Preparation method of white pure cerium oxide

A ceria, white technology, applied in chemical instruments and methods, inorganic chemistry, rare earth metal compounds, etc., can solve the problems of large environmental pollution, high energy consumption, high production cost, and achieve good dispersibility and high synthesis yield. , the effect of small particle size

Active Publication Date: 2019-06-25
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

This technology involves making pure or fine powders called yttrium cerumoxide (ceria) through chemical reactions that produce tiny particles known as YC2O3. These minute crystals are then mixed into an acidic solution containing salt solutions at certain temperature levels for specific time periods. By adjusting these variables like pressures, temperatures and volume ratios between them, this new type of product becomes more effective when applied on various materials without causing harmful side products during manufacturing processes. It's highly dispersed evenly throughout it, which makes its use less expensive than other methods while still providing excellent results over their original purpose.

Problems solved by technology

In current technology, different ways have been developed to produce special type chemical compounds called cerumoxides (cerium dioxy) through various processes such as burning ceritite rocks containing calcium carbons like zirconium), crushing them down from their original size, mixing other substances together, heat treatment, dry milling, and sintering techniques. While these procedures provide technical benefits over existing ones but they also involve expensive equipment and require significant time and resources. Therefore, research has focused towards finding new methods without requiring excessive effort or expenses.

Method used

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  • Preparation method of white pure cerium oxide

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Effect test

Embodiment 1

[0022] A kind of preparation method of white cerium oxide, concrete steps are as follows:

[0023] (1) According to the mass volume ratio g:mL of yellow ceria and deionized water is 1:1, add yellow ceria to deionized water to obtain mixed solution A;

[0024] (2) Ultrasound the mixed liquid A in step (1) for 20 minutes and then add it into the reactor to check the airtightness of the reactor. The hydrogen pressure is 1MPa. The specific operation of the air tightness inspection is to pass 8MPa air into the reactor, and put it into the water for 20 minutes after the air is passed through. If there are no obvious bubbles on the surface, it means that the airtightness of the reactor is good, otherwise the airtightness If the performance is not good, check for air leakage;

[0025] (3) Put the reactor in step (2) into a sand bath fluid at 400°C, react for 1 hour, filter and wash after the reaction is completed, wash with deionized water and absolute ethanol for 3 times, and then p...

Embodiment 2

[0028] A kind of preparation method of white cerium oxide, concrete steps are as follows:

[0029] (1) According to the mass volume ratio g:mL of yellow ceria to deionized water is 1:1.1, add yellow ceria to deionized water to obtain mixed solution A;

[0030] (2) Ultrasound the mixed solution A in step (1) for 25 minutes and then add it into the reactor to check the airtightness of the reactor. The hydrogen pressure is 2MPa. The specific operation of the air tightness inspection is to pass 8MPa air into the reactor, and put it into the water for 20 minutes after the air is passed through. If there are no obvious bubbles on the surface, it means that the reactor is well airtight, otherwise it is airtight. If the performance is not good, check for air leakage;

[0031] (3) Put the reactor in step (2) into a sand bath fluid at 420°C and react for 0.5h. After the reaction is completed, filter and wash. The washing is to wash 4 times with deionized water and absolute ethanol, and...

Embodiment 3

[0033] A kind of preparation method of white cerium oxide, concrete steps are as follows:

[0034] (1) According to the mass volume ratio g:mL of yellow ceria and deionized water is 1:1.5, add yellow ceria to deionized water to obtain mixed solution A;

[0035] (2) Ultrasound the mixed solution A in step (1) for 40 minutes and then add it into the reactor to check the airtightness of the reactor. The hydrogen pressure is 1.5MPa. The specific operation of the air tightness inspection is to pass 8MPa air into the reactor, and put it into the water for 20 minutes after passing the air. If there are no obvious bubbles on the surface, it means that the airtightness of the reactor is good, otherwise the gas If the tightness is not good, check for air leakage;

[0036] (3) Put the reactor in step (2) into a sand bath fluid at 450°C and react for 0.5h. After the reaction is completed, filter and wash. The washing is to rinse five times with deionized water and absolute ethanol, and t...

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Abstract

The invention discloses a preparation method of white pure cerium oxide. The preparation method comprises the following steps: adding yellow cerium oxide into deionized water to obtain a mixed solution a; ultrasonically treating the mixed solution a, adding the mixed solution an into a reactor, checking the gas tightness of the reactor, emptying the reactor with hydrogen after no gas leakage is checked, and introducing the hydrogen; and putting the reactor into a sand bath fluid with the temperature of 400-450 DEG C, reacting for 0.5-1 hour, filtering and washing after the reaction is finished, and then carrying out vacuum drying to obtain the white cerium dioxide; the white cerium dioxide is prepared by using the yellow cerium dioxide as a raw material by using the supercritical technology, the product is high in whiteness, small in particle size, and good in dispersibility, the preparation method is simple and feasible in process, free of any additive, green and environment-friendlyin the production process, and has no secondary pollution to the environment; and compared with a previous method, the preparation method has the advantages of low production cost and high synthesis yield.

Description

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Claims

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Application Information

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Owner KUNMING UNIV OF SCI & TECH
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