Amino functionalized hydrophobic zeolite, preparation method and applications thereof

An amino-functionalized, hydrophobic technology, applied in chemical instruments and methods, water pollutants, other chemical processes, etc., can solve the problem of low adsorption and achieve the effect of strong hydrophobicity

Inactive Publication Date: 2017-03-29
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] In order to solve the problem of low adsorption of heavy metal anions and hydrophobic pollutants in the zeolite adsorbent, the purpose of the present invention is to provide a kind of amino-functionalized hydrophobic zeolite and its preparation method and application. The zeolite prepared by this method also contains Amino functional groups and hydrophobic hydrocarbon chains, so that the modified zeolite can effectively adsorb heavy metal anions and hydrophobic pollutants

Method used

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  • Amino functionalized hydrophobic zeolite, preparation method and applications thereof
  • Amino functionalized hydrophobic zeolite, preparation method and applications thereof
  • Amino functionalized hydrophobic zeolite, preparation method and applications thereof

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preparation example Construction

[0033] The amino functionalized hydrophobic zeolite prepared by the preparation method of the present invention has a pH of 2, an adsorbent dosage of 4.0g / L, Cr 2 o 7 2- Under the condition of ion concentration of 50mg / L and adsorption time of 1h, the Cr 2 o 7 2- The removal rate of ions can reach 84.2-96.4%. The adsorption capacity of water vapor is 22.8-31.0 mg / g under the condition of relative humidity of 75%.

[0034] Under the conditions of pH 5, adsorbent dosage 4.0g / L, phenol concentration 50mg / L, and adsorption time 1h, the removal rate of phenol can reach 75.9-89.1%.

Embodiment 1

[0037] The preparation method of the amino-functionalized hydrophobic zeolite of the present embodiment is carried out according to the following steps:

[0038] First add 5g of natural clinoptilolite into 100mL of 3-aminopropyltrimethoxysilane solution with cyclohexane as the solvent concentration of 15g / L and react at 25°C for 24h, then filter with suction, wash with absolute ethanol, Drying makes amino-functionalized hydrophobic zeolite (the XRD pattern of samples is as follows figure 1 As shown, the TG / TDG curve is as image 3 shown).

[0039] Configuration 50mg / LCr 2 o 7 2- ions, adjust the pH of the solution to 2, add 0.2g amino-functionalized hydrophobic zeolite sample to 50mLCr 2 o 7 2- The ionic solution was stirred for 1 h with a magnetic stirrer. The supernatant of the treated solution was taken, centrifuged, and then filtered through 0.45 μm filter paper. Evaluation of Cr by UV-Vis Spectrophotometer 2 o 7 2- The removal effect of , the calculation formu...

Embodiment 2～19

[0042] Embodiment 2~19, method is with embodiment 1, the condition of each embodiment, Cr 2 o 7 2- The ion removal rate, water vapor adsorption capacity and phenol removal rate are shown in Table 1.

[0043] Table 1

[0044]

[0045]

[0046] In conjunction with the above examples, it can be drawn that after the natural clinoptilolite is modified by using an aminosilane coupling agent, its effect on Cr 2 o 7 2- The removal rate of ions is significantly improved, the adsorption capacity of water vapor is significantly reduced, and the removal rate of phenol is significantly increased. Cr 2 o 7 2- The removal rates of ions and phenol were increased; while the water vapor adsorption of the modified sample decreased with the increase of aminosilane coupling agent concentration, then increased slightly, and then tended to be flat, which was mainly due to the aminosilane coupling agent concentration increased. It is caused by the combined action of the hydrophilic ami...

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Abstract

The present invention relates to amino functionalized hydrophobic zeolite synthesis, particularly to an amino functionalized hydrophobic zeolite, a preparation method and applications thereof. The method comprises: adding natural clinoptilolite to an aminosilane coupling agent solution, carrying out a complete reaction, carrying out suction filtration, rinsing, and drying to obtain the amino functionalized hydrophobic zeolite. According to the present invention, the cheap natural clinoptilolite is subjected to surface modification with the aminosilane coupling agent, such that the zeolite surface simultaneously contains the amino functional group and the hydrophobic hydrocarbon chain; and the amino functionalized hydrophobic zeolite prepared through the method can effectively adsorb heavy metal anions and hydrophobic contaminants.

Description

[0001] 【Technical field】 [0002] The invention relates to the synthesis of amino-functionalized hydrophobic zeolite, in particular to an amino-functionalized hydrophobic zeolite and its preparation method and application. [0003] 【Background technique】 [0004] At present, the use of natural porous minerals represented by natural zeolite and its modified products in sewage treatment has attracted more and more attention. Natural zeolite has become one of the few mineral materials put into engineering use, and its removal of ammonia nitrogen in water is considered to be one of the most effective methods in environmental engineering. As a porous hydrous aluminosilicate mineral with a framework structure, the crystal structure of zeolite can be divided into: ① aluminosilicate framework; ② the framework contains pores and cavities that can exchange cations M; That is, zeolite water. The water molecules and metal cations in the pores of the zeolite crystal have great mobility, w...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/22B01J20/30C02F1/28C02F101/20C02F101/22C02F101/34C02F101/32
CPCB01J20/223C02F1/288C02F2101/20C02F2101/22C02F2101/327C02F2101/345
Inventor 王程马定莹杨超赵佳新郭丽娜暴旭艳赵婷刘楠赵楼黄剑锋曹丽云
Owner SHAANXI UNIV OF SCI & TECH
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