Methods for preparing halohydrins and methods for preparing...

Details Methods for preparing halohydrins and methods for preparing... Methods for preparing halohydrins and methods for preparing...

2007-06-01

2008-11-25

Price, Elvis O. (Department: 1621)

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

Organic compounds

Oxygen containing

C568S841000

Reexamination Certificate

active

07456324

ABSTRACT:
The invention includes methods for preparing halohydrins and epoxides. A method of preparing halohydrins can include exposing (R1CHXCH2O—)2SO2to R2COOH to produce R1CHXCH2COOR2and hydrolyzing the R1CHXCH2COOR2to produce the halohydrin R1CHXCH2OH. R1and R2can be the same or different single elements and/or organic groups and X can be a halogen. A method of preparing an epoxide can include combining a sulfuric acid containing solution with a halogen to produce a first mixture and exposing the first mixture to trifluoropropene to produce a second mixture. The second mixture can be combined with acetic acid to produce an acetyl halohydrin of trifluoropropene and the acetyl halohydrin can be hydrolyzed to form a halohydrin of trifluoropropene. The halohydrin can be converted to a trifluoropropyl epoxide.

REFERENCES:
patent: 2700686 (1955-01-01), Dickey et al.
patent: 2768160 (1956-10-01), Dickey et al.
patent: WO 91/09010 (1991-06-01), None

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