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Production method of high-purity aluminum oxide and produced high-purity aluminum oxide

A high-purity alumina, production method technology, applied in alumina/hydroxide preparation, hydrogen production, chemical instruments and methods, etc., can solve the problems of high cost, serious equipment corrosion, difficult industrialization, etc.

Pending Publication Date: 2020-10-23
吉林省氢汇新能源有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

New high-purity alumina preparation methods emerge in endlessly, but most of them have complex processes, serious corrosion of equipment, or high costs, making it difficult to industrialize

Method used

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  • Production method of high-purity aluminum oxide and produced high-purity aluminum oxide
  • Production method of high-purity aluminum oxide and produced high-purity aluminum oxide
  • Production method of high-purity aluminum oxide and produced high-purity aluminum oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Weigh 400g of 4N metal aluminum ingot with an aluminum content of 99.99wt%, and also weigh 0.04g of gallium and indium (including 0.0316g of gallium and 0.0084g of indium), and place them in a stirred medium frequency vacuum melting furnace. 1.0~1.0×10 -1 Under the condition of Pa, smelt at 800℃ for 30min, stir continuously during the smelting, the stirring speed is 300 rpm, and then cast into the mold, after natural cooling, the aluminum ingot is obtained, and the aluminum ingot is cut and refined into particles below 1 cm. The mass ratio of aluminum gallium indium is: 100:0.0079:0.0021, gallium indium accounts for 0.01wt% of the total metal mass; add 8L of pure water into the pressurized reactor, heat it to 95°C, add aluminum particles while stirring, continue heating to make water Boiling; as the reaction between aluminum and water progresses, the gas pressure in the reactor rises, the gas is led out of the supercooled hydrazine, the water is separated, and the hydroge...

Embodiment 2

[0036] Weigh 400g of 5N metal aluminum ingot with an aluminum content of 99.999wt%, and also weigh 0.8g of metal gallium and indium (including 0.632g of gallium and 0.168g of indium), and place them in a stirred argon-protected melting furnace. ×10 5 Under the condition of Pa, smelt at 800°C for 30 minutes, stirring at a stirring speed of 300 revolutions / min, and then pouring into a mold. The aluminum ingot is cut and refined into particles below 1 cm. The mass ratio of aluminum gallium indium in the aluminum ingot is: 100:0.158:0.042, gallium and indium accounted for 0.2wt% of the total metal mass; add 8L of pure water into the pressurized reactor, heat it to 95℃, add aluminum particles while stirring, and continue heating to make the water boil; as the aluminum and water As the reaction progresses, the gas pressure in the reactor rises, the gas is led out of the supercooled hydrazine, the water is separated and removed, and the hydrogen is collected; after the aluminum-water r...

Embodiment 3

[0038] Weigh 400g of 5N metal aluminum ingot with an aluminum content of 99.999wt%, and also weigh 0.40g of gallium and indium (including 0.316g of gallium and 0.084g of indium), and place them in a stirred intermediate frequency vacuum melting furnace. Under the condition of 1.0~1.0×10-1Pa, smelt at 800℃ for 30min, and stir continuously during the stirring at 300 rpm. Then, it is poured into a mold, and the aluminum ingot is cut and refined into particles below 1 cm. The aluminum ingot contains aluminum The mass ratio of gallium to indium is: 100:0.079:0.021, and gallium indium accounts for 0.1wt% of the total metal mass; add 8L of pure water into the pressurized reactor, heat to 95℃, add aluminum particles while stirring, continue heating to make the water boil ; As the reaction between aluminum and water progresses, the gas pressure in the reactor increases, the gas is led out of the supercooled hydrazine, the water is separated, and the hydrogen is collected; the aluminum-wa...

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Abstract

The invention discloses a production method of high-purity aluminum oxide. The production method comprises the following steps: a, weighing metal aluminum, subjecting the metal aluminum to smelting with a metal catalyst, and reacting obtained alloy aluminum with water to prepare hydrogen; b, separating slurry after the reaction of the aluminum with water, and drying the separated suspended slurryto obtain pseudo-boehmite; c, roasting the pseudo-boehmite powder to obtain aluminum oxide powder; d, distilling the aluminum oxide powder to remove included metal catalyst components so as to obtainhigh-purity alpha-aluminum oxide powder. The invention further discloses a prepared high-purity aluminum oxide product. The method is simple in process and short in flow, a hydrogen byproduct is obtained while high-purity aluminum oxide is prepared, and economic benefits are remarkable; the alloy used as the raw material is low in gallium and indium consumption, low in cost and easy to recycle; and the prepared high-purity aluminum oxide is low in impurity content, high in additional value, free of pollution and equipment corrosion in the preparation process and easy to apply and popularize.

Description

Technical field [0001] The present invention belongs to the technical field of alumina preparation. Specifically, the present invention relates to a method for preparing an aluminum hydrolysate by reacting high-purity metallic aluminum with pure water, and further processing to obtain high-purity alumina powder, and the obtained high-purity Alumina. Background technique [0002] High purity alumina refers to Al 2 O 3 Alumina powder with a content of ≥99.99%, in addition to excellent characteristics such as high temperature resistance, chemical corrosion resistance, rapid cooling and heat resistance, and resistance to explosion, can also be widely used in LED artificial sapphire crystals, PDP phosphors, high-pressure sodium lamps, and luminescence. Materials, special ceramics, functional coatings, three primary colors, catalyst carriers, biological materials and other fields will be one of the high-end products with large output, high output value and wide range of applications in...

Claims

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Application Information

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IPC IPC(8): C01F7/42C01B3/08
CPCC01F7/42C01B3/10C01P2002/72C01P2004/03C01P2006/80Y02E60/36
Inventor 魏际伦魏存弟徐少南
Owner 吉林省氢汇新能源有限公司
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