The effects of temperature on the spherical crystallization of salicylic acid
1984; Elsevier BV; Volume: 39; Issue: 1 Linguagem: Inglês
10.1016/0032-5910(84)85018-4
ISSN1873-328X
AutoresY. Kawashima, Motonari Okumura, H. Takenaka,
Tópico(s)Analytical Chemistry and Chromatography
ResumoThe effects of temperature on the spherical crystallization of salicyclic acid were investigated. An ethanolic solution of salicylic acid held at 40 °C was introduced into a well-dispersed mixture of chloroform and water at 5 to 30 °C. By increasing the temperature, larger agglomerates with less spherical forms composed of larger crystals were obtained. The mass growth rate of the agglomerated crystals was described by the mass transfer-controlled kinetics. The growth rate coefficient at 30 °C was significantly smaller than those at 10 and 20 °C. The linear growth rate of the agglomerated crystals increased with increasing temperature, but did not depend upon the solute bulk concentration.
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