Separation of propylene oxide from a mixture comprising...

Details Separation of propylene oxide from a mixture comprising... Separation of propylene oxide from a mixture comprising...

2008-01-29

2008-01-29

Seaman, D. Margaret (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S538000, C203S053000, C203S054000, C203S057000, C203S058000

Reexamination Certificate

active

07323579

ABSTRACT:
A method of separating propylene oxide from a mixture (M) comprising 5 to 50 percent by weight propylene oxide and 50 to 85 percent by weight methanol, said method comprising(i) introducing said mixture (M) into an extractive distillation column;(ii) additionally introducing a polar solvent into said extractive distillation column;(iii) distilling propylene oxide overhead from said extractive distillation column at a bottoms temperature of from 40 to 70° C. and at a pressure of from 300 to 750 mbar.

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patent: 1 424 332 (2004-06-01), None

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