Method for extraction of dihydroperoxide

摘要

A method for extracting a dihydroperoxide of a dialkylbenzene of the formula, <IMAGE> wherein each R1, R2, R3 and R4 is independently a lower alkyl group, from an aqueous alkali solution of the said dihydroperoxide with at least one organic solvent selected from the group consisting of C4-C10 ketones, C4-C10 ethers and C4-C8 alcohols, which comprises extracting the dihydroperoxide by a countercurrent multi-stage extraction at a temperature between 0 DEG and 85 DEG C with a temperature gradient, the aqueous alkali solution being fed to the lower temperature zone, the organic solvent being fed to the higher temperature zone, and each aqueous alkali solution and organic solvent being fed countercurrently, whereby the dihydroperoxide is obtained in the form of organic solvent solution from the lower temperature zone.