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Preparation of strontium chloride hexahydrate by batch‐cooling crystallization: Control of crystal size and morphology
Author(s) -
Qian Yuanyuan,
Lu Guimin,
Sun Yuzhu,
Song Xingfu,
Yu Jianguo
Publication year - 2014
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.201400217
Subject(s) - supersaturation , crystallization , strontium chloride , morphology (biology) , crystal (programming language) , materials science , chloride , molar ratio , strontium , slow cooling , chemical engineering , crystallography , ion , chemistry , composite material , catalysis , organic chemistry , metallurgy , biology , computer science , engineering , genetics , programming language
The effects of initial supersaturation, cooling rate, and stirring rate on the morphology of strontium chloride hexahydrate (SrCl 2 ·6H 2 O) 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 SrCl 2 ·6H 2 O 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 SrCl 2 ·6H 2 O crystal changed to granule‐like, probably because of the strong interaction of CTAC with the SrCl 2 ·6H 2 O facets with a denser distribution of Cl − ions. This study offers a simple, flexible, and highly efficient approach to regulate the morphology of SrCl 2 ·6H 2 O crystals and opportunities for multiple applications of SrCl 2 ·6H 2 O.