Hydrochloric Acid → Formaldehyde;phenol

Participants

Reaction Conditions

Reaction Steps

A mixture of 300 g of phenol, 220 g of a 37% aqueous formaldehyde solution (the molar ratio of phenol to formaldehyde being 1:0.85) and 0.3 ml of 35% concentrated hydrochloric acid was heated under reflux at 85° C. for 5 hours with stirring. Thereafter, the reaction mixture obtained was cooled and added dropwise to water with stirring. The resulting precipitate was filtered off and dissolved in a small amount of methanol. The methanol solution thus obtained was poured into a large amount of water, and the resulting precipitate was filtered off and dried to give a phenol-formaldehyde condensate.

Provenance & Evidence