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Hyperbranched polyamine carbon dioxide absorbent as well as preparation method and application thereof

A carbon dioxide and absorbent technology, applied in chemical instruments and methods, separation methods, reagents, etc., can solve the problems of insufficient carbon dioxide absorption capacity, low absorbent viscosity, slow absorption speed, etc., and achieve simple structure, high nitrogen content, Fast absorption effect

Active Publication Date: 2021-11-26
济南雅歌新材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although many absorbents with acceptable effects have been developed one after another, there are still problems that need to be solved urgently, such as low nitrogen content, insufficient carbon dioxide absorption capacity, slow absorption speed, and low viscosity of absorbents.

Method used

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  • Hyperbranched polyamine carbon dioxide absorbent as well as preparation method and application thereof
  • Hyperbranched polyamine carbon dioxide absorbent as well as preparation method and application thereof
  • Hyperbranched polyamine carbon dioxide absorbent as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0063] has the general formula -A-C- repeating unit, and Preparation of compound P4-1 with n=2;

[0064] The structural formula of P4-1 is:

[0065]

[0066] 1) Pentaerythritol (13.6 g, 0.1 mol) was dissolved in dry N,N-dimethylformamide (200 mL), and phosphorus tribromide (133 g, 0.5 mol) was added in batches at 25°C. After stirring for 20 minutes, it was slowly raised to 125°C for 12 hours of reaction. After the reaction, the reaction solution was poured into ice water (500mL), and sodium hydroxide solution (0.2mol L -1 ) to adjust the pH to 8, and the residue was suction-filtered to obtain tetrabromopentaerythyl alcohol (24.6 g, 64%). 1 H NMR (CDCl 3 ,400MHz):δ3.20(s,8H). 13 C NMR (CDCl 3 ,100MHz):δ146.1,37.9.HR-MS(MALDI):m / z[M] + cacld for C5H8Br4, 383.7860; found, 387.7319.

[0067] 2) Tetrabromopentaerythyl alcohol (19.2g, 0.05mol) and 4-hydroxybenzaldehyde (26.8g, 0.220mol) prepared in step 1), and potassium carbonate (41.4g, 0.30mol) were added to N,N- In ...

Embodiment 2

[0070] has the general formula -A-C- repeating unit, and Preparation of compound P4-2 with n=3;

[0071] The structural formula of P4-2 is:

[0072]

[0073] 1) Tetrabromopentaerythyl alcohol (19.2g, 0.05mol) and 3-hydroxybenzaldehyde (26.8g, 0.220mol), potassium carbonate (41.4g, 0.30mol) are added to N,N-dimethylformamide ( 250 mL), the temperature was raised to 100°C for 16 hours. The reaction solution was poured into ice water (500 mL), and the residue was suction-filtered to obtain intermediate product A-2 (20.9 g, 76%). 1 H NMR (CDCl 3 ,400MHz):δ3.823(s,8H),7.22(d,J=8.0Hz,4H),7.35(s,4H),7.56(d,J=8.0Hz,4H),7.65-7.72(m, 4H), 9.82(s, 4H). 13 C NMR (CDCl 3 ,100MHz):δ191.08,165.63,137.52,129.86,121.54,12.78,115.97,61.23,40.56.HR-MS(MALDI):m / z[M] + cacld for C33H28O8, 552.1784; found, 553.1786.

[0074] 2) The intermediate product A-2 (27.6g, 0.05mol) and C-2 (n=3) tetraethylenepentamine (19.4g, 0.10mol) prepared in step 1) were added to methanol (100mL), and At 0...

Embodiment 3

[0076] has the general formula -B-C- repeating unit, and The preparation of the compound P6-1 of n=2 The structural formula of P6-1 is:

[0077]

[0078] 1) Glycerol (9.2 g, 0.1 mol) was dissolved in dry N,N-dimethylformamide (200 mL), and phosphorus tribromide (106.4 g, 0.4 mol) was added in batches at 25°C. After stirring for 20 minutes, it was slowly raised to 120°C for 12 hours of reaction. After the reaction, the reaction solution was poured into ice water (500mL), and sodium hydroxide solution (0.2mol L -1 ) to adjust the pH to 8, and the residue was suction filtered to obtain tribromoglycerol (17.6 g, 63%). 1 H NMR (CDCl 3 ,400MHz): δ4.60-4.65(m,1H),3.74(d,J=8.0Hz 4H). 13 CNMR (CDCl 3 ,100MHz):δ48.9,34.7.HR-MS(MALDI):m / z[M] + cacld for C3H5Br3, 277.7941; found, 279.7921.

[0079] 2) Tribromoglycerol (13.9g, 0.05mol) and 4-hydroxybenzaldehyde (19.9g, 0.16mol) prepared in step 1), and potassium carbonate (27.6g, 0.20mol) were added to N,N- In dimethylformamide...

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Abstract

The invention discloses a hyperbranched polyamine carbon dioxide absorbent, which has a -A-C- or -B-C- repetitive structure unit, and the structural formulas of A, B and C are shown in the specification. The preparation method comprises the following steps of: enabling pentaerythritol or glycerol to react with phosphorus tribromide to obtain tetrabromo pentaerythritol or tribromo glycerol; enabling tetrabromo-pentaerythritol or tribromo-glycerol to react with a compound with a general formula P1 under the action of alkali to obtain a compound with a structural formula A or B; under the effect of a reducing agent, enabling the compound with the structural formula A or B to react with the compound with the structural formula C to obtain the hyperbranched polyamine carbon dioxide absorbent. The hyperbranched polyamine carbon dioxide absorbent prepared by the preparation method disclosed by the invention is high in nitrogen content (nitrogen density), high in carbon dioxide absorption capacity and high in absorption speed; the carbon-rich fluid is obtained after carbon dioxide is absorbed, can be used for improving the oil recovery ratio and reducing the operation cost of CCS, and has great theoretical and practical significance in carbon neutralization and carbon emission reduction.

Description

technical field [0001] The invention relates to the technical field of carbon dioxide absorption, in particular to a hyperbranched polyamine carbon dioxide absorbent and its preparation method and application. Background technique [0002] Climate change caused by the greenhouse effect in recent decades has seriously affected the development of the environment, society and economy. Among them, carbon dioxide contributes a considerable proportion to the greenhouse effect. As one of the main components of greenhouse gases, its separation and capture has become a global research hotspot. [0003] There are many problems in the existing separation and capture technology of carbon dioxide, such as: large equipment size, high regeneration energy consumption, potential environmental pollution and so on. The key to solving the above problems lies in the research and development of new absorbents. The absorbents currently used in the carbon capture process mainly include physical a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G83/00C09K8/594B01D53/14
CPCC08G83/005C09K8/594B01D53/1493B01D2257/504B01D2252/204Y02C20/40Y02P20/151
Inventor 柳沛丰刘磊周晓寒
Owner 济南雅歌新材料科技有限公司
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