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Fluorine gas purifying filler and preparation method and application thereof

A technology of fluorine gas and fluoride salt, which is applied in the field of fillers for purifying fluorine gas and its preparation, which can solve the problems of poor absorption effect and low porosity, and achieve good purification effect, large porosity and strong skeleton

Active Publication Date: 2017-11-10
洛阳森蓝化工材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to overcome the defects of low porosity and poor absorption effect of the filler for purifying fluorine gas in the prior art, and provide a new filler for purifying fluorine gas and its manufacturing method and application, so that the

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] Take 900g of sodium fluoride powder and 1100g of hydrofluoric acid solution with a concentration of 40%, mix them together, stir them evenly, place them for 4 hours for aging, and make Ф20 balls by rolling pellets. Dry it in the sun for 24 hours, place it in a high-temperature furnace, and bake it at 400°C for 6 hours. After cooling, the final product was determined to have a moisture content of 0.25%, an acid content of 0.48%, and an internal porosity of 49.8%. Put this product into a metal container, and heat it to 80°C, let 95% fluorine gas flow in, and the flow rate of fluorine gas is 0.75m / s. Detect the composition of the outlet gas, the concentration of fluorine gas reaches 99.5%, and the content of hydrogen fluoride is 0.5%.

Embodiment 2

[0019] Take 900g of sodium fluoride powder and 1000g of hydrofluoric acid solution with a concentration of 45%, mix them together, stir them evenly, place them for 4 hours for aging, and make Ф10 balls by rolling pellets. Dry it in the sun for 24 hours, place it in a high-temperature furnace, and bake it at 300°C for 12 hours. After cooling, the final product was determined to have a moisture content of 0.35%, an acid content of 0.65%, and an internal porosity of 49.2%. Put this product into a metal container, and heat it to 80°C, let 95% fluorine gas flow in, and the flow rate of fluorine gas is 0.75m / s. Detecting the composition of the outlet gas, the concentration of fluorine gas reaches 99.3%, and the content of hydrogen fluoride is 0.7%.

Embodiment 3

[0021] Take 1000g of calcium fluoride powder and 900g of hydrofluoric acid solution with a concentration of 50%, mix them together, stir them evenly, place them for 4 hours for aging, and make strip particles of Ф5 by extrusion. Dry it in the sun for 24 hours, place it in a high-temperature furnace, and bake it at 200°C for 24 hours. After cooling, the final product was determined to have a moisture content of 0.43%, an acid content of 1.55%, and an internal porosity of 42.7%. Put this product into a metal container, and feed 95% fluorine gas at room temperature, and the flow rate of fluorine gas is 0.75m / s. Detect the composition of the outlet gas, the concentration of fluorine gas reaches 99%, and the content of hydrogen fluoride is 1.0%.

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PUM

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Abstract

The invention relates to a fluorine gas purifying filler and a preparation method and application thereof, the filler is a fluoride salt filler, and the fluoride salt is a mixture of one or more of sodium fluoride, potassium fluoride, calcium fluoride, magnesium fluoride, lithium fluoride. The filler is prepared from the fluoride salt and hydrofluoric acid with a concentration of no less than 5% by mixing, reaction, curing, molding, air-drying and roasting, the internal porosity of the filler is 40%-60%, has the characteristics of large porosity and strong skeleton, and has the characteristics of strong adsorption and good purification effect when used in fluorine gas purification, and the preparation method of the fluorine gas purifying filler is simple and easy to implement.

Description

technical field [0001] The invention belongs to the field of fluorine chemical industry, and in particular relates to a filler for purifying fluorine gas, a preparation method and application thereof. Background technique [0002] Fluorine gas is one of the important materials in the field of modern fluorine chemical industry or fluorine chemistry, and it is more and more widely used in the fields of new energy and new materials. As the application fields of fluorine gas continue to expand, the requirements for the purity of fluorine gas are also getting higher and higher. Fluoride salt is one of the common fluorine gas purifiers, mainly used to remove hydrogen fluoride impurities in fluorine gas. Its biggest feature is that it does not bring in other impurities and does not react with fluorine gas. In addition, its raw materials are easy to obtain and low in cost, so it is the most common in the process of fluorine gas purification. [0003] Commercially available fluorid...

Claims

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Application Information

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IPC IPC(8): C01B7/20B01D53/81B01D53/68
Inventor 韩保国阎晓冬杨茂永崔武孝
Owner 洛阳森蓝化工材料科技有限公司
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