A kind of cross-linked polystyrene adsorbent and its preparation method and application

A cross-linked polystyrene and adsorbent technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of poor dephenolization effect and low chlorine content, and achieve excellent adsorption performance, The operating conditions are mild and the effect of improving the dephenolization effect of sewage

Active Publication Date: 2022-05-10
WUHAN INSTITUTE OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In view of this, the present invention aims to propose a cross-linked polystyrene adsorbent to solve the problem that the existing sewage dephenolization adsorbent has low chlorine content, resulting in poor dephenolization effect.

Method used

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  • A kind of cross-linked polystyrene adsorbent and its preparation method and application
  • A kind of cross-linked polystyrene adsorbent and its preparation method and application
  • A kind of cross-linked polystyrene adsorbent and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0032] A cross-linked polystyrene adsorbent, specifically prepared through the following steps:

[0033] 1) Mix 5g waste foam, 200g carbon tetrachloride, and 10g anhydrous aluminum trichloride to obtain mixture A. At this time, the mol ratio of waste foam, carbon tetrachloride, and anhydrous aluminum trichloride is;

[0034] 2) Heating the mixture A at 70° C. for 12 h, and after the reaction is complete, terminate the reaction with absolute ethanol, and filter to obtain a crude product of cross-linked polystyrene;

[0035] 3) Alternately wash the cross-linked polystyrene crude product with ethanol and ethyl acetate for 6 times, that is, the cross-linked polystyrene crude product is washed with ethanol, and then washed with ethyl acetate, and reciprocated for 3 cycles, wherein, each wash The washing time is 1h, and the washing temperature is 60°C, that is, the time of each washing with ethanol and each time of washing with ethyl acetate is 1h, and the washing temperature is 60°...

Embodiment 2

[0039] The application of the cross-linked polystyrene adsorbent of embodiment 1 in sewage dephenolization, it may further comprise the steps:

[0040] Mix the cross-linked polystyrene adsorbent with a mass ratio of 0.001 and the phenol-containing sewage, and stir until the adsorption equilibrium is reached to obtain the dephenolized aqueous phase. Among them, the phenolic substance in the phenol-containing sewage is phenol (Phenol), which reaches the adsorption equilibrium The adsorption temperature is 30°C and the adsorption time is 120min.

[0041] In this example, in order to facilitate the detection of the dephenolization efficiency of the cross-linked polystyrene adsorbent in Example 1, the phenol-containing sewage in this example is simulated sewage containing phenol, wherein the initial concentration of phenol in the phenol-containing sewage is 1000 μg / g (ppm).

[0042] It can be seen from the test that the cross-linked polystyrene adsorbent in Example 1 is used to de...

Embodiment 3

[0044] The difference between this example and Example 2 is that the phenolic substance in the phenolic sewage is p-nitrophenol (4-NP).

[0045] It can be seen from the test that the cross-linked polystyrene adsorbent in Example 1 is used to dephenolize the sewage. After the adsorption operation, the p-nitrophenol content in the sewage is 738.15 μg / g, the dephenolization rate is 26.18%, and the adsorption capacity is 254.2 mg / g.

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Abstract

The invention provides a cross-linked polystyrene adsorbent and its preparation method and application. In parts by weight, the cross-linked polystyrene adsorbent consists of 1-10 parts of waste foam, 200-320 parts of carbon tetrachloride, 10 Parts of anhydrous aluminum trichloride prepared by Friedel‑Crafts alkylation reaction. The cross-linked polystyrene adsorbent of the present invention takes waste foam and carbon tetrachloride as raw materials, and it carries out Friedel-Crafts alkylation reaction under the catalysis of anhydrous aluminum trichloride, and carbon tetrachloride and waste foam The polystyrene linear molecules are cross-linked to form a three-dimensional network structure, which makes the cross-linked polystyrene adsorbent have a high chlorine content and a strong Lewis alkalinity, which can produce strong chemical reactions with phenolic pollutants with Bronsted acidity in water. role, and thus make it have a higher efficiency of sewage dephenolization, and its dephenolization rate can reach more than 90%.

Description

technical field [0001] The invention relates to the technical field of environmental chemical industry, in particular to a cross-linked polystyrene adsorbent and its preparation method and application. Background technique [0002] Coal chemical industry, dyestuff and other industries will produce a large amount of phenolic wastewater, which will be discharged without treatment, which will cause serious environmental and ecological problems. For example, the reproduction of organisms in the water body will be affected, and the phenolic substances in the water exceed 10mg / m 3 It will cause a large number of fish to die. Therefore, the U.S. Environmental Protection Agency recommends that the content of phenol in water should be less than 1mg / m 3 . If the human body ingests water containing phenolic substances, it will denature the proteins in the body and cause paralysis of the central system. [0003] At present, the methods for treating phenolic substances in water mainl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28C02F101/34
Inventor 姜兴茂张可琢周雅倩王倩陈丹高家俊
Owner WUHAN INSTITUTE OF TECHNOLOGY
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