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Method of preparing two kinds of perferrate at the same time

A technology of ferrate and potassium ferrate, applied in chemical instruments and methods, iron compounds, sodium/potassium compounds, etc., can solve the problems of many by-products, explosion, and low product purity.

Inactive Publication Date: 2007-10-17
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Ferrate usually has three kinds of preparation methods at present: (1) hypochlorite oxidation method, although this method is cumbersome to operate, consumes many raw materials, but mature, high yield, good purity; (2) electrolysis method, although this method The operation is simple, but there are many by-products, the product purity is low, and the power consumption is high; (3) high-temperature peroxide method, this method is rarely used in practice, because this method is easy to cause explosion

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Example 1: prepare 1L of KOH solution of 10mol / L, add 1g of potassium iodide as a stabilizer in the solution, feed chlorine gas into the KOH solution for 2h, and keep the temperature of the KOH solution at 30°C; then add 600g of KOH solid and stir to dissolve, control During this operation, the temperature of the solution does not exceed 35°C; the solution is cooled to 10°C and filtered, and the filtrate containing potassium hypochlorite is collected. The concentration of potassium hypochlorite in the filtrate is about 0.5mol / L, and the filter residue is mainly KCl, which is used as a by-product; Add the collected potassium hypochlorite solution and react at 25°C for 1h; stir 1L of 10mol / L KOH solution that has been cooled to 0°C for 10min and then filter, the filter residue is the crude product of potassium ferrate, and the filtrate mainly contains KOH, which is recycled ;Dissolve the crude product in 300mL 3mol / L KOH solution, and quickly filter it into an equal volume...

Embodiment 2

[0027] Example 2: Prepare 1L of KOH solution of 15mol / L, add 2g of potassium iodide as a stabilizer in the solution, feed chlorine gas into the KOH solution for 10h, and keep the temperature of the KOH solution at 0°C: then add 1000g of KOH solid and stir to dissolve, When controlling this operation, the temperature of the solution does not exceed 35°C; the solution is cooled to -10°C and filtered, and the filtrate containing potassium hypochlorite is collected. The concentration of potassium hypochlorite in the filtrate is about 1.5mol / L, and the filter residue is mainly KCl, which is used as a by-product; 150g Add ferric nitrate to the collected potassium hypochlorite solution and react at 25°C for 5 hours; stir 1L of 10mol / L KOH solution that has been cooled to 0°C for 5-10min and then filter. The filter residue is the crude product of potassium ferrate, and the filtrate mainly contains KOH, recycling; dissolve the crude product in 1.2L 3mol / L KOH solution, and quickly filte...

Embodiment 3

[0028] Embodiment 3: Similar to Examples 1 and 2, the difference is that 1.5g of potassium iodide is added as a stabilizing agent in the KOH solution, chlorine gas is passed into the KOH solution for 5h, and the temperature of the KOH solution is kept at 15°C; then 800g of KOH solid is added and Stir to dissolve, and control the temperature of the solution during this operation to not exceed 35°C; cool the solution to 2°C and filter, collect the filtrate containing potassium hypochlorite, the concentration of potassium hypochlorite in the filtrate is about 1.0mol / L, and the filter residue is mainly KCl, as a by-product; Add 100g of ferric sulfate to the collected potassium hypochlorite solution and react at 35°C for 2h; stir 1L of 10mol / L KOH solution that has been cooled to 0°C for 5min and then filter, the filter residue is the crude product of potassium ferrate, and the filtrate mainly contains KOH, recycling; dissolve the crude product in 150mL of 1.5mol / L KOH solution, and...

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PUM

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Abstract

A process for simultaneously preparing potassium ferrate and barium ferrate used for battery or water-treating material includes such steps as adding potassium iodide to KOH solution, filling Cl gas, adding KOH solid until dissolving, cooling, filtering, collecting the filtrate containing potassium hypochlorite, adding at least one of iron nitrate, iron sulfate and iron chloride, adding it to cooled KOH solution at O deg.C, filtering to obtain coarse potassium ferrate, dissolving it in KOH solution, filter, recrystallizing in KOH solution, filtering, baking the filtered dregs to obtain potassium ferrate, deluting the filtrate, cooling, mixing it with barium chloride (or acetate) in KOH solution, filtering, washing the dregs and baking to obtain barium ferrate.

Description

technical field [0001] The invention relates to a ferrate material, in particular to a method for preparing ferrate which can be used as battery and water treatment material. Background technique [0002] In 1999, Professor S. Licht, chairman of the Electrochemical Society of Israel, first proposed that ferrate can be used as a battery cathode material. This material has a high electrochemical capacity. The zinc-ferrate battery they developed has a capacity 50% higher than that of zinc-manganese batteries. above, and the reversibility and discharge platform of the battery are high. The reason why the ferrate battery has a high capacity is because the iron in the ferrate is hexavalent, and it will lose 3 electrons during discharge, while the manganese dioxide battery material currently used as a zinc-manganese battery can only lose 2 electrons at most. The nickel oxyoxide used as a nickel series rechargeable battery can only realize the gain and loss conversion of one electr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01D13/00C01F11/00C01G49/00
Inventor 廖代伟卢成慧符显珠林敬东李俊
Owner XIAMEN UNIV
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