Process for recovery of rhodium values and triphenylphosphine fr

Details Process for recovery of rhodium values and triphenylphosphine fr Process for recovery of rhodium values and triphenylphosphine fr

1979-07-26

1980-12-30

Lone, Werren B.

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

Organic compounds

Oxygen containing

C07C 4550

Patent

active

042422841

ABSTRACT:
A hydroformylation process is disclosed utilizing a rhodium complex catalyst and an excess of a triorganophosphine wherein active rhodium catalyst and triorganophosphine can be separated from inactive rhodium, "heavies" and triorganophosphine oxide in partially deactivated reaction medium by extraction into concentrated phosphoric acid or aqueous solutions containing at least 40% by weight phosphoric acid. By neutralization of the phosphoric acid extract in the presence of organic solvent, e.g. aldehyde trimers, a solution of active rhodium catalyst and triorganophosphine can be produced that is suitable for re-use in the hydroformylation reaction.

REFERENCES:
patent: 3527809 (1970-09-01), Pruett et al.
patent: 3547964 (1970-12-01), Olivier
patent: 3641076 (1972-02-01), Booth
patent: 3857895 (1974-12-01), Booth
patent: 4113754 (1978-09-01), Kummer et al.
"Elements of Physical Chemistry" 2nd. ed. Glasstone and Lewis pp. 520-527 (52b).

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