Removal of mineral acid catalyst from cumene hydroperoxide...

Details Removal of mineral acid catalyst from cumene hydroperoxide... Removal of mineral acid catalyst from cumene hydroperoxide...

C - Chemistry, Metallurgy

07

C

260/624.9

C07C 37/68 (2006.01)

Patent

CA 1049045

The mineral acid catalyst is removed from the prod- ucts of cumene hydroperoxide cleavage by contact with an aqueous solution of an inorganic salt and an excess of an alkali metal hydroxide or phenate in a first zone. Suitably the aqueous solution contains so- dium sulphate and sodium hydroxide or phenate. The aqueous layer is removed and the organic layer con- tacted in a second zone with an aqueous solution com- prising an inorganic salt and sufficient weak acid to decompose any phenate carried over from the first zone. Suitable weak acids are oxalic and citric acids but the preferred acid is carbonic acid formed 'in situ' by passing carbondioxide into the aqueous inorganic salt solution.

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