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Preparation method of dimercaptosuccinic-acid modified porous magnetic composite microspheres

A technology of magnetic composite microspheres and dimercaptosuccinic acid, which is applied in the field of materials, can solve the problems that hinder the progress of adsorption technology and the difficulty of solid-liquid separation of adsorbents, and achieve good physical and chemical stability, excellent mechanical strength and fast speed. Effect

Inactive Publication Date: 2017-12-15
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

[0022] (1) Preparation of porous magnetic composite microspheres: In a polytetrafluoroethylene-lined autoclave, add 1-ethyl-3-methylimidazole diethyl phosphate salt: 68g, absorbent cotton: 15g, seal Well, the temperature rises to 120°C, constant temperature, constant temperature reaction for 6 hours, take out and cool to room temperature, add starch: 6g, temperature rises to 100±2°C constant temperature, stir, react for 1h, cool to room temperature, add nano-zinc ferrite: 6g, Di Ethyltriamine: 5g, the temperature is raised to 100±2°C, and the reaction is vigorously stirred for 20 minutes. The obtained viscous liquid is sprayed in water, and the diameter of the nozzle is used to control the particle size of the composite microspheres. Cleaning, solid-liquid separation, freeze-drying to obtain porous magnetic composite microspheres;

[0023] (2) Preparation of aminated porous magnetic composite microspheres: In the reactor, add ethanol: 61 mL, γ-aminopropyltrimethoxysilane: 35 g...

Embodiment 2

[0026] (1) Preparation of porous magnetic composite microspheres: In a polytetrafluoroethylene-lined autoclave, add 1-ethyl-3-methylimidazole diethyl phosphate salt: 65g, absorbent cotton: 13g, seal Well, the temperature rises to 120°C, constant temperature, constant temperature reaction for 6 hours, take out and cool to room temperature, add starch: 8g, temperature rises to 100±2°C constant temperature, stir, react for 1h, cool to room temperature, add nano-zinc ferrite: 10g, Disuba Ethyltriamine: 4g, the temperature is raised to 100±2°C, and the reaction is vigorously stirred for 20 minutes. The obtained viscous liquid is sprayed in water, and the diameter of the nozzle is used to control the particle size of the composite microspheres. Cleaning, solid-liquid separation, freeze-drying to obtain porous magnetic composite microspheres;

[0027] (2) Preparation of aminated porous magnetic composite microspheres: In the reactor, add ethanol: 58 mL, γ-aminopropyltrimethoxysilane:...

Embodiment 3

[0030](1) Preparation of porous magnetic composite microspheres: In a polytetrafluoroethylene-lined autoclave, add 1-ethyl-3-methylimidazole diethyl phosphate salt: 70g, absorbent cotton: 14g, seal Well, the temperature rises to 120°C, constant temperature, constant temperature reaction for 6 hours, take out and cool to room temperature, add starch: 5g, temperature rises to 100±2°C constant temperature, stir, react for 1h, cool to room temperature, add nano-zinc ferrite: 5g, Di Ethyltriamine: 6g, the temperature is raised to 100±2°C, and the reaction is vigorously stirred for 20 minutes. The obtained viscous liquid is sprayed in water, and the diameter of the nozzle is used to control the particle size of the composite microspheres. Cleaning, solid-liquid separation, freeze-drying to obtain porous magnetic composite microspheres;

[0031] (2) Preparation of aminated porous magnetic composite microspheres: In the reactor, add ethanol: 63 mL, γ-aminopropyltrimethoxysilane: 32 g,...

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Abstract

The invention discloses a preparation method of dimercaptosuccinic-acid modified porous magnetic composite microspheres. The preparation method is characterized by comprising the following steps: firstly dissolving degreasing cotton and starch in 1-ethyl-3-methylimidazole diethyl phosphate, and adding nano zinc ferrite to prepare and obtain aminated porous magnetic composite microspheres; and then adopting gamma-aminopropyltrimethoxysilane to aminate the surfaces of the porous magnetic composite microspheres so as to obtain aminated porous cotton magnetic composite microspheres; finally adding the following components in percent by weight, namely 62-68% of methanol and 15-20% of dimercaptosuccinic acid, into a reactor, stirring for dissolving, adding 15-20% of aminated porous magnetic composite microspheres, stirring at a constant temperature of 60+ / -2 DEG C, stirring, reacting for 3 hours, cooling, carrying out solid-liquid separation, and drying to obtain the dimercaptosuccinic-acid modified porous magnetic composite microspheres. The dimercaptosuccinic-acid modified porous magnetic composite microspheres have high absorbing capacity for lead and mercury, is low in cost, is environment-friendly, can be repeatedly used for more than 10 times due to high mechanical strength, and is easy in separation.

Description

technical field [0001] The invention relates to a preparation method of a biomagnetic adsorbent, in particular to a preparation method of dimercaptosuccinic acid modified porous magnetic composite microspheres and an application technology for adsorption and separation of lead 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 activities cause m...

Claims

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Application Information

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IPC IPC(8): B01J20/28B01J20/30C08J7/14C08J7/12C08L1/02C08L3/02C08K3/24C02F1/28C02F101/20
CPCB01J20/28009B01J20/28021B01J20/28054B01J20/28057B01J2220/44C02F1/28C02F2101/20C08J7/12C08J7/14C08J2301/02C08J2403/02C08K2201/01C08K2201/011C08L1/02C08L3/02C08K3/24
Inventor 李慧芝赵淑英翟殿棠
Owner UNIV OF JINAN
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