4-((2-hydroxyethyl)(methyl)amino)-2-butanol and preparation method thereof

A technology of methylaminoethanol and hydroxyethyl, which is applied in the field of 4-amino)-2-butanol and its preparation, can solve problems such as weak capture ability, achieve fast absorption rate, large absorption capacity and simple preparation method. Effect

Inactive Publication Date: 2016-10-12
HUNAN UNIV
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  • 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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  • 4-((2-hydroxyethyl)(methyl)amino)-2-butanol and preparation method thereof
  • 4-((2-hydroxyethyl)(methyl)amino)-2-butanol and preparation method thereof
  • 4-((2-hydroxyethyl)(methyl)amino)-2-butanol and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Example 1: Synthesis method of 4-((2-hydroxyethyl)(methyl)amino)-2-butanol (HEMAB)

[0022]

[0023] Under ice bath conditions, 75.11g (1mol) of 2-methylaminoethanol was added dropwise to 70g (1mol) of butenone; after the addition, the stirring was continued for 1h. The reaction was stirred at room temperature (20-30°C) for 6 hours. The mixture was placed in an ice bath again, diluted with 30 mL of methanol, 37.9 g (1 mol) of sodium borohydride was added, and stirring was continued for 1 h; then the reaction was stirred at room temperature for 6 h. Under ice bath conditions, slowly add 30 mL of water to the mixture and continue to stir for 2 h. The obtained product was filtered to remove the sodium borohydride in the product; the obtained product was subjected to vacuum distillation at a temperature of 133-135°C and a condition of 20-22 inHg to obtain 4.55 g of the final product 4-((2-hydroxyl Ethyl)(methyl)amino)-2-butanol, the yield was 57.48%. The 4-((2-hydroxyethyl)...

Embodiment 2

[0024] Example 2: CO 2 Determination of absorption capacity

[0025] 4-((2-Hydroxyethyl)(methyl)amino)-2-butanol (HEMAB) is formulated into an aqueous solution with a concentration of 2mol / L as a carbon dioxide absorption liquid, and the CO is controlled under the condition of normal pressure of 0.1MPa 2 The volume fraction is 15% (ie CO 2 The partial pressure is 15kPa), the absorption equilibrium is reached within 8-10 hours, and the absorption capacity of HEMAB is measured. The test device belongs to the prior art, and its structure is as figure 1 Shown.

Embodiment 3

[0026] Example 3: CO in the gas to be absorbed 2 Partial pressure investigation

[0027] 4-((2-Hydroxyethyl)(methyl)amino)-2-butanol was formulated into an aqueous solution with a concentration of 2mol / L as a carbon dioxide absorption liquid, and the temperature of the absorbent was controlled to 25°C and 0.1MPa at normal pressure Next, measure the CO of HEMAB 2 Absorption capacity and CO 2 The relationship between the partial pressure and the CO of MEA under the same conditions 2 Comparison of absorption capacity, such as figure 2 Shown. figure 2 Is the CO of the aqueous solution of 4-((2-hydroxyethyl)(methyl)amino)-2-butanol under different partial pressures 2 Absorption capacity and CO of MEA aqueous solution 2 Comparison of absorption capacity, ◆ is MEA, ● is HEMAB.

[0028] by figure 2 It can be seen that HEMAB absorbent can be applied to a wide range of CO 2 Volume fraction (0.5%-99% is acceptable, preferably 5%-60%), and in different CO 2 Under partial pressure, it has a l...

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Abstract

The invention discloses 4-((2-hydroxyethyl)(methyl)amino)-2-butanol and a preparation method of the 4-((2-hydroxyethyl)(methyl)amino)-2-butanol. The structural formula of the 4-((2-hydroxyethyl)(methyl)amino)-2-butanol is shown in the description. According to the invention, the brand-new acidic gas absorbent 4-((2-hydroxyethyl)(methyl)amino)-2-butanol is synthesized; the preparation method of the acidic gas absorbent is simple and convenient, and is low in cost; the acidic gas absorbent has a larger absorption capacity and a greater absorption rate, and is especially suitable for the absorption of carbon dioxide.

Description

Technical field [0001] The invention relates to 4-((2-hydroxyethyl)(methyl)amino)-2-butanol and a preparation method thereof, and belongs to the technical field of acid gas removal. Background technique [0002] In recent years, the global climate change caused by the greenhouse effect has increasingly threatened the survival and development of mankind, 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, oxy-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 production processes due to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C215/12C07C213/00B01D53/14
CPCB01D53/1475B01D53/1493B01D2252/202C07C215/12Y02C20/40Y02P20/151Y02P20/50
Inventor 梁志武素德卡暖·辛托苏帕瓦·坦塔亚努童柏栋崴法尔·伊迪梅刘贺磊
Owner HUNAN UNIV
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