Preparation method of porous adsorbent based on two cross-linking agents

A technology of porous adsorbent and cross-linking agent, which can be used in chemical instruments and methods, other chemical processes, etc., can solve problems such as complex properties, and achieve the effects of simple preparation, good repeatability and broad practical application prospects.

Inactive Publication Date: 2016-07-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the extraction objects of the existing adsorbents are mainly for a class of compounds, but the actual sample targets are various and complex in nature.

Method used

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  • Preparation method of porous adsorbent based on two cross-linking agents
  • Preparation method of porous adsorbent based on two cross-linking agents
  • Preparation method of porous adsorbent based on two cross-linking agents

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 1) Preparation of reaction mixture reagent: the composition of the reaction monomer mixture is 30% of 1-vinyl-3-octylimidazolium tetrafluoroborate, 0.5% of initiator azobisisobutyronitrile, Crosslinking agent 69.5%, wherein divinylbenzene:N,N'-methylenebisacrylamide=1:0.25; the composition of the porogen is 70% of n-propanol, 1,4- Butanediol 30%; by mass ratio, reaction monomer mixture: porogen=1:0.5.

[0021] 2) Polymerization reaction: Weigh the reaction monomer, crosslinking agent, porogen and initiator according to the above ratio, and ultrasonically form a homogeneous solution. Then nitrogen gas was filled for 3 minutes, the above solution was poured into a container, sealed and placed in an oven at 60° C. for polymerization reaction at a constant temperature for 4 hours.

[0022] 3) Post-treatment of the adsorbent: put the adsorbent obtained in step 2) into a beaker, use acetonitrile as a solvent, and soak until no impurities are detected in the liquid.

Embodiment 2

[0024] 1) Preparation of reaction mixture reagent: the composition of the reaction monomer mixture is 35% of 1-vinyl-3-octylimidazolium tetrafluoroborate, 1% of initiator azobisisobutyronitrile, Crosslinking agent 64%, wherein divinylbenzene:N,N'-methylenebisacrylamide=1:0.5; the composition of the porogen is 60% of n-propanol, 1,4- Butanediol 40%; by mass ratio, reaction monomer mixture: porogen=1:0.81.

[0025] 2) Polymerization reaction: Weigh the reaction monomer and porogen according to the above ratio, mix them, and ultrasonically form a homogeneous solution, then fill with nitrogen for 5 minutes, pour the above solution into a container, seal it and place it in a 70°C oven for constant temperature polymerization reaction for 18 hours .

[0026] 3) Post-treatment of the adsorbent: the adsorbent obtained in step 2) is placed in a beaker, and methanol is used as a solvent, and soaked until no impurities are detected in the liquid.

[0027] figure 1 is the infrared spect...

Embodiment 3

[0029] 1) Preparation of reaction mixture reagent: the composition of the reaction monomer mixture is 50% of 1-vinyl-3-octylimidazolium tetrafluoroborate by mass percentage, 2% of initiator benzoyl peroxide, and the remaining It is 48% of cross-linking agent, wherein divinylbenzene:N,N'-methylenebisacrylamide=1:1; the composition of said porogen is 80% of n-propanol by mass percentage, 1,4 - Butanediol 20%; by mass ratio, reaction monomer mixture: porogen = 1:1.

[0030] 2) Polymerization reaction: Weigh the reaction monomer and porogen according to the above ratio, mix them, and ultrasonically form a homogeneous solution, then fill with nitrogen for 20 minutes, pour the above solution into a container, seal it, and place it in a 75°C oven for constant temperature polymerization reaction for 24 hours .

[0031] 3) Post-treatment of the adsorbent: put the adsorbent obtained in step 2) into Soxhlet extraction, use ethanol as the solvent, and extract for 24 hours, or place the e...

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Abstract

The invention provides a preparation method of a porous adsorbent based on two cross-linking agents, and relates to an adsorbent.The method comprises the steps that 1, a reactive monomer, the cross-linking agents, a pore-foaming agent and an initiator are mixed to be uniform through ultrasound, nitrogen is introduced, the obtained solution is poured into a vessel, and the vessel is closed and then put into a drying oven for a constant-temperature polymerization reaction; 2, the product obtained in the first step is put into a Soxhlet extractor and extracted with solvent, and the porous adsorbent based on the two cross-linking agents is obtained, or the product obtained in the first step is put into the solvent and soaked till no impurity is detected out in the liquid, and the porous adsorbent based on the two cross-linking agents is obtained.The porous adsorbent is easy to prepare and good in repeatability, due to the fact that the adsorbent contains multiple functional groups such as a benzene ring, an imidazole group, an alkyl group and an amide group, and simultaneous and effective extraction on acid, neutral and alkali compounds can be achieved through pi-pi, dewatering, hydrogen bond, dipole-dipole and anion exchange interaction.Meanwhile, the obtained extraction material has the advantages of being easy to prepare, good in permeability, large in specific surface area, friendly to environment and the like.

Description

technical field [0001] The invention relates to an adsorbent, in particular to a preparation method for a porous adsorbent based on two cross-linking agents which can effectively extract mixed acidic, neutral and basic compounds simultaneously. Background technique [0002] The composition of pollutants in the environment is complex, and there are acidic, neutral, alkaline and other substances. Such as anilines (aromaticanilines, AAs) are widely used in rubber manufacturing, pesticides, dyes and chemical industries (H.Kataoka, J.Chromatogr.A733(1996) 19), are strong polar alkaline substances, in water Has high solubility (J.P.Xiao, Q.X.Zhou, X.K.Tian, ​​H.H.Bai, X.F.Su, Chinese Chem. Lett. 18 (2007) 730). [0003] Studies have shown that AAs can cause methemoglobinemia, hemolytic anemia, nervous system damage, liver and kidney damage, and are carcinogenic. The US EPA lists them as potential carcinogens (J.H.Harrison, D.J.Jollow, J.Pharmacol.Exp . Ther. 238 (1986) 1045). P...

Claims

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Application Information

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IPC IPC(8): B01J20/26B01J20/30C08F212/36C08F226/06C08F222/38C08J9/28
CPCB01J20/261B01J2220/445B01J2220/4812C08F212/36C08J9/28C08J2325/02C08F226/06C08F222/385
Inventor 黄晓佳陈蕾
Owner XIAMEN UNIV
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