Separation process

Details Separation process Separation process

2006-08-01

2006-08-01

Tsang, Cecilia J. (Department: 1625)

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

C549S542000

Reexamination Certificate

active

07084284

ABSTRACT:
Phosphine and/or phosphine oxide promoters are effectively separated from propylene oxide reaction solvents through use of a membrane effective to retain the phosphine and/or phosphine oxide.

REFERENCES:
patent: 5248794 (1993-09-01), Chappell et al.
patent: 5440058 (1995-08-01), Hoffman et al.
patent: 5681473 (1997-10-01), Miller et al.
patent: 6005123 (1999-12-01), Dessau et al.
Kirk-Othmer Encyclopedia of Chemical Technology 4th Edition, vol. 16, pp. 137-153.

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