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

C - Chemistry, Metallurgy

07

D

260/373, 202/84

C07D 313/04 (2006.01) C07D 315/00 (2006.01)

Patent

CA 1153006

ABSTRACT OF THE DISCLOSURE The invention relates to a process for the production of .epsilon.-caprolactone having a purity of 99.9% and increased colour 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 use- ful as an intermediate for the production of known useful compounds such as polyesterols which are subsequently converted to polyurethanes.

359001

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