Citation: Shi Chunyang, Xie Gang, Wang Ying, Yu Xiaohua. Preparation of Ultrafine Flaky α-Al₂O₃ by Modified Bayer Process[J]. Chemistry, ;2019, 82(12): 1098-1103. shu

Preparation of Ultrafine Flaky α-Al₂O₃ by Modified Bayer Process

Shi Chunyang ¹ ,
Xie Gang ^1,2 ,
Wang Ying ³ ,
Yu Xiaohua ^1,,

1.
Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093
2.
State Key Laboratory of Common Associated Non-Ferrous Metal Resources Pressure Hydrometallurgy Technology, Kunming 650503
3.
Guiyang Aluminum Magnesium Design & Research Institute Co., Ltd., Guiyang 550081

Corresponding author: Yu Xiaohua, yxhyxh1978@aliyun.com
Received Date: 6 July 2019
Accepted Date: 6 August 2019

Figures(6)

In order to optimize the metallurgical grade alumina production process, the modified Bayer process is used to produce more profitable flake α-Al₂O₃. The flaky α-Al₂O₃ was prepared by degumming sodium aluminate solution, strengthening the carbon concentration of spherical seed crystals, deep dehydrogenation under hydrothermal conditions and calcination under AlF₃ conditions. The composition, phase and morphology of the product were analyzed by XRF, XRD and SEM. The results showed that when the addition of industrial aluminum hydroxide, calcium oxide and sodium oxalate are 45 g/L, 10 g/L and 10 g/L respectively, impurity iron, silicon, magnesium, zinc and calcium are reduced to (1.5, 5.0, 1.8, 1.5, 5.2)×10^-5, respectively. Adding a small amount of spherical seed crystals in the carbonization, the decomposition rate of the solution reaches 92% or more, and the product particle size is reduced and evenly distributed. Lowering the pH in dehydrogenation during hydrothermal deepening can promote the conversion of gibbsite to boehmite more thoroughly. When 2% AlF₃ seed crystals were added, the washed hydrothermal product was calcined at 850℃ for 4 h, the ultrafine flaky α-Al₂O₃ with a purity of more than 99.96% and a regular morphology can be obtained.
- Modified bayer method,
- Deeply reducing impurity,
- Enhanced carbon,
- Hydrothermal sodium removal,
- Flaky α-Al₂O₃
1. [1]
2. [2]
3. [3]
4. [4]
  P Karlsson, A E C Palmqvist, K Holmberg. Adv. Colloid Interf. Sci., 2006, (128-130):121~134.
5. [5]
6. [6]
  T W Kwon, H J Seo, S Jang et al. J. Nanosci. Nanotechnol., 2015, 15(2): 1636~1646.
7. [7]
8. [8]
9. [9]
10. [10]
11. [11]
12. [12]
13. [13]
14. [14]
  S Shen, W K Ng, L S O Chia et al. Crystal Growth Design, 2012, 12(10): 4987~4994.
15. [15]
16. [16]
17. [17]
  G F Fu, J Wang, J Kang. Transac. Nonferr. Metal. Soc. Chin., 2008, 18(3): 743~748..
18. [18]
  Y S Wu, P Xu, L S Li. Adv. Powder Technol., 2016, 27(1): 124~129.
19. [19]
20. [20]
21. [21]
22. [22]
23. [23]
24. [24]
  J Zeng, Z Yin, Q Chen. Hydrometallurgy, 2007, 89(1~2): 107~116.
1. [1]
  Liuyun Chen , Wenju Wang , Tairong Lu , Xuan Luo , Xinling Xie , Kelin Huang , Shanli Qin , Tongming Su , Zuzeng Qin , Hongbing Ji . Soft template-induced deep pore structure of Cu/Al₂O₃ for promoting plasma-catalyzed CO₂ hydrogenation to DME. Acta Physico-Chimica Sinica, 2025, 41(6): 100054-0. doi: 10.1016/j.actphy.2025.100054
2. [2]
  Zhiquan YIN , Wenlong ZHEN , Xiaofeng NING , Zhengzhi HAN , Gongxuan LÜ . Mechanism of Al₂O₃ layer in enhancing the stability and activity of GaN for photocatalytic overall water splitting. Chinese Journal of Inorganic Chemistry, 2026, 42(7): 1523-1533. doi: 10.11862/CJIC.20260038
3. [3]
  Xiaorui Chen , Xuan Luo , Tongming Su , Xinling Xie , Liuyun Chen , Yuejing Bin , Zuzeng Qin , Hongbing Ji . Ga-doped Cu/γ-Al₂O₃ bifunctional interface sites promote the direct hydrogenation of CO₂ to DME. Acta Physico-Chimica Sinica, 2025, 41(10): 100126-0. doi: 10.1016/j.actphy.2025.100126
4. [4]
  Haotian Zhang , Shengfa Feng , Mufan Cao , Xiong Xiong Liu , Pengcheng Yuan , Yaping Wang , Min Gao , Long Pan , Zhengming Sun . Al₂O₃ coated polyimide porous films enable thin yet strong polymer-in-salt solid-state electrolytes for dendrite-free lithium metal batteries. Chinese Chemical Letters, 2025, 36(8): 111096-. doi: 10.1016/j.cclet.2025.111096
5. [5]
  Huiying ZHANG , Ping LI , Weixia DONG , Zhiwen HU , Qifu BAO , Qizheng DONG , Mingmin BAI , Wenqi LI . Photocatalytic performance of spheroidal nano Bi₄Ti₃O₁₂ prepared by surfactant-assisted hydrothermal reaction. Chinese Journal of Inorganic Chemistry, 2026, 42(3): 551-561. doi: 10.11862/CJIC.20250269
6. [6]
  Débora Ferreira dos Santos Morais , José Luis Tirado , Carlos Pérez-Vicente , Fabiana Villela da Motta , Pedro Lavela , Mauricio Bomio , Sergio Lavela . Unlocking the performance of sodium-ion batteries by coating Na₃V₂(PO₄)₃ with Nb₂O₅. Acta Physico-Chimica Sinica, 2026, 42(2): 100180-0. doi: 10.1016/j.actphy.2025.100180
7. [7]
  Min Hu , Yinghuan Li , Yanhong Bai , Yanping Ren , Juanjuan Song , Yongxian Fan , Dongcheng Liu , Xiuqiong Zeng , Faqiong Zhao , Wenwei Zhang , Mei Shi , Wan Li , Xiuyun Wang , Weihong Li , Xiaohang Qiu , Yong Fan , Jianrong Zhang , Shuyong Zhang . Suggestions on the Method of Hydrothermal-Solventthermal Synthesis and Their Operation Standards. University Chemistry, 2026, 41(3): 208-215. doi: 10.12461/PKU.DXHX202507034
8. [8]
  Shuhao FENG , Feibing XIONG , Yaqing LIN , Han SU , Xu HAN . Preparation and luminescent properties of alkaline metal doped Cd₃Al₂Ge₃O₁₂: Pr³⁺ orange phosphors. Chinese Journal of Inorganic Chemistry, 2026, 42(2): 284-296. doi: 10.11862/CJIC.20250171
9. [9]
  Zengsheng LI , Peijie LI , Jinhe HUANG , Yanbing ZHANG , Xiaobing WANG , Qiao FENG , Hua SUN , Kai LIU , Xiaoyan LI , Han MA , Ziyi XUAN , Xiangyang JING , Jiasen WANG , Haibo REN . Response surface methodology optimization of the preparation and performance of MnO_x/polydopamine@carbon nanotubes denitration catalyst. Chinese Journal of Inorganic Chemistry, 2026, 42(10): 2109-2118. doi: 10.11862/CJIC.20260145
10. [10]
  Xi YANG , Chunxiang CHANG , Yingpeng XIE , Yang LI , Yuhui CHEN , Borao WANG , Ludong YI , Zhonghao HAN . Co-catalyst Ni₃N supported Al-doped SrTiO₃: Synthesis and application to hydrogen evolution from photocatalytic water splitting. Chinese Journal of Inorganic Chemistry, 2025, 41(3): 440-452. doi: 10.11862/CJIC.20240371
11. [11]
  Qiang Huang , Yue Wang , Xuejie Wang , Lyubov G. Bulusheva , Tao Liu . La-Ce dual-doping modulates electronic structure and ion transport for enhanced ultrafast sodium storage in Na₄Fe₃(PO₄)₂P₂O₇ cathodes. Acta Physico-Chimica Sinica, 2026, 42(11): 100339-0. doi: 10.1016/j.actphy.2026.100339
12. [12]
  Chongbei Wu , Feihong Chu , Pengfei Kong , Yuanxin Dong , Gege Wang , Lefan Wang , Haitao Li , Meixin Zhang , Lifang Feng , Xuan Li , Jizhou Jiang . Interlayer interaction modulation via dihedral angle engineering in tetrazine COFs boosts charge transfer for photocatalytic H₂O₂ production. Acta Physico-Chimica Sinica, 2026, 42(11): 100385-0. doi: 10.1016/j.actphy.2026.100385
13. [13]
  Aoyun Meng , Zhenhua Li , Guoyuan Xiong , Zhen Li , Jinfeng Zhang . Rapid and stable degradation of dichlorvos on chili pepper and histamine in sardines using S-scheme Al6Si2O13/g-C3N4 nanocomposites. Chinese Journal of Structural Chemistry, 2026, 45(5): 100867-100867. doi: 10.1016/j.cjsc.2026.100867
14. [14]
  Xinxin Dai , Di Lan , Xingliang Chen , Xingwei Wang , Guangbin Ji . One pot green synthesis and electromagnetic wave absorption performance of manganese dioxide@nitrogen-doped carbon@NiFe₂O₄ hybrids. Acta Physico-Chimica Sinica, 2026, 42(8): 100302-0. doi: 10.1016/j.actphy.2026.100302
15. [15]
  Yuan Xue , Yanjun Zhang , Jun Du , Zushun Xu , Guangfu Liao , Qing Li . Introducing dual-functional site on carbon nitride: steering carrier migration and O₂ activation for boosted H₂O₂ photosynthesis. Acta Physico-Chimica Sinica, 2026, 42(9): 100311-0. doi: 10.1016/j.actphy.2026.100311
16. [16]
  Wei HE , Jing XI , Tianpei HE , Na CHEN , Quan YUAN . Application of solar-driven inorganic semiconductor-microbe hybrids in carbon dioxide fixation and biomanufacturing. Chinese Journal of Inorganic Chemistry, 2025, 41(1): 35-44. doi: 10.11862/CJIC.20240364
17. [17]
  Ting YANG , Jia AN , Jinyu ZHANG , Ruonan FAN , Rong YAN , Xiaoxia JING , Panpan CHANG , Wei YAN . Synergistic enhancement of ion migration and sulfur conversion kinetics in lithium-sulfur batteries by CeO₂/g-C₃N₄. Chinese Journal of Inorganic Chemistry, 2026, 42(3): 519-530. doi: 10.11862/CJIC.20250274
18. [18]
  Hongyi LI , Aimin WU , Liuyang ZHAO , Xinpeng LIU , Fengqin CHEN , Aikui LI , Hao HUANG . Effect of Y(PO₃)₃ double-coating modification on the electrochemical properties of Li[Ni_0.8Co_0.15Al_0.05]O₂. Chinese Journal of Inorganic Chemistry, 2024, 40(7): 1320-1328. doi: 10.11862/CJIC.20230480
19. [19]
  Ziwen Lei , Mingyin Liu , Jiayi Shi , Yahan Shan , Qi Zhang . 当超分子二肽遇上酸碱指示剂：热响应水凝胶的智能可视化. University Chemistry, 2026, 41(8): 210-219. doi: 10.12461/PKU.DXHX202508014
20. [20]
  Lina Guo , Ruizhe Li , Chuang Sun , Xiaoli Luo , Yiqiu Shi , Hong Yuan , Shuxin Ouyang , Tierui Zhang . Effect of Interlayer Anions in Layered Double Hydroxides on the Photothermocatalytic CO₂ Methanation of Derived Ni-Al₂O₃ Catalysts. Acta Physico-Chimica Sinica, 2025, 41(1): 100002-0. doi: 10.3866/PKU.WHXB202309002

Get Citation

PDF

XML

Metrics

PDF Downloads(35)
Abstract views(2647)
HTML views(509)

通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

Preparation of Ultrafine Flaky α-Al2O3 by Modified Bayer Process

Metrics

通讯作者: 陈斌, bchen63@163.com

Preparation of Ultrafine Flaky α-Al₂O₃ by Modified Bayer Process