Process for the electrochemical recovery of bismuth from an ion

Details Process for the electrochemical recovery of bismuth from an ion Process for the electrochemical recovery of bismuth from an ion

1993-08-04

1995-01-03

Niebling, John

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

205232, 205261, 423 87, C25C 122

Patent

active

053783280

ABSTRACT:
A process is provided for the recovery of bismuth from an ion exchange eluent solution consisting of at least 50% sulfuric acid maintained at a temperature of 95.degree.-100.degree. C. The process comprises the step of electrowinning bismuth from the sulfuric acid solution in an electrochemical cell at a current density up to 30 A/m.sup.2 using an insoluble anode and a cathode that is impervious to the highly corrosive environment of hot sulfuric acid, for a time interval such as to reduce the bismuth content of the solution down to about 3-5 g/L.

REFERENCES:
patent: 1194438 (1916-08-01), Stevens
patent: 3491003 (1970-01-01), Baltisberger
patent: 4026776 (1977-05-01), Hirakawa et al.
patent: 5071819 (1991-12-01), Tarbet et al.
patent: 5084430 (1992-01-01), Tarbet et al.
Walker et al., "The Electrodeposition of Bismuth" in Metal Finishing Jun. 1980 pp. 79-83.

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