Recovery process

Details Recovery process Recovery process

1987-05-21

1989-10-03

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204151, B01D 1302

Patent

active

048714321

ABSTRACT:
A process for recovering a Group VIII noble metal catalyst, e.g. rhodium, from a liquid medium comprising Group VIII metal and a tar formed as a by-product in a carbonylation process is provided. The process comprises feeding the liquid medium to a first compartment of an electrodialysis cell and feeding a solvent to a second compartment adjacent the first. A voltage is applied to the electrodialysis cell to effect migration of the Group VIII metal from the first compartment to the second. The solvent used is preferably aqueous acetic acid.

REFERENCES:
patent: 3645891 (1972-02-01), Goldup et al.
patent: 4146455 (1979-03-01), McRae
patent: 4227981 (1980-10-01), Williams et al.
patent: 4414401 (1983-11-01), Wintermeyer et al.
patent: 4680098 (1987-07-01), Chang
"A Study of the Ionic Composition of Alcohol Solutions of Rhodium Complexes by Electrodialysis"-English Language Translation of the Russian Reference, Separation and Recovery of Noble Metals, Chemical Abstracts, vol. 94, 1982.

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