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Modified nanosilicon dioxide material and preparation method and application of modified nanosilicon dioxide material

A nano-silica, modified technology, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., can solve the problems of poor selectivity, high price, low mechanical strength, etc., and achieve low cost , the method is simple, the performance is stable

Active Publication Date: 2018-12-28
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, traditional ion-exchanged silica usually has poor selectivity, low mechanical strength and high price

Method used

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  • Modified nanosilicon dioxide material and preparation method and application of modified nanosilicon dioxide material
  • Modified nanosilicon dioxide material and preparation method and application of modified nanosilicon dioxide material
  • Modified nanosilicon dioxide material and preparation method and application of modified nanosilicon dioxide material

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The modified nano silicon dioxide material described in this embodiment has a structural formula of:

[0023]

[0024] The preparation method of this modified nano silicon dioxide material, its specific steps are as follows:

[0025] (1) Add nano-silica, ammonia water, N-aminoethyl-Y-aminopropyltrimethoxysilane to the ethanol solution, reflux at 70°C for 14 hours, and then separate the liquid from the solid, and take out the solid matter with ethanol After washing and centrifugal separation, vacuum drying, the obtained product is marked as NTED-SNP; wherein, the liquid-solid ratio of ethanol solution to nano-silica is 16:1ml / g, N-aminoethyl-Y-aminopropyltrimethoxy The mass ratio of base silicon to nano silicon dioxide is 2:1 ml / g, and the liquid-solid ratio of ammonia water to nano silicon dioxide is 0.2:1 ml / g.

[0026] (2) Add the obtained NTED-SNP and pyromellitic anhydride to N,N-dimethylformamide respectively, reflux at 80°C for 12 hours, and then separate the ...

Embodiment 2

[0030] The modified nano silicon dioxide material described in this embodiment has a structural formula of:

[0031]

[0032] The preparation method of this modified nano silicon dioxide material, its specific steps are as follows:

[0033] (1) Add nano-silica, ammonia water, N-aminoethyl-Y-aminopropyltrimethoxysilane to the ethanol solution, reflux at 70°C for 14 hours, and then separate the liquid from the solid, and take out the solid matter with ethanol After washing and centrifugal separation, vacuum drying, the obtained product is marked as NTED-SNP; wherein, the liquid-solid ratio of ethanol solution to nano-silica is 18:1ml / g, N-aminoethyl-Y-aminopropyltrimethoxy The mass ratio of base silicon to nano silicon dioxide is 2.3:1 ml / g, and the liquid-solid ratio of ammonia water to nano silicon dioxide is 0.25:1 ml / g.

[0034] (2) Add the obtained NTED-SNP and pyromellitic anhydride to N,N-dimethylformamide respectively, reflux at 80°C for 12 hours, and then separate t...

Embodiment 3

[0038] The modified nano silicon dioxide material described in this embodiment has a structural formula of:

[0039]

[0040] The preparation method of this modified nano silicon dioxide material, its specific steps are as follows:

[0041] (1) Add nano-silica, ammonia water, N-aminoethyl-Y-aminopropyltrimethoxysilane to the ethanol solution, reflux at 60°C for 12 hours, and then separate the liquid from the solid, and take out the solid matter with ethanol After washing and centrifugal separation, vacuum drying, the obtained product is marked as NTED-SNP; wherein, the liquid-solid ratio of ethanol solution to nano-silica is 20:1ml / g, N-aminoethyl-Y-aminopropyltrimethoxy The mass ratio of base silicon to nano silicon dioxide is 2.5:1 ml / g, and the liquid-solid ratio of ammonia water to nano silicon dioxide is 0.3:1 ml / g.

[0042] (2) Add the obtained NTED-SNP and pyromellitic anhydride into N,N-dimethylformamide respectively, reflux at 70°C for 10 hours, and then separate ...

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Abstract

The invention discloses a modified nanosilicon dioxide material and a preparation method and application of the modified nanosilicon dioxide material, and belongs to the technical field of preparationof materials. The method prepares the modified nanosilicon dioxide PDMA-SNP by respectively adding nanosilicon dioxide, ammonium hydroxide and N-aminoethyl-Y-aminopropyl trimethoxy silane into an ethanol solution, having a reflux reaction, separating the solid and the liquid, washing and drying to obtain NTED-SNP; respectively adding the NTED-SNP and pyromellitic dianhydride into N,N-dimethylformamide, having a reflux reaction, separating the solid and the liquid, washing, and drying. The modified nanosilicon dioxide can be used as an adsorbent to adsorb the palladium ion in an acid leachingagent, the cost of the used material is low, the preparation process is simple, and the modified nanosilicon dioxide material is easily separated from the aqueous solution, is high in adsorptivity, and can be repeatedly used.

Description

technical field [0001] The invention relates to a modified nano silicon dioxide material and its preparation method and application, belonging to the technical field of material preparation. Background technique [0002] Palladium is an important precious metal element and an indispensable catalyst in the petroleum industry with a wide range of applications. It is an indispensable key material in high-tech fields such as aerospace, aviation, navigation, weapons and nuclear energy, as well as in the automobile manufacturing industry. With the increase of catalysts, hydrogen storage materials, and electronic materials, the amount of palladium is also increasing. There are few separate palladium ores, which are mainly extracted from by-product mines of heavy metal smelting; in addition, the solution of gold production also contains a large amount of palladium. [0003] The amount of palladium is increasing, but there are few separate palladium ores, which are mainly extracted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/26B01J20/30C02F1/28
CPCC02F1/285B01J20/26B01J20/30
Inventor 王仕兴赵继领张利波张冰王晨
Owner KUNMING UNIV OF SCI & TECH