Method for producing sodium permanganate

A technology of sodium permanganate and potassium permanganate, applied in the directions of manganate/permanganate, etc., can solve the problems of Cl Residual, harsh reaction conditions, long reaction time, etc., and achieves easy control of reaction conditions and production steps. Simple, good product quality

Active Publication Date: 2010-11-10
广东航鑫科技股份公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional method of producing sodium permanganate is through NaOH and MnO 2 Reaction to obtain Na 2 MnO 3 , and then oxidized by chlorine gas to obtain NaMnO 4 , the steps of this production method are cumbersome, and multi-step reactions need to be carried out under the conditions of high temperature and high pressure, the reaction time is long, and it is easy to have Cl 2 residual
The application number is that the invention of 98121751.6 discloses a kind of disproportionation agent sulfuric acid to replace chlorine, so that Na 2 MnO 3 Convert to NaMnO 4 method, but it still cannot get rid of the defects of this traditional method itself, such as high equipment requirements, harsh and dangerous reaction conditions, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] 1. Reaction

[0019] Add 14m to the reaction bucket 3 React the bottom water, start stirring, pass steam to raise the temperature, add 2.0 tons of potassium permanganate and 1.0 tons of sodium fluorosilicate. Raise the temperature to 80° C. to carry out the heat preservation reaction for more than 6 hours. Then turn off the steam, the reaction solution (sodium permanganate crude liquid) is filtered through a filter press, and the filtrate enters the concentration barrel for the next step of concentration. The filter residue is unloaded to the pulping tank, and water is added to start stirring, and the temperature is raised to 70°C for rinsing by steaming. After stirring for 30 minutes, it was filtered through a filter press, and the filtrate was pumped into the reaction tank as reaction bottom water. Repeat the above rinsing process until the potassium permanganate content in the slag reaches the target. Slag discharge process, transported to the slag yard for stack...

Embodiment 2

[0029] 1. Reaction

[0030] Add 14m to the reaction bucket 3 React the bottom water, start stirring, pass steam to raise the temperature, add 1.5 tons of potassium permanganate and 1 ton of sodium fluorosilicate. Raise the temperature to 85° C. and carry out the heat preservation reaction for more than 10 hours. Then turn off the steam, the reaction solution (sodium permanganate crude liquid) is filtered through a filter press and naturally filtered, and the filtrate enters the concentration barrel for the next step of concentration. The filter residue is unloaded to the pulping tank, and water is added to start stirring, and the temperature is raised to 70°C for rinsing by steaming. After stirring for 30 minutes, it was filtered through a filter press, and the filtrate was pumped into the reaction tank as reaction bottom water. Repeat the above rinsing process until the potassium permanganate content in the slag reaches the target. Slag discharge process, transported to t...

Embodiment 3

[0040] 1. Reaction

[0041] Add 14m to the reaction bucket 3 React the bottom water, start stirring, pass steam to raise the temperature, and add 3.2 tons of potassium permanganate and 1.3 tons of sodium fluorosilicate. Raise the temperature to 95° C. to carry out the heat preservation reaction for more than 15 hours. Then turn off the steam, the reaction solution (sodium permanganate crude liquid) is filtered through a filter press, and the filtrate enters the concentration barrel for the next step of concentration. The filter residue is unloaded to the pulping tank, and water is added to start stirring, and the temperature is raised to 70°C for rinsing by steaming. After stirring for 30 minutes, it was filtered through a filter press, and the filtrate was pumped into the reaction tank as reaction bottom water. Repeat the above rinsing process until the potassium permanganate content in the slag reaches the target. Slag discharge process, transported to the slag yard for ...

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Abstract

The invention belongs to the field of chemical industry, and relates to a method for producing sodium permanganate. The method comprises the following steps of: adding water into sodium fluosilicate and potassium permanganate serving as raw materials to perform reaction at the temperature of between 70 and 95 DEG C to obtain the sodium permanganate, performing heating concentration, cooling and filtration on crude solution to obtain 50 to 52Be sodium permanganate concentrate, and diluting the sodium permanganate concentrate to obtain 40.0 to 40.5 percent sodium permanganate solution product. The production method generates the sodium fluosilicate in one step without adopting chlorine oxidation, so the production method is safe and environment-friendly; the product has good quality, and particularly has low chloride content; the reaction is finished under normal pressure, and the reaction conditions are easy to control; and the method has the advantages of simple production process, short flow and no three-waste discharge.

Description

technical field [0001] The invention belongs to the field of chemical industry and relates to a method for producing sodium permanganate. Background technique [0002] Sodium permanganate (NaMnO 4 ) has important applications in the chemical industry, and can be used as an oxidizing agent, disinfectant, fungicide, antidote for morphine and phosphorus, etc. The traditional method of producing sodium permanganate is through NaOH and MnO 2 Reaction to obtain Na 2 MnO 3 , and then oxidized by chlorine gas to obtain NaMnO 4 , the steps of this production method are cumbersome, and multi-step reactions need to be carried out under the conditions of high temperature and high pressure, the reaction time is long, and it is easy to have Cl 2 residual. The application number is that the invention of 98121751.6 discloses a kind of disproportionation agent sulfuric acid to replace chlorine, so that Na 2 MnO 3 Convert to NaMnO 4 method, but it still cannot get rid of the defects ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12
Inventor 杨观杨海
Owner 广东航鑫科技股份公司
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