Abstract: The present invention relates to a process for preparing bisphenol A in the presence of cumene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.

Abstract: The present invention relates to a process for preparing bisphenol A in the presence of acetophenone without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.

Abstract: The present invention relates to a process for preparing bisphenol A in the presence of benzene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.

Abstract: The present invention relates to a process for preparing bisphenol A in the presence of 2-methyl benzofuran without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is neither covalently nor ionically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate.

Abstract: The present invention relates to a process for preparing bisphenol A in the presence of alpha-methylstyrene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst. Moreover, the present invention provides a process for preparing polycarbonate.

Abstract: The present invention relates to a process for preparing bisphenol A in the presence of at least two impurities being selected from the group consisting of 2-methylbenzofurane, hydroxyacetone, alpha-methylstyrene, acetophenone, benzene and/or cumene without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is not chemically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate.

Abstract: The present invention relates to a process for preparing bisphenol A in the presence of hydroxyacetone without poisoning the catalyst system comprising an ion exchange resin catalyst and a sulfur containing cocatalyst, wherein at least part of the sulfur containing cocatalyst is not chemically bound to the ion exchange resin catalyst. Moreover, the present invention provides a process for preparing polycarbonate and a composition comprising bisphenol A and at least one specific impurity which is formed in the production of bisphenol A.