Other Integrated HPPO Processes

An integrated process has also been reported, but not implemented at a commercial level, by ARCO (now Lyondell) [21]. In this case, the O-donor species is produced by the autoxidation of aryl-substituted secondary alcohols (a-methyl benzyl alcohol) to ketones, and the resulting solution is used to feed the epoxidation reactor. The alcohol is then recovered by hydrogenating the ketone. The main difference with respect to the EniChem process is the higher temperature of the autoxidation process (90-140 instead of 40 °C). 

The procedure described involves the initial preparation of the oxidant mixture (containing 5wt% HP, 1% H2O, 66% unconverted a-methylbenzyl alcohol, 28% acetophenone, plus minimal amounts of EBHP) by air oxidation of a-methylbenzyl 

---