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US 4,835,299 AGranted
Process for purifying tertiary organophosphites
AssigneeUnion Carbide Corporation
InventorsJohn M. Maher, Ernst Billig, David R. Bryant
Life of this patent
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Abstract
A process for purifying tertiary organophosphites by removing secondary organophosphites therefrom.
Claims22
A process for separating secondary organophosphite from tertiary organophosphite which comprises (1) treating a composition consisting essentially of tertiary and secondary organophosphites dissolved in an organic solvent, with added water and a Lewis base to selectively convert the secondary organophosphite to a primary organophosphite salt and (2) separating and recovering the tertiary organophosphite from said salt.
Dependencies are inferred from the claim text.