Formaldehyde → 1-Naphthaldehyde

Participants

Reaction Conditions

Reaction Steps

A bottom-removable four-necked flask having an inner volume of 1 L and equipped with a Dimroth condenser, a thermometer and a stirring blade was charged with 64.1 g of naphthalene (0.5 mol, produced by Kanto Chemical Co., Inc.), 150 g of an aqueous 40% by mass formalin solution (2 mol as formaldehyde, produced by Mitsubishi Gas Chemical Company, Inc.) and 79.7 g of 98% by mass sulfuric acid (produced by Kanto Chemical Co., Inc.) in a nitrogen stream, and the content of the flask was reacted while stirring under reflux under ordinary pressure at 100° C. for 6 hours. Thereto was added 150 g of ethylbenzene (produced by Kanto Chemical Co., Inc.) as a dilution solvent and left to still stand, and then an aqueous phase as a lower phase was removed. Furthermore, the resultant was subjected to neutralization and washing with water, and ethylbenzene and unreacted naphthalene were distilled off under reduced pressure to thereby provide 69.7 g of a naphthalene formaldehyde resin as a light yellow solid.

Provenance & Evidence