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Preparation and application of ion exchange membrane of electric active nickel ferricyanide

An ion exchange membrane and nickel ferricyanide technology, which is applied in the field of preparation of nickel ferricyanide ion exchange membrane, can solve the problems of large consumption of electrolyte, recovery of waste electrolyte, secondary pollution, etc. The effect of low cost and simple capillary chemical deposition film making process

Inactive Publication Date: 2005-01-12
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to propose a preparation of electroactive nickel ferricyanide ion exchange membrane and the application of nickel ferricyanide ion exchange membrane in the waste water containing alkali metal ions to reclaim alkali metal ions, to solve the problem of consumption of a large amount in the existing membrane making process The recovery of electrolyte and waste electrolyte and the secondary pollution when nickel ferricyanide is used in the traditional ion exchange process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0013] Take 0.04M potassium ferricyanide solution, water, 0.04M nickel sulfate solution, and 0.5M sodium sulfate solution to prepare and mix in the following volume ratios in turn: 4 parts of potassium ferricyanide solution; 3 parts of water; 3 parts of nickel sulfate solution; sulfuric acid 2 parts sodium solution. Under the environment of room temperature and saturated humid air, the above-mentioned film-forming mixture was injected into the capillary gap formed by the platinum sheet and the hydrophobic PVC film with a sampler, and after standing for chemical deposition for 1 hour, it was taken out and air-dried at room temperature to remove the PVC film. That is, an electroactive nickel ferricyanide ion exchange membrane is obtained.

Embodiment 2

[0015] 0.01M potassium ferricyanide solution, water, 0.01M nickel nitrate solution, and 0.2M sodium nitrate solution were prepared and mixed in the following volume ratios: 7 parts of potassium ferricyanide solution; 1 part of water; 2 parts of nickel nitrate solution; sodium nitrate 2 parts of solution. Under the environment of room temperature and saturated humid air, inject the above-mentioned film-forming mixture with a syringe pump into the capillary gap formed by the stainless steel mesh and the hydrophobic PVC film, let it stand for chemical deposition for 1.5 hours, take it out and air dry it at room temperature, and remove the PVC film. An electroactive nickel ferricyanide ion exchange membrane was obtained.

Embodiment 3

[0017] 0.01M potassium ferricyanide solution, water, 0.05M nickel chloride solution, and 0.5M sodium chloride solution were prepared and mixed in the following volume ratios: 3 parts of potassium ferricyanide solution; 3 parts of water; 4 parts of nickel chloride solution ; 3 parts of sodium chloride solution. Under the environment of room temperature and saturated humid air, the above-mentioned film-making mixture was injected into the capillary gap between the graphite particles and the hydrophobic PVC film with a syringe pump, and after standing for chemical deposition for 2 hours, it was taken out and air-dried at room temperature, and the PVC film was removed to obtain Electroactive nickel ferricyanide ion exchange membrane attached to the particle surface.

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Abstract

A process for preparing the electroactive ion-exchanging nickel ferricyanide membrane used to treat the industrial sewage containing alkali metal ions includes generating a capillary gap between electrically conductive substrate and film, filling the solution prepared from potassium ferriccyanide, 2-valence Ni salt, Na salt and water into said gap, laying aside for chemical depositing and removing film.

Description

technical field [0001] The invention relates to a preparation method and application of a nickel ferricyanide ion-exchange membrane, in particular to an electroactive nickel ferricyanide ion-exchange membrane prepared by a capillary chemical deposition method and the nickel ferricyanide ion-exchange membrane in industrial wastewater Applications for the recovery of alkali metal ions. Background technique [0002] Nickel ferricyanide (NiHCF) is a Prussian analog of nickel. It can be prepared by precipitation of a mixed solution of divalent nickel salt and ferricyanide, or by anodic oxidation of nickel in a ferricyanide solution or in an electrolyte containing divalent nickel salt and ferricyanide Cathodic deposition was performed to produce thin films. Nickel ferricyanide (NiHCF) is a very good alkali metal ion exchanger due to its different selectivity for alkali metal ions (Cs + >Rb + >K + >Na + >Li + ), especially for Cs + With strong affinity, nickel f...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J39/09
Inventor 郝晓刚张忠林刘世斌孙彦平
Owner TAIYUAN UNIV OF TECH
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