HPPO process scheme total scope | Source: Bassler P. et al. (2010)

The BASF-Dow HPPO process produces propylene oxide (PO) by direct liquid-phase epoxidation of propylene with hydrogen peroxide in methanol solvent over a proprietary TS-1 zeolite catalyst. The only raw materials are propylene and hydrogen peroxide; the sole stoichiometric by-product is water (~300 kg per tonne PO). This eliminates the co-product management burden that characterizes all older PO routes.

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