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Porous solid supported ionic liquid for adsorption of HCl gas

A technology of porous solids and ionic liquids, applied in gas treatment, separation methods, dispersed particle separation, etc., to achieve good separation effect, simple analysis and desorption, and excellent selective adsorption performance

Inactive Publication Date: 2018-02-02
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is no report on the adsorption material with high selective adsorption effect on HCl in the mixed gas containing HCl.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] Select columnar activated carbon as the carrier, its particle size is 10 mesh, the ash content is 5.0wt%, and the specific surface area is 1000m 2 / g, the pore volume is 0.55mL / g, and the activated carbon is vacuum-dried at 60°C for 20h. After fully mixing 12.5g of water and 25g of N-hexylpyridinium chloride salt, add an appropriate amount of water to make the volume to 55ml. At 10°C, under the action of ultrasonic waves, add the mixed solution dropwise to 100g of activated carbon carrier, and immerse it under the action of ultrasonic waves. After 12 hours, the impregnated catalyst was heated in vacuum at 100° C. for 24 hours to obtain a supported ionic liquid material A, with an ionic liquid loading of 25%.

[0042] Put 2g of loaded ionic liquid material A into the fixed bed absorption tower, and then feed HCl / C at 20°C 2 h 2 Mixed gas, wherein the pressure of the mixed gas is 0.2MPa, the volume content of HCl is 10%, and the volume space velocity of the mixed gas is...

Embodiment 2

[0044] Columnar mesoporous carbon is selected as the carrier, the particle size is 60 mesh, the ash content is 2.0wt%, and the specific surface area is 1200m 2 / g, with a pore volume of 1.2mL / g, the mesoporous carbon was first vacuum-dried at 100°C for 6h. Mix 100g of methanol and 40g of N-butyl-N-methylpyrrolidinium bromide, add an appropriate amount of water to make the volume to 120ml, and add the mixture dropwise to 100g of mesoporous carbon carrier under the action of ultrasonic waves at 40°C. The impregnation time was 1 h under the action of ultrasonic waves, and the impregnated catalyst was heated in vacuum at 140° C. for 8 h to obtain a supported ionic liquid material B, with an ionic liquid loading of 40%.

[0045] Put 2g of loaded ionic liquid material B into the fixed bed absorption tower, and then feed HCl / C at 10°C 2 h 2 Mixed gas, wherein the pressure of the mixed gas is 0.4MPa, the volume content of HCl is 40%, and the volume space velocity of the mixed gas is...

Embodiment 3

[0047] Select columnar carbon nanotubes as the carrier, the particle size is 80 mesh, the ash content is 3.5wt%, and the specific surface area is 500m 2 / g, the pore volume is 0.55mL / g, and the carbon nanotubes are vacuum-dried at 120°C for 3h. Mix 20 g of acetonitrile and 8 g of 1-butyl-3-methylimidazolium chloride salt, add an appropriate amount of water to make the volume to 55 ml, and add the mixed solution dropwise to 100 g of carbon nanotube carriers under the action of ultrasonic waves at 20 ° C. The impregnation time was 7 hours under the action of ultrasonic waves, and the impregnated catalyst was heated in vacuum at 160° C. for 12 hours to obtain a supported ionic liquid material C with an ionic liquid loading of 8%.

[0048] Put 2g of loaded ionic liquid material C into the fixed bed absorption tower, and then feed HCl / C at 15°C 2 h 2 Mixed gas, wherein the mixed gas pressure is 1.1MPa, the volume content of HCl is 60%, and the volume space velocity of the mixed g...

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Abstract

The invention disclosed a porous solid supported ionic liquid and application thereof in adsorption of HCl gas, the porous solid supported ionic liquid comprises a porous solid support and an ionic liquid supported on the support, the porous solid support is activated carbon, mesoporous carbon, carbon nanotubes, silicon oxide, aluminum oxide, titanium oxide, a molecular sieve, a metal organic framework compound or a covalent organic framework compound; the ionic liquids is imidazole, pyridine, quaternary phosphonium and pyrrolidinium ionic liquid, the Ionic liquid loading amount is 1 to 50% based on the mass of the porous solid support. The porous solid supported ionic liquid can be used for adsorbing of the HCl gas, and is used in typical occasions for adsorbing of the HCl gas in industrial exhaust gas of vinyl chloride synthesis by HCl / C2H2 mixed gas and ethyne hydrochlorination for enriching or separating recovering of the HCl. The adsorption rate of the HCl is up to 99.97%, and thepurity of HCl thus obtained is high, up to 99.999%.

Description

technical field [0001] The invention relates to the fields of gas enrichment, separation, recovery and purification, in particular to a porous solid-loaded ionic liquid that absorbs HCl gas. Background technique [0002] In the industry of acetylene hydrochlorination to vinyl chloride, there is a mixed gas containing HCl, such as HCl / C 2 h 2 Mixed gas, vinyl chloride industrial tail gas, etc. It is a difficult problem to separate HCl gas from these mixed gases. In industry, the low-concentration HCl in the vinyl chloride industrial tail gas is usually absorbed and removed by alkali solution. Although this method is simple, HCl is converted into chloride salt with low added value and cannot be recycled, and it increases the discharge of waste liquid. [0003] Adsorption separation is a commonly used method for separating and recovering valuable gas from mixed gas. This method relies on the selective adsorption of specific gases by adsorption materials and realizes adsorpti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B7/07B01D53/02
CPCB01D53/02B01D2253/102B01D2253/104B01D2253/106B01D2253/108B01D2253/1124B01D2253/116B01D2253/20B01D2253/204B01D2253/25B01D2256/26B01D2259/40094C01B7/0718C01B7/0725Y02P20/54
Inventor 李小年赵佳张群峰丰枫翟媛媛
Owner ZHEJIANG UNIV OF TECH
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