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A kind of phenanthroimidazolyl triazine polymer and its preparation method and use

A technology of phenanthroimidazolyl triazine and polymer, which is applied in the field of gas adsorbents, can solve the problems of poor heat resistance, limited application space, hindered diffusion of carbon dioxide, etc., and achieve the effect of large specific surface area

Active Publication Date: 2021-04-30
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] After a lot of research, there are still some problems in the research field of carbon dioxide adsorption by solid adsorbents: At present, the use of polyamine-based amination reagents and increasing the specific surface area of ​​the carrier can properly improve the adsorption capacity of carbon dioxide, but the effect of improvement is still not enough. Further improvement is needed; secondly, in the process of carbon dioxide adsorption by solid adsorbents, the diffusion of carbon dioxide in the carrier pores is generally hindered, which reduces the adsorption capacity of adsorbents for carbon dioxide; moreover, the existing solid adsorbents generally have heat resistance Poor, not enough to meet the use requirements under specific conditions (such as high temperature flue gas), which limits its application space

Method used

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  • A kind of phenanthroimidazolyl triazine polymer and its preparation method and use
  • A kind of phenanthroimidazolyl triazine polymer and its preparation method and use
  • A kind of phenanthroimidazolyl triazine polymer and its preparation method and use

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Embodiment 1

[0076] A method for preparing a phenanthroimidazolyl triazine polymer, the method comprising the following steps:

[0077] (1) Preparation of 2-(4-cyanophenyl)-6,9-dicyano-1H-phenanthrene[9,10-d]:

[0078] a. Preparation of 3,6-dibromo-9,10-phenanthrenequinone:

[0079] Add 10.2ml of liquid bromine dropwise to 20.4g of 9,10-phenanthrenequinone and nitrobenzene solution of dibenzoyl peroxide. After the dropwise addition, heat the mixture to 110°C for 16h, wash the crude product with n-hexane, and filter That is, the brown product 3,6-dibromo-9,10-phenanthrenequinone was obtained;

[0080] b. Preparation of 3,6-dibromo-9,10-dimethoxyphenanthrene:

[0081] Dissolve 11.12g of 3,6-dibromo-9,10-phenanthrenequinone, 2.85g of tetrabutylammonium bromide in 100mlTHF and 100mlH 2 O Shake and mix in a separatory funnel for 5 minutes, then add 15ml of dimethyl sulfate, then add 30ml of 14.1 M sodium hydroxide aqueous solution, shake the mixture for 3 minutes, add 100g of ice to cool, ad...

Embodiment 2

[0092] Example 1 was repeated except that 2.85 g of tetrabutylammonium bromide was replaced by 16.018 g of sodium dithionite.

Embodiment 3

[0094] Repeat embodiment 1, just also add sodium dithionate in step a, 2.85g tetrabutylammonium bromide is replaced with 2.85g tetrabutylammonium bromide and 16.018g sodium dithionite.

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Abstract

The invention discloses a phenanthroimidazolyl triazine polymer and a preparation method thereof. 9,10-phenanthrenequinone is brominated, protected by carbonyl group, replaced with cyanate, and then oxidized to 3,6-dicyano-9,10-phenanthrenequinone, and then p-cyanobenzaldehyde imidazole is ring-formed to obtain 2 ‑(4‑cyanophenyl)‑6,9‑dicyano‑1H‑phenanthrene[9,10‑d]imidazole (CDPI), and finally use this as a building block through ZnCl 2 The ionothermal polymerization reaction obtains the phenanthroimidazolyl triazine polymer. The phenanthroimidazole-based triazine polymer provided by the present invention has the advantages of high specific surface area, rich pore structure and good thermal stability, and is simple to prepare, low in cost, and has excellent CO under 273K conditions. 2 Adsorption properties.

Description

technical field [0001] The invention relates to a triazine polymer, in particular to a phenanthroimidazolyl triazine polymer used for gas adsorption and a preparation method thereof, belonging to the field of gas adsorbents. Background technique [0002] As we all know, the massive emission of carbon dioxide is an important cause of the earth's greenhouse effect, so carbon dioxide is also called a greenhouse gas. Given the increasing demand for fossil fuels, it is not practical to limit CO2 emissions. However, we can absorb carbon dioxide during the emission process and further use the absorbed carbon dioxide for industrial raw material production, such as reducing carbon dioxide to methanol. [0003] Carbon dioxide capture technologies mainly include liquid amine absorption, membrane separation and adsorption methods. At present, liquid amine solution is mainly used to absorb carbon dioxide. This method has high adsorption capacity, good selectivity, and high efficiency, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G73/06B01J20/26B01D53/02B01J20/30
CPCB01D53/02B01D2257/504B01J20/262C08G73/0644C08G73/065C08G73/0677Y02P20/151Y02C20/40
Inventor 黎华明文继开杨端光陈红飙
Owner XIANGTAN UNIV