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A kind of preparation method of highly stable strong basic porous ion exchange material

An ion exchange material and an ion exchange technology, which are applied in the field of preparation of highly stable and strong alkaline porous ion exchange materials, can solve the problems of lack of permanent pores, complicated process, low yield, etc., and achieve obvious economic advantages and industrial application potential, The effect of high chemical stability and simple reaction operation

Active Publication Date: 2022-05-10
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method does not fundamentally improve the thermal stability of the material
The preparation of these high-temperature resistant strong basic anion exchange resins still has the disadvantages of long synthetic route, complex process, harsh operating conditions, monomer separation and low yield, difficult purification, high production cost, etc., and it is difficult to popularize and apply.
At the same time, due to the entanglement between the polymer chains of traditional ion exchange resins, ion sites will be trapped, which will affect its ion exchange capacity; and its lack of permanent pores will lead to a slower adsorption rate.

Method used

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  • A kind of preparation method of highly stable strong basic porous ion exchange material
  • A kind of preparation method of highly stable strong basic porous ion exchange material
  • A kind of preparation method of highly stable strong basic porous ion exchange material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] First, 14.8 mg (0.1 mmol) of triaminoguanidine hydrochloride and 29.1 mg (0.15 mmol) of 2,5-dimethoxy-1,4-benzenedicarboxaldehyde were added to a 10 mL ampoule; Add 0.2 mL of trimethylbenzene, 0.2 mL of water, 0.3 mL of ethanol and 0.2 mL of glacial acetic acid; sonicate the mixed solution for 10 min; perform freeze-vacuum-thaw operation under argon atmosphere and liquid nitrogen, and after three cycles, under vacuum conditions The ampoules were sealed; the sealed ampoules were placed in a 120°C oven for 3 days. The mixture was vacuum filtered to give a red solid, which was washed multiple times with dimethylformamide, water, methanol. Then the solid powder is extracted by Soxhlet, and the obtained product is vacuum-dried at 120° C. for 12 hours, then ion-exchanged with KOH or other alkaline solution for 4 days, and washed to obtain the product of the present invention.

[0039] figure 1 Shown is the comparison of the infrared spectra of the highly stable strong alkal...

Embodiment 2

[0045] Change the reaction solvent in above-mentioned embodiment 1, in embodiment 2, the reaction solvent is 1,4-dioxane, other

[0046] The same material as described in Example 1 was obtained, and the properties of the product obtained in Example 1 were basically the same.

[0047]To sum up, the present invention uses triaminoguanidine salt and 2,5-dimethoxy-1,4-benzenedicarboxaldehyde as reaction monomers to synthesize highly stable and strongly basic porous ion exchange materials under acid catalysis. Thermogravimetric analysis shows that the material of the present invention has good thermal stability. Through the nitrogen adsorption and desorption curves, the BET specific surface area of ​​the material of the present invention is obtained to reach 645.8m 2 / g. The product that was soaked and stirred for one week in acid and alkali was tested by powder diffractometer, and it was found that the material of the present invention had extremely high acid and alkali stabilit...

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Abstract

The invention discloses a highly stable strong basic porous ion exchange material and a preparation method thereof, belonging to the technical field of polymer ion exchange materials. The invention uses triaminoguanidine salt and 2,5-dimethoxyl-1,4-phthalaldehyde as reaction monomers to synthesize highly stable and strongly basic porous ion exchange materials in a reaction vessel in one step. The preparation method is simple, and the reaction monomer is cheap and easy to obtain. Infrared spectroscopy demonstrated that polymerization had occurred with high efficiency. Thermogravimetric analysis shows that the material of the invention has high thermal stability. By testing the nitrogen adsorption and desorption curves of the material of the present invention, it is calculated that its BET specific surface area reaches 645.8m 2 g ‑1 . The XRD spectrum and nitrogen adsorption-desorption curve after strong acid and strong alkali treatment prove that it has high chemical stability and can be used as a good matrix material in harsh environments. The highly stable and strongly basic porous ion exchange material of the invention is expected to be industrially popularized and applied in the fields of catalytic synthesis, water treatment, pollutant adsorption and the like.

Description

technical field [0001] The invention belongs to the technical field of polymer ion exchange materials, and in particular relates to a preparation method of a highly stable strong alkaline porous ion exchange material. Background technique [0002] Ion exchange materials are used in water treatment, power industry, separation and purification of biological and chemical agents, and catalytic synthesis. Among them, the application of anion exchange resin is particularly extensive. [0003] Anion exchange resin particles are composed of a cross-linked skeleton with a three-dimensional network structure, and are connected with many functional groups that are relatively flexible and cannot move freely. This functional group can dissociate ions, and can exchange with other ions of the same charge around it when it is used or regenerated. It is widely used in industrial production due to its large processing capacity, wide application range, long working life and low operating cos...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G12/14C08J9/00B01J41/13C08L61/22
CPCC08G12/14C08J9/00B01J41/13C08J2361/22
Inventor 李柏延张志远
Owner NANKAI UNIV