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Aluminum oxide and preparation method and application thereof

An alumina and peroxide technology, which is applied in the preparation of alumina/hydroxide, chemical instruments and methods, alumina/aluminum hydroxide, etc., can solve the problem of low specific surface area, small pore size and pore volume of synthetic alumina, etc. problem, to achieve the effect of complete crystal, low surface energy and simple process

Active Publication Date: 2020-08-04
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method synthesizes alumina with low specific surface area and small pore diameter and pore volume.

Method used

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  • Aluminum oxide and preparation method and application thereof
  • Aluminum oxide and preparation method and application thereof
  • Aluminum oxide and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0106] The present embodiment prepares alumina according to the following method:

[0107] (1) Add 100g of ethylene glycol, 10g of aluminum powder and 0.1g of aluminum chloride into the autoclave, turn on the stirrer and control the rotation speed to 500r / min, the reaction temperature is 95°C, and the reaction is carried out at a pressure of 1.5MPa for 1.5 hours, then Filter through a 1000-mesh filter at 95°C to obtain an aluminum alkoxide solution, in which about 210 g of aluminum ethylene glycol is obtained;

[0108] (2) Add the above-mentioned aluminum alkoxide solution into the autoclave, add 500g of ethylene glycol, raise the temperature to a reaction temperature of 95°C, then add 40g of deionized water into the autoclave, stir while adding it dropwise, and dissolve the deionized water in 15 minutes. After the water is added dropwise, vacuumize to evaporate all the water, age at 120°C for 12 hours, and finally filter and dry to obtain 80g of pseudoboehmite containing 75% ...

Embodiment 2

[0112] The present embodiment prepares alumina according to the following method:

[0113] (1) Add 250g of trimethylolpropane, 20g of aluminum powder and 1.0g of aluminum chloride into the autoclave, turn on the stirrer and control the rotation speed to 1000r / min, the reaction temperature is 100°C, and the reaction is carried out at a pressure of 2.0MPa for 2 hours. , and then filtered at 100°C with a 600-mesh filter to obtain an aluminum alcohol solution, in which about 498g of aluminum methylol propane;

[0114] (2) Add the above-mentioned aluminum alkoxide solution into the autoclave, add 700g of trimethylolpropane, heat up to the reaction temperature of 100°C, then add 100g of deionized water into the reaction kettle, stir while adding it dropwise, and put the After the addition of deionized water was completed, all the water was evaporated by vacuuming, aged at 150°C for 36 hours, and finally filtered and dried to obtain 200g of pseudoboehmite containing 80% trimethylolpr...

Embodiment 3

[0118] The present embodiment prepares alumina according to the following method:

[0119] (1) Add 200g of dipropylene glycol, 15g of aluminum powder and 1.5g of mercuric iodide into the autoclave, turn on the stirrer and control the rotating speed to be 1200r / min, the reaction temperature is 200°C, and the reaction is carried out under a pressure of 5.0MPa for 1 hour, Then, at 150° C., a 1200-mesh filter screen was used to filter to obtain an aluminum alcohol solution, wherein aluminum dipropylene glycol was 395 g;

[0120] (2) Add the above-mentioned aluminum alcohol solution into the autoclave, add 500g of dipropylene glycol, heat up to the reaction temperature of 95°C, then add 150g of deionized water into the reaction kettle, stir while adding it dropwise, and remove the deionized water in 60 minutes. After the ionic water was added dropwise, all the water was evaporated under vacuum, aged at 200°C for 24 hours, and finally filtered and dried to obtain 180g of pseudo-boeh...

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Abstract

The invention provides aluminum oxide as well as a preparation method and application thereof. The method comprises the following steps: 1) mixing polyhydric alcohol, an aluminum source and an initiator I, and reacting to obtain a polyhydric alcohol aluminum solution, 2) mixing polyol, the polyol aluminum solution and water to react, removing water, aging in alcohol, and carrying out solid-liquidseparation to obtain pseudo-boehmite containing polyol, and 3) mixing the pseudo-boehmite containing the polyhydric alcohol with an initiator II, a polymer monomer and water, heating to react, carrying out solid-liquid separation, and roasting the obtained solid to obtain the aluminum oxide. The preparation method provided by the invention is simple in process, low in production cost and easy to operate, and the prepared aluminum oxide has larger pore volume and pore diameter by adopting polyol.

Description

technical field [0001] The invention belongs to the field of metal oxide materials and relates to a preparation method of aluminum oxide. Background technique [0002] The traditional pseudo-boehmite production methods can be divided into organic aluminum alcohol method and inorganic aluminum method. The aluminum alcohol method mainly refers to a method developed by the German Condea company to produce high-quality pseudo-boehmite using high-purity aluminum shavings and higher alcohols (n-pentanol, n-hexanol) as raw materials. Its production includes aluminum hydroxide, oxidation Cycling process for aluminium, aluminium, aluminum alkoxide and aluminum hydroxide. The company's product SB powder has high purity, good crystal form, easy control of pore structure and large specific surface area. This method has become the main method for producing alumina supports abroad, and is widely used as various catalyst supports or binders. Brunsbuttle and American Ke Charles set up fac...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01F7/44B01J21/04B01J32/00
CPCB01J21/04C01F7/021C01F7/025C01F7/30C01F7/441C01P2004/61C01P2006/12C01P2006/14C01P2006/16C01P2006/17
Inventor 彭冲吕振辉杨超
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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