Process for recovering anthracene

Details Process for recovering anthracene Process for recovering anthracene

1976-06-25

1978-01-24

Levine, Herbert

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

208328, C07C 1528

Patent

active

040704092

ABSTRACT:
A process for recovering anthracene from crude anthracene, which comprises treatment of crude anthracene with an aprotic bipolar solvent N,N-dimethylacetamide. After such treatment suspension I is obtained which is separated into liquid and solid phases. The solid phase is treated with N,N-dimethylacetamide at a temperature within the range of from 52.degree. to 135.degree. C to give suspension II containing impurities which are insoluble in the solvent employed. These impurities are separated from said suspension II, while the remaining solution is cooled to a temperature within the range of from -10.degree. to +40.degree. C to give suspension III containing crystals of anthracene. The resulting crystals are separated from the suspension.
The process according to the present invention makes it possible to recover anthracene from crude anthracene with a yield of from 76.6 to 80%. Purity grade of the final product, as to the content of anthracene, is 97.2 to 98.9%. The process is rather simple in respect of the employed technology.

REFERENCES:
patent: 2183852 (1939-12-01), Boyd
patent: 2783287 (1957-02-01), Nickolls et al.

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