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A. Burel, S.J.T. Brugman, M. Mignot, Y. Cartigny, S. Tisse, N. Couvrat, V. Peulon-Agasse, P. Cardinael, G. Coquerel,

Phenanthrene Purification: comparison of zone melting and co-crystallization,

Chem. Eng. Technol. 39 no. 7 (2016) 1317-1325

Abstract:

The purification of phenanthrene is a prerequisite before studying its solid-solid

phase transition at the molecular scale. Two purification methods, namely, zone

melting and co-crystallization with 3,5-dinitrobenzoic acid, were separately

studied and compared, in view of reaching ultrapurity which means a purity of

> 99.9 mol %. An explanation of the relationship between the efficiency of both

techniques by using phase diagrams has been attempted. A novel strategy is proposed

to optimize phenanthrene ultrapurification based on a combination of the

two methods.