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Electrowinning of Oxygen from Silicate Rocks.

PB205645

Publication Date	1971
Personal Author	Kesterke, D. G.
Page Count	17
Abstract	Research was conducted to determine the feasibility of extracting free oxygen from silicate-bearing melts using a method 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 to 1,250C 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 analyzing almost 14 volume-percent oxygen were obtained. Cell design and operating conditions are described, and some of the problems associated with the process are discussed. (Author)
Keywords	Silicate minerals Electrolysis Oxygen Electrowinning Lunar rock Molten salt electrolytes Gasification Electrolytic cells Fluorides Design Fluxes
Source Agency	Invalid Source Agency Code
NTIS Subject Category	54A - Astrogeology
Corporate Authors	Bureau of Mines, Reno, Nev. Reno Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of Investigations.
NTIS Issue Number	197205

Electrowinning of Oxygen from Silicate Rocks.

Electrowinning of Oxygen from Silicate Rocks.
PB205645

Publication Date	1971
Personal Author	Kesterke, D. G.
Page Count	17
Abstract	Research was conducted to determine the feasibility of extracting free oxygen from silicate-bearing melts using a method 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 to 1,250C 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 analyzing almost 14 volume-percent oxygen were obtained. Cell design and operating conditions are described, and some of the problems associated with the process are discussed. (Author)
Keywords	Silicate minerals Electrolysis Oxygen Electrowinning Lunar rock Molten salt electrolytes Gasification Electrolytic cells Fluorides Design Fluxes
Source Agency	Invalid Source Agency Code
NTIS Subject Category	54A - Astrogeology
Corporate Authors	Bureau of Mines, Reno, Nev. Reno Metallurgy Research Center.
Document Type	Technical Report
Title Note	Rept. of Investigations.
NTIS Issue Number	197205