Processes for recovery of a triarylphosphine from a group...

Details Processes for recovery of a triarylphosphine from a group... Processes for recovery of a triarylphosphine from a group...

2005-04-21

2010-02-23

Sullivan, Daniel M (Department: 1621)

Organic compounds -- part of the class 532-570 series

Organic compounds

Phosphorus containing

Reexamination Certificate

active

07667079

ABSTRACT:
Processes for recovering at least one triarylphosphine from a Group VIII metal catalyst triarylphosphine complex mixture are provided. The processes are particularly useful for recovering the triarylphosphine from spent Group VIII metal catalyst complex mixtures. The processes include the steps of (i) forming a distillate from a Group VIII catalyst complex mixture containing a Group VIII metal catalyst complex, a triarylphosphine, and a light ends component wherein the distillate contains at least a portion of the triarylphosphine as a vapor and at least a portion of the light ends component as a vapor; (ii) cooling the distillate to a temperature below the boiling point of the light ends component to form a condensate; (iii) crystallizing at least a portion of the triarylphosphine using the light ends component as a crystallizing liquid; and (v) recovering the crystallized triarylphosphine from the condensate.

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Ullmann's Encyclopedia of Industrial Chemistry, M. Bohnet et al., Jan. 15, 2003, Wiley-Vch Verlag GmbH & Co. KGAA, pp. 1-51.

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