Formaldehyde → Bis(2-hydroxyphenyl)methane

Participants

Reaction Conditions

Reaction Steps

There were mixed 2000 g of phenol and 172.5 g of 37% formalin (P/F=10) and then 5.6 g of oxalic acid dihydrate was added to the mixture, followed by reacting the mixture with heating at 70° C. for 4 hours. Then the reaction system thus obtained was heated to 160° C. under atmospheric pressure to remove the water and a small amount of phenol and further heated at a pressure of 20 mm Hg till the temperature reached 170° C. to remove unreacted phenol. Then the product was heated at 210° C. and a pressure of 6 mm Hg to further remove the remaining unreacted phenol to give 350 g of a crude bisphenol F.

Provenance & Evidence