Obtaining anthracene and carbazole by melt-crystallization
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United States of America Patent
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Issued Date -
Apr 8, 2004
app pub date -
Nov 12, 2003
filing date -
Jan 24, 2001
priority date (Note) -
Abandoned
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Abstract
In a method for obtaining anthracene and carbazole and their sequential products from the anthracene oil resulting during coal tar distillation or its purification products, anthracene oil or the purification product crude anthracene is converted into a melt without adding solvent, the melt is cooled under the crystallization point of carbazole and anthracene, the crystal product obtained is separated from the liquid phase, and the crystal product is distilled to obtain pure anthracene and pure carbazole.
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