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Production method of high-purity pseudo-boehmite, and produced high-purity pseudo-boehmite

A pseudo-boehmite, production method technology, applied in the production of hydrogen, chemical instruments and methods, aluminum compounds, etc., can solve the problems of difficulty in recycling, complex preparation process of pseudo-boehmite, and high cost

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

In the preparation process of AlOOH microspheres in this method, gallium, indium, and tin were not effectively recovered and mixed into the product, which not only caused high product cost, but also contained a large amount of impurities in the product
The above-mentioned similar studies all have problems such as high cost, large amount of low-melting point alloys, difficulty in recycling, and complicated preparation process of pseudo-boehmite, so it is difficult to industrialize

Method used

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  • Production method of high-purity pseudo-boehmite, and produced high-purity pseudo-boehmite
  • Production method of high-purity pseudo-boehmite, and produced high-purity pseudo-boehmite
  • Production method of high-purity pseudo-boehmite, and produced high-purity pseudo-boehmite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Weigh 400g of a metal aluminum ingot with an aluminum content of 99.9wt%, and also weigh 0.04g of metal gallium and indium (including 0.0316g of gallium and 0.0084g of indium), and place them in a stirred intermediate frequency vacuum melting furnace at a vacuum of 1.0~ 1.0×10 -1 Under the conditions of Pa, smelt at 800℃ for 30min, stirring continuously during the stirring speed at 300 rpm, and then pouring into a mold, and after natural cooling, the aluminum ingot is obtained. The aluminum ingot is cut and refined into particles of 0.2-0.8 cm. The mass ratio of aluminum gallium indium in the aluminum ingot is: 100:0.0079:0.0021, and gallium indium accounts for 0.01wt% of the total metal mass; add 8L of pure water into the pressurized reactor, heat to 95°C, add aluminum particles while stirring, and continue Heating makes the water boil; as the reaction between aluminum and water progresses, the gas pressure in the reactor rises, the gas is led out of the supercooled hydr...

Embodiment 2

[0033] Weigh 400g of a metal aluminum ingot with an aluminum content of 99.9wt%, 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 at a vacuum of 1.0~ 1.0×10 -1 Under the condition of Pa, smelt at 800℃ for 30min, stirring continuously during the process, the stirring speed is 300 rpm, and then poured into the mold, after natural cooling, the aluminum ingot is obtained. The aluminum ingot is cut and refined into 0.5-1cm particles. The mass ratio of aluminum, gallium and indium in the ingot is: 100:0.079:0.021, and gallium and indium account for 0.1wt% of the total metal mass; add 8L of pure water into the pressurized reactor, heat to 95°C, add aluminum particles while stirring, and continue heating 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,...

Embodiment 3

[0036] Weigh 400g of a metal aluminum ingot with an aluminum content of 99.9wt%, 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 smelting furnace at 1.1×10 5 Under the condition of Pa, smelt at 800℃ for 30min, stirring continuously during the process, the stirring speed is 300 rpm, and then poured into the mold, after natural cooling, the aluminum ingot is obtained. The aluminum ingot is cut and refined into 0.2-1cm particles. The mass ratio of aluminum gallium indium in the ingot is: 100:0.158:0.042, and gallium indium accounts for 0.2wt% of the total metal mass; add 8L of pure water into the pressurized reactor, heat to 95°C, add aluminum particles while stirring, and continue heating Make the water boil; 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 hydrog...

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Abstract

The invention discloses a production method of high-purity pseudo-boehmite. The production method comprises the following steps: a, weighing metal aluminum, subjecting the metal aluminum to smelting with a metal catalyst, and reacting the obtained alloy aluminum with water to prepare hydrogen, wherein the purity of the metal aluminum is not less than 99.9 wt%; b, separating slurry obtained after the reaction of the aluminum with water, drying the separated suspended slurry to obtain pseudo-boehmite, and optionally calcining the pseudo-boehmite to obtain aluminum oxide; c, treating aluminum-water reaction residues after slurry separation so as to recycle the aluminum-water reaction residues. The invention further discloses the obtained pseudo-boehmite. The method is simple in process and short in flow, and hydrogen preparation conditions are easy to realize; the catalysts gallium and indium in the alloy are low in consumption, so raw material cost is low, and recycling is easy to realize; and according to the invention, safety, environmental protection, low cost and high efficiency of hydrogen production can be realized, a high-added-value pseudo-boehmite product can be obtained, and remarkable economic benefits are obtained.

Description

Technical field [0001] The invention relates to a preparation process of high-purity pseudo-boehmite, which is realized through the hydrolysis reaction of high-purity aluminum and produces hydrogen as a by-product. Background technique [0002] Pseudo-boehmite (γ-AlOOH·nH 2 O, n=0.08~0.62) is also called colloidal boehmite or pseudoboehmite. Its crystal phase structure is similar to boehmite, but the crystallization is incomplete. Pseudo-boehmite has the characteristics of large pore volume, high specific surface area, and good peptization properties. It can be widely used in the petrochemical industry as a catalyst carrier, catalyst, ceramic base material, etc., and is also used in the preparation of γ-Al. 2 O 3 It is an important precursor of aluminum oxide and its series of products. Pseudo-boehmite as a catalyst carrier generally needs to have large pore volume, large specific surface area, low sodium content and appropriate pore size distribution. [0003] At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/42C01B3/08
CPCC01F7/428C01B3/08C01P2006/12C01P2006/14C01P2006/16C01P2006/80Y02E60/36
Inventor 魏际伦魏存弟蒋引珊
Owner 吉林省氢汇新能源有限公司
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