ISOMERISIERUNGSVERFAHREN DER NEBENPRODUKTE IN DER BISPHENOLSYNTHESE.

摘要

The invention relates to a process for isomerizing the by-products from the preparation of a bis-phenol obtained from the condensation of a ketone and a phenol and which comprises treating the by-products either with a catalytic amount of an acid in the presence of a free mercaptan cocatalyst or with a catalytic amount of a sulfonated cation-exchange resin having a plurality of sulfonic acid sites ionically bonded to an alkylmercaptoamine and recovering a product having a higher concentration of the desired bis-phenol having the 4,4 min -dihydroxy form.