Abstract
Benzole acid is crystallised from saturated ethanol-water solutions by adding water or an ethanol-water mixture in semi-batch experiments. The influence of precipitant addition rate, ethanol concentration in the bulk solution and ethanol concentration in the feed, have been studied. The product particles are characterised by microscopic determination of the projected area diameter and the aspect ratio. It is found that benzole acid crystals grown from ethanol-water solutions range from needles to platelets. The mean size ranges from 69 to 218 μm while the aspect ratio varies from 1.3 to 10.2. The influence of process variables on the product size and shape are discussed in terms of the influence of supersaturation and of the solvent composition. By attachment energy modelling, the surface chemistry is examined.
Original language | English |
---|---|
Pages (from-to) | 780-788 |
Number of pages | 9 |
Journal | Journal of Crystal Growth |
Volume | 198-199 |
Issue number | PART I |
DOIs | |
Publication status | Published - 1999 |
Externally published | Yes |
Keywords
- Attachment energy model
- Drowning-out crystallization
- Product characteristics
- Solubility of benzole acid
- Surface chemistry