Purification of propylene oxide

Details Purification of propylene oxide Purification of propylene oxide

1992-12-10

1993-08-10

Evans, Joseph E.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

521189, 568679, C07D30132, C07D30304

Patent

active

052350754

ABSTRACT:
A process for purifying propylene oxide containing an unacceptable quantity of poly(propylene oxide) contaminant having a molecular weight of at least about 50,000, which comprises contacting the so-contaminated propylene oxide with a quantity of a substantially non-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.

REFERENCES:
patent: 4233202 (1980-11-01), Berger et al.
patent: 4692535 (1987-09-01), Larson et al.
"Diatomite", Kirk-Othmer Encyclopedia of Chemical Technology, vol. 7, pp. 603-614, 3rd ed., 1979.

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