Process for purifying trioctyl phosphate and use therefor

Details Process for purifying trioctyl phosphate and use therefor Process for purifying trioctyl phosphate and use therefor

1975-04-30

1976-12-07

Vertiz, Oscar R.

Chemistry of inorganic compounds

Oxygen or compound thereof

Peroxide

260990, C01B 1502, C07F 902

Patent

active

039963411

ABSTRACT:
Process for purifying trioctyl phosphate containing emulsifier impurities comprising alkali metal salts of dioctyl phosphoric acid and monooctyl phosphoric acid by contacting the trioctyl phosphate with a mineral acid to neutralize the emulsifier impurities and to provide a two-phase system having an organic phase and an aqueous phase wherein the pH value of the aqueous phase is below 3.0, separating the organic phase from the aqueous phase, dehydrating the organic phase, and removing neutralized impurities by absorption on an absorbent material leaving a substantially pure trioctyl phosphate having an interfacial tension of about 18 to about 24 dynes/cm. The purified trioctyl phosphate has exceptional utility as a solvent in the anthraquinone process for producing hydrogen peroxide.

REFERENCES:
patent: 2537655 (1951-01-01), Dawsey et al.
patent: 2573658 (1951-10-01), Weesner
patent: 2818420 (1957-12-01), Dejonge
patent: 3328128 (1967-06-01), Kabisch
patent: 3649721 (1972-03-01), Burrous et al.
patent: 3706823 (1972-12-01), Rampy et al.

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