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Absorber preparation method

An absorbent and mixing technology, applied in the field of absorbent preparation, can solve the problems of loss of absorption capacity, low cost, complex synthesis method, etc., and achieve the effects of improving absorption capacity, short equilibration time, and reducing cost

Active Publication Date: 2013-12-04
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In recent years, due to the increasingly serious pollution of acidic harmful gases and the limitations of existing treatment technologies, many people consider using ionic liquids as solvents for absorbing acidic gases. 2 Ionic liquids with higher capacity include alcohol amine ionic liquids, imidazole ionic liquids, guanidine ionic liquids, and quaternary phosphonium salt ionic liquids. Among them, alcohol amine ionic liquids are low in cost and have a low impact on SO 2 The absorption capacity is up to 0.98 moles of SO per mole of ionic liquid 2 , but the absorption equilibrium needs 1h to reach, but the absorption capacity of the ionic liquid has a significant loss in the circulation; 2 The absorption capacity of amines is generally higher than that of alcohol amine ionic liquids, which contain imidazole ionic liquids of ether bonds, but the synthesis method of this type of ionic liquids is complicated, and the cost of ionic liquids is relatively high; 2 The absorption capacity is also higher than that of alcohol amine ionic liquids. The synthesis method of this type of ionic liquid is simple, and the separation and purification are easy, but the guanidine monomers required for synthesis are very expensive; 2 It also has a high absorption capacity, but this type of ionic liquid requires multi-step synthesis, and the cost of ionic liquid monomers is very expensive

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] The preparation method of the absorbent described in this example is: mixing ethanolamine ionic liquid and 1,8-diazabicyclo[5.4.0]undec-7-ene in a molar ratio of 1:1;

[0017] Wherein, the preparation method of ethanolamine ionic liquid is as follows: under normal temperature and pressure, in ethanolamine solution, drip sulfamic acid solution while stirring, drop in 45min minutes, the mol ratio of ethanolamine solution and sulfamic acid solution is 1: 1. The reaction time is 10 hours. After the reaction is complete, the product obtained after the reaction is washed with ethanol, and the washing is repeated three times. The washed product is placed in a vacuum drying oven at 60°C for 24 hours, and the ethanolamine ionic liquid is obtained after drying.

[0018] The absorbent described in this example is used to absorb SO 2 , the specific steps are as follows, at normal temperature and pressure with a gas flow of 60ml / min SO 2 The gas is passed into the absorbent, and th...

Embodiment 2

[0022] The preparation method of the absorbent described in this example is: mixing the diethanolamine ionic liquid and 1,8-diazabicyclo[5.4.0]undec-7-ene in a molar ratio of 2:1;

[0023] Wherein, the preparation method of diethanolamine ionic liquid is as follows: under normal temperature and pressure, in diethanolamine solution, dropwise add sulfamic acid solution while stirring, drop in 50min minutes, the mol ratio of diethanolamine solution and sulfamic acid solution The reaction time is 1:1, and the reaction time is 24h. After the reaction is complete, wash the product obtained after the reaction with ethanol, repeat the washing three times, and dry the washed product in a vacuum oven at 75°C for 20 hours. After drying, diethanolamine ionic liquid.

[0024] The absorbent described in this example is used to absorb SO 2 , the specific steps are as follows, at normal temperature and pressure with a gas flow of 60ml / min SO 2 The gas is passed into the absorbent in the abs...

Embodiment 3

[0028] The preparation method of the absorbent described in this example is: mixing the triethanolamine ionic liquid and 1,8-diazabicyclo[5.4.0]undec-7-ene in a molar ratio of 1:1.

[0029] Wherein, the preparation method of triethanolamine ionic liquid is as follows: under normal temperature and pressure, in triethanolamine solution, dropwise add sulfamic acid solution while stirring, drop in 60min minutes, the mol ratio of triethanolamine solution and sulfamic acid solution The reaction time is 1:1, and the reaction time is 48 hours. After the reaction is complete, wash the product obtained after the reaction with ethanol, repeat the washing three times, and dry the washed product in a vacuum oven at 90°C for 18 hours. After drying, triethanolamine is obtained ionic liquid.

[0030] The absorbent described in this example is used to absorb SO 2 , the specific steps are as follows, at normal temperature and pressure with a gas flow of 80ml / min SO 2 The gas is passed into th...

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Abstract

The invention discloses an absorber preparation method. The method includes mixing alcohol amine ion liquid and 1,8-diazabicyclo [5.4.0]+-carbon-7-alkene according to a molar ratio of 1:1-2:1, wherein the alcohol amine ion liquid is prepared by ethanol amine, diethanol amine or triethanol amine and a sulfamic acid solution. Using an absorber to absorb SO2 at normal temperature and normal pressure is high absorbing efficiency, balancing time can be reduced, and absorption can be performed by recycling the absorber.

Description

Technical field [0001] The present invention involves a method of preparation of an absorbent, which belongs to the field of chemical technology. Background technique [0002] Ionic liquid is composed of organic yang ions and anion. At room temperature, salt is liquid, and ionic liquid is used as an emerging solvent and reaction medium. Due to its unique physical chemical properties such as volatilization and structure, the structure can be separated and separated.The fields of catalytic reactions and other fields are widely used, and it is expected to replace traditional organic solvents that are volatile to the environment in the 21st century. [0003] In recent years, due to the increasingly severe pollution of acid -harmful gas, and the limitations of existing treatment technology, many people consider using ionic liquid as solvents that absorb acid gas. 2 Ionic liquids with higher capacity include alcohol -like ionic liquid, imidazole -like ionic liquid, molten ionic liquid,...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/50
Inventor 瞿广飞简荣龙李江纳黄希陆俏丽宁平
Owner KUNMING UNIV OF SCI & TECH