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Compound with porphyrin structure as well as preparation method and application of compound

A compound and porphyrin technology, applied to the compound with porphyrin structure and the field of preparation and application thereof, can solve the problems of increased membrane surface resistance, increased energy consumption, etc., and achieve easy availability, low price, improved membrane stability and mechanical properties. performance effect

Active Publication Date: 2021-10-29
ZHEJIANG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the addition of modified materials often leads to an increase in membrane surface resistance and an increase in energy consumption during the separation process.

Method used

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  • Compound with porphyrin structure as well as preparation method and application of compound
  • Compound with porphyrin structure as well as preparation method and application of compound
  • Compound with porphyrin structure as well as preparation method and application of compound

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] Preparation of base film: Dissolve sulfonated PEEK with IEC=1.2mmol / g in NMP, stir magnetically at 80°C until it is completely dissolved and prepare a 25% solution to obtain a casting solution; defoam the casting solution, and then The casting solution after foaming was coated on a clean glass plate, and dried at 80°C to form a film to obtain a base film with a size of 8cm×8cm and a film thickness of 400μm.

[0045] Synthesis of compounds containing porphyrin structure: freshly distilled pyrrole (50mmol, 3.35g) and 4-hydroxybenzaldehyde (50mmol, 6.10g) were dissolved in 200mL propionic acid, and refluxed at 80°C for four hours. After cooling, it was poured into deionized water to precipitate, filtered, washed alternately with ethyl acetate and acetone three times, and dried in vacuum at 40°C to obtain the product.

[0046] Preparation of porphyrin-modified selective cation-exchange membrane: 4.55 g of the product in the previous step and 5.00 g of hydroquinone were diss...

Embodiment 2

[0048] Preparation of base film: Dissolve sulfonated PEEK with IEC=1.2mmol / g in NMP, stir magnetically at 80°C until completely dissolved and prepare a 25% solution to obtain a casting solution; defoam the casting solution, and then The casting solution after foaming was coated on a clean glass plate, and dried at 80°C to form a film to obtain a base film with a size of 8cm×8cm and a film thickness of 400μm.

[0049] Synthesis of compounds containing porphyrin structures: freshly distilled pyrrole (50 mmol, 3.35 g) and 4-aminobenzaldehyde (50 mmol, 6.06 g) were dissolved in 200 mL of propionic acid, and refluxed at 80 degrees Celsius for four hours. After cooling, it was poured into deionized water to precipitate, filtered, washed alternately with ethyl acetate and acetone three times, and then vacuum-dried at 40°C to obtain the product.

[0050] Preparation of porphyrin-modified selective cation exchange membrane: 5.30 g of the product in the previous step and 5.00 g of hydro...

Embodiment 3

[0052] Preparation of base film: Dissolve sulfonated PEEK with IEC=1.2mmol / g in NMP, stir magnetically at 80°C until it is completely dissolved and prepare a 25% solution to obtain a casting solution; defoam the casting solution, and then The casting solution after foaming was coated on a clean glass plate, and dried at 80°C to form a film to obtain a base film with a size of 8cm×8cm and a film thickness of 400μm.

[0053] Synthesis of compounds containing porphyrin structure: freshly distilled pyrrole (50mmol, 3.35g) and 4-hydroxybenzaldehyde (50mmol, 6.10g) were dissolved in 200mL propionic acid, and refluxed at 80°C for four hours. After cooling, it was poured into deionized water to precipitate, filtered, washed alternately with ethyl acetate and acetone three times, and dried in vacuum at 40°C to obtain the product.

[0054] Preparation of porphyrin-modified selective cation-exchange membrane: 4.52 g of the product in the previous step and 5.00 g of pyroglucinol were diss...

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Abstract

The invention discloses a compound with a porphyrin structure as shown in a formula (I), a preparation method of the compound and application of the compound in surface modification of a selective cation exchange membrane. Raw materials adopted by the invention are common chemical raw materials which are low in price and easy to obtain, and the prepared surface-modified selective cation exchange membrane has the advantages of excellent ionic conductivity, high chemical stability, high monovalent cation selectivity and the like, and particularly has wide application prospects in the field of electrodialysis application. The preparation process is simple and quick, and the selective effect of the membrane is good.

Description

technical field [0001] The invention relates to a compound with a porphyrin structure, a preparation method thereof, and an application in preparing selective cation exchange membranes through surface modification, and belongs to the membrane technology field. Background technique [0002] In human life and industrial production, membrane separation technology has been widely used. As a typical representative of membrane separation technology, electrodialysis technology is widely used in many fields such as material separation, purification, and energy storage. However, with the development of electrodialysis technology, some conventional ion exchange membranes can no longer meet the special needs of production, and some membranes with special functions have emerged as the times require. Among them, the monovalent selective cation exchange membrane has important applications in the removal of calcium and magnesium ions that are easy to scale in the desalination of brackish ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07D487/22B01D61/44B01J39/18B01J39/19
CPCC07D487/22B01J39/18B01J39/19B01D61/44
Inventor 姚宇洋沈江南陈权廖俊斌
Owner ZHEJIANG UNIV OF TECH
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