Method for extraction of dihydroperoxide

C - Chemistry – Metallurgy – 07 – C

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260/649.5

C07C 407/00 (2006.01)

Patent

CA 1056407

ABSTRACT OF THE DISCLOSURE The present invention provides a method for extracting a dihydroperoxide of a dialkylbenzene of the formula, Image wherein each R1, R2, R3 and R4 is independently isopropyl or sec butyl, from an aqueous alkali solution of the said dihydro- peroxide with at least one organic solvent selected from the groups consisting of C4-C10 ketones, C4-C10 ethers and C4-C8 alcohols, which comprises extracting the dihydroperoxide by a countercurrent multi-stage extraction with a temperature gradient between each stage and with all of the extractions being conducted at a temperature of from 0° to 85°C, the aqueous alkali solution being fed to the lower temperature zone, the organic solvent being fed to the higher temperature zone with said lower temperature being from 0° to 50°C, and said higher temperature being from 50° to 85°C, 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.

234541

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