The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 07, 1976
Filed:
Apr. 30, 1975
Nathan Dean Lee, Lambertville, NJ (US);
FMC Corporation, Philadelphia, PA (US);
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.