Polymorph transformation and formation mechanism of calcium carbonate during reactive extraction-crystallization process

被引：0

作者：

Li, Yunzhao ^{[1
]}

Song, Xingfu ^{[1
]}

Sun, Yuzhu ^{[1
]}

Sun, Ze ^{[1
]}

Yu, Jianguo ^{[1
]}

机构：

[1] National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai

来源：

Huagong Xuebao/CIESC Journal | 2015年 / 66卷 / 10期

关键词：

Calcium carbonate; Crystallization; Polymorph transformation; Solvent extraction; Waste treatment;

D O I：

10.11949/j.issn.0438-1157.20150373

中图分类号：

学科分类号：

摘要：

Distiller waste produced in ammonia-soda process restricts the development of soda industry. In this study, the polymorph transformation and crystallization mechanism of calcium carbonate in the reactive extraction-crystallization coupled process were investigated. The results show that carbon dioxide (CO2) is first absorbed by the organic phase and then transferred to the aqueous phase. Calcium bicarbonate is generated and then decomposed into amorphous calcium carbonate rapidly. Temperature has a significant effect on the polymorph of calcium carbonate. Needle-like aragonite forms preferentially at higher temperatures and spherical and flower-like vaterite forms preferentially at lower temperatures. Both of them will finally transform into rhombic calcite by dissolution and recrystallization. At 20℃, the formation of new vaterite and its transformation to calcite occur simultaneously in the coupled process. The content of vaterite in the particles increases with the increase of CO2 concentration. © All right reserved.

引用

页码：4007 / 4015

页数：8

共 32 条

[1] Yang R., Zhang K., The development situation and market analysis of soda industry in China, Soda Industry, 1, pp. 9-11, (2012)
[2] Mao A., Comprehensive utilization of waste liquid and soda dregs in soda production by ammonia-soda process, Journal of Chemical Industry & Engineering, 22, 2, pp. 31-32, (2001)
[3] Kasikowski T., Buczkowski R., Cichosz M., Utilisation of synthetic soda-ash industry by-products, International Journal of Production Economics, 112, 2, pp. 971-984, (2008)
[4] Kasikowski T., Buczkowski R., Lemanowska E., Cleaner production in the ammonia-soda industry: An ecological and economic study, Journal of Environmental Management, 73, 4, pp. 339-356, (2004)
[5] Kasikowski T., Buczkowski R., Dejewska B., Peszynska B.K., Lemanowska E., Iglinski B., Utilization of distiller waste from ammonia-soda processing, Journal of Cleaner Production, 12, 7, pp. 759-769, (2004)
[6] Synowiec P.M., Bunikowska B., Application of crystallization with chemical reaction in the process of waste brine purifying in evaporative sodium chloride production, Industrial & Engineering Chemistry Research, 44, 7, pp. 2273-2280, (2005)
[7] Gao C., Dong Y., Zhang H., Zhang J., Utilization of distiller waste and residual mother liquor to prepare precipitated calcium carbonate, Journal of Cleaner Production, 15, 15, pp. 1419-1425, (2007)
[8] Mao X., Song X., Lu G., Sun Y., Xu Y., Yu J., Effects of metal ions on crystal morphology and size of calcium sulfate whiskers in aqueous HCl solutions, Industrial & Engineering Chemistry Research, 53, 45, pp. 17625-17635, (2014)
[9] Li Y., Song X., Chen G., Sun Z., Xu Y., Yu J., Preparation of calcium carbonate and hydrogen chloride from distiller waste based on reactive extraction-crystallization process, Chemical Engineering Journal, 278, pp. 55-61, (2015)
[10] Jiang J., Ye J., Zhang G., Gong X., Nie L., Liu J., Polymorph and morphology control of CaCO3 via temperature and PEG during the decomposition of Ca(HCO3)2, Journal of the American Ceramic Society, 95, 12, pp. 3735-3738, (2012)

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