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Preparation of high-purity aluminum alkoxide and aluminum oxide powder from aluminium (alloy) scrap

A waste aluminum alloy and aluminum alkoxide technology, which is applied in the fields of aluminum oxide/hydroxide, organic chemistry, addition of unsaturated hydrocarbons and saturated hydrocarbons, etc., to achieve the effect of simple equipment and mild production process conditions

Inactive Publication Date: 2012-10-24
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem solved by the present invention is to provide a method for solving the recycling defects of existing waste aluminum alloy products by using chemical means through a completely different idea

Method used

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  • Preparation of high-purity aluminum alkoxide and aluminum oxide powder from aluminium (alloy) scrap
  • Preparation of high-purity aluminum alkoxide and aluminum oxide powder from aluminium (alloy) scrap
  • Preparation of high-purity aluminum alkoxide and aluminum oxide powder from aluminium (alloy) scrap

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] The first step: weigh anhydrous aluminum chloride (AlCl 3 ) 2 grams, added to 500 ml of isopropanol Put it in a heatable container (generally made of glass or stainless steel) and stir it, then add waste aluminum alloy flakes or chips - containing 2 moles or 54 grams of aluminum, put it into the reflux device to heat and reflux, and the reaction starts. As shown in the following chemical reaction equation:

[0041]

[0042] After refluxing for 20-50 hours, the evolution of hydrogen stops, indicating that the synthesis reaction is complete. If the alloying element Mg is present, the following reactions will be accompanied at the same time:

[0043]

[0044] The second step: after the alkoxide obtained in the first step is cooled, alkoxide crystals are precipitated, the residue sinks, and the clear saturated solution of alkoxide is located at the uppermost layer. Pour the clear liquid into another clean container, add 500 ml of isopropanol to the original contai...

Embodiment 2

[0048] The first step: weigh anhydrous aluminum chloride (AlCl 3 ) 2 grams, added to a heatable container (generally made of glass or stainless steel) containing 500 milliliters of isobutanol and stirred, then added scrap aluminum alloy pieces or chips - containing 2 moles or 54 grams of aluminum, put The reflux device is heated to reflux, and the reaction begins. As shown in the following chemical reaction equation:

[0049]

[0050] After refluxing for 10 to 30 hours, the evolution of hydrogen stops, indicating that the synthesis reaction is complete. If the alloying element Mg is present, the following reactions will be accompanied at the same time:

[0051]

[0052] The second step: after the alkoxide obtained in the first step is cooled, alkoxide crystals are precipitated, the residue sinks, and the clear saturated solution of alkoxide is located at the uppermost layer. Pour the clear liquid into another clean container, add 500 ml of isobutanol to the original c...

Embodiment 3

[0057] The first step: weigh anhydrous aluminum chloride (AlCl 3 ) 2 grams, added to a heatable container (generally glass or stainless steel) containing 500 ml of n-butanol and stirred, then added scrap aluminum (alloy) pieces or chips - containing 2 moles of aluminum or 54 grams, Put into the reflux device and heat to reflux, and the reaction starts. As shown in the following chemical reaction equation:

[0058]

[0059] After reflux for 4 to 10 hours, the evolution of hydrogen stops, indicating that the synthesis reaction is complete. If the alloying element Mg is present, the following reactions will be accompanied at the same time:

[0060]

[0061] The second step: after the alkoxide obtained in the first step is cooled, alkoxide crystals are precipitated, the residue sinks, and the clear saturated solution of alkoxide is located at the uppermost layer. Pour the clear liquid into another clean container, add 500 ml of n-butanol to the original container, heat to...

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Abstract

The invention provides a preparation method of high-purity aluminum alkoxide and aluminum oxide powder from aluminium (alloy) scrap. The method comprises the steps of: reacting waste or used aluminum alloy scrap products with fatty alcohol with a carbon atomic number of 2-4 or higher alcohol under catalysis of AlCl3, wherein a reaction temperature is equal to or higher than that of the employed alcohol; and after the reaction, carrying out recrystallization and vacuum distillation to obtain high-purity aluminum alkoxide. The invention provides a method, which has a completely different idea, and utilizes chemical means to solve defects in the existing recycling of aluminum alloy scrap products.

Description

technical field [0001] The invention belongs to the new technology of waste utilization, synthesis and preparation of inorganic materials, specifically the preparation of high-purity aluminum alkoxide, magnesium-aluminum bimetallic alkoxide, alumina, and magnesium-aluminum spinel powder from waste aluminum (alloy) products Technology. Background technique [0002] As a class of materials with excellent performance, aluminum alloy has developed extremely rapidly in recent decades, and its products have made great contributions to human progress. With the gradual depletion of natural resources and the appearance of a large number of waste aluminum alloy products, it has brought a lot of confusion to human beings. [0003] As for the aluminum in industrial waste, at present, without exception, people use various technologies to recycle it through the steps of pretreatment and smelting, and it still belongs to the metal state in form. There are three deficiencies in this way: ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C07C31/32C07C2/70C01F7/02
CPCY02P20/129
Inventor 王修慧杨金龙
Owner TSINGHUA UNIV
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