Organic compounds -- part of the class 532-570 series – Organic compounds – Oxygen containing
Reexamination Certificate
2006-01-31
2006-01-31
Price, Elvis O. (Department: 1621)
Organic compounds -- part of the class 532-570 series
Organic compounds
Oxygen containing
C568S841000, C570S123000, C570S124000, C570S134000, C570S136000, C570S140000, C570S142000, C570S171000, C570S175000, C570S177000, C570S178000
Reexamination Certificate
active
06992229
ABSTRACT:
The present invention has an object to provide a method for purifying a fluorinated hydroxyl compound of the formula 1 safely in a high yield under industrially practical conditions. Namely, a mixture containing a fluorinated hydroxyl compound of Rf—CR1R2—OH (Formula 1, wherein Rfis a C1-20polyfluoroalkyl group, and each of R1and R2is a hydrogen atom or a C1-3alkyl group) such as 2,2,3,3-tetrafluoropropanol, and a compound having an unshared electron pair, is distilled by heating in the presence of a solid acid catalyst such as a cation exchange resin catalyst, or by adding a proton source such as water.
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Okamoto Hidekazu
Toma Toshihiko
Wada Akihiro
Yamagishi Nobuyuki
Asahi Glass Company Limited
Price Elvis O.
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