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Method for preparing potassium superoxide powder through metallic potassium spray-oxidizing process

A technology of potassium superoxide and oxidation method, applied in the direction of alkali metal oxides, etc., can solve the problems of low purity and high risk of potassium superoxide powder

Inactive Publication Date: 2018-04-06
北京恒信化工有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The conventional method of preparing potassium superoxide uses potassium hydroxide and hydrogen peroxide as raw materials, but the purity of potassium superoxide powder prepared by this method is low, the available oxygen is about 25%, and it is extremely dangerous. This method has been eliminated

Method used

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  • Method for preparing potassium superoxide powder through metallic potassium spray-oxidizing process
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  • Method for preparing potassium superoxide powder through metallic potassium spray-oxidizing process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Embodiment one: a kind of equipment that metal potassium oxidation method prepares potassium superoxide powder, combines figure 1 and figure 2 , including a molten potassium tank 1, a reactor 2 connected to the molten potassium tank 1, and a collector 3, a dust removal tank 4 and a dust reduction chamber 5 connected to the reactor 2 in sequence.

[0028] A heating wire (not shown) is wound around the outside of the molten potassium tank 1, and the outer side of the heating wire is wrapped with an insulating cover 11, so as to avoid heat loss too fast. The solid potassium is put into the molten potassium tank 1, and when the electric heating wire is heated to a temperature of 80° C., the solid potassium is melted to form liquid potassium after being heated by the electric heating wire.

[0029] A spray gun 21 is fixed at the feed port of the reactor 2, and the spray gun 21 includes an outer chamber 211 and an inner chamber 212 coaxially arranged, and one end of the out...

Embodiment 2

[0034] Embodiment two: a kind of method that metal potassium spray oxidation method prepares potassium superoxide powder, adopt the equipment of embodiment one, process according to the following steps:

[0035] Select solid potassium with a purity of 98.5%, put solid potassium into molten potassium tank 1, and heat to 80° C. to melt to form liquid potassium.

[0036] The water content of the compressed air is less than 0.5%, the pressure of the compressed air is adjusted to 0.3MPa, and the flow velocity of the compressed air is adjusted to 6 m / s, and the flow velocity of the liquid potassium is 0.3 m / s. Adjust the temperature of the spray gun 21 to 260°C, and at this time, the negative pressure formed at the muzzle of the spray gun 21 is -0.025MPa.

[0037] In this process, liquid potassium is rapidly oxidized by air to form potassium superoxide powder, and the particle size of potassium superoxide powder is between 8-12 mesh.

Embodiment 3

[0038] Embodiment 3: A method for preparing potassium superoxide powder by metal potassium spray oxidation method. Compared with Embodiment 1, the equipment used is different in that the diameter of the inner chamber 212 close to the muzzle 213 is 1.3 mm. Specific steps are as follows:

[0039] Select solid potassium with a purity of 98.8%, put solid potassium into molten potassium tank 1, and heat to 90° C. to melt to form liquid potassium.

[0040] The moisture content of compressed air is less than 0.5%. The pressure of the compressed air is adjusted to 0.5 MPa, and the flow velocity of the compressed air is adjusted to be 8 m / s, and the flow velocity of the liquid potassium is 0.5 m / s. Adjust the temperature of the spray gun 21 to 280° C. At this time, the negative pressure formed at the muzzle 213 of the spray gun 21 is -0.035 MPa.

[0041] In this process, liquid potassium is rapidly oxidized by air to form potassium superoxide powder, and the particle size of potassiu...

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Abstract

The invention relates to a method for preparing potassium superoxide powder through a metallic potassium spray-oxidizing process. The method comprises the following steps that liquid potassium and compressed air are atomized through an internally and externally embedded spray gun, and the potassium superoxide powder is prepared, wherein the spray gun comprises an external cavity body and an internal cavity body, the external cavity body is used for flowing the compressed air, and the internal cavity body is used for flowing the liquid potassium. The flow velocity of the compressed air is 6-8 meters / second, and the flow velocity of the liquid potassium is 0.3-0.5 meter / second; the reaction temperature of the liquid potassium and the compressed air is 260-300 DEG C. In the potassium superoxide powder prepared by using the method, the oxygen content is higher than 31%, and the volume density can reach 0.565 g / cm<3>. The potassium superoxide powder prepared by using the method can be usedfor producing a 65-potassium regenerator and an oxygen generation agent in an isolated type self-rescuer.

Description

technical field [0001] The invention relates to the field of preparation of potassium superoxide powder, in particular to a method for preparing potassium superoxide powder by metal potassium spray oxidation. Background technique [0002] At present, in fields such as aerospace industry and submarine technology, the human body is required to carry out physiological activities for a long time in a confined space. In order to save space and cost, it is usually necessary to place an oxygen regeneration device in the cabin. Potassium superoxide can be placed in the oxygen regeneration device as an oxygen supply agent. During this process, potassium superoxide reacts with carbon dioxide gas and water vapor exhaled by the human body to generate oxygen for normal physiological activities of the human body. [0003] The conventional method for preparing potassium superoxide uses potassium hydroxide and hydrogen peroxide as raw materials, but the potassium superoxide powder prepared...

Claims

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Application Information

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IPC IPC(8): C01D1/02
CPCC01D1/02
Inventor 张京广郭中立李洪斌黄建福王文龙牛钢
Owner 北京恒信化工有限公司
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