Process for the electrocatalytic reducing dissolving of refracto

Details Process for the electrocatalytic reducing dissolving of refracto Process for the electrocatalytic reducing dissolving of refracto

1996-11-21

1998-11-03

Phasge, Arun S.

Electrolysis: processes, compositions used therein, and methods

Electrolytic material treatment

205766, 205767, C01C 118

Patent

active

058303421

ABSTRACT:
The invention relates to an electrocatalytic or aero-electrocatalytic process for the reducing dissolving of a refractory compound of cerium such as CeO.sub.2. According to this process, the compound to be dissolved is introduced into an aqueous acid solution, e.g. a sulphuric solution, containing an electrochemical carrier constituted by one of the reducing or oxidizing species of a redox pair, whose redox potential is below +1.25 V/SHE, e.g. a ferric salt, a uranyl salt, molecular iodine or oxygen, and continuous generation and/or regeneration takes place by electrolysis of the reducing species of said redox pair.

REFERENCES:
patent: 3812233 (1974-05-01), Duncan
patent: 4417965 (1983-11-01), Inoue
patent: 4869794 (1989-09-01), Koehly et al.
patent: 4908108 (1990-03-01), Horbez et al.
patent: 5420088 (1995-05-01), Silva et al.
patent: 5516972 (1996-05-01), Farmer et al.
WPI Accession No. 91-34813/32 & JP 3153520A (Sumitomo) no date available.
Gazz. Chim. Ital. 37(a), pp. 51-54 (1907), L. Marino no month available.

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