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Preparation method of polypropylene amidoxime surface grafting modified zeolite and application thereof

A surface graft modification, polypropylene amidoxime technology, applied in the field of chemistry, can solve the problems of mineral characteristics change, affecting adsorption performance, etc., to achieve the effects of low cost, low adsorption requirements, and wide sources

Inactive Publication Date: 2019-06-28
HUNAN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The aggregation and coagulation of zeolite under different temperature and electrolysis adjustments can easily lead to changes in mineral properties, thereby affecting its adsorption performance and modifying it to overcome the above defects

Method used

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  • Preparation method of polypropylene amidoxime surface grafting modified zeolite and application thereof
  • Preparation method of polypropylene amidoxime surface grafting modified zeolite and application thereof
  • Preparation method of polypropylene amidoxime surface grafting modified zeolite and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] step 1:

[0028] The zeolite is sieved through a 100-mesh screen to remove coarse impurities, washed with deionized water, and then dried for later use.

[0029] Step 2:

[0030] The 1.0g zeolite that takes above-mentioned preliminary treatment is put into flask, then adds 10g deionized water; 0.3g cetyltrimethylammonium bromide (CTAB) is dissolved in 10ml deionized water, then while stirring The solution was added into a flask containing zeolite, and stirred and reacted in a constant temperature water bath at 60° C. for 2 hours to obtain a suspension containing zeolite.

[0031] Step 3:

[0032] Add 0.1g of initiator ammonium persulfate and 0.5ml of cross-linking agent N,N,N',N'-tetramethylethylenediamine to the suspension. After the initiator is fully dissolved, slowly drop 10ml of acrylonitrile monomer Add to the solution, pass N while adding dropwise 2 , after the dropwise addition, continue to feed N 2 After 2 minutes, the flask was placed in a constant temper...

Embodiment 2

[0041] A kind of polyacryl amidoxime surface grafting modified zeolite of a kind of embodiment 1 is removing the application of the lead-containing waste water of different pH, and concrete application method is:

[0042] Take 7 parts of pb with a concentration of 25mg / L 2+ Simulated waste water solution 100mL is placed in 250mL Erlenmeyer flask, the polyacrylamide oxime surface grafting modified zeolite that adds the zeolite S1 that step (1) obtains in embodiment 1, step (6) prepares in each Erlenmeyer flask S2 0.1g, with 0.1mol / L HCl and 0.1mol / L NaOH to adjust the pH to 2, 3, 4, 5, 6, 7, 8 respectively, put it in a constant temperature shaker at 25°C and 180r / min for 24h, static Set aside for 10min, filter with 0.45μm filter membrane, take the filtrate to measure residual Pb 2+ concentration. The measurement results are attached Figure 4 : Low pH is not conducive to the removal of lead in water samples. When the pH is between 6 and 7, the removal rate of lead reaches th...

Embodiment 3

[0044] The application of a kind of polyacrylamide oxime surface graft modified zeolite of a kind of embodiment 1 in the lead-containing waste water of different adsorption time, concrete application method is:

[0045] The polyacryl amidoxime surface graft modified zeolite 0.1g of embodiment 1 is added to a pH value of 6, pb 2+ In the lead-containing wastewater with a concentration of 25mg / L, set the temperature at 25°C and oscillate in a constant temperature oscillator in a water bath with an oscillation speed of 180r / min for 70min, and detect them at 20min, 30min, 40min, 50min, 60in, and 70min after the start of adsorption by constant temperature oscillation. The concentration of lead in lead-containing wastewater was calculated for the removal rate. Test results such as Figure 5 Shown: After 40 minutes of adsorption, the adsorption basically reached equilibrium.

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Abstract

The invention discloses a preparation method of polypropylene amidoxime surface grafting modified zeolite and application thereof. Zeolite, acrylonitrile monomers and the like are used for preparing the polypropylene amidoxime surface grafting modified zeolite. The operation process is simple, the adsorption requirement is low, and the adsorption material is wide in source, recyclable and low in cost.

Description

technical field [0001] The invention belongs to the field of chemistry, and in particular relates to a preparation method and application of a polyacrylamide oxime surface-grafted modified zeolite. Background technique [0002] Zeolite is a kind of inorganic material with three-dimensional pore structure. Due to its uniform pore size, strong acidity, selectivity and stability, zeolite is often used in ion exchange, separation, catalysis, adsorption, etc. The aggregation and coagulation of zeolite under different temperature and electrolysis adjustments can easily lead to changes in mineral properties, thereby affecting its adsorption performance and modifying it to overcome the above defects. Contents of the invention [0003] In order to overcome the above problems, the present invention discloses a preparation method and application of a polyacrylamide oxime surface graft modified zeolite. The present invention utilizes zeolite, acrylonitrile monomer, etc. to prepare a p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26C02F1/28B01J20/30C02F101/20
Inventor 周唯刘安民廖可兵陈雪林
Owner HUNAN INST OF TECH
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