washing the stirring is stopped to separate two phases the lower phase aqueous u2014 63 8 g is removed via the bottom valve while resuming the stirring the upper phase organic is washed at 40 u00b0 c with 62 4 g of aqueous sodium hydroxide solution 15 wt after 5 minutes of washing the stirring is stopped to separate two phases the lower phase aqueous u2014 64 2 g is removed via the bottom valve the process is completed with a final wash at 40 u00b0 c of the upper phase organic with 60 7 g of water after 5 min of washing the stirring is stopped to separate two phases a lower phase aqueous 61 2 g and an upper phase organic 77 3 g are recovered after analysis the organic solution contains 41 2 g of u03b1 u03b1 u2032 bis tert butylperoxy diisopropylbenzene c 20 h 34 o 4 0 35 g of u03b1 tert butylperoxy u03b1 u2032 hydroxyisopropylbenzene c 16 h 26 o 3 and 0 43 g of u03b1 tert butylperoxy u03b1 u2032 isopropenylbenzene c 16 h 24 o 2 corresponding respectively to the sum of the meta and para isomers of each of the compounds this represents a yield of u03b1 u03b1.