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Brazilian Journal of Chemical Engineering

Print version ISSN 0104-6632On-line version ISSN 1678-4383


FREITAS, A. M. B.; LANDGRAF, F. J. G.; NYVLT, J.  and  GIULIETTI, M.. Effect of magnetic field on the crystallization of zinc sulfate. Braz. J. Chem. Eng. [online]. 2000, vol.17, n.1, pp.111-115. ISSN 1678-4383.

The effect of magnetic field on the crystallization of diamagnetic zinc sulfate was investigated in a series of controlled batch cooling experiments. Zinc sulfate solutions were exposed to magnetic fields of different intensities, up to a maximum of 0.7T. A clear influence of magnetic field on the following zinc sulfate crystallization parameters was found: an increase in saturation temperature, a decrease in metastable zone width, and an increase in growth rate and average crystal size. These effects were observed for the diamagnetic zinc sulfate, but not in similar, previously reported experiments for paramagnetic copper sulfate.

Keywords : batch crystallization; magnetic field; zinc sulfate; diamagnetism.

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