A Novel Crown Ether Modified Cellulose Adsorbent for Heavy Metal Adsorption

A technology of adsorption and cellulose, applied in the direction of adsorption water/sewage treatment, other chemical processes, chemical instruments and methods, etc.

Inactive Publication Date: 2017-08-25
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, there are many studies on amine-modified cellulose, but there are few reports on the preparation and adsorption properties of crown ether modified cellulose adsorbents.

Method used

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  • A Novel Crown Ether Modified Cellulose Adsorbent for Heavy Metal Adsorption

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Experimental program
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Embodiment 1

[0012] 1, a kind of preparation method to the novel crown ether modified cellulose adsorbent of heavy metal adsorption, it is characterized in that comprising the following steps:

[0013] (1) Carry out graft polymerization on the cellulose surface, after triggering the successful grafting of glycidyl methacrylate with BPO, the cellulose graft-copolymerized glycidyl methacrylate with a stable graft rate of 170% is obtained, and then Ethylenediamine is used for epoxy ring opening, and then primary amine groups are introduced.

[0014] (2) Synthesize 4-ethoxycarbonylbenzo-15-crown-5 with tetraethylene glycol and 3,4-dihydroxybenzoic acid ethyl ester as raw materials, and then obtain carboxybenzocrown ether by hydrolysis and acidification, After acyl chloride, the acyl chloride benzo crown ether is obtained.

[0015] (3) After the solvent in (2) is evaporated to dryness, it is directly reacted with the product in (1) to realize the loading of crown ether on cellulose.

[0016] ...

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Abstract

The invention belongs to the technical field of sewage treatment, and the invention relates to a novel crown ether modified cellulose adsorbent capable of adsorbing heavy metals. First, graft polymerization is carried out on the surface of cellulose, after successful grafting of glycidyl methacrylate, and then ethylenediamine is used for epoxy ring opening, and then primary amine groups are introduced; tetraethylene glycol and 3,4 Synthesize 4-ethoxycarbonylbenzo-15-crown-5 with ethyl dihydroxybenzoate as raw material, then obtain carboxybenzocrown ether through hydrolysis and acidification, and then obtain acyl chloride benzocrown ether after acyl chloride , directly react with the primary amine on the branched cellulose chain after evaporating the solvent to realize the loading of the crown ether on the cellulose. The preparation has an adsorption effect on heavy metal copper. The product of the invention is beneficial to industrialized production.

Description

technical field [0001] The invention belongs to the technical field of sewage treatment, and the invention relates to a novel crown ether modified cellulose adsorbent capable of adsorbing heavy metals. The product of the invention is beneficial to industrialized production. Background technique [0002] Cellulose is the most abundant natural resource, a kind of cheap and easy-to-obtain macromolecular natural product. It has a large number of hydroxyl groups on its polymer skeleton, which can further carry out more chemical reactions and has no secondary pollution to the environment. Therefore, cellulose-based modified adsorbents are widely used. Unmodified cellulose has very low heavy metal adsorption capacity and variable physical stability, so chemical modification of cellulose is required to obtain sufficient structural durability and effective heavy metal adsorption capacity. Among the many cellulose modification methods, the graft copolymerization modification method ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/24B01J20/30C02F1/28C02F101/20
Inventor 马庆林刘贺孟凡君柏铭闫继龙高雪川贾秋瑾
Owner SHANDONG UNIV
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