Preparation method of chelating type ion exchange resin with natural halloysite nanotube (HNT) as matrix

A halloysite nanotube and ion exchange resin technology is applied in the field of preparation of chelating ion exchange resin, which can solve the problems of complex preparation process, incapability of mass production, and high cost of carbon nanotube preparation, and achieves a short operation process. , easy operation, low cost effect

Inactive Publication Date: 2011-11-23
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the preparation cost of carbon nanotubes is high, the preparation process is complicated, an...

Method used

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  • Preparation method of chelating type ion exchange resin with natural halloysite nanotube (HNT) as matrix
  • Preparation method of chelating type ion exchange resin with natural halloysite nanotube (HNT) as matrix

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Add 100 g of halloysite nanotubes into the reactor, then add 300 g of concentrated hydrochloric acid; start heating to boiling (100° C.). Stir and pickle at boiling temperature for 6 hours, and release the material when it drops to normal temperature. The released material is filtered to remove the acid solution to obtain the acidified halloysite nanotubes; then the acidified halloysite nanotubes are washed with deionized water, and the washing is stopped when the washing water shows neutrality. Separating the halloysite and water, drying the halloysite to constant weight, and obtaining dried halloysite nanotubes. The dried halloysite nanotubes (dried halloysite with constant weight) are put into a steam saturator, and the humid air of the sodium bromide saturated solution enters the water vapor saturator, so that the halloysite nanotubes A monolayer of water molecules is formed on the surface until the water content of the hydrated halloysite is 6%, and the reaction i...

Embodiment 2

[0031] Add 100g of halloysite nanotubes into the reactor, then add 300g of concentrated hydrochloric acid; start heating to boiling (100°C), stir and pickle at boiling temperature for 6 hours, and release the material when it drops to normal temperature; the released material is filtered Finally, filter out the acid solution, then wash the halloysite with deionized water, stop washing when the washing water shows neutrality, separate the halloysite and water, and dry the halloysite to constant weight. Put the dried halloysite with constant weight into a water vapor saturator, let the moist air of the sodium bromide saturated solution enter the water vapor saturator, and make the surface of the halloysite nanotubes form a monolayer of water molecules until the hydrated When the water content of halloysite is 6%, the reaction is stopped to obtain hydrated halloysite nanotubes.

[0032] Then put the hydrated halloysite nanotubes into another reactor, put 300g of n-heptane (?) and...

Embodiment 3

[0035] Except that the weight average molecular weight of polyethyleneimine is changed to 10,000, other conditions are the same as in Example 2.

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Abstract

The invention relates to a preparation method of a chelating type ion exchange resin. The preparation method of a chelating type ion exchange resin with a natural halloysite nanotube as the matrix is characterized by comprising the steps of: taking a halloysite nanotube as the matrix and subjecting the halloysite nanotube to an acidification treatment under the condition of heating, and then washing the halloysite nanotube with deionized water until the acidified halloysite nanotube becomes neutral; introducing the humid air from a sodium bromide/potassium bromide saturated liquid reaction vessel into the water vapour saturated gas with the last step treated halloysite nanotube placed inside, thus obtaining a hydrated halloysite nanotube; subjecting the hydrated halloysite nanotube, alkane and a silane coupling agent to a silanization reaction so as to obtain a silanized halloysite nanotube, then conducting a grafting reaction to the silanized halloysite nanotube and an ethyleneimine polymer, thus obtaining the product. Characterized by brief operation process and convenient operation, the method of the invention has no need for any reagent to be added into an ion exchange column when absorbing precious metal ions, without any pollution and waste generated.

Description

technical field [0001] The invention belongs to the technical field of polymer ion exchange resins, and relates to a preparation method of a chelating ion exchange resin, in particular to a preparation method of a chelating ion exchange resin using halloysite nanotubes derived from natural mineral kaolin as a matrix . Background technique [0002] With the rapid development of society, environmental pollution control is generally concerned by people. The commonly used treatment methods for the pollution of heavy metal-containing wastewater include chemical precipitation, flocculation, solvent extraction, adsorption, and membrane filtration. Among them, the adsorption method has become a research hotspot because the adsorption material can be regenerated and reused after use. Heavy metal ion adsorption materials include inorganic materials (such as zeolite), natural polymers (such as chitosan), and artificially synthesized polymers, such as polystyrene-based resins and poly...

Claims

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Application Information

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IPC IPC(8): C08G73/04B01J45/00
Inventor 马睿陈涛暴峰王国珍严春杰仇秀梅
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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