Sulfuric Acid → 2,2'-Methylenebis(4-methyl-6-tert-butylphenol)

Participants

Reaction Conditions

Reaction Steps

Into a reactor provided with a stirrer, thermometer and a heating bath there are charged 220 g (1 g.-mol) of 2,6-ditert.butyl-4-methylphenol, 2.2. g of concentrated sulfuric acid and the mixture is heated to the temperature of 120° C. While maintaining the temperature at 120° C., 94 g (1.24 g-mol) of methylal are fed into the reactor for 1.5 hour. On completion of the reaction, the catalyst is separated, volatile products are distilled under vacuum to give 143.0 g of 2,2'-methylene-bis(4-methyl-6-tert.butylphenol) which corresponds to 97.8% of theory as calculated for the reacted 2,6-ditert.butyl-4-methylphenol (conversion degree of the latter is 86.0%).

Provenance & Evidence