Original Paper

Preparation of strontium chloride hexahydrate by batch-cooling crystallization: Control of crystal size and morphology

Yuanyuan Qian

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Guimin Lu,

Corresponding Author

Guimin Lu

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

Corresponding author: e-mail: [email protected], Phone (Fax): +86 21 64252065Search for more papers by this author

Yuzhu Sun,

Yuzhu Sun

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Xingfu Song,

Xingfu Song

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Jianguo Yu,

Jianguo Yu

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Yuanyuan Qian,

Yuanyuan Qian

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Guimin Lu,

Corresponding Author

Guimin Lu

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

Corresponding author: e-mail: [email protected], Phone (Fax): +86 21 64252065Search for more papers by this author

Yuzhu Sun,

Yuzhu Sun

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Xingfu Song,

Xingfu Song

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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Jianguo Yu,

Jianguo Yu

National Engineering Research Center for Integrated Utilization of Salt Lake Resources, East China University of Science and Technology, Shanghai, 200237 China

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First published: 27 October 2014

https://doi.org/10.1002/crat.201400217

Citations: 5

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Abstract

The effects of initial supersaturation, cooling rate, and stirring rate on the morphology of strontium chloride hexahydrate (SrCl₂·6H₂O) crystals were investigated by batch-cooling crystallization, providing optimal operating conditions. Uniform needle-like crystals with a length of 1200.50 μm and a width of 100.92 μm on average were obtained. The corresponding aspect ratio of length to width was about 11.90. Moreover, the morphological modification of SrCl₂·6H₂O crystals using cetyltrimethylammonium chloride (CTAC) was studied. When 20.30 mmol·L⁻¹ of CTAC was added, the length and width of crystals were 792.71 μm and 233.25 μm, respectively, and the corresponding aspect ratio decreased to 3.40. The shape of SrCl₂·6H₂O crystal changed to granule-like, probably because of the strong interaction of CTAC with the SrCl₂·6H₂O facets with a denser distribution of Cl⁻ ions. This study offers a simple, flexible, and highly efficient approach to regulate the morphology of SrCl₂·6H₂O crystals and opportunities for multiple applications of SrCl₂·6H₂O.

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Volume49, Issue11

November 2014

Pages 878-887

Preparation of strontium chloride hexahydrate by batch-cooling crystallization: Control of crystal size and morphology

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Preparation of strontium chloride hexahydrate by batch-cooling crystallization: Control of crystal size and morphology

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