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Preparation method of supermolecular adsorbent and application thereof

An adsorbent and supramolecular technology, which is applied in chemical instruments and methods, adsorption water/sewage treatment, and other chemical processes, can solve the problems of poor adsorption effect and enhanced adsorption capacity of pyridone macrocyclic compounds, and achieve improved reuse Efficiency, avoiding the loss of adsorbent, and expanding the application range

Active Publication Date: 2017-08-29
洲际环境科学研究院(广州)有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the previous research process, the inventor found that the adsorption effect of pyridone macrocycle itself is poor; the inventor prepared a cellulose-based adsorbent based on pyridone macrocycle, but its adsorption capacity needs to be enhanced

Method used

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  • Preparation method of supermolecular adsorbent and application thereof
  • Preparation method of supermolecular adsorbent and application thereof
  • Preparation method of supermolecular adsorbent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Embodiment 1: Preparation of epichlorohydrin crosslinked pyridone macrocyclic compound supramolecular adsorbent

[0035] Prepare the pyridone macrocyclic supramolecular adsorbent as follows:

[0036] Add the pyridone macrocyclic compound, potassium carbonate and epichlorohydrin into the DMF solution, the molar ratio of the three is 1:2:4, the reaction time is 5 hours, and the reaction temperature is 60°C. As the reaction progresses, the viscosity of the system gradually increases. increase. After stopping the reaction, filter, and use the obtained solid to wash with water and ethanol respectively, and then vacuum-dry for future use.

[0037] figure 2 Infrared spectrum of a pyridone macrocycle adsorbent cross-linked with epichlorohydrin, such as figure 2 As shown, 3300cm -1 The sharper amine peaks on the left and right become broad peaks with stronger intensity after cross-linking with epichlorohydrin, indicating that hydroxyl groups are formed. It proved that the...

Embodiment 2

[0038] Example 2: Application of epichlorohydrin-crosslinked pyridone macrocyclic adsorbent in the adsorption of metal ions

[0039] Put 25 mg of the supramolecular adsorbent obtained in Example 1 into 150 mL of a metal ion solution of a certain concentration, and adsorb under stirring conditions, measure and calculate the adsorption capacity of the adsorbent after a certain period of time.

[0040] (1)Cu 2+ : The temperature is 25°C, the time is 10min, the pH is 4, the initial metal ion concentration is 96mg / L; the maximum adsorption capacity of the supramolecular adsorbent reaches 518.4mg / g; the adsorption efficiency is 90%.

[0041] (2)Cu 2+ : The temperature is 25° C., the time is 10 min, the pH is 4, the amount of the adsorbent is 2.5 mg, and the initial metal ion concentration is 4 mg / L; the adsorption efficiency of the supramolecular adsorbent is 86%. It can be seen that the adsorbent of the present invention also has higher adsorption efficiency for low-concentration...

Embodiment 3

[0047] Example 3: Application of Epichlorohydrin-crosslinked Pyridone Macrocyclic Adsorbent in Adsorbing Dye Molecules

[0048] Put 25mg of supramolecular adsorbent in 150mL of dye solution with a certain concentration, measure and calculate the adsorption capacity of the adsorbent after a certain period of time.

[0049] (1) Methylene blue: the temperature is 50°C, the time is 10min, the pH is 7.9, and the initial dye concentration is 155mg / L; the adsorption capacity of the epichlorohydrin crosslinked pyridone macrocyclic adsorbent is 920mg / g, and the adsorption rate 99%.

[0050] (2) Crystal violet: the temperature is 50°C, the time is 8min, the pH is 8.2, and the initial dye concentration is 58mg / L; the adsorption capacity of the epichlorohydrin-crosslinked pyridone macrocyclic adsorbent is 280mg / g, 85% respectively.

[0051] (3) Methyl orange: the temperature is 50° C., the time is 8 minutes, and the pH is 8.2; the adsorption capacity of the pyridone macrocyclic adsorben...

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Abstract

The invention discloses a preparation method of a supermolecular adsorbent and an application thereof and belongs to the field of light chemical. A porous adsorption material is prepared by crosslinking a pyridine macrocyclic compound in the presence of a crosslinking agent such as epoxy chloropropane and cyanuric chloride. The prepared adsorbent is low in cost, large in adsorption capacity and stable in adsorption, and the adsorption materials can be repeatedly used for many times, so that the preparation method has the advantages of excellent energy saving and emission reduction and environmental friendliness.

Description

technical field [0001] The invention relates to a preparation method and application of a supramolecular adsorbent, belonging to the field of light chemical industry. Background technique [0002] With the development of industry, the pollution of industrial wastewater and domestic wastewater is becoming more and more serious. It is particularly important to strengthen sewage treatment, especially the treatment of industrial wastewater. The dye-containing wastewater discharged from printing and dyeing factories, the extensive use of pesticides in agricultural production, and heavy metal pollution from mining and exhaust emissions not only endanger the safety of the ecological environment but also directly threaten human health. [0003] The adsorption method has the advantages of high adsorption capacity, reusable adsorbent and adsorbate, and good water quality after treatment without secondary pollution. Therefore, adsorption method has become one of the main methods for in...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/28B01J20/30C02F1/28C02F101/20C02F101/30C02F103/30
Inventor 孙昌倪佳东赵春燕王树根杜金梅许长海
Owner 洲际环境科学研究院(广州)有限公司
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