Verfahren zur Rueckgewinnung von Jod

摘要

1,164,691. Methacrylates. BADISCHE ANILIN- & SODA-FABRIK A.G. 6 Jan., 1967 [8 Jan., 1966], No. 928/67. Heading C2C. [Also in Division C1] In a process for the preparation of methacrylates by the oxidative dehydrogenation of an isobutyrate ester in the presence of an iodine catalyst the iodine is recovered by oxidizing at 700‹ to 1000‹ C., the organic phase of the reaction mixture containing iodine which is obtained by fractional distillation, scrubbing the flue gas with aqueous potassium iodide and extracting the resulting solution with isobutyrate ester. The iodine in the aqueous phase may also be recovered as above or by conventional methods. The solution of iodine in isobutyrate may be recycled to the oxidative dehydrogenation process.