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Aluminum oxide and preparation method and application thereof

A technology of alumina and aluminum alkoxide, which is applied in the fields of alumina/hydroxide preparation, chemical instruments and methods, and inorganic chemistry, and can solve problems such as low crystallinity and purity of alumina, inability to realize continuous production, and complicated preparation process , to achieve the effect of low production cost, easy operation and simple process

Active Publication Date: 2020-12-11
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

The preparation process in this document is relatively complicated, and the technical level of continuous production cannot be achieved
[0006] At present, the preparation of macroporous alumina is mainly batch-type, and the production efficiency is low.
And the crystallinity and purity of the prepared alumina are low

Method used

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  • 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

[0079] Add 100g of isopropanol, 10g of aluminum powder with a purity of 99.9% and 0.1g of aluminum chloride into the reactor, raise the reaction temperature to 95°C, and continue the reaction for 8 hours to obtain the required isopropanol and isopropanol by vacuum distillation aluminum.

[0080]Add 100g of pure water to a 15L reactor with stirring, start stirring and control the stirring rate to 100rad / min, then add the aluminum isopropoxide dropwise at a rate of 10g / min, raise the hydrolysis temperature to 80°C, and continue hydrolysis Reaction 5min; After the completion of the reaction, control the rate of addition of aluminum isopropoxide to 10g / min, and control the rate of addition of isopropanol-water mixed solution to 151g / min. In this isopropanol-water mixed solution, Virahol and water The mass ratio is 1:9, and the concentration of pseudo-boehmite in the control reactor is 0.14g / ml; the overflow port of the reactor is opened, and it is controlled to flow into the 10L a...

Embodiment 2

[0083] Add 500g of isopropanol, 100g of aluminum powder with a purity of 99.9% and 0.5g of aluminum chloride into the reactor, raise the reaction temperature to 95°C, and continue the reaction for 8 hours to obtain the required isopropanol and isopropanol by vacuum distillation aluminum.

[0084] Add 50g of pure water to a 10L reactor with stirring, start stirring and control the stirring rate to 300rad / min, then add the aluminum isopropoxide dropwise at a rate of 5g / min, increase the hydrolysis temperature to 100°C, and continue hydrolysis Reaction 10min; After the completion of the reaction, control the rate of addition of aluminum isopropoxide to 5g / min, control the rate of addition of isopropanol aqueous solution to 86g / min, and the mass ratio of isopropanol and water in this isopropanol aqueous solution is 1:1, control the concentration of pseudo-boehmite in the reactor to 0.23g / ml; open the overflow port of the reactor, and control it to flow into the 10L aging kettle at...

Embodiment 3

[0087] Add 200g of isopropanol, 40g of aluminum powder with a purity of 99.9% and 0.5g of aluminum chloride into the reactor, raise the reaction temperature to 95°C, and continue the reaction for 8 hours to obtain the required isopropanol and isopropanol by vacuum distillation aluminum.

[0088] Add 200g of pure water to a 20L reactor with stirring, start stirring and control the stirring rate to 300rad / min, then add the aluminum isopropoxide dropwise at a rate of 20g / min, raise the hydrolysis temperature to 85°C, and continue hydrolysis Reaction 15min; After the completion of the reaction, control the rate of addition of aluminum isopropoxide to 20g / min, control the rate of addition of isopropanol aqueous solution to 400g / min, and the mass ratio of isopropanol and water in this isopropanol aqueous solution is 9:1, control the concentration of pseudo-boehmite in the reactor to be 0.29g / ml; open the overflow of the reactor, and control it to flow into the 10L aging kettle at a ...

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Abstract

The invention provides aluminum oxide as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) reacting an aluminum source, alcohol and an initiator, and separating to obtain aluminum alkoxide; (2) adding the aluminum alkoxide obtained in the step (1) into water for hydrolysis to obtain pseudo-boehmite turbid liquid; and (3) adding an alcohol-water mixed solution and aluminum alkoxide into the pseudo-boehmite turbid liquid obtained in the step (2), keeping the concentration of the pseudo-boehmite turbid liquid unchanged, adding the pseudo-boehmite turbid liquid into an aging kettle for aging, and roasting an obtained aging product to obtain the aluminum oxide. The preparation method is simple in process, low in production cost and easy to operate, and the prepared aluminum oxide is high in crystallinity and purity, good in crystal form and controllable in structure.

Description

technical field [0001] The invention belongs to the field of metal oxide materials, and relates to aluminum oxide and its preparation method and application. Background technique [0002] At present, the preparation methods of pseudo-boehmite are divided into organic method and inorganic method. Among them, the organic method is mainly the aluminum alcohol hydrolysis method, which is a method of producing high-quality pseudo-boehmite from high-purity aluminum shavings and higher alcohols (n-pentanol, n-hexanol), and its production includes aluminum hydroxide , aluminum oxide, aluminum, aluminum alcohol and aluminum hydroxide cycle process. The pseudo-boehmite prepared by the method has high purity and crystallinity, good crystal form, easy control of pore structure and large specific surface area. However, the hydrolysis of aluminum alcohol to prepare macroporous alumina is mainly batch-type, and the production efficiency is low. [0003] CN 110395756 A discloses a method...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F7/44C01F7/42B01J21/04B01J35/10
CPCC01F7/441C01F7/42B01J21/04C01P2006/14C01P2006/16C01P2006/80B01J35/613B01J35/633B01J35/635B01J35/638B01J35/615
Inventor 杨超彭冲吕振辉
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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