Determination of solubility,metastable zone and crystal growth rate for sebacic acid
In order to promote the continuous production of sebacic acid,the solubility of sebacic acid in the range of 289.25-373.15 K was determined by dynamic method,and the metastable region of sebacic acid in the range of 333.15-353.15 K was determined by focused beam reflection measurement technology.The effect of saturation temperature and cooling rate on the metastable region and the relationship between supersaturation and crystal growth rate were studied.The results showed that the solubility of sebacic acid increased with the increase of temperature.The metastable zone of sebacic acid narrowed with the increase of saturation temperature and widened with the increase of cooling rate.The crystal growth rate of sebacic acid in aqueous solution was independent of the crystal size,but linearly increased with supersaturation.The growth rate constant was 3.611 × 10-6 g/(m2·s),and the growth order was 1.498.
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