Date of Award
Master of Science in Chemical Engineering - (M.S.)
George C. Keeffe
Jerome J. Salamone
C. L. Mantell
This investigation has shown that crystals of copper sulfate and magnesium sulfate when grown in supersaturated solutions exhibit a growth rate according to the following equation:
RL = 5.0 (ΔCDm)1/ρU Vs.292
where, RL, is the growth rate in Microns/min, is the change in concentration, Dm, the diffusivity coefficient, , density of solution, U, viscosity and Vs, solution velocity past the crystal.
The equation shown demonstrates that a mass transfer process is taking place from the solution to the crystal surface, and that within the velocity range studied, there was no effect shown by the interface orientation rate.
In a crystallizer where there is a mixture of crystals, the larger crystals will grow faster than those of a smaller size due to its higher relative solution velocity.
Crystal growth is dependent upon the other factors described in conjunction with the formulae, and the analogy between these factors is described in the main paper.
Palme, Josef Frank, "Correlation of crystal growth rates in supersaturated solutions" (1955). Theses. 2359.