C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
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
Dohgane Iwao
Hosaka Hirokazu
Okabe Hiromichi
Tanaka Kunihiko
Tanimoto Kenji
Na
Sumitomo Chemical Company
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