Process for producing 2,6-dimethylnaphthalene

Details Process for producing 2,6-dimethylnaphthalene Process for producing 2,6-dimethylnaphthalene

1996-12-30

1999-09-07

Caldarola, Glenn

Chemistry of hydrocarbon compounds

Purification, separation, or recovery

By cooling of liquid to obtain solid, e.g., crystallization,...

585477, 585478, 585479, 585812, 585813, 585814, 585816, 585817, C07C 522, C07C 714

Patent

active

059489499

ABSTRACT:
A process for producing highly pure 2,6-dimethylnaphthalene in a high yield from a mixture of dimethylnaphthalene isomers in the presence of a solvent, such as an aliphatic or alicyclic saturated hydrocarbon. Highly pure 2,6-dimethylnaphthalene can be produced steadily for a long time by filtering the 2,6-dimethylnaphthalene crystal precipitated by the crystallizing by using a filtration apparatus, such as a rotary vacuum filter, peeling-off the filtered cake from a filter cloth and cleaning the filter cloth with a solvent, at a temperature not lower than a filtration temperature.

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