mouth bottle (the single-mouth bottle is heated in a water bath, and the opening of the one-mouth bottle is connected to a water pump for vacuuming), and desorbed at a temperature of 80°C and an absolute pressure of 1500Pa The operation is to desorb the sulfuryl fluoride absorbed in the composite solvent to obtain the regenerated composite solvent, and then continue to apply it to the next absorption process, so as to re...

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Abstract

The invention discloses a method for absorbing residual fumigant sulfuryl fluoride by using an ionic liquid composite bio-based solvent. According to the method, sulfuryl fluoride gas is physically absorbed by using an ionic liquid composite bio-based solvent as an absorbent, and the rich solution after sulfuryl fluoride absorbing is desorbed, so that the regeneration of the absorbent can be achieved, wherein the ionic liquid composite bio-based solvent is formed by uniformly mixing a bio-based ionic liquid and a bio-based solvent containing carbonyl groups, and the bio-based ionic liquid is sophocarpidine hexanoate, sophocarpidine heptanoate, sophocarpidine caprylate, sophocarpidine nonanoate, sophocarpidine decanoate, sophocarpidine undecanoate or sophocarpidine tridecanoate. According to the invention, through the organic compounding of the bio-based ionic liquid and the bio-based solvent, the absorption process of sulfuryl fluoride is accelerated from mass transfer driving force and mass transfer coefficient so as to achieve the efficient and environmentally-friendly emission reduction of the residual fumigant sulfuryl fluoride.

Description

technical field [0001] The invention relates to a method for absorbing residual fumigant sulfuryl fluoride by using an ionic liquid compound bio-based solvent. Background technique [0002] The fumigant sulfuryl fluoride replaces the traditional fumigant methyl bromide and is widely used in the fumigation treatment of containers, warehouses, granaries, soils and other fields, and the residual sulfuryl fluoride after fumigation is directly discharged into the atmosphere. According to reports, sulfuryl fluoride is not only harmful to human health, but also a strong greenhouse gas. Therefore, the terminal treatment of the fumigant sulfuryl fluoride is urgent. [0003] In response to the above problems, Chinese patents CN201010256651.9, CN201110445113.9, CN201320395223.3, CN201410477152.0, CN201710630834.4 successively disclosed non-equilibrium plasma method, plasma coupling chemical absorption method, lye chemical absorption method, polymer Adsorption method and biodiesel phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/14
CPCB01D53/1493B01D53/1425B01D2257/204B01D2257/30B01D2252/50
Inventor 梁晓江张竹娇解庆龙段莹吴振宇于尚志卢美贞聂勇计建炳
Owner ZHEJIANG UNIV OF TECH
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