Process for synthesizing weakly alkaline anionic exchange resin with double functions and superhigh cross-linking

A technology of ultra-high cross-linking and exchange resin, which is applied in anion exchange, ion exchange, chemical instruments and methods, etc. It can solve the problems such as the synthesis method of ultra-high cross-linking weak base anion exchange resin that has not been seen, and achieve excellent application performance , the effect of broad application prospects

Inactive Publication Date: 2002-05-01
南京大学环境学院
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Problems solved by technology

Literature search shows that there is no synthetic method of ultra-high cross-linked weak base anion exchange resin in existing literature reports

Method used

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Embodiment

[0008] Using liquid wax as a porogen, styrene and divinylbenzene are copolymerized to form a cross-linked body-shaped network structure, and the liquid wax is extracted with a low boiling point solvent such as acetone. The macroporous white spherical beads react with chloromethyl ether under the catalysis of zinc chloride to carry out chloromethyl reaction, introduce chloromethyl groups on the macroporous white balls, wash and dry the chloromethylated low cross-linked polystyrene, and then Use nitrobenzene as a solvent and zinc chloride as a catalyst to carry out a post-crosslinking reaction. By controlling the residual chlorine content of the synthetic resin, a series of ultra-high crosslinked resins with different chlorine contents are obtained, and then aminated with dimethylamine. Then introduce tertiary amine groups on the ultra-high cross-linking resin to prepare a series of ultra-high cross-linking weak base anion exchange resins.

[0009] I. Aggregation

[0010] (1) M...

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Abstract

A series of ultrahigh-cross-linked weakly alkaline-anionic exchange resin with both adsorption and exchange functions, which has different specific surface areas and exchange capacities, is prepared from low-cross-linked macroporous polystyrene through chloromethylation, cross-linking reaction, where the nitrobenzene or substituted nitrobenzene is used as solvent and the Lewis acid is used as catalyst, and amination by dimethylamine.

Description

technical field [0001] The invention relates to a preparation method of an ultrahigh cross-linked weak base anion exchange resin with dual functions of adsorption and exchange, belonging to the field of ion exchange and adsorption resins. Background technique [0002] The ultra-high cross-linked weak base anion exchange resin with dual functions of adsorption and exchange has important uses in the fields of natural medicine extraction, enrichment and separation of organic matter in water, and wastewater treatment. There are few documents about ultra-highly cross-linked weak base resins, and only Purolite international Ltd. has reported the performance of a kind of ultra-highly cross-linked weak base anion exchange resin Hypersol-Macronet MN-300 synthesized by the company (The Purolite Company , 1995, Purolite Technical Bulletin, Hypersol-Macronet TM Sorbent Resins). Literature search shows that there is no synthesis method of ultra-highly cross-linked weak base anion exch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J41/14
Inventor 张全兴李爱民刘福强费正皓潘丙才龙超陈金龙
Owner 南京大学环境学院
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