Method of purifying triaryl phosphate

Details Method of purifying triaryl phosphate Method of purifying triaryl phosphate

C - Chemistry, Metallurgy

07

F

260/496.2

C07F 9/12 (2006.01) C07F 9/02 (2006.01)

Patent

CA 1105047

ABSTRACT OF THE DISCLOSURE A method of purifying triaryl phosphate to be used as electrical insulating oil, comprising a first step of washing the phosphate with the aqueous solution of alkali, a second step of diluting the phosphate with aromatic insulating oil, a third step of treating the diluted phosphate with acid clay in an atmosphere of dry gas so that the acid clay adsorbs the impurities in the phosphate and a fourth step of treating the phosphate under reduced pressure for removal of any remain- ing impurities therefrom. : 1-

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