Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions

CIESC Journal ›› 2010, Vol. 18 ›› Issue (3): 500-505.

Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions

蔡卫权¹, 李会泉², 张光旭¹

1. School of Chemical Engineering, Wuhan University of Technology, Wuhan 430070, China;
2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

收稿日期:2010-01-02 修回日期:2010-04-08 出版日期:2010-06-28 发布日期:2010-06-28
通讯作者: CAI Weiquan,E-mail:wqcai@home.ipe.ac.cn
基金资助:
Supported by the China Postdoctoral Science Foundation(20080440142)

Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions

CAI Weiquan¹, LI Huiquan², ZHANG Guangxu¹

1. School of Chemical Engineering, Wuhan University of Technology, Wuhan 430070, China;
2. Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080, China

Received:2010-01-02 Revised:2010-04-08 Online:2010-06-28 Published:2010-06-28
Supported by:
Supported by the China Postdoctoral Science Foundation(20080440142)

摘要/Abstract

摘要： Hydrogen peroxide(H₂O₂)precipitation from sodium aluminate(SA)solution at close-ambient temperature is an efficient method to synthesize boehmite and its derived alumina with high surface area,but the precipitation yield of Al₂O₃ is usually below 50%in highly alkaline SA solutions.Here the synthesis of boehmite is enhanced through a precarbonization-assisted H₂O₂ route in highly alkaline SA solutions.It is found that the crystal structure of the precipitation product is evidently influenced by the precipitation conditions.As the precipitation temperature increases from 273 to 325 K,a small amount of gibbsite by-product is formed.As the aging temperature increases from 301 to 333 K,the crystallinity of boehmite decreases and part of the boehmite dissolves due to an increase in the pH value.Based on the above results,a precarbonization-assisted H₂O₂ route is proposed to obtain pure boehmite with more complete recovery of Al₂O₃ from highly alkaline SA solutions.The route includes a controllable precarbonization step of SA solutions with a molar ratio of Na₂O to Al₂O₃ higher than 2:1,followed by the H₂O₂-precipitated step with a molar ratio of H₂O₂ to Al₂O₃ less than 7:1.Because of its facile operation conditions,no extraneous impurity,time saving and a possible recycle of the filtrate,the route has great potential to be an alternative method for preparation of boehmite and its derived alumina.

关键词: boehmite, sodium aluminate solution, hydrogen peroxide, precarbonization

Abstract: Hydrogen peroxide(H₂O₂)precipitation from sodium aluminate(SA)solution at close-ambient temperature is an efficient method to synthesize boehmite and its derived alumina with high surface area,but the precipitation yield of Al₂O₃ is usually below 50%in highly alkaline SA solutions.Here the synthesis of boehmite is enhanced through a precarbonization-assisted H₂O₂ route in highly alkaline SA solutions.It is found that the crystal structure of the precipitation product is evidently influenced by the precipitation conditions.As the precipitation temperature increases from 273 to 325 K,a small amount of gibbsite by-product is formed.As the aging temperature increases from 301 to 333 K,the crystallinity of boehmite decreases and part of the boehmite dissolves due to an increase in the pH value.Based on the above results,a precarbonization-assisted H₂O₂ route is proposed to obtain pure boehmite with more complete recovery of Al₂O₃ from highly alkaline SA solutions.The route includes a controllable precarbonization step of SA solutions with a molar ratio of Na₂O to Al₂O₃ higher than 2:1,followed by the H₂O₂-precipitated step with a molar ratio of H₂O₂ to Al₂O₃ less than 7:1.Because of its facile operation conditions,no extraneous impurity,time saving and a possible recycle of the filtrate,the route has great potential to be an alternative method for preparation of boehmite and its derived alumina.

Key words: boehmite, sodium aluminate solution, hydrogen peroxide, precarbonization

蔡卫权, 李会泉, 张光旭. Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions[J]. CIESC Journal, 2010, 18(3): 500-505.

CAI Weiquan, LI Huiquan, ZHANG Guangxu. Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions[J]. , 2010, 18(3): 500-505.

参考文献

1 Mercuri, F., Costa, D., Marcus, P., “Theoretical investigations of the relaxation and reconstruction of the γ-AlO(OH) boehmite(101) surface and boehmite nanorods”, J. Phys. Chem. C, 113, 5228-5237(2009).
2 Cai, W.Q., Yu, J.G., Cheng, B., Su, B.L., Jaroniec, M., “Synthesis of boehmite hollow core/shell and hollow microspheres via sodium tartrate-mediated phase transformation and their enhanced adsorption performance in water treatment”, J. Phys. Chem. C, 113, 14739-14746(2009).
3 Zhang, J., Wei, S.Y., Lin, J., Luo, J.J., Liu, S.J., Song, H.S., Elawad, E., Ding, X.X., Gao, J.M., Qi, S.R., Tang, C.C., “Template-free preparation of bunches of aligned boehmite nanowires”, J. Phys. Chem. B, 110, 21680-21683(2006).
4 Zhao,Y.Y., Frost, R.L., Martens, W.N., Zhu, H.Y., “Growth and surface properties of boehmite nanofibers and nanotubes at low temperatures using a hydrothermal synthesis route”, Langmuir, 23, 9850-9859(2007).
5 Okada, K., Nagashima, T., Kameshima, Y., Yasumori, A., Tsukada, T., “Relationship between formation conditions, properties, and crystallite size of boehmite”, J. Colloid Interface Sci., 253, 308-314(2002).
6 Fazlollahnejad1, M., Taghizadeh1, M., Eliassi, A., Bakeri, G., “Experimental study and modeling of an adiabatic fixed-bed reactor for methanol dehydration to dimethyl ether”, Chin. J. Chem. Eng., 17, 630-634(2009).
7 El-Katatny, E.A., Halawy, S.A., Mohamed, M.A., Zaki, M., “A novel synthesis of high-area alumina via H₂O₂-precipitated boehmite from sodium aluminate solutions”, J. Chem. Technol. Biotechnol., 72, 320-328(1998).
8 Cai, W.Q., Yu, X.F., “Preparation of macro-mesostructured pseudoboehmite and γ-Al₂O₃ with high surface area”, Prog. Chem., 19, 1322-1330(2007).(in Chinese)
9 Caiut, J.M.A., Dexpert-Ghys, J., Kihn, Y., Vérelst, M., Dexpert, H., Ribeiro, S.J.L., Messaddeq, Y., “Elaboration of boehmite nano-powders by spray-pyrolysis”, Powder Technol., 190, 95-98(2009).
10 Skoufadis, C., Panias, D., Paspaliaris, I., “Kinetics of boehmite precipitation from supersaturated sodium aluminate solutions”, Hydrometallurgy, 68, 57-68(2003).
11 Cai, W.Q., Li, H.Q., Zhang, G.X., “An innovative approach for pseudoboehmite precipitation from seeded sodium aluminate solutions”, J. Phys. Chem. Solids, 71, 515-518(2010).
12 Cai, W.Q., Yu, J.G., Mann, S., “Template-free hydrothermal fabrication of hierarchically organized γ-AlOOH hollow microspheres”,Micropor. Mesopor. Mater., 122, 42-47(2009).
13 Mel, N.V.B., Vershinin, V.I., “Aluminum hydroxide production process”, RU Pat., 2124478(1999).
14 El-Katatny, E.A., Halawy, S.A., Mohamed, M.A., Zaki, M.I., “Recovery of ethene-selective FeO_x/Al₂O₃ ethanol dehydration catalyst from industrial chemical wastes”, Appl. Catal. A-Gen., 199, 83-92(2000).
15 El-Katatny, E.A., Halawy, S.A., Mohamed, M.A., Zaki, M.I., “Surface composition, charge and texture of active alumina powders recovered from aluminum dross tailings chemical waste”, Powder Technol., 132, 137-144(2003).
16 Cai, W.Q., Li, H.Q., Zhang, Y., “Influences of processing techniques of the H₂O₂-precipitated pseudoboehmite on the structural and textural properties of γ-Al₂O₃ ”, Colloid Surface A, 295, 185-192(2007).
17 Zhu, H.F., Preparation of Catalyst Supports and Their Application Technologies, Petroleum Industry Press, Beijing, 320-321(2002).(in Chinese)
18 Zhu, H.Y., Gao, X.P., Song, D.Y., Bai, Y.Q., Ringer, S.P., Gao, Z., Xi, Y.X., Martens, W., Riches, J.D., Frost, R.L., “Growth of boehmite nanofibers by assembling nanoparticles with surfactant micelles”, J. Phys. Chem. B, 108, 4245-4247(2004).
19 Panias, D., Krestou, A., “Effect of synthesis parameters on precipitation of nanocrystalline boehmite from aluminate solutions”, Powder Technol., 175, 163-173(2007).
20 Wang, D.G., Guo, F., Chen, J.F., Liu, H., Zhang, Z.T., “Preparation of nano aluminium trihydroxide by high gravity reactive precipitation”, Chem. Eng. J., 121, 109-114(2006).
21 Yang, Q.H., Li, D.D., Zhuang, F.C., Shi, Y.H., Kang, X.H., Jin, Z.M., “Studies on conversion mechanism in preparation of pseudoboehmite through neutralization of NaAlO₂ solution by CO₂ ”, Chin. J. Catal., 18, 478-482(1997).(in Chinese)
22 Wang, D.G., Guo, F., Chen, J.F., Shao, L., Liu, H., Zhang, Z.T., “A two-step way to synthesize nano inner-modified aluminum trihydroxide”, Colloid Surface A., 293, 201-209(2007).
23 Chen, J.F., Shao, L., Guo, F., Wang, X.M., “Synthesis of nano-fibers of aluminum hydroxide in novel rotating packed bed reactor”, Chem. Eng. Sci., 58, 569-575(2003).
24 Xie, Y.L., Bi, S.W., Yang, Y.H., Wang, Z., “Researchon structure of sodium aluminate solution in alumina production”, Nonferrous Metals, 53, 59-61(2001).(in Chinese)
25 Marciano, S., Mugnier, N., Clerin, P., Cristol, B., Moulin, P., “Nanofiltration of Bayer process solutions”, J. Membrane Sci., 281, 260-267(2006).

[1]	程健, 郭烈锦, 许世森, 张瑞云, 李晨. 薄姆石合成亚微米γ-偏铝酸锂[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 776-783.
[2]	卢义玉, 刘勇, 夏彬伟, 左伟芹. 空化水射流结合双氧水降解苯酚[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 760-767.
[3]	李文军, 吴笛, 石鑫, 文利雄, 邵磊. 超声波与过氧化氢联合法降解偶氮二甲酰胺工业废水中的有机氨氮[J]. Chinese Journal of Chemical Engineering, 2012, 20(4): 754-759.
[4]	Asghar Molaei Dehkordi, Mohammad Amin Sobati, Mohammad Ali Nazem. Oxidative Desulfurization of Non-hydrotreated Kerosene Using Hydrogen Peroxide and Acetic Acid[J]. CIESC Journal, 2009, 17(5): 869-874.
[5]	Tahir Imran QURESHI, Hong-Tae KIM, Young-Ju KIM. 用UV/H₂O₂,UV/O₃,UV/H₂O₂/O₃催化处理城市固体垃圾填埋渗出物[J]. CIESC Journal, 2002, 10(4): 444-449.

Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions

Enhancement on Synthesis of Boehmite Through a Precarbonization-assisted Hydrogen Peroxide Route in Highly Alkaline Sodium Aluminate Solutions

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 5

编辑推荐

Metrics

本文评价