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A preparation method of carbon-doped magnesium hydroxide whisker-loaded rare earth metal defluoridation material

A technology of magnesium hydroxide and rare earth metals, applied in chemical instruments and methods, other chemical processes, water/sludge/sewage treatment, etc. The effect of improving stability and property stability

Active Publication Date: 2022-06-28
神美科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0012] The main purpose of the present invention is to provide a method for preparing a carbon-doped magnesium hydroxide whisker-loaded rare earth metal defluoridation material for the problem of poor effect on the existing fluorine removal materials

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] The coal-to-liquid residue was pulverized and then calcined at 1300 °C for 6 h under the protection of argon to obtain carbon materials. The commercially available basic magnesium sulfate whiskers and deionized water are mixed in an amount of 8:100 according to the mass ratio, and ultrasonicated for 20min at 40 ° C, and then the methanol solution that the concentration is 7mol / L (the addition amount is the same as the basic magnesium sulfate) is mixed. The mass ratio of magnesium sulfate whiskers is 8: 1) and polyvinyl alcohol (the amount added is 0.3: 1 with the mass ratio of basic magnesium sulfate whiskers) are mixed uniformly and placed in an autoclave, and at 100 ° C The reaction was carried out for 4 h, cooled to room temperature, and then the product was conventionally dispersed, washed, filtered and dried to obtain magnesium hydroxide whiskers. The carbon material, magnesium hydroxide whisker and dimethyl titanate obtained above were mixed uniformly in a mass ra...

Embodiment 2

[0034] The coal-to-liquid residue was pulverized and then calcined at 1500 °C for 4 h under the protection of argon to obtain carbon materials. The commercially available basic magnesium sulfate crystal whiskers and deionized water are mixed in an amount of 10:100 according to the mass ratio, and at 40 ° C, ultrasonic for 20min, then add the ethanol solution that the concentration is 7mol / L (the addition is the same as the basic The mass ratio of magnesium sulfate whiskers is 8: 1) and polyvinyl alcohol (the amount added is 0.3: 1 with the mass ratio of basic magnesium sulfate whiskers) are mixed uniformly and placed in an autoclave, and at 100 ° C The reaction was carried out for 4 h, cooled to room temperature, and then the product was conventionally dispersed, washed, filtered and dried to obtain magnesium hydroxide whiskers. The carbon material, magnesium hydroxide whisker and dimethyl titanate obtained above were mixed uniformly in a mass ratio of 1:3:0.3. First, the mixt...

Embodiment 3

[0037] The coal-to-liquid residue was pulverized and then calcined at 1500 °C for 4 h under the protection of argon to obtain carbon materials. Commercially available basic magnesium sulfate crystal whiskers and deionized water are mixed in an amount of 5:100 according to the mass ratio, and at 40 ° C, ultrasonic for 20min, then add the ethanol solution that the concentration is 7mol / L (addition is the same as the basic The mass ratio of magnesium sulfate whiskers is 8: 1) and polyvinyl alcohol (the amount added is 0.3: 1 with the mass ratio of basic magnesium sulfate whiskers) are mixed uniformly and placed in an autoclave, and at 100 ° C The reaction was carried out for 4 h, cooled to room temperature, and then the product was conventionally dispersed, washed, filtered and dried to obtain magnesium hydroxide whiskers. The carbon material, magnesium hydroxide whisker and dimethyl titanate obtained above were mixed uniformly in a mass ratio of 1:1:0.5. First, the mixture was h...

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Abstract

The invention discloses a preparation method of a carbon-doped magnesium hydroxide whisker-loaded rare earth metal defluoridation material, which comprises: pulverizing the coal oil residue and calcining at 1000-1500°C for 4-8 hours under the protection of an inert gas to obtain Carbon material; preparing magnesium hydroxide whiskers; mixing the carbon material obtained above, magnesium hydroxide whiskers and dimethyl titanate according to a mass ratio of 1: (1-3): (0.1-0.5), First, heat the mixture in a water bath at 40-80°C for 30 minutes, then calcinate at a high temperature of 400-800°C for 2-4 hours, then cool to room temperature, and then soak the product in a salt solution of 6-10mol / L rare earth metal for 4-6 hours. day, take it out, wash with deionized water 2 to 3 times, and dry to obtain the carbon-doped magnesium hydroxide whisker-loaded rare earth metal defluorination material. The fluorine removal material obtained by the method of the invention has a high fluoride removal rate, which can reach 99.99%, and the effect is obvious.

Description

technical field [0001] The invention belongs to the technical field of defluorination materials, in particular to a preparation method of a carbon-doped magnesium hydroxide whisker supported rare earth metal defluorination material. Background technique [0002] Fluorine is one of the most widely distributed elements on the earth's surface. It ranks 16th in the content of various elements that make up the earth's crust, accounting for 0.077% of the total crust. It is an inherent chemical substance in nature. Two-period, group VIIA, the element symbol is F, the atomic number is 9, the atomic weight is 19.0, and the electron configuration is 2S 2 2P 5 , the electronegativity is as high as 4.0, ranking first among all elements, the geochemical electricity price is -1, the covalent radius is 64pm, the ionic potential is -0.75, and the Ek value is 0.37(-1). It can be seen that fluorine is a non-metallic element with strong electronegativity and strong affinity for electrons. Am...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J20/20B01J20/04B01J20/30B01J20/32C02F1/28C02F101/14
CPCB01J20/20B01J20/041B01J20/3078B01J20/3085B01J20/3236C02F1/288C02F2101/14
Inventor 石伟杰冯春晖周继柱朱希坤王国瑞孙松厚张志平王洪禹
Owner 神美科技有限公司
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