Rapid synthesis method of drinking water treatment agent (i.e. potassium ferrate)

A drinking water treatment, potassium ferrate technology, applied in the direction of oxidation water/sewage treatment, flocculation/sedimentation water/sewage treatment, sterilization/microdynamic water/sewage treatment, etc., can solve low yield, complicated process, pollution Environmental issues, to achieve the effects of reduced production costs, simple preparation methods, and high yields

Inactive Publication Date: 2009-12-09
张亮
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] The above process is complicated, the yield is low, the by-products are not easy to handle, pollute the environment, corrode the equipment, and increase the production cost

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] 1. Prepare potassium hypochlorite (KClO) saturated solution: pass chlorine gas into the KOH solution with a mass fraction of 30% at room temperature until the chlorine gas is saturated and overflows, add an appropriate amount of solid KOH to the KClO solution, and stir until KOH is completely dissolved , low-temperature cooling and filtration to remove KCl crystals to obtain an alkaline potassium hypochlorite (KClO) solution, which can be used to obtain ClO - The mass concentration is 116g / L potassium hypochlorite (KClO) saturated solution.

[0031] 2. Move the prepared potassium hypochlorite (KClO) saturated solution to the reaction kettle, add 85% of the stoichiometric formula to process industrially pure Fe(OH) at 10°C 3 After reacting for 10 minutes, precipitate the product at 10°C for 30 minutes. Its reaction equation:

[0032] 2Fe(OH) 3 +3ClO - +4OH - →2FeO 4 2- +3Cl - +5H 2 o

[0033] 2FeO 4 2- +2K + →2K 2 FeO 4

[0034] 3. Add the product prepare...

Embodiment 2

[0042] Its steps and process conditions are as follows:

[0043] 1, prepare potassium hypochlorite (KClO) saturated solution: at normal temperature, chlorine gas is passed into the KOH solution of 35% by mass fraction, till chlorine gas saturation overflows,

[0044] Add an appropriate amount of solid KOH to the KClO solution, stir until the KOH is completely dissolved, cool and filter at low temperature to remove KCl crystals, and obtain an alkaline potassium hypochlorite (KClO) solution, which can be used to obtain ClO - The mass concentration is 125g / L potassium hypochlorite (KClO) saturated solution.

[0045] 2. Move the prepared potassium hypochlorite (KClO) saturated solution to the reaction kettle, add 90% of stoichiometric formula to process industrially pure Fe(OH) at 13°C 3 React for 20 minutes, precipitate at 13°C for 30 minutes to precipitate the product.

[0046] Its reaction equation:

[0047] 2Fe(OH) 3 +3ClO - +4OH - →2FeO 4 2- +3Cl - +5H 2 o

[0048]...

Embodiment 3

[0057] 1. Prepare potassium hypochlorite (KClO) saturated solution: pass chlorine gas into the KOH solution with a mass fraction of 40% at room temperature until the chlorine gas is saturated and overflows, add an appropriate amount of solid KOH to the KClO solution, and stir until KOH is completely dissolved , low-temperature cooling and filtration to remove KCl crystals to obtain an alkaline potassium hypochlorite (KClO) solution, which can be used to obtain ClO - The mass concentration is 134g / L potassium hypochlorite (KClO) saturated solution.

[0058] 2. Move the prepared potassium hypochlorite (KClO) saturated solution to the reaction kettle, add 95% of stoichiometric formula to process industrially pure Fe(OH) at 15°C 3 React for 30 minutes, and precipitate at 15°C for 30 minutes to precipitate the product. Its reaction equation:

[0059] 2Fe(OH) 3 +3ClO - +4OH - →2FeO 4 2- +3Cl - +5H 2 o

[0060] 2FeO 4 2- +2K + →2K 2 FeO 4

[0061] 3. Add the product m...

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PUM

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Abstract

The invention discloses a rapid synthesis method of a drinking water treatment agent (i.e. potassium ferrate). The method directly utilizes the industrial pure ferric hydroxide Fe(OH)3, the self-prepared potassium hypochlorite (KClO) saturated solution and the deionized water as raw materials for preparing potassium ferrate. The process comprises the following steps: preparing the potassium ferrate by the potassium hypochlorite (KClO) saturated solution and the industrial pure ferric hydroxide Fe(OH)3, adding the CuCl22H2O stabilizer for solid liquid separation, adding the KOH for recrystallization and purification, and washing and removing impurity by the normal pentane and the inorganic ethanol; and performing vacuum drying and sealing. The method has the advantages of simple process, good quality of the products and low production cost.

Description

Technical field: [0001] The invention belongs to the field of chemical production, and further relates to a rapid synthesis method for wet production of potassium ferrate. Background technique: [0002] At present, the preparation of potassium ferrate used as drinking water treatment has the following several methods: the one is Fe 2 o 3 with KNO 3 Heating and eutectic with KOH to generate potassium ferrate: [0003] Fe 2 o 3 +3KNO 3 +4KOH=2K 2 FeO 4 +3KNO 2 +2H 2 o [0004] The disadvantage is that it is unstable, easy to explode, very unsafe, and difficult to promote and apply. [0005] The second is the electrolysis method: iron or barbed wire is used as the anode, platinum or nickel foam is used as the cathode, and sodium hydroxide is used as the electrolyte to generate FeO at the anode. 4 2- , generating H at the cathode 2 . [0006] The overall reaction formula: [0007] This electrolysis method has serious environmental pollution, huge energy consump...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/00C01D13/00C02F1/72C02F1/50C02F1/52
Inventor 张亮
Owner 张亮
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