微反应器水热法耦合制备纳米片状氧化铝

doi:10.11962/1006-4990.2020-0232

Abstract

Abstract:

A novel preparation process of nano-flaky alumina is proposed by using a high-throughput impingingstream microreactor with sodium metaaluminate and aluminum sulfate as raw materials,which efficiently integrates the mi-cro-reaction method with aging and hydrothermal method.The effect of different coupling methods on the physical properties of the product such as crystal shape,morphology and pore structure was studied by XRD,SEM,TEM,BET,TG-DTG and oth-er test methods.The flaky γ-AlOOH with purity of more than 99.7%,particle size of 30~100 nm and thickness of 2~5 nm can be produced by microreaction-hydrothermal coupling technology.The γ-Al₂O₃ with the same morphology can be obtained after calcination at 550 ℃ for 4 h.The morphology and mesoporous structure of alumina powder can be regulated by the coupling of different processes.It provides theoretical support for the industrial production of nano-flaky alumina.

Key words: high-throughput, microreaction, hydrothermal, nano-flaky alumina

CLC Number:

TQ131.1

Wang Mengdi,Luo Jin,Zhou Jinghui,Yu Haibin,Wu Wei,Li Xiaoyun. Microreactor-hydrothermal coupling preparation of nano-flaky alumina[J]. Inorganic Chemicals Industry, 2021, 53(3): 87-92.

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References 21

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制备方法	比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	孔径/ nm
水热法	160.00	0.50	12.54
微反应-水热法耦合	87.97	0.48	22.09
微反应-老化-水热法耦合	108.95	0.52	19.21
微反应法	110.00	0.11	4.05
微反应-老化法耦合	164.00	0.14	3.51

制备方法	比表面积/ （m²·g^-1）	孔容/ （cm³·g^-1）	孔径/ nm
水热法	212.54	0.63	11.85
微反应-水热法耦合	105.23	0.62	23.40
微反应-老化-水热法耦合	126.78	0.65	20.36

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Inorganic Acid-Base-Salt Committee of CIESC

Microreactor-hydrothermal coupling preparation of nano-flaky alumina

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