PURIFICATION OF PROPYLENE OXIDE

摘要

A process for purifying propylene oxide containing an unacceptable quantity of poly(propylene oxide) contaminant having a molecular weight of at least 50,000 which comprises contacting the so-contaminated propylene oxide with a quantity of a substantially calcined diatomaceous earth for a time and under conditions sufficient to reduce the amount of such contaminant in such propylene oxide to acceptable levels, and recovering the purified propylene oxide product. Also, processes for making polyether polyols from such purified propylene oxide products, and for making high resilient flexible polyurethane foams from such polyols.