Method and apparatus for regenerating cold traps within liquid-m

Details Method and apparatus for regenerating cold traps within liquid-m Method and apparatus for regenerating cold traps within liquid-m

1975-05-29

1976-03-02

Andrews, M. J.

Specialized metallurgical processes, compositions for use therei

Processes

Electrothermic processes

55387, 176 37, 210 85, 423461, C22B 2700

Patent

active

039415864

ABSTRACT:
Oxide and hydride impurities of a liquid metal such as sodium are removed from a cold trap by heating to a temperature at which the metal hydroxide is stable in a molten state. The partial pressure of hydrogen within the system is measured to determine if excess hydride or oxide is present. Excess hydride is removed by venting hydrogen gas while excess oxide can be converted to molten hydroxide through the addition of hydrogen. The resulting, molten hydroxide is drained from the trap which is then returned to service at cold trap temperatures within the liquid-metal system.

REFERENCES:
patent: 3618770 (1971-11-01), Pohl
patent: 3622303 (1971-11-01), Hill
patent: 3831912 (1974-08-01), Shimoyashiki et al.
patent: 3854933 (1974-12-01), Furukawa

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