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

An ion exchange membrane, nickel ferricyanide technology, applied in cation exchange materials, ion exchange water/sewage treatment, etc., can solve the problems of secondary pollution, large consumption of electrolyte and waste electrolyte recovery, etc., to eliminate secondary pollution. The effect of pollution, low cost, and simple capillary chemical deposition process

Inactive Publication Date: 2006-07-05
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 sequence according to the following volume ratios: 4 parts of potassium ferricyanide solution; 3 parts of water; 3 parts of nickel sulfate solution; Sodium solution 2 parts. At room temperature and in a saturated humid air environment, inject the above-mentioned film-making mixture into the capillary gap formed by the platinum sheet and the hydrophobic PVC film with a sampler, let it stand for chemical deposition for 1 hour, take it out, and let it dry naturally 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 sequence according to the following volume ratios: 7 parts of potassium ferricyanide solution; 1 part of water; 2 parts of nickel nitrate solution; 2 parts of the solution. At room temperature and in a saturated humid air environment, use a syringe pump to inject the above-mentioned film-making mixed solution into the capillary gap formed by stainless steel mesh and hydrophobic PVC film, let it stand for chemical deposition for 1.5 hours, take it out and dry it naturally at room temperature, remove the PVC film and An electroactive nickel ferricyanide ion exchange membrane is 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 sequence according to 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. At room temperature and in a saturated humid air environment, use a syringe pump to inject the above-mentioned film-making mixed solution into the capillary gap between graphite particles and hydrophobic PVC film, let it stand for chemical deposition for 2 hours, take it out and dry it naturally at room temperature, and remove the PVC film to obtain An electroactive nickel ferricyanide ion exchange membrane attached to the particle surface.

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PUM

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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 present invention relates to a preparation method and application of a nickel ferricyanide ion exchange membrane, in particular to a capillary chemical deposition method for preparing an electroactive nickel ferricyanide ion exchange membrane and its application in industrial wastewater Applications for the recovery of alkali metal ions. Background technique [0002] Nickel ferricyanide (NiHCF) is a Prussian nickel analogue. It can be produced by sedimentation of a mixed solution of divalent nickel salt and ferricyanide, or it can be anodized by nickel in ferricyanide solution or in an electrolyte containing divalent nickel salt and ferricyanide. Thin films were produced by cathodic deposition. Nickel ferricyanide (NiHCF) is a very good alkali metal ion exchanger because of its different selectivity to alkali metal ions (Cs + >Rb + >K + >Na + > Li + ), especially for Cs+ has a strong affinity, nickel ferricyanide (NiHCF) can be u...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J39/08C02F1/42B01J39/09
Inventor 郝晓刚张忠林刘世斌孙彦平
Owner TAIYUAN UNIV OF TECH
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