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Hydramine and trifluoromethanesulfonic acid alkali metal salt combination solution as well as preparation method and application thereof

A technology of trifluoromethanesulfonic acid base and fluoromethanesulfonic acid base, which can be used in chemical instruments and methods, separation methods, dispersed particle separation and other directions, and can solve the problems of high preparation cost, complicated preparation process, and unsuitable for large-scale promotion. , to achieve the effect of high thermal stability

Active Publication Date: 2015-06-17
SHAOXING UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the raw materials and preparation costs of this type of ionic liquid are relatively expensive, and the preparation process is relatively complicated. At the same time, its ability to absorb carbon dioxide will decrease with the increase of the absorption temperature. Weak, not yet suitable for large-scale promotion in industrial processes

Method used

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  • Hydramine and trifluoromethanesulfonic acid alkali metal salt combination solution as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Preparation of mixed solution of alcohol amine and trifluoromethanesulfonic acid alkali metal salt: add trifluoromethanesulfonic acid alkali metal salt to equimolar alcohol amine in batches, under sealed conditions, 80-120 ° C, stir for 48 hours, A hybrid solution absorbent for capturing carbon dioxide is prepared. Among them, the molar ratio of alcohol amine to alkali metal trifluoromethanesulfonate is specifically: the molar ratio of alcohol amine (EA, DEA, AEE or HDA) to alkali metal trifluoromethanesulfonate (LiOTf, NaOTf or KOTf) is 1:1, reaction temperature 80-120°C, stirring time 48 hours; the molar ratio of alcoholamine to trifluoromethanesulfonic acid alkali metal salt is specifically: alcoholamine (EA, DEA, AEE or HDA) and trifluoromethanesulfonic acid The molar ratio of alkali metal salt (LiOTf, NaOTf or KOTf) is 2:1, the reaction temperature is 50-100°C, and the stirring time is 36 hours; alcohol amine (EA, DEA, AEE or HDA) and alkali metal triflate The mol...

experiment example 1-12

[0021] Experimental example 1-12: In glass vials with a diameter of about 1 cm and a volume of about 5 mL, respectively add the mixed solutions prepared in the above-mentioned manner, stir magnetically, control the adsorption temperature to 70°C, and then slowly introduce carbon dioxide gas to control The flow rate of carbon dioxide was 50mL / min, the adsorption pressure was 0.1MPa, and the carbon dioxide was weighed after adsorption to saturation. The results of capturing carbon dioxide are shown in Table 1.

[0022] Table 1 The effect of different kinds of solutions on capturing carbon dioxide

[0023]

[0024] In the present invention, mol / mol IL represents the amount of carbon dioxide absorbed per mole of the compounded solution.

experiment example 21-26

[0026] Similar to Experimental Example 1-20, the mixed solution of monoethanolamine and lithium trifluoromethanesulfonate (2:1 molar ratio) was used as the absorbent to absorb carbon dioxide, and the absorption temperature, absorption time and carbon dioxide pressure were changed. The absorption results are shown in Table 2.

[0027] Table 2 The results of capturing carbon dioxide by EA:LiOTf=2:1 mixed solution under different conditions

[0028] serial number Pressure (Mpa) Absorption temperature (°C) Absorption time (h) Carbon dioxide absorption (mol / mol IL) 21 0.1 50 1.0 0.97 22 0.1 60 0.7 0.90 23 0.1 80 0.4 0.70 24 0.1 100 0.2 0.40 25 0.01 70 0.5 0.83 26 0.05 70 0.5 0.85

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Abstract

The invention belongs to the technical field of gas separation by absorption, and discloses a hydramine and trifluoromethanesulfonic acid alkali metal salt combination solution and an application thereof. The hydramine and trifluoromethanesulfonic acid alkali metal salt combination solution is prepared by mixing hydramine and trifluoromethanesulfonic acid alkali metal salt, wherein the molar ratio of the hydramine to the trifluoromethanesulfonic acid alkali metal salt is (1-3):1. The combination solution disclosed by the invention has the advantages of simple preparation, good stability, high adsorption capacity and high absorbent temperature.

Description

technical field [0001] The invention belongs to the technical field of gas separation through adsorption, and in particular relates to a compound solution of alcohol amine and trifluoromethanesulfonic acid alkali metal salt and its application. Background technique [0002] With the rapid development of economy and society, the emission of carbon dioxide is increasing year by year, and the resulting greenhouse effect has seriously affected the ecological environment. Therefore, controlling carbon dioxide emission and capturing carbon dioxide has attracted extensive attention and has become a global hot issues of concern. The development of efficient, economical and environmentally friendly carbon dioxide separation and absorption technology has very important application value, which can provide a new idea for the industrial capture of carbon dioxide. [0003] Solvent (liquid) absorption method is currently the most widely used separation technology for capturing carbon dio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/14
Inventor 许映杰
Owner SHAOXING UNIVERSITY