Design of integrated crystallization systems

Choosing an operating policy for seeded batch crystallization

“…Equation 2 can be converted to a series of ordinary differential equations by the well-known method of moments, 7 where the ith moment of the crystal-size distribution is defined as…”

“…The majority of researchers have found that the optimal temperature trajectory is one which leads to an increase in supersaturation near the end of the batch (here termed "late growth"), and this has been suggested as a generally valid heuristic. 2 However, a significant minority of researchers have found a result which in some sense is almost exactly opposite: that the optimal policy has an increased supersaturation at the beginning of the batch (here termed "early growth"). Still other researchers have indicated that, at least to a first approximation, the optimal way to operate a seeded batch crystallizer is to maintain constant supersaturation.…”

Plantwide operation of processes with crystallization

“…The bottoms product from the concentrating still is fed to a cooling crystallizer, which is operated at 608C. Physical properties and kinetic parameters for the crystallization of adipic acid are taken from Wibowo et al 18 The effluent from the crystallizer is fed through a filter, which separates the adipic acid crystals from the solution. The remaining liquid, which includes unreacted cyclohexanol and uncrystallized adipic acid as well as nitric acid and water, is fed back to the reactor.…”

Hanford Supplemental Treatment: Literature and Modeling Review of SRS HLW Salt Dissolution and Fractional Crystallization

“…The effect of the crystallization process on the downstream processing steps and methods to alleviate problems is described by Wibowo 2001. A systematic procedure is developed for designing an integrated crystallization system by considering the interaction between crystallization and downstream processing.…”

“…Techniques described in (Wibowo 2001) are applied to an existing industrial crystallization process by (Cesar 1999). A systematic method is presented for improving the recovery of the desirable product in an existing fractional crystallization process.…”