Preparation method of solid potassium ferrate

A potassium ferrate, solid technology, applied in chemical instruments and methods, iron compounds, sodium/potassium compounds, etc., can solve the problems of low yield and many influencing factors, and achieve the effect of optimizing preparation process conditions and processes

Inactive Publication Date: 2008-02-06
HUANGSHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The wet oxidation method uses hypochlorite and iron salt as raw materials, and reacts in alkaline solution to form ferrate. However, due to the many factors affecting the preparation process, the yield is not high, and the ratio of actual output to theoretical output is calculated only Can reach 80%

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] React 20g of potassium permanganate and 50ml of concentrated hydrochloric acid to generate chlorine gas. Pour it into a saturated KOH solution at 0°C. After 2 hours, slowly add a certain amount of potassium hydroxide solid to the resulting solution, stir to dissolve, cool to 0°C, and filter Potassium chloride was removed to obtain a saturated potassium hypochlorite solution. Under the condition of stirring at 25°C, slowly add ferric nitrate nonahydrate of 5% of the total weight of the solution to the above solution, finish adding within 60 minutes, continue to stir and react for 20 minutes, then slowly add solid potassium hydroxide to saturation, cool to 0°C and use sand Core funnel suction filtration. Wash the filter cake with 1mol / L potassium hydroxide several times until there is no purple color, discard the filter cake, cool the filtrate to 0°C, slowly add a certain amount of potassium hydroxide to the filtrate until saturated, and keep stirring After a large amoun...

Embodiment 2

[0014] React 20g of potassium permanganate and 50ml of concentrated hydrochloric acid to generate chlorine gas. Pour it into a saturated KOH solution at 0°C. After 2 hours, slowly add a certain amount of potassium hydroxide solid to the resulting solution, stir to dissolve, cool to 0°C, and filter Potassium chloride was removed to obtain a saturated potassium hypochlorite solution. Under the condition of stirring at 20°C, slowly add ferric nitrate nonahydrate of 10% of the total weight of the solution to the above solution, finish adding within 70 minutes, continue to stir and react for 20 minutes, then slowly add solid potassium hydroxide to saturation, cool to 0°C and use sand Core funnel suction filtration. Wash the filter cake with 1mol / L potassium hydroxide several times until there is no purple color, discard the filter cake, cool the filtrate to 0°C, slowly add a certain amount of potassium hydroxide to the filtrate until saturated, and keep stirring After a large amou...

Embodiment 3

[0016] React 20g of potassium permanganate and 50ml of concentrated hydrochloric acid to generate chlorine gas. Pour it into a saturated KOH solution at 0°C. After 2 hours, slowly add a certain amount of potassium hydroxide solid to the resulting solution, stir to dissolve, cool to 0°C, and filter Potassium chloride was removed to obtain a saturated potassium hypochlorite solution. Under the condition of stirring at 22°C, slowly add ferric nitrate nonahydrate of 4% of the total weight of the solution to the above solution, finish adding within 40 minutes, continue to stir and react for 30 minutes, then slowly add solid potassium hydroxide to saturation, cool to 0°C and use sand Core funnel suction filtration. Wash the filter cake with 1mol / L potassium hydroxide several times until there is no purple color, discard the filter cake, cool the filtrate to 0°C, slowly add a certain amount of potassium hydroxide to the filtrate until saturated, and keep stirring After a large amoun...

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PUM

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Abstract

The invention discloses a fabricating method for solid potassium ferrate, which comprises a potassium hypochlorite fabrication procedure, a potassium ferrate synthesizing procedure and a sublimating procedure; the potassium ferrate synthesizing procedure is that a ferric nitrate nonahydrate covering from 4 percent to 10 percent of a total solution weight is added into the newly fabricated saturate potassium hypochlorite under a temperature from 20-25 DEG C and mixed, a solid potassium hydroxide is added slowly to a saturate degree and mixed, and is cooled down to 0 DEG C, and is filtered to get a filter cake which is washed by the potassium hydroxide solution to completely remove purple color, and the washing filtrate is combined and cooled to 0 DEG C, the solid potassium hydroxide is slowly added with mixing process until reaching to a saturate status, after a plurality of violet black solids are separated out, which are filtered by a funnel on a temperature from 0-5 DEG C, the filter cake is washed sequentially by cyclohexane and aether, and is dried by a temperature from 60-70 DEG C; compared with the prior art, the invention optimizes the fabrication process and procedure, the yield is over 85 percent according to the ratio between the actual output and the theoretical output, which can reach to 97 percent maximally.

Description

Technical field: [0001] The invention belongs to the technical field of preparation methods of inorganic salts, in particular to the technical field of preparation methods of solid potassium ferrate. Background technique: [0002] At present, due to the massive discharge of industrial wastewater, the water body is seriously polluted and the quality of drinking water is affected. Ferrate is characterized by its strong oxidation of hexavalent iron and the reduction product Fe(OH) in water. 3 The flocculation effect can meet the dual requirements of oxidative sterilization and flocculation decontamination in water treatment, and the free Fe 3+ , Fe 2+ It also has the effect of supplementing iron and blood for the human body. Therefore, the development of ferrate has been paid more and more attention by water treatment researchers. At present, the preparation of solid potassium ferrate includes three methods: wet oxidation, dry oxidation and electrolytic oxidation. The wet o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00C01D13/00
Inventor 王靖宇陈国平周权
Owner HUANGSHAN UNIV
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