Patent ID: 7084089

Claim:
A process for the separation of symmetrical phosphabicycloalkane from a composition containing symmetrical and asymmetrical phosphabicycloalkanes comprising: a) adding a source to protonate said composition containing symmetrical phosphabicycloalkane (SPBA) and asymmetrical phosphabicycloalkane (APSA), thereby providing a composition comprising protonated symmetrical phosphabicycloalkane (SPBA+) and non-protonated asymmetrical phosphabicycloalkane (APBA); wherein said source to protonate is an acid; b) separating protonated symmetrical phosphabicycloalkane (SPBA+) and non-protonated asymmetrical phosphabicycloalkane (APSA), thereby providing separated protonated symmetrical phosphabicycloalkane (SPBA+) and separated non-protonated asymmetrical phosphabicycloalkane (APBA); and c) adding a source to de-protonate the separated protonated symmetrical phosphabicycloalkane (SPBA+), thereby providing separated symmetrical phosphabicycloalkane (SPBA); wherein said source to de-protonate is a base.