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Fractional Crystallization
About Crystallization
Crystallization is one of the most powerful purification methods available.
- Multicomponent mixtures exhibit very similar vapor pressures
- Temperature sensitive products
- Ultra high purities
General characteristics of crystallization:
- High purities
- High selectivities due to the regularity of the crystal lattice
- Solid-liquid phase equilibrium
- No solids handling
- Low labor costs
- Environmentally friendly
- Separation of mixtures forming azeotropes
- Replacement of traditional chemical separation methods
- Low energy consumption
Sulzer Chemtech has the following crystallization technologies available: Static melt crystallization, Falling film crystallization, Heat pump technology
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Crystallization can be used to purify many other chemicals.
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Plants from a few kg per day up to thousands of tons per year.
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Mobile pilot plant As only limited data are available in literature, tests are a prerequisite for a reliable plant design.
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Y. Viswanath and S. J. Pietsch
BP Amoco Corporation
Naperville, Illinois, USA
and
R. Stadler
Sulzer Chemtech Ltd
Buchs, Switzerland
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