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Application of 4-((2-hydroxyethyl)(alkyl)amino)-2-butanol in absorbing acid gas

A technology of acidic gas and hydroxyethyl, which is applied in gas treatment, separation methods, chemical instruments and methods, etc., can solve the problems of weak capture ability, achieve fast absorption rate, large absorption capacity, and simple preparation method

Inactive Publication Date: 2017-02-08
HUNAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The capture ability of acid gases such as carbon dioxide in these existing amine solvents is not strong, and needs to be further improved

Method used

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  • Application of 4-((2-hydroxyethyl)(alkyl)amino)-2-butanol in absorbing acid gas
  • Application of 4-((2-hydroxyethyl)(alkyl)amino)-2-butanol in absorbing acid gas
  • Application of 4-((2-hydroxyethyl)(alkyl)amino)-2-butanol in absorbing acid gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Embodiment 1: the synthetic method of 4-((2-hydroxyethyl) (ethyl) amino)-2-butanol (HEEAB)

[0026]

[0027] Under ice-bath conditions, 89.14 g (1 mol) of 2-(ethylamino)ethanol was added dropwise to 70 g (1 mol) of butenone; stirring was continued for 1 h after the addition was complete. The reaction was stirred for an additional 6 h at room temperature. The mixture was placed under ice-bath conditions again, 30 mL of methanol was added to dilute, 37.9 g (1 mol) of sodium borohydride was added, and stirring was continued for 1 h; after that, the reaction was continued to stir at room temperature for 6 h. Under ice-bath conditions, 30 mL of water was slowly added to the mixture, and stirring was continued for 2 h. The product obtained is filtered to remove sodium borohydride in the product; the product obtained is subjected to vacuum distillation at a temperature of 133-135° C. and under a condition of 20-22 inHg to obtain 87.56 g of the final product 4-((2-hydroxyl ...

Embodiment 2

[0028] Example 2: CO 2 Determination of absorption capacity

[0029] 4-((2-hydroxyethyl)(ethyl)amino)-2-butanol (HEEAB) was formulated into an aqueous solution with a concentration of 2mol / L as a carbon dioxide absorbing liquid, and the CO was controlled under normal pressure of 0.1MPa. 2 The volume fraction is 15% (i.e. CO 2 The partial pressure is 15kPa), 8-10 hours to reach absorption equilibrium, measured the absorption capacity of HEMAB. The test device is prior art, and its structure is as figure 1 shown.

Embodiment 3

[0030] Example 3: CO in absorbed gas 2 Partial pressure inspection

[0031] 4-((2-hydroxyethyl)(ethyl)amino)-2-butanol (HEEAB) was formulated into an aqueous solution with a concentration of 2 mol / L as a carbon dioxide absorbing liquid, and the temperature of the absorbent was controlled at 25°C. Measure the CO of HEEAB under the pressure of 0.1MPa 2 Absorption capacity and CO 2 The relationship between the partial pressure and the CO of the MEA under the same conditions 2 Comparison of absorption capacity, such as figure 2 shown. figure 2 CO as an aqueous solution of 4-((2-hydroxyethyl)(ethyl)amino)-2-butanol (HEEAB) at different partial pressures 2 Absorption capacity and CO of MEA aqueous solution 2 Absorption capacity comparison, ◆ is MEA, ● is HEEAB.

[0032] Depend on figure 2 It can be seen that the HEEAB absorbent can be applied to a wide range of CO 2 Volume fraction (0.5%-99% is feasible, preferably 5%-60%), and in different CO 2 Compared with MEA, it ha...

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Abstract

The invention discloses application of 4-((2-ethoxyl)(methyl)amino)-2-butanol in the aspect of acid gas absorption, the structural formula of the 4-((2-ethoxyl)(methyl)amino)-2-butanol is shown in the picture (please see the chemical formula in the description), wherein R represents alkyl with the carbon atom number of 2-10. A brand-new acid gas absorbing agent 4-((2-ethoxyl)(methyl)amino)-2-butanol is synthesized; a preparation method of the absorbing agent in the acid gas aspect is simple, and the cost is low; the acid gas absorbing agent has larger absorption capacity and higher absorption rate and is particularly suitable for absorption of carbon dioxide.

Description

technical field [0001] The invention relates to the application of 4-((2-hydroxyethyl)(alkyl)amino)-2-butanol in absorbing acid gas, and belongs to the technical field of acid gas absorbent. Background technique [0002] In recent years, the global climate change caused by the greenhouse effect has increasingly threatened the survival and development of human beings, and carbon dioxide is recognized as one of the most important greenhouse gases. [0003] At present, there are mainly three carbon capture technologies: pre-combustion capture, oxyfuel combustion capture and post-combustion capture. Post-combustion capture technology is the most mature technology that is feasible for current economic development. Post-combustion flue gas decarbonization technology mainly includes chemical absorption. method, physical adsorption method and membrane separation method. [0004] In the chemical solvent absorption method, organic amine solvents are widely used in industrial scale pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
CPCB01D53/1456B01D53/1475B01D53/1493B01D2252/202B01D2252/204B01D2252/20489B01D2258/0283Y02C20/40
Inventor 梁志武刘贺磊素德卡暖·辛托苏帕瓦·坦塔亚努童柏栋崴法尔·伊迪梅
Owner HUNAN UNIV