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Reactor and system for preparing potassium manganate

A reactor, potassium manganate technology, applied in manganate/permanganate and other directions, can solve the problems of the preparation method of potassium manganate needs to be improved, the conversion rate of manganese dioxide is low, the recovery rate of KOH is low, etc., to achieve energy saving Remarkable environmental protection effect, efficient preparation and high heat utilization rate

Active Publication Date: 2014-02-12
YUNNAN JIANSHUI MANGANESE
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AI Technical Summary

Problems solved by technology

Due to the limitations of the process itself and the MnO 2 Powder activity is poor, MnO 2 The oxidation reaction is not complete, resulting in MnO 2 low conversion rate
In the process of preparing potassium permanganate by liquid phase oxidation, the preparation process of potassium manganate still has the problems of low conversion rate of manganese dioxide, low recovery rate of manganese and KOH, high energy consumption, and serious environmental pollution.
[0003] Thereby, the preparation method and the equipment of potassium manganate still need to be improved at present

Method used

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  • Reactor and system for preparing potassium manganate
  • Reactor and system for preparing potassium manganate
  • Reactor and system for preparing potassium manganate

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preparation example Construction

[0066] The above part has described in detail the system for preparing potassium manganate of the present invention. In order to better understand the system, the method that can be implemented using the system will be described in detail below.

[0067] According to still another aspect of the present invention, the present invention proposes a method for preparing potassium manganate. According to an embodiment of the present invention, refer to Figure 4 , the method includes the following steps:

[0068] S100 In an oxygen-enriched atmosphere, the first potassium hydroxide solution is oxidized with manganese dioxide to obtain potassium manganate feed liquid

[0069] Firstly, in an oxygen-enriched atmosphere, the first potassium hydroxide solution is oxidized with manganese dioxide, so as to obtain a potassium manganate feed solution. Wherein, the chemical reaction mainly involved in this step is: 2MnO 2 +4KOH+O 2 →2K 2 MnO 4 ↓+2H 2 O.

[0070] According to the embod...

Embodiment 1

[0092] use figure 1 or figure 2 The reactor shown, and image 3 Shown system, according to the method for preparing potassium manganate described above, prepare potassium manganate according to the following steps:

[0093] a. Oxidation reaction: the first potassium hydroxide solution with a concentration of 45-70% by weight is mixed with pyrolusite in a ratio of 1:5-15 according to the mass ratio of manganese dioxide and potassium hydroxide in the first potassium hydroxide solution Ore slurry is formed, and oxidation reaction is carried out in an oxygen-enriched atmosphere at 250-260 degrees Celsius and 0.2-1.2Mpa to obtain potassium manganate feed liquid;

[0094] b. Solid-night separation: After the potassium manganate feed liquid is allowed to stand for an appropriate time, solid-liquid separation is carried out so as to obtain supernatant and underflow respectively;

[0095] c. Stay crystal growth: use the second potassium hydroxide solution to adjust the Baume degree...

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Abstract

The invention discloses a reactor and system for preparing potassium manganate. The reactor comprises a body, an ore pulp heating device and a stirring device, wherein a reaction space is limited in the body, an oxygen inlet, a waste oxygen outlet and a feeding port are formed in the top of the body at an interval, and a discharging port is formed in the upper-middle part of the body; the oxygen inlet is used for delivering oxygen or oxygen-enriched air to the reaction space, and the waste oxygen outlet is used for discharging residual oxygen and water vapor in the reaction space; the feeding port is used for delivering ore pulp into the reaction space, and the discharging port is used for discharging potassium manganate material liquid obtained after the oxidizing reaction of ore pulp in the reaction space; the ore pulp heating device is arranged in the body and is used for heating the ore pulp to 250-260 DEG C; the stirring device is arranged at the inner part of the body and is used for stirring the ore pulp. The reactor can efficiently prepare potassium manganate, has the advantages of simple structure, convenience in operation, cleanness and environmental friendliness, and is easy to realize industrialized mass production.

Description

technical field [0001] The invention relates to the field of chemical industry, in particular to a reactor and a system for preparing potassium manganate. Background technique [0002] At present, the preparation technology of industrial potassium permanganate is mainly divided into solid-phase oxidation method and liquid-phase oxidation method. Due to the limitations of the process itself and the MnO 2 Powder activity is poor, MnO 2 The oxidation reaction is not complete, resulting in MnO 2 Low conversion rate. In the process of preparing potassium permanganate by liquid phase oxidation, the preparation process of potassium manganate still has the problems of low conversion rate of manganese dioxide, low recovery rate of manganese and KOH, high energy consumption and serious environmental pollution. [0003] Therefore, the preparation method and equipment of potassium manganate still need to be improved. Contents of the invention [0004] The present invention aims t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G45/12
Inventor 王吉坤嵇晓沧闫江峰刘大雄马进张红耀户少勇彭东杨世诚李天杰纳吉兴杭祖辉
Owner YUNNAN JIANSHUI MANGANESE
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