3-isothiazolone biocide process

Details 3-isothiazolone biocide process 3-isothiazolone biocide process

C - Chemistry, Metallurgy

07

D

C07D 275/03 (2006.01)

Patent

CA 2145478

Process for producing substantially separated 5-chloro-2-methyl-3-isothiazolone (CMI) and 2-methyl-3-isothiazolone (MI) from a mixture of their hydrochloride salts, or in a special mixture having a higher ratio of CMI to MI, comprising heating a mixture of CMI?HCl and MI?HCl for a period of time necessary to fully dissociate said CMI?HCl and form substantially pure CMI, but insufficient to fully dissociate said MI?HCl.

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