Abstract
Kinetics are an important cornerstone of all industrial processes, including crystallization. An attempt must be made to maximize the production rate of in-specification (saleable) material at the minimum cost. Crystallization kinetics have a role to play in the optimization of the production of both single-crystal and multi-crystal products. Particle characterization has a vital dual role in determining that the product meets the specification, and in permitting the crystallization kinetics to be determined. Single-crystal products include: electronic substrate materials, such as Si and GaAs, materials with special optical propertiess, and complex biochemical species for crystal structure determination. Specifications can include: high purity, high perfection , specific facets, specific crystallographic orientation and crystal dimensions, all of which fall within the scope of particle characterization. Crystallization kinetics, particularly face-specific growth rates, are important since when the rate of crystal growth is increased most of the specified product properties are adversely affected. Multi-crystal products include the majority of solid-phase bulk chemical products: pharmaceuticals, agrochemicals, intermediates and commodity chemicals. Specifications often include crystal size distribution, purity, powder flow properties, dissolution rate, etc. Here the complex inter-relationships between supersaturation, hydrodynamics, feed purity, etc., are described by the crystallization kinetics and have a significant influence on the quality of the material produced.
Original language | English |
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Pages (from-to) | 451-452 |
Number of pages | 2 |
Journal | Analytical Proceedings |
Volume | 30 |
Issue number | 11 |
DOIs | |
Publication status | Published - 1 Nov 1993 |
Keywords
- crystallisation
- kinetics
- crystal structure
- crystallization
- particle characterisation