Formaldehyde → 1-Naphthaldehyde

Participants

Reaction Conditions

Reaction Steps

A bottom-removable four-necked flask having an inner volume of 2 L and equipped with a Dimroth condenser, a thermometer and a stirring blade was charged with 288 g of naphthalene (2.25 mol, produced by Wako Pure Chemical Industries, Ltd.), 821 g of an aqueous 37% by mass formalin solution (10.1 mol as formaldehyde, produced by Mitsubishi Gas Chemical Company, Inc.) and 407 g of 98% by mass sulfuric acid (produced by Mitsubishi Gas Chemical Company, Inc.) in a nitrogen stream, and the content of the flask was reacted while stirring under reflux under ordinary pressure at about 100° C. for 7 hours. Thereto was added 500 g of ethylbenzene (produced by Wako Pure Chemical Industries, Ltd.) 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, ethylbenzene and unreacted naphthalene were distilled off under reduced pressure to thereby provide 379 g of a naphthalene formaldehyde resin as a light yellow solid.

Provenance & Evidence