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Diethylenetriamine modified magnetic chitosan nanometer particle adsorbent as well as preparation method and purpose thereof

A diethylenetriamine, chitosan nanotechnology, applied in chemical instruments and methods, other chemical processes, alkali metal oxides/hydroxides, etc., can solve problems such as reducing mass transfer resistance, and avoid centrifugation. The process and operation are time-saving and simple.

Inactive Publication Date: 2017-10-03
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

People often use glutaraldehyde as a cross-linking agent, but it will reduce the number of adsorption sites and limit the application of adsorbing rare earth metal ions. Therefore, we use sodium tripolyphosphate to cross-link chitosan. The network structure formed by them will not only make up the shell The disadvantage of low porosity of polysaccharides also reduces mass transfer resistance, which greatly facilitates the adsorption of rare earth metal ions

Method used

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  • Diethylenetriamine modified magnetic chitosan nanometer particle adsorbent as well as preparation method and purpose thereof
  • Diethylenetriamine modified magnetic chitosan nanometer particle adsorbent as well as preparation method and purpose thereof
  • Diethylenetriamine modified magnetic chitosan nanometer particle adsorbent as well as preparation method and purpose thereof

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Effect test

Embodiment 1

[0031] (1) Preparation of ferroferromagnetic nanoparticles

[0032] 3 mmol of ferric chloride hexahydrate was dissolved in ethylene glycol and stirred mechanically. Then, nitrogen gas was introduced. This process should last about 15 minutes. Next, 14 mmol of sodium acetate was added to the solution, and nitrogen gas was continuously introduced. At the same time, the constant temperature oil bath was set at 160°C, and the mixture was reacted for 1 hour. Finally, the product is sealed in a stainless steel autoclave. The autoclave was heated to 200°C for 10 hours and then cooled to room temperature. The black product ferric oxide magnetic nanoparticles were washed 4 times with ethanol and dried at 60° C. for 6 hours.

[0033] (2) Preparation of ferric oxide-carbon 18-chitosan-sodium phosphate tripolypolymer

[0034]This process includes two steps: one is the synthesis of ferric oxide-carbon 18 (FC). The second is the synthesis of ferric oxide-carbon 18-chitosan-sodium tri...

Embodiment 2

[0038] (1) Preparation of ferroferromagnetic nanoparticles

[0039] 3 mmol of ferric chloride hexahydrate was dissolved in ethylene glycol and stirred mechanically. Then, nitrogen gas was introduced. This process should last about 15 minutes. Next, 15 mmol of sodium acetate was added to the solution, and nitrogen gas was continuously introduced. At the same time, the constant temperature oil bath was set at 160°C, and the mixture was reacted for 1 hour. Finally, the product is sealed in a stainless steel autoclave. The autoclave was heated to 200°C for 10 hours and then cooled to room temperature. The black product ferric oxide magnetic nanoparticles were washed 4 times with ethanol and dried at 60° C. for 6 hours.

[0040] (2) Preparation of ferric oxide-carbon 18-chitosan-sodium phosphate tripolypolymer

[0041] This process includes two steps: one is the synthesis of ferric oxide-carbon 18 (FC). The second is the synthesis of ferric oxide-carbon 18-chitosan-sodium tr...

Embodiment 3

[0045] (1) Preparation of ferroferromagnetic nanoparticles

[0046] 3 mmol of ferric chloride hexahydrate was dissolved in ethylene glycol and stirred mechanically. Then, nitrogen gas was introduced. This process should last about 15 minutes. Next, 16 mmol of sodium acetate was added to the solution, and nitrogen gas was continuously introduced. At the same time, the constant temperature oil bath was set at 160°C, and the mixture was reacted for 1 hour. Finally, the product is sealed in a stainless steel autoclave. The autoclave was heated to 200°C for 10 hours and then cooled to room temperature. The black product ferric oxide magnetic nanoparticles were washed 4 times with ethanol and dried at 60° C. for 6 hours.

[0047] (2) Preparation of ferric oxide-carbon 18-chitosan-sodium phosphate tripolypolymer

[0048] This process includes two steps: one is the synthesis of ferric oxide-carbon 18 (FC). The second is the synthesis of ferric oxide-carbon 18-chitosan-sodium tr...

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Abstract

The invention provides a diethylenetriamine modified magnetic chitosan nanometer particle adsorbent as well as a preparation method and a purpose thereof. The preparation method comprises the following preparation steps of 1, preparing ferroferric oxide magnetic nanometer particles; 2, preparing ferroferric oxide-carbon 18-chitosan-sodium tripolyphosphate polymers; 3, preparing the diethylenetriamine modified magnetic chitosan nanometer particle adsorbent. The material prepared by the method provided by the invention has the advantages that the recovery of the adsorbent is convenient; the complicated centrifugation process is avoided; during the operation, the time is reduced; the operation is simple; the chitosan biological materials achieve the green and environment-friendly effects, are natural, can be degraded, and belongs to sustainable development recycled materials; the diethylenetriamine is used for modifying the chitosan, so that the adsorption site number is increased and the adsorption volume is increased.

Description

technical field [0001] The invention relates to a preparation method related to diethylenetriamine-modified magnetic chitosan nanoparticles, which is applied to recovery and adsorption of rare earth metal ions, and belongs to the technical field of material preparation and separation. Background technique [0002] Rare earth metals include scandium, yttrium, and fifteen metal elements of the lanthanide series. Rare earth metals are widely used in high-tech fields such as fluorescent lamps, batteries, lasers, information storage, and high-temperature superconductivity because of their excellent optical properties, electrical conductivity, catalytic properties, and superparamagnetism. At present, China, the United States, Australia and other countries play a leading role in the development of rare earth metal strategies, among which China supplies 90% of the world's rare earth metals. According to the survey results of the U.S. Geological Survey on the proportion of global ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/24B01J20/28B01J20/30C08B37/08C08J3/24C08L5/08C08K9/04C08K3/22C22B59/00C22B3/24
CPCB01J20/24B01J20/28004B01J20/28009C08B37/003C08J3/24C08J2305/08C08K3/22C08K9/04C08K2003/2275C08K2201/01C08K2201/011C22B3/24C22B59/00C08L5/08Y02P10/20
Inventor 刘恩利李春香郑旭东张福生刘恩秀
Owner JIANGSU UNIV
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