Process for the recovery of rhodium from the residues of distill

Details Process for the recovery of rhodium from the residues of distill Process for the recovery of rhodium from the residues of distill

1991-08-07

1992-09-29

Prescott, Arthur G.

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

Organic compounds

Heavy metal containing

556 13, B01J 3140, C07C 4550, C07C 4702

Patent

active

051515377

ABSTRACT:
The recovery of rhodium, present as a homogeneous dissolved complex compound especially in residues of products of the oxo process, is carried out in a two-stage process. In the first stage, the residues are treated with a gas-containing oxygen in the presence of a C.sub.2 - to C.sub.4 - monocarboxylic acid and an alkali metal salt of a C.sub.2 - to C.sub.4 -monocarboxylic acid, and are then extracted with water. In the second reaction stage, they are treated again with a gas-containing oxygen, an aldehyde, a C.sub.2 - to C.sub.4 -monocarboxylic acid, and an alkali metal salt of a C.sub.2 to C.sub.4 monocarboxylic acid, and are extracted once more with water.

REFERENCES:
patent: 4390473 (1983-06-01), Cooper
patent: 4612402 (1986-09-01), Muccigrosso et al.
patent: 4904808 (1990-02-01), Devon et al.
patent: 5099047 (1992-03-01), Sato et al.
patent: 5099048 (1992-03-01), Brookhart et al.

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