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Novel dipolar membrane and use thereof in electrolysis preparation of ferrate

A ferrate and bipolar membrane technology, applied in the field of electrochemistry, can solve the problems of low concentration of sodium ferrate products, complex process, low current efficiency, etc., and achieve the effects of easy promotion, cost reduction, and smooth current efficiency

Inactive Publication Date: 2006-11-22
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The invention has the advantage of overcoming the defects of low product concentration and low current efficiency in the preparation of sodium ferrate by the existing electrolytic method, but the process is complicated and takes a long time

Method used

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  • Novel dipolar membrane and use thereof in electrolysis preparation of ferrate
  • Novel dipolar membrane and use thereof in electrolysis preparation of ferrate
  • Novel dipolar membrane and use thereof in electrolysis preparation of ferrate

Examples

Experimental program
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Effect test

Embodiment 1

[0028] The preparation of anodic film: take by weighing 3 grams of sodium carboxymethylcellulose in a 500ml beaker, heat on low fire, add distilled water 100ml while stirring, be mixed with the aqueous solution of 3% sodium carboxymethylcellulose (CMC), through After decompression and decolorization into a colorless, transparent and viscous film, cast it on a clean and smooth glass plate; after 24 hours of natural drying to form a film, soak it in 0.5% FeCl 3 In the solution for 8 minutes, take it out and dry it naturally to obtain the anode film.

[0029] The preparation of cathode film: take by weighing 3 grams of chitosan (CS) in a 500ml beaker, stir and dissolve with 2% acetic acid aqueous solution, be mixed with 100ml chitosan acetic acid aqueous solution, slowly add dropwise the glutaraldehyde of 3ml 0.25%, At the same time, the stirring speed was increased, and after being decolorized under reduced pressure into a light yellow viscous film liquid, it was cast on the pre...

Embodiment 2

[0032] The preparation of cathode film: take by weighing 3 grams of sodium carboxymethylcellulose in a 500ml beaker, heat on low heat, add about 100ml of distilled water while stirring, and be mixed with an aqueous solution of 3% sodium carboxymethylcellulose (CMC), After being decolorized under reduced pressure into a colorless, transparent and viscous film, cast it on a clean and smooth glass plate, and after 30 hours of natural drying to form a film, soak it in 0.5% FeCl 3 In the solution for 15 minutes, take it out and dry it naturally to obtain the anode film.

[0033] Preparation of cathode film: take 3 grams of chitosan (CS) in a 500ml beaker, stir and dissolve with 2% acetic acid aqueous solution, prepare 100ml chitosan acetic acid aqueous solution, slowly add 4.5ml 0.25% glutaraldehyde dropwise At the same time, the stirring speed was increased, and after being decolorized under reduced pressure into a light yellow viscous film liquid, it was cast on the pre-prepared ...

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Abstract

The invention discloses a new bipolar film and utility in the ferrate, which comprises the following steps: adopting 3 percent sodium carboxymethylcellulose aqueous solution; stirring; heating; decompressing; decolouring; proceeding doctor-blade casting process on the glass board; drying to form film; immersing in the FeCl3 solution for several min; drying to produce positive electrode film; dissolving chitose through 2 percent acetate aqueous solution to prepare chitose acetate aqueous solution; stirring; decompressing; decolouring; proceeding doctor-blade casting process on the glass board; drying to form CS-CMC polymeric bipolar film of negative and positive electrode; utilizing the prepared CS-CMC polymeric bipolar film as negative and positive electrode to electrolyze ferrate at 30-40mA .cm-2 condition. The invention modifies chitose into insoluble negative ion exchanging film, which satisfies high-current density working need.

Description

technical field [0001] The invention relates to a novel bipolar membrane and the application of the bipolar membrane in electrogenerating ferrate, which belongs to the field of electrochemistry. technical background [0002] Bipolar membrane (BM) is a new type of ion exchange composite membrane, which is usually composed of anion exchange layer (CM) and cation exchange layer (AM), and is a real reaction membrane. Under the action of a DC electric field, the bipolar membrane can dissociate water, and hydrogen ions and hydroxide ions are obtained on both sides of the membrane. Bipolar membrane electrodialysis technology has played a unique role in optimizing traditional industrial processes and new industrial processes. After decades of research and development in the manufacturing process of bipolar membranes in foreign countries, practical application has been basically realized. In China, research in this area has just begun and is still in the research stage, which greatl...

Claims

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Application Information

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IPC IPC(8): C25B13/08B01D69/06B01D69/12B01D71/08C25B1/00
Inventor 陈震郑曦陈日耀陈晓任羽西
Owner FUJIAN NORMAL UNIV
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