Bisphenol A → 1,1,3,3-Tetramethylindan-5-ol

Participants

Reaction Conditions

Reaction Steps

750 g (5 mol) of 4-tert.-butylphenol and 320 g of an acid-activated fuller's earth are introduced into a 10 liter autoclave and heated to 180° C. 1960 g (35 mol) of isobutylene and 3420 g (15 mol) of molten 2,2-bis-(4-hydroxyphenyl)-propane are simultaneously pumped in over a period of 4 to 5 hours at the aforementioned temperature. The mixture is then left to react with stirring for another 4 hours at 180° C. The hot reaction mixture is then filtered off from the catalyst, giving 6100 g of a crude mixture from which 2230 g (11.7 mol) of 5-hydroxy-1,1,3,3-tetramethyl indane are obtained by fractional distillation.

Provenance & Evidence