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Magnetic polydivinylbenzene microsphere resin and its preparation method and application

A technology of polydivinyl benzene and microspheres, which is applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc., and can solve the problems of poor particle sphericity, wide particle size distribution, and low specific surface area , to achieve the effect of good spheroidization, excellent modification effect and high specific surface area

Active Publication Date: 2021-06-25
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, all the microsphere resins prepared on the market contain polar or non-polar monomers, and the raw materials are relatively complex and the specific surface area is low.
The particle size distribution of existing microsphere resins is different due to different dispersants. The magnetic microspheres mainly prepared with polyvinyl alcohol as a dispersant on the market have the disadvantages of wide particle size distribution and poor spheroidization.
In order to improve the performance of the adsorption resin, the existing resin microspheres used for adsorption treatment usually use two or more raw material monomers for polymerization, and there are generally post-modification steps, and the operation is relatively complicated.

Method used

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  • Magnetic polydivinylbenzene microsphere resin and its preparation method and application
  • Magnetic polydivinylbenzene microsphere resin and its preparation method and application
  • Magnetic polydivinylbenzene microsphere resin and its preparation method and application

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preparation example Construction

[0037] A preparation method of magnetic polydivinylbenzene microsphere resin, comprising the following steps:

[0038](1) Modification of magnetic particles: the purpose of this step is to use the magnetic metal oxide nanoparticles modified with lipophilic organic matter as the magnetic core. The magnetic nanoparticles are taken and refluxed in ethanol or methanol at 60° C. to 100° C. for 10 minutes to 120 minutes, and then dried to activate the magnetic particles and clean the magnetic particles. Add the dried magnetic nanoparticles to the three-neck round-bottomed flask that is equipped with deionized water dripped with ammonia, the concentration of ammonia is 25wt.%~28wt.%; the volume ratio of ammonia and deionized water is 1: (50~100). Adjust the stirring speed to 200rpm~1000rpm, pass nitrogen or argon gas into the solution to remove dissolved oxygen in the solution, then raise the temperature to 60°C~120°C under nitrogen or argon atmosphere, and drop into the mixture On...

Embodiment 1

[0050] A preparation method of magnetic polydivinylbenzene microsphere resin of the present invention, comprises the steps:

[0051] (1) Synthesis of oil-soluble magnetic materials:

[0052] Nanomagnetic Fe 3 o 4 After 100mL of ethanol was refluxed at 80°C for 30min, cooled and dried. The dried 5g magnetic Fe 3 o 4 Add 2.5mL ammonia water (25wt.%~28wt.%) dropwise into a 500mL three-neck flask with 250mL deionized water, adjust the stirring speed to 450rpm, feed nitrogen, stir for 30min, remove dissolved oxygen in the water, and raise the temperature to 85°C, and drop into 25mL of acetone dissolved with 5g of oleic acid. After reacting for 10 minutes, add 5g of oleic acid dropwise. The magnetic nanoparticles are modified multiple times to make the modification effect better, and the reaction is continued for 30 minutes. After cooling, adjust the pH of the mixed solution obtained after the reaction to 7 with hydrochloric acid, remove the self-assembly effect between the mod...

Embodiment 2

[0058] A preparation method of magnetic polydivinylbenzene microsphere resin of the present invention, comprises the steps:

[0059] (1) Synthesis of oil-soluble magnetic materials:

[0060] Nanomagnetic γ-Fe 2 o 3 After 100mL of ethanol was refluxed at 80°C for 30min, cooled and dried. Take dried 5g magnetic γ-Fe 2 o 3 Add a 500mL three-neck flask containing 250mL deionized water to which 2.5mL ammonia water (25wt.%~28wt.%) has been added dropwise, adjust the stirring speed to 450rpm, feed nitrogen, stir for 30min, remove dissolved oxygen in the water, and raise the temperature to 85°C, and 25 mL of acetone dissolved with 5 g of oleic acid was added dropwise, and after 10 minutes of reaction, 5 g of oleic acid was added dropwise, and the reaction was continued for 30 minutes. After cooling, adjust the pH of the mixed solution to 7 with hydrochloric acid, and then use a magnet for magnetic γ-Fe 2 o 3 The particles were separated, washed with methanol, and dried in vacuo...

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Abstract

The invention discloses a magnetic polydivinylbenzene microsphere resin and its preparation method and application. The magnetic polydivinylbenzene microsphere resin includes a polydivinylbenzene microsphere resin skeleton and magnetic particles, and the magnetic particles are evenly distributed in the polydivinylbenzene In the benzene microsphere resin skeleton, the specific surface area of ​​the magnetic polydivinylbenzene microsphere resin is 800m 2 / g~1200m 2 / g. The preparation method comprises: preparing a dispersion liquid in which the dispersant is a mixture of gelatin, trisodium phosphate and disodium hydrogen phosphate; adding modified magnetic particles, divinylbenzene, a porogen and an initiator to the dispersion liquid to carry out a polymerization reaction ; The resulting product is washed and dried to obtain a magnetic polydivinylbenzene microsphere resin. The magnetic polydivinylbenzene microsphere resin of the present invention has large specific surface area, narrow particle size distribution, good spheroidization and high reusability, and can be used for efficient removal of nitrobenzene compounds; the preparation method is simple in operation and short in process flow , short time-consuming, simple raw materials, and low cost.

Description

technical field [0001] The invention relates to the field of adsorption materials for nitrobenzene pollutants, in particular to magnetic polydivinylbenzene microsphere resin and its preparation method and application. Background technique [0002] Nitrobenzenes are widely used in the production of different types of products such as dyes, explosives and pesticides. It is often released during the production of explosives, organic chemicals and plastics, among other things. Nitrobenzenes are carcinogenic pollutants that may pose high ecological and human health risks even at low concentrations. Due to their toxicity, nitrobenzenes are listed as priority pollutants by the US Environmental Protection Agency. Therefore, increasing attention has been paid to the removal of nitrobenzene compounds from aqueous environments. Conventional methods for removing nitrobenzene compounds from aqueous solutions can be divided into three categories: physical methods, chemical methods, and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08F112/36C08F2/44C08F2/20C08K9/04C08K3/22C08J9/28B01J20/26B01J20/28B01J20/30C02F1/28C02F101/38
CPCB01J20/261B01J20/28009B01J20/28021B01J2220/4812C02F1/285C02F2101/38C08F112/36C08J9/009C08J9/28C08J2325/02C08K3/22C08K9/04C08K2003/2272C08K2003/2275C08F2/44C08F2/20
Inventor 邹晓蓉何香陶呈安王建方王芳黄坚阳绪衡
Owner NAT UNIV OF DEFENSE TECH