Analysis of Batch Crystallization Processes

Wey, J. S.

doi:10.1080/00986448508911230

Cited by 22 publications

(10 citation statements)

References 19 publications

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“…In the case of batch processes, the width of the CSD generally tends to increase on an undesirable fashion as a function of time. As shown in the literature [3][4], this experimental observation can be reproduced by computer simulations.…”

Section: Introductionsupporting

confidence: 73%

Investigation of the growth rate of β-cyclodextrin in water during both flow-cell and batch experiments

Köhl¹,

Puel

Klein

et al. 2004

Journal of Crystal Growth

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Section: Introductionsupporting

confidence: 73%

Investigation of the growth rate of β-cyclodextrin in water during both flow-cell and batch experiments

Köhl¹,

Puel

Klein

et al. 2004

Journal of Crystal Growth

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“…Reviews on crystallization phenomena from liquid solution in the literature include those of Randolph (1988), Mullin (1979, Rosenberger (1979), Ohara (1973, Garside (1984), Brice (1986), Wey (1985), strickland (1968), Nyvlt (1971), Hartman (1973) and Pamplin (1980).…”

Section: Nucleation and Crystal Growth Kineticsmentioning

confidence: 99%

“…A typical plot of the oversize cumulative number versus size distribution for the dissolution process is illustrated in Figure 1.6. The dissolution rate (DR) of a particle at size L is expressed as (Wey, 1985),…”

Section: Determination Of Dissolution Ratementioning

confidence: 99%

The kinetics of solvent-mediated phase transformations

1985

Proc. R. Soc. Lond. A

334

210

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A number of mineralogical and synthetic precipitates undergo solid to solid phase changes via a solution phase. A review of the literature reveals a lack of both experimental data and a framework for its interpretation. A model is developed, for the case of a polymorphic phase transformation, which involves the dissolution of the metastable phase and growth of nuclei of the stable phase. The concepts of dissolution and growth time scales have been introduced and it is shown that their sum is the time required for the disappearance of the metastable phase. Mechanistic insight is best obtained by measurement of the supersaturation profile rather than conversion data. It is shown that such profiles are dominated by the plateau supersaturation, which is the point at which dissolution and growth are balanced. Its value is determined by the relative surface areas of the phases and their kinetic constants. The model has been successfully used to simulate available kinetic data for the α → β polymorphic transformation in copper phthalocyanine.

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“…Figure 1 (adapted from Wey (1985)) depicts the feedback between the various process variables at a given hydrodynamic regime. However we have assumed the kinetic constants to be temperature independent to avoid introduction of more adjustable parameters.…”

Section: Batch Crystallizer Governing Equationsmentioning

confidence: 99%

“…Slight variations in one kinetic parameter can lead to large fluctuations in n(t, L) and frequently lead to unstable population distributions. Figure 1 (adapted from Wey (1985)) depicts the feedback between the various process variables at a given hydrodynamic regime.…”

Section: Batch Crystallizer Governing Equationsmentioning

confidence: 99%

Iterative parameter estimation for extraction of crystallization kinetics of potassium chloride from batch experiments

Dash

Rohani

1993

Can J Chem Eng

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Extraction of crystallization kinetics, the fundamental information which governs the performance of a crystallization process, is characterized by experimental difficulties in MSMPR and mathematical difficulties in batch crystallization. Here, a rigorous approach is taken to estimate kinetic parameters from a batch crystallizer. The two step Lax-Wendorff technique is adapted for the solution of the population balance in a batch crystallizer and an iterative self-correcting least squares algorithm is implemented for the estimation of the kinetic parameters. The need for multi-response estimation as opposed to single-response from terminal CSD is demonstrated. The kinetics extracted are average ones. representing primary and secondary nucleation kinetics. It is found that the kinetic parameters estimated by multi-response technique have a superior predictive capability as opposed to those obtained using the terminal CSD only. An advantage of the proposed algorithm is that the measurement of course of supersaturation, which is difficult to perform, is not required. L'extraction de la cinCtique de cristallisation, information fondamentale qui gouverne la performance du procede de cristallisation, se caracttrise par des difficultts experimentales dans le MSMPR et des difficultis mathematiques dans la cristallisation discontinue. On a adopt6 une approche rigoureuse pour l'estimation des paramktres cinttiques avec le cristalliseur discontinu. La mCthode en deux Ctapes de Lax-Wendorff a etC adaptte pour la solution du bilan de population dans un cristalliseur discontinu, et un algorithme de moindres carrts auto-correctif itkratif est introduit pour l'estimation des parambtres cinCtiques. On dtmontre le besoin d'une estimation B rCponses multiples plut8t qu'B riponse unique avec le CSD terminal. Les cinCtiques extraites sont moyennes et repkentent des cinCtiques de nucltation primaires et secondaires. Les parambtres cinetiques estimCs par la technique B rCponses multiples montrent une capacitk de prkdiction supCrieure par rapport aux paramkres obtenus avec le CSD terminal uniquement. L'algorithme proposC a un avantage, B savoir que la mesure de 1'Cvolution vers la sursaturation, qui est difficile B rtaliser. n'est pas nkcessaire. ___--_____

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Analysis of Batch Crystallization Processes

Cited by 22 publications

References 19 publications

Investigation of the growth rate of β-cyclodextrin in water during both flow-cell and batch experiments

Investigation of the growth rate of β-cyclodextrin in water during both flow-cell and batch experiments

The kinetics of solvent-mediated phase transformations

Iterative parameter estimation for extraction of crystallization kinetics of potassium chloride from batch experiments

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