Acetic Acid → Formaldehyde;phenol

Participants

Reaction Steps

Charged in a reaction vessel equipped with a reflux cooler, a pressure-reducing device and a stirrer, were 94 parts of carbolic acid, 162 parts of formalin (37% aqueous solution) and 30 parts of sodium hydroxide (10% aqueous solution). The temperature was elevated and the reaction carried out at 60° C. for 7 hours. Acetic acid was added to neutralize the reaction mixture and adjust the pH to 4 to 5 and dehydration was carried out under reduced pressure. The obtained resin washeated and, while being stirred, deionized water was gradually added to theresin to adjust the solid content to 50%, thus providing a water-soluble resol type phenolic resin (6) (the formalin/carbolic acid molar ratio was 2.0).

Provenance & Evidence