Patent ID: 6573408
Filing Date: 2003-06-03
Classification: B01J,C07C

Abstract:
A method fur removing impurities from a cumene hydroperoxide cleavage product mixture, comprising:extracting, at a pH of about 2 to about 10, impurities from a first cumene hydroperoxide cleavage product mixture with an aqueous phase; neutralizing the aqueous phase to form an aqueous salt phase; heating the aqueous salt phase containing the impurities at a temperature or about 150 to about 350Â° Celsius for a time sufficient to form water-soluble derivatives of the impurities; extracting impurities in a second cumene hydroperoxide cleavage product mixture with the aqueous salt phase containing the water-soluble derivatives; and separating, from the extracted second cumene hydroperoxide cleavage product mixture, the aqueous salt phase containing the water-soluble derivatives from the first product mixture and the extracted impurities from the second product mixture.