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Electrowinning of Oxygen from Silicate Rocks.

Authors
Kesterke-DG
Source
NTIS: PB 205 645 :12 pages
Link
NIOSHTIC No.
10008828
Abstract
Research was conducted to determine the feasibility of extracting elemental oxygen from silicate-bearing melts by high-temperature electrolysis. The method was based on a modification of existing processes for electrowinning metals from their oxides dissolved in molten halide systems. Electrolyses were performed at temperatures ranging from 1,050 deg to 1,250 deg c in boron nitride cells that incorporated a silicon carbide cathode and an iridium anode. The electrolytes contained volcanic scoria as the oxygen source, plus mixtures of baf2 and lif as fluxing agents. Cell gases containing almost 14 volume-percent oxygen were obtained. The average anode current efficiency for several experiments of extended duration was calculated to be 55 percent. Cell design and operating conditions are described, and some of the problems associated with the process are discussed.
Publication Date
19710101
Document Type
IH; Report of Investigation;
Fiscal Year
1971
NTIS Accession No.
PB-205645
NTIS Price
A03
Identifying No.
RI 7587
NIOSH Division
RERC;
Source Name
NTIS: PB 205 645
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