Process for the purification of fluoromethyl...

Details Process for the purification of fluoromethyl... Process for the purification of fluoromethyl...

2007-12-27

2010-06-08

Keys, Rosalynd (Department: 1621)

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

Organic compounds

Oxygen containing

C568S683000

Reexamination Certificate

active

07732647

ABSTRACT:
A process for purifying crude fluoromethyl 1,1,1,3,3,3-hexafluoroisopropyl ether (sevoflurane). The crude sevoflurane is repeatedly washed with water under conditions and for a time sufficient to reduce the level of 1,1,1,3,3,3-hexafluoroisopropanol (HFIP) to no more than 200 ppm or no more than 100 ppm.

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