A design correlation is presented for the prediction of steady state product size distributions resulting from a continuous crystallizer, based upon a single experimental determination. This has been accomplished by the definition of a new parameter called the "degree of crystallization," which has been related to the experimental nucleation and growth rates in a salting-out crystallizer. The correlation resulted from the detection of variations in the suspension density of the mother liquor which has previously been assumed constant in certain power law models. The degree of crystallization has also been described in terms of dimensionless number, length and area moments which characterize a mathematical model to predict transient size distributions resulting from system upsets in residence time.
Included in this unsteady-state model is a unique phase space solution among the moments which has been confirmed by a digital computer solution. Computer simulation shows that the assumption of constant suspension density leads to an oscillatory behavior of the number, length and area moments. However, simulations in which the assumption was relaxed to permit variations in suspension density were characterized by a smooth self-regulatory operation. Separate studies conducted in a batch crystallizer of special design validates the assumption of McCabe's ΔL law in this work.
Level of Degree
Chemical and Biological Engineering
First Committee Member (Chair)
George H. Quentin
Second Committee Member
Kenneth Edward Cox
Third Committee Member
Richard Emmett Dascher
Parthasarathy, Karichangal C.. "Kinetics and Dynamics of Continuous Crystallization." (1972). https://digitalrepository.unm.edu/cbe_etds/85