Process for silver cathode activation

Details Process for silver cathode activation Process for silver cathode activation

1986-07-11

1988-07-05

Niebling, John F.

Chemistry: electrical and wave energy

Processes and products

Electrostatic field or electrical discharge

204 73R, 204292, 134 2, 423604, C25F 100

Patent

active

047552662

ABSTRACT:
Silver cathodes used in electrochemical synthesis are activated or reactivated after a period of use by immersion in a dilute alkaline aqueous solution of a compatible oxidizing agent. Thus, an expanded silver sheet cathode in an electrolytic cell used for the conversion of 3,4,5,6-tetrachloropicolinic acid to the herbicide 3,6-dichloropicolinic acid was reactivated by circulating an aqueous solution containing about 0.5 percent sodium hypochlorite and about 2 percent sodium hydroxide through the cell.

REFERENCES:
patent: 3253961 (1966-05-01), Jung et al.
patent: 4003757 (1977-01-01), Lux et al.
patent: 4217185 (1980-08-01), Kyriacou et al.
patent: 4242183 (1980-12-01), Kyriacou et al.
patent: 4460441 (1984-07-01), Domning
Hackh's Chemical Dictionary, 1969, McGraw-Hill Inc. p. 481, "Oxidizing".

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