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A kind of preparation method of potassium permanganate

A potassium permanganate and carbonate technology, applied in manganate/permanganate, chemical instruments and methods, manganese compounds, etc., can solve the problems of low product purity, poor production environment, long production cycle, etc. Achieve the effect of high atomic utilization, easy control and high safety

Active Publication Date: 2021-11-09
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Description
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  • Application Information

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Problems solved by technology

However, there are still many problems in this traditional liquid-phase method, such as the consumption of a large amount of high-concentration potassium hydroxide, intermittent boiler operation, poor production environment, long production cycle, and low product purity. It is urgent to develop a new preparation method that is clean and efficient Preparation of High Purity Potassium Permanganate

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  • A kind of preparation method of potassium permanganate
  • A kind of preparation method of potassium permanganate
  • A kind of preparation method of potassium permanganate

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Embodiment 1

[0037] According to the technical scheme of the present invention, the solid-phase method synthesizes novel oxide Ba 3 mn 2 o 8 Primary powder, mix 59.2g of barium carbonate and 17.4g of manganese dioxide and sinter at 900°C in air for 24 hours to obtain Ba with trigonal structure 3 mn 2 o 8 Solid powder, X-ray diffraction results are as follows figure 1 shown. Ba 3 mn 2 o 8 diffraction peaks.

[0038] The above obtained novel oxide 5gBa 3 mn 2 o 8 Put directly into deionized water, heat and stir, control the temperature of the suspension to 50°C, and stir at a speed of 200r / min, the suspension will turn purple and the color will continue to deepen. After 2h, let it stand for 1h to settle the solid particles, filter the supernatant, add 2g of KOH solid, and blow in CO with a flow rate of 30mL / min. 2 , control the pH value to be greater than 7 to completely precipitate Ba ions, filter to obtain a purple-red supernatant, slowly heat and stir to crystallize, and obt...

Embodiment 2

[0040] According to the technical scheme of the present invention, the solid-phase method synthesizes novel oxide Mg 3 mn 2 o 8 , Ca 3 mn 2 o 8 、Sr 3 mn 2 o 8 、Ba 3 mn 2 o 8 The primary powder was calcined in air at 1050°C, 1000°C, 950°C, and 900°C for 24 hours respectively. Take 5g of each of the four oxides into the same amount of deionized water, heat and stir, control the temperature of the suspension at 50°C, and stir at a speed of 200r / min, the suspension turns purple and the color continues to deepen. After 2h, let it stand for 1h to settle the solid particles, filter the supernatant, add 2g KOH solid each, and blow in CO with a flow rate of 30mL / min. 2 , control the pH value greater than 7 to completely precipitate Mg, Ca, Sr, and Ba ions, and filter to obtain a purple supernatant. Slowly heated and stirred for crystallization, and purple-red potassium permanganate crystals were obtained, and the detected purity was 63%, 85%, 92%, and 95%, respectively. Th...

Embodiment 3

[0042] According to the technical scheme of the present invention, novel oxide Ca is synthesized by solid-phase method 3-x Mg x mn 2 o 8 ,Sr 3-x Ca x mn 2 o 8 、Ba 3- x Sr x mn 2 o 8 (x=0.1, 0.5, 1, 2) primary powder, adjust the calcination temperature and holding time, and sinter at high temperature in air to obtain solid powder. The preparation conditions are shown in Table 1. Take 5g of each of the 12 kinds of oxides and put them into the same amount of deionized water respectively, and put the four kinds of oxides of the same amount into the same amount of deionized water respectively, heat and stir, control the temperature of the suspension to 50°C, and the stirring speed to 200r / min, The suspension turned purple and deepened in color. After 2h, let it stand for 1h to settle the solid particles, filter the supernatant, add 2g of KOH solid, and blow in CO with a flow rate of 30mL / min. 2 , control the pH value to be greater than 7 to completely precipitate the i...

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Abstract

The invention provides a method for preparing potassium permanganate crystals. In this method, a novel trigonal structure composite metallization M 3‑ x A x mn 2 o 8 As an intermediate reaction material, the oxide and water, KOH or K 2 CO 3 and CO 2 reaction, and then filtered and dried to obtain high-purity potassium permanganate crystals. The method of the present invention can be reacted in an aqueous solution system below 100°C, and does not require high-concentration KOH, and is highly efficient and safe. Add an appropriate amount of MnO to the residue after the metal oxide reaction of the present invention 2 Afterwards, the intermediate material can be obtained again by mixing with recovered carbonate in the air and sintering at high temperature, with high atom economy. The preparation method of the composite metal oxide is simple, low in cost and easy for large-scale production and application.

Description

technical field [0001] The invention belongs to the field of chemical preparation and synthesis, and in particular relates to a method for preparing potassium permanganate. Background technique [0002] Potassium permanganate KMnO 4 , is a common strong oxidant, purple-black granular or flaky crystal at room temperature, easy to decompose when exposed to light, widely used in chemical industry, medicine, mining, metal smelting and environmental protection and other fields. At present, potassium permanganate can be roughly divided into one-step method and two-step method according to the steps of the preparation process; the one-step method is that the raw material directly generates potassium permanganate through chemical reaction or electrolysis; the two-step method is that the raw material is obtained through a two-step process Two-step process for potassium permanganate production. The one-step method with more research and application mainly includes direct electrolysi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01G45/12
CPCC01G45/1214C01G45/1271C01P2006/80
Inventor 朱雪峰祝悦杨维慎
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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