Preparation method of adsorbent for fluorine gas purification

An adsorbent, fluorine gas technology, applied in the field of electrolytic fluorine production, can solve the problems of low porosity, poor adsorption capacity, poor mechanical and use stability, etc., and achieve the effect of large porosity, strong adsorption capacity, and good use stability.

Pending Publication Date: 2022-02-18
天津海嘉斯迪新材料合伙企业(有限合伙)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] One aspect of the present invention is to provide a method for preparing an adsorbent for purifying fluorine gas, aiming at the defects of poor adsorption capacity, low porosity, and poor mechanical and service stability existing in the adsorbent for purifying fluorine gas in the prior art

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] Add 50kg of pure water to the mixing tank, gradually add 50kg of sodium fluoride under stirring, add 5kg of sodium silicate (SCS) after stirring evenly, control the stirring speed at 60rpm, and mix the materials evenly after stirring for 1 hour. Turn on the vacuum system of the mixing kettle, and gradually heat up the temperature. After removing 30kg of water at 60-100°C and -0.060--0.085MPa, the viscosity of the material reaches 7000cP, stop heating and turn off the vacuum system. Control the temperature at 80-100° C. and transfer the material to a granulator, and obtain a spherical molded body with a diameter of 10 mm through granulation.

[0037] Put the formed adsorbent in a tray and put it into a muffle furnace for sintering. The sintering process is automatically completed by the temperature control program of the muffle furnace. The temperature control program is set as follows: first, slowly increase the temperature of the muffle furnace to 150°C and keep the te...

Embodiment 2

[0040] Add 30kg of pure water to the mixing tank, gradually add 70kg of sodium fluoride under stirring, add 5kg of high molecular weight sodium carboxymethylcellulose (CMC) after stirring evenly, control the stirring speed at 60rpm, and mix the materials after stirring for 1 hour uniform. Turn on the vacuum system of the mixing kettle, and gradually heat up the temperature. After removing 25kg of water at 60-100°C and -0.060--0.085MPa, the viscosity of the material reaches 8000cP, stop heating and turn off the vacuum system. Control the temperature at 80-100° C. and transfer the material to a granulator, and obtain a spherical molded body with a diameter of 10 mm through granulation.

[0041] Put the formed adsorbent in a tray and put it into a muffle furnace for sintering. The sintering process is automatically completed by the temperature control program of the muffle furnace. The temperature control program is set as follows: first, slowly increase the temperature of the mu...

Embodiment 3

[0044] Add 40kg of pure water to the mixing tank, gradually add 60kg of sodium fluoride under stirring, add 3kg of 2-acrylamido-2-methylpropanesulfonate sodium (AMPS-Na) after stirring evenly, and control the stirring speed at 60rpm, after stirring for 1 hour, the materials are mixed evenly. Turn on the vacuum system of the mixing kettle, and gradually heat up the temperature. After removing 30kg of water at 60-100°C and -0.060-0.085MPa, the viscosity of the material reaches 6000cP, stop heating and close the vacuum system. Control the temperature at 80-100° C. and transfer the material to a granulator, and granulate to obtain a columnar molded body with a diameter of 20 mm and a length of 10 mm.

[0045] Put the formed adsorbent in a tray and put it into a muffle furnace for sintering. The sintering process is automatically completed by the temperature control program of the muffle furnace. The temperature control program is set as follows: first, slowly increase the temperat...

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Abstract

The invention discloses a preparation method of an adsorbent for fluorine gas purification. The method comprises the following steps: proportionally mixing a fluoride salt raw material with a binder and a solvent, and performing concentrating, granulating, sintering and post-treatment to obtain the adsorbent for fluorine gas purification. The post-treatment method comprises the following steps: mixing a product obtained after sintering with fluorine gas or fluorine-nitrogen mixed gas with the volume fraction of 5%-10%, standing and reacting, wherein the use amount of the fluorine gas with the volume fraction of 5%-10% is 0.5-1.0 wt% of the adsorbent. The adsorbent for fluorine gas purification prepared by the method is large in porosity, strong in adsorption capacity, remarkably improved in mechanical property and good in use stability, can improve the fluorine gas purification efficiency in the fluorine preparation process, and has good practicability and wide utilization value. The preparation method disclosed by the invention is simple in process, universal in equipment, low in corrosivity and easy to realize automatic control. The raw materials used in the preparation method are commercially available products, and are low in price and easy to obtain.

Description

technical field [0001] The invention relates to the technical field of electrolytic fluorine production, in particular to a preparation method of an adsorbent for purifying fluorine gas. Background technique [0002] Fluorine is a non-metallic element with the strongest electronegativity and the most active chemical properties, and can interact with almost all elements. High-purity fluorine gas (F 2 ) is a very active gas with strong oxidizing properties and can react with most inorganic or organic substances at room temperature or below room temperature, releasing a large amount of heat, which often leads to combustion and explosion. High-purity fluorine gas is an important raw material in the field of fine chemicals, widely used in electronics, laser technology, scientific research, medical plastics and other fields; due to its strong oxidizing properties, it can be used for glass etching, surface passivation treatment of metal materials, and pipelines , used in national...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J20/30B01J20/04B01J20/28B01J20/34B01D53/02
CPCB01J20/3042B01J20/046B01J20/28011B01J20/3483B01J20/28019B01D53/02B01D2259/40088
Inventor 王兆敏
Owner 天津海嘉斯迪新材料合伙企业(有限合伙)
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