Separation of anthracene from crude anthracene using gas antisolvent recrystallization
- Yuan-Ze Inst. of Tech., Neili (Taiwan)
Pure anthracene is mostly used for conversion to anthraquinone, an intermediate for the synthesis of very powerful vat dyestuffs. A coal tar distillate, crude anthracene, which contains 30% anthracene, 25% phenanthrene, 15% carbazole, and other impurities, was used as the model mixture. In this study, 90% by weight purity anthracene was obtained using gas antisolvent (GAS) recrystallization. The GAS process induces the separation of solids by introducing an antisolvent, carbon dioxide (or the supercritical fluid), into acetone which was used as the liquid solvent. The dissolution of the compressed gas into the solute-laden solution selectively lowers the solubilities of solid solutes and salts them out. The results showed that high purity anthracene was obtained at a high feed concentration and high pressure conditions. The separation factor of anthracene versus phenanthrene is close to 30.07.
- OSTI ID:
- 7172336
- Journal Information:
- Separation Science and Technology; (United States), Vol. 27:10; ISSN 0149-6395
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
ANTHRACENE
RECRYSTALLIZATION
COAL TAR OILS
MATERIALS RECOVERY
ACETONE
CARBAZOLES
CARBON DIOXIDE
COMPRESSED GASES
DISSOLUTION
EFFICIENCY
EXPERIMENTAL DATA
FLOWSHEETS
LIQUID COLUMN CHROMATOGRAPHY
PHASE DIAGRAMS
PHENANTHRENE
PRECIPITATION
PURIFICATION
SOLUBILITY
SUPERCRITICAL STATE
YIELDS
AROMATICS
AZAARENES
AZOLES
CARBON COMPOUNDS
CARBON OXIDES
CHALCOGENIDES
CHROMATOGRAPHY
CONDENSED AROMATICS
DATA
DIAGRAMS
FLUIDS
GASES
HETEROCYCLIC COMPOUNDS
HYDROCARBONS
INFORMATION
KETONES
MANAGEMENT
NUMERICAL DATA
OILS
ORGANIC COMPOUNDS
ORGANIC NITROGEN COMPOUNDS
OTHER ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
PROCESSING
SEPARATION PROCESSES
WASTE MANAGEMENT
WASTE PROCESSING
010402* - Coal
Lignite
& Peat- Purification & Upgrading
010500 - Coal
Lignite
& Peat- Products & By-Products