| 摘要 |
PURPOSE:To readily, industrially and advantageously obtain the titled compounds useful as a raw material for polymer in high yield, by carrying out debutylation reaction of an alkylbiphenol having tertiary butyl group in an organic solvent while successively adding an acid catalyst. CONSTITUTION:An alkylbiphenol, such as 3,3',5,5'-tetratertiary butyl-4,4'-biphenol, having at least one tertiary group is subjected to debutylation reaction in an organic solvent, such as diethylbenzene, at 100-200 deg.C preferably by purging the interior of the system with an inert, gas, such as N2, for discharging isobutylene gas formed as a by-product while successively adding an acid catalyst, such as p-toluenesulfonic acid, normally divided into 2-5 portions, to suppress coloring and deteriorating of the product and afford the aimed high- purity white compound useful as a monomer which is a starting raw material for heat-resistant engineering plastics. The amount of the catalyst required is 10-0.01wt.% based on the biphenol. |
