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Preparation method of dimercaprol modified magnetic porous cotton composite microspheres

A technology of dimercaptopropanol and composite microspheres, which is applied in the field of materials, can solve the problems of difficult solid-liquid separation of adsorbents and hinder the progress of adsorption technology, and achieve good physical and chemical stability, excellent mechanical strength, and good adsorption selection.

Inactive Publication Date: 2018-01-16
UNIV OF JINAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But at the same time, there are many shortcomings in the adsorption method. Among them, the difficulty of solid-liquid separation of the adsorbent has always been a major problem hindering the progress of adsorption technology. Therefore, in recent years, many scholars have devoted themselves to the study of magnetic adsorbents and applied them to water pollution. substance removal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Preparation of magnetic porous cotton composite microspheres: In a high-pressure reactor with a polytetrafluoroethylene lining, add 1-ethyl-3-methylimidazolium thiocyanate: 54g, absorbent cotton: 23g, seal Well, the temperature is raised to 150°C, constant temperature, constant temperature reaction for 4 hours, take out and cool to room temperature, add dextran: 8g, temperature rise to 60±2°C constant temperature, stir, react for 4h, cool to room temperature, add nano-cobalt ferrite: 7g , N, N methylene bisacrylamide: 8g, the temperature rises to 60±2°C constant temperature, vigorously stirs the reaction for 100min, sprays the viscous liquid obtained in liquid paraffin, and controls the particle size of the composite microspheres through the diameter of the nozzle. diameter, washing, solid-liquid separation, and freeze-drying to obtain magnetic porous cotton composite microspheres;

[0024] (2) Preparation of aminated magnetic porous cotton composite microspheres: I...

Embodiment 2

[0027] (1) Preparation of magnetic porous cotton composite microspheres: In a high-pressure reactor with a polytetrafluoroethylene liner, add 1-ethyl-3-methylimidazolium thiocyanate: 50g, absorbent cotton: 25g, seal Well, the temperature is raised to 150°C, constant temperature, constant temperature reaction for 4 hours, take out and cool to room temperature, add dextran: 10g, temperature rise to 60±2°C constant temperature, stir, react for 4 hours, cool to room temperature and add nano-cobalt ferrite: 8g , N, N methylene bisacrylamide: 7g, the temperature rises to 60±2°C constant temperature, vigorously stirs the reaction for 100min, sprays the viscous liquid obtained in liquid paraffin, and controls the particle size of the composite microspheres by the diameter of the nozzle diameter, washing, solid-liquid separation, and freeze-drying to obtain magnetic porous cotton composite microspheres;

[0028] (2) Preparation of aminated magnetic porous cotton composite microspheres:...

Embodiment 3

[0031] (1) Preparation of magnetic porous cotton composite microspheres: In a high-pressure reactor with a polytetrafluoroethylene liner, add 1-ethyl-3-methylimidazolium thiocyanate: 58g, absorbent cotton: 20g, seal Well, the temperature rises to 150°C, constant temperature, constant temperature reaction for 4 hours, take out and cool to room temperature, add dextran: 10g, temperature rises to 60±2°C constant temperature, stir, react for 4h, cool to room temperature, add nano-cobalt ferrite: 6g , N, N methylene bisacrylamide: 6g, the temperature rises to 60±2°C constant temperature, vigorously stirs the reaction for 100min, sprays the viscous liquid obtained in liquid paraffin, and controls the particle size of the composite microspheres through the diameter of the nozzle diameter, washing, solid-liquid separation, and freeze-drying to obtain magnetic porous cotton composite microspheres;

[0032] (2) Preparation of aminated magnetic porous cotton composite microspheres: In th...

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Abstract

The invention discloses a preparation method of dimercaprol modified magnetic porous cotton composite microspheres. The preparation method is characterized by comprising the following steps: firstly,dissolving absorbent cotton and glucan in 1-ethyl-3-methylimidazole thiocyanate to prepare magnetic porous cotton composite microspheres; then, carrying out surface amination on the magnetic porous cotton composite microspheres by the use of gamma-aminopropyl trimethoxy silane to obtain aminated magnetic porous cotton composite microspheres; and finally, adding the following ingredients accordingto the following mass percentage concentrations in a reactor: 68-74% of ethanol and 10-16% of dimercaprol; stirring and dissolving; adding 12-18% of the aminated magnetic porous cotton composite microspheres, stirring at constant temperature of 50+ / - 2 DEG C and carrying out reflux reaction for 3 h, cooling, washing with ethanol, carrying out solid-liquid separation and drying to obtain the dimercaprol modified magnetic porous cotton composite microspheres. The adsorbent has high adsorption capacity of arsenic and mercury, is low-cost and environmentally-friendly, has high mechanical strength,can be repeatedly used for more than 10 times, and is easy to separate.

Description

technical field [0001] The invention relates to a preparation method of a biological magnetic adsorbent, in particular to a preparation method of dimercaptopropanol modified magnetic porous cotton composite microspheres and an application technology for adsorption and separation of arsenic and mercury, belonging to the field of materials. Background technique [0002] With the rapid development of industry, mercury pollution refers to the environmental pollution caused by mercury or mercury-containing compounds. Mercury (Hg) is one of the most toxic heavy metal elements in the environment, and the toxicity of various mercury compounds varies greatly. Mercurylide in inorganic mercury is a highly toxic substance; phenylmercury in organic mercury decomposes quickly and is not very toxic, while methylmercury is easily absorbed when it enters the human body, is not easy to degrade, and is excreted very slowly, especially in the brain. Accumulation is the most toxic. Human activ...

Claims

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Application Information

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IPC IPC(8): B01J20/30B01J20/22B01J20/28C02F1/28C02F101/20
Inventor 李慧芝许崇娟李志英
Owner UNIV OF JINAN
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