Ion exchange fiber and its preparation method and use

A technology of ion exchange fiber and acrylonitrile, applied in the field of chemistry, can solve the problems of ion exchange fiber adsorption that have not been reported, and achieve the effects of fast speed, convenient regeneration and high adsorption capacity

Inactive Publication Date: 2003-08-27
FUDAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In summary, the currently developed fibrous adsorbents are mainly used for the adsorption of metal cations in aqueous solutions, such as: heavy metal ions, noble metal ions, or removal of harmful anions in water, such as: F - , PO 4 3- , SO 2- 4 , but for organic solutions or solvents (HF, HCl, HBr, HI, H 2 SO 4 , H 3 PO 4 , HNO 3 , LiHPO 3 F etc.) acidic substances and transition metal ions and heavy metal ions have no report on the ion-exchange fiber with adsorption properties; also there is no report to adopt ion-exchange fiber to adsorb the acidic substance in organic solution or solvent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 5g of acrylonitrile-methyl methacrylate-itaconic resin terpolymer fiber, place it in a 250ml round bottom flask, add 150ml of diethylenetriamine with a concentration of 20% by volume, and carry out cross-linking at 105°C Reacted for 8 hours; after the reaction, the fiber was placed in a 500ml round bottom flask, and at 120°C, reacted with 300ml of ethylenediamine with a volume percentage concentration of 15% for 5-7 hours; Washing with distilled water, washing with steam at 110°C; then washing with distilled water at 20-60°C, drying in vacuum at 50-60°C to obtain basic ion exchange fibers.

Embodiment 2

[0022] Weigh 5g of acrylonitrile-methyl methacrylate-itaconic resin terpolymer fiber, place it in a 150ml round bottom flask, add 30ml of diethylenetriamine with a concentration of 15% by volume, and carry out cross-linking at 100°C React for 5 hours; after the reaction, place the fiber in a 250ml round-bottomed flask, and react with 150ml of ethylenediamine with a volume percentage concentration of 15% at 90°C for 7 hours; Washing with distilled water and steam at 150°C; then washing with distilled water at 20-60°C, drying in vacuum at 50-60°C to obtain basic ion exchange fibers.

Embodiment 3

[0024] The above-mentioned basic ion-exchange fiber adsorbent 100g by vacuum drying is packed in the ion-exchange column, and the ion-exchange fiber in this column is washed with organic solvent 3000ml; Then inject the organic solution 5000ml of lithium hexafluorophosphate (commercially available) from the top of the exchange column , by gravity, the organic solution passes through the ion exchange fiber column. In the column, the acidic substance from the organic solution of lithium hexafluorophosphate reacts chemically with the basic groups on the ion exchange fiber, and as a result, the acidic substance is combined on the ion exchange fiber; at the same time, the transition metal ions and heavy metal ions from the organic solution of lithium hexafluorophosphate react with the The functional groups on the ion exchange fibers undergo a chelation reaction, and as a result these transition metal ions and heavy metal ions are bound to the ion exchange fibers. The original organi...

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PUM

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Abstract

The present invention relates to an ion-exchange fibre, its synthesis method and application. Said alkaline ion-exchange fibre adsorbent is acrylonitrile-methyl methacrylate-itaconate tripolymer containing amino functional group, can remote the acidic matter, transition metal ion and heavy metal ion from non-aqueous solution or non-aqueous solvent. Said invention is simple in preparation of product, and the adsorption volume of adsorbing acidic impurity from non-water is high, and its adsorption speed is high, its chemical property is stable. In the purification of lithium electrolyte by using said product the condition for removing impurity is moderate, at the same time of removing acidic impurity, the impurity into also can be removed.

Description

technical field [0001] The invention belongs to the field of chemistry, and relates to an ion exchange fiber, a preparation method thereof, and an application thereof. Specifically, the present invention relates to an ion exchange fiber capable of removing acidic substances, transition metal ions and heavy metal ions in organic solutions or solvents. Background technique [0002] With the strict requirements of high-tech for high-purity substances, countries around the world are increasingly enthusiastic about the exploration and research of high-purity substances, and the battery industry is particularly prominent in this regard. The higher the purity of the electrolyte of the lithium battery, the better its performance; the trace amount of HF contained in the preparation of the electrolyte has a huge negative impact on the performance of the lithium battery. In view of this problem, three types of methods are mainly used in the world at present: the first type is the orga...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J43/00C08J5/20H01M6/16
Inventor 杜立春
Owner FUDAN UNIV
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