Removal of propylene glycol and/or propylene glycol ethers...

Details Removal of propylene glycol and/or propylene glycol ethers... Removal of propylene glycol and/or propylene glycol ethers...

2006-02-21

2006-02-21

Manoharan, Virginia (Department: 1764)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C568S672000, C568S852000

Reexamination Certificate

active

07002026

ABSTRACT:
An aqueous stream containing propylene glycol and/or ethers thereof is treated by counter current liquid—liquid extraction with propylene and/or propane to separate the propylene glycol and/or ether from the aqueous stream.

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patent: 1 095 433 (1960-12-01), None
patent: 1 554 016 (1969-01-01), None

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