PROCESS FOR PRODUCING DODECANEDIOIC ACID DIMETHYL ESTERS

摘要

1451293 Dimethyl ester of dodecanedioic acid OKAMURA OIL MILL Ltd and S TSUTSUMI 23 Dec 1974 [24 Dec 1974] 55591/74 Heading C2C Dodecanedioic dimethyl ester is prepared by reacting cyclohexanone with methanol and hydrogen peroxide in the presence of an acid catalyst and water, dimerising the resultant methoxycyclohexyl peroxide in the presence of a ferrous salt and methanol, and separating the ester. 15 to 36 moles of methanol and 0À5 to 1À5 moles of hydrogen peroxide per mole of cyclohexanone are used in the first stage and at least 25 moles of methanol per mole of cyclohexanone are used in the second stage.