A non-chromatographic method for the separation of highly pure naphthalene crystals from pyrolysis fuel oil

An innovative approach towards the extraction of highly pure naphthalene crystals was developed using efficient and inexpensive non-chromatographic solvent extraction method from pyrolysis fuel oil (PFO). Self-crystallization of naphthalene was established during the cooling process of extracted liquor. Naphthalene crystals were recrystallized with ethanol and fully characterized by various analytical techniques such as 1H and 13C NMR, FT-IR, TGA, GCMS etc. In general, the solvent extraction and self-crystallization techniques were capable of producing accurate data for native naphthalene from PFO.

Graphical abstractFigure optionsDownload full-size imageDownload as PowerPoint slideHighlights► Non-chromatographic solvent extraction and self-crystallization was developed for the extraction of naphthalene from PFO. ► Ethanol, methanol, n-hexane, acetone and diethylether were appropriate for extraction of naphthalene from PFO through ESC. ► Methanol was the best among the solvents in terms of overall yield (95%) in shortest cooling time.