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A kind of sheet-like hexachlorocyclotriphosphazene-p-phenylenediamine condensation polymer adsorption material and its preparation method and application

A technology of hexachlorocyclotriphosphazene and p-phenylenediamine, which is applied in the direction of separation methods, selective adsorption, chemical instruments and methods, etc., and can solve problems such as complex preparation processes of iodine adsorption materials

Active Publication Date: 2021-05-04
WIDE WATER TREATMENT TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] In summary, the preparation process of the existing iodine adsorption materials is complicated, and the properties such as adsorption capacity and adsorption efficiency need to be further improved.

Method used

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  • A kind of sheet-like hexachlorocyclotriphosphazene-p-phenylenediamine condensation polymer adsorption material and its preparation method and application
  • A kind of sheet-like hexachlorocyclotriphosphazene-p-phenylenediamine condensation polymer adsorption material and its preparation method and application
  • A kind of sheet-like hexachlorocyclotriphosphazene-p-phenylenediamine condensation polymer adsorption material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1～11

[0047] The sheet-like polycondensate of hexachlorocyclotriphosphazene-p-phenylenediamine was prepared, and its adsorption effect on iodine was investigated.

[0048] (1) Preparation of flaky hexachlorocyclotriphosphazene-p-phenylenediamine polycondensate

[0049] Under nitrogen protection, 30 mmol p-phenylenediamine was added to a 500 mL four-necked bottle filled with 100 mL organic solvents (such as chlorobenzene, toluene, DMF, etc.), mechanically stirred, and the temperature of the reaction system was raised to 40°C.

[0050] Weigh 60 mmol of alkali metal hydroxide (NaOH is granular, KOH is flake), add it into a four-necked flask, and heat the reaction system until the temperature is 90-130°C. Then, dissolve 10mmol hexachlorocyclotriphosphazene (hexachlorocyclotriphosphazene:p-phenylenediamine:alkali metal hydroxide molar ratio is 1:3~3.5:6~7) in 25mL of inert solvent and drop slowly Add it to a four-necked bottle. After the dropwise addition, maintain the temperature of th...

Embodiment 12～14

[0056] Using the flaky hexachlorocyclotriphosphazene-p-phenylenediamine polycondensate obtained in Example 1, a cycle stability test was carried out to investigate the adsorption capacity (α, wt%) of the adsorbent to gaseous iodine. The results are shown in Table 2.

[0057] Table 2

[0058]

[0059] It can be known from Table 2 that the adsorption material has excellent adsorption stability.

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Abstract

The invention belongs to the field of environmental adsorption materials, and specifically discloses a sheet-shaped hexachlorocyclotriphosphazene-p-phenylenediamine polycondensate adsorption material and a preparation method and application thereof. In the invention, hexachlorocyclotriphosphazene and p-phenylenediamine are used as raw materials, and the Friedel-Crafts alkylation polycondensation reaction is carried out under the action of alkali metal hydroxide, and a sheet-shaped hexafluorocarbon is directly prepared by a one-step method without a conventional template agent. Chlorocyclotriphosphazene-p-phenylenediamine polycondensate. The sheet-shaped adsorbent of the present invention has excellent iodine adsorption performance, for example, the equilibrium adsorption capacity of gaseous iodine is as high as 271 wt%, and the adsorption capacity of gaseous iodine reaches 138 wt% when the adsorption time is 20 min.

Description

technical field [0001] The invention belongs to the field of environmental adsorption materials, and in particular relates to an iodine adsorption material. [0002] technical background [0003] The development and utilization of clean energy nuclear energy has effectively alleviated the problem of energy shortage and brought huge economic benefits to social development. However, the use of nuclear energy produces a large amount of radioactive substances with complex components, which poses unprecedented threats to environmental protection and human health. Radioactive iodine accounts for a large proportion of nuclear waste and is easily diffused in the atmosphere. It is a nuclide with important radiobiological significance. Excessive iodine entering the body can lead to impaired thyroid function and cause thyroid cancer. Therefore, finding a safe and effective method for capturing iodine has aroused widespread concern from scholars all over the world. [0004] At present...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30B01D53/02B01D15/08
CPCB01D15/08B01D53/02B01D2253/202B01D2257/202B01J20/262B01J20/28033B01J20/3085
Inventor 胡慧萍王欢彭奇凡彭全凡
Owner WIDE WATER TREATMENT TECH CO LTD
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