Isolation of triphenylphosphine

Details Isolation of triphenylphosphine Isolation of triphenylphosphine

1994-08-03

1996-01-02

Reamer, James H.

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

Organic compounds

Phosphorus containing

C07F 950

Patent

active

054810418

ABSTRACT:
A process for isolating triphenylphosphine (TPP) from a triphenylphosphine/aluminum chloride complex dissolved in chlorobenzene by decomplexation, hydrolysis and extraction using water and subsequent separation of the liquid/liquid dispersion, which is composed of a TPP-containing chlorobenzene phase and of an containing Al and Cl compounds aqueous phase, into a TPP-containing chlorobenzene phase and into a TPP-free, aqueous phase, containing Al and Cl compounds, wherein
water is dispersed in the chlorobenzene phase in a ratio of 0.6-0.95 kg of water per kg of chlorobenzene solution in a 1st mixing apparatus in such a way that the temperature resulting from the hydrolysis is in the range from 60.degree. to 90.degree. C., the dispersion being carried out with residence times of 5-30 minutes and energy densities of 2-10 kW/m.sup.3,
a second dispersion is carried out in a 2nd mixing apparatus with residence times of 5-60 minutes and energy densities of 0.05-0.5 kW/m.sup.3, and
the heavier TPP-containing chlorobenzene phase is separated from the lighter TPP-free, aqueous phase containing Al and Cl compounds in a phase separator.

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Chemical Engineering Series, Liquid Extraction, 1951, pp. 273-301, R. E. Freybal.
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Ein Beitrag Zur Tropfenabscheidung . . . , F. Rebelein, pp. 1-3 (1988).
Chem.-Ing.-Tech. 61 (1989) Nr. 8, S. 597-610, E. Blass et al.

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