Process for the manufacture of very pure .epsilon.-caprolactone

Details Process for the manufacture of very pure .epsilon.-caprolactone Process for the manufacture of very pure .epsilon.-caprolactone

1980-08-20

1982-02-02

Ford, John M.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

203 71, 203 73, 203 78, 203 80, C07D31304

Patent

active

043138799

ABSTRACT:
The invention relates to a process for the production of .epsilon.-caprolactone having a purity of 99.9% and increased color and storage stability which comprises feeding .epsilon.-caprolactone, which has been made by reacting cyclohexanone with a solution of a percarboxylic acid, into a first distillation unit, operating at 0.1 to 500 mbars and drawing off as the top product a mixture consisting of .epsilon.-caprolactone and lower-boiling impurities, feeding the bottom product of said first distillation unit into a second distillation unit, operating at 0.1 to 500 mbars and then drawing off the pure .epsilon.-caprolactone as the top product. The .epsilon.-caprolactone is useful as an intermediate for the production of known useful compounds such as polyesterols which are subsequently converted to polyurethanes.

REFERENCES:
patent: 2875138 (1959-02-01), Altreuter et al.
patent: 3064008 (1962-11-01), Phillips et al.
patent: 3517033 (1970-06-01), Weiberg
patent: 3881996 (1975-05-01), Schmidt
Starcher et al., J. A. C. S. 1958, pp. 4079-4081.

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