Hydride removal method for liquid metal heat exchange fluid in h

Details Hydride removal method for liquid metal heat exchange fluid in h Hydride removal method for liquid metal heat exchange fluid in h

1998-12-29

2000-07-11

Andrews, Melvyn

Specialized metallurgical processes, compositions for use therei

Processes

Producing or treating free metal

376312, 75414, C22B 900

Patent

active

060866543

ABSTRACT:
A method for purifying liquid metal heat exchange fluids uses a contacting drum in combination with purifiers to control metal hydride precipitation in a process with high hydrogen permeation. The contacting drum receives a slip stream of a circulating liquid metal stream and removes hydrogen from dissolved hydride by providing a high interfacial surface area and sufficient temperature for hydride decomposition under vacuum conditions. The liquid metal with a reduced hydride level may be returned to the circulating heat exchange stream or undergo further purification by hydride precipitation and filtration in a cold trap. The drum may be integrated with the cold traps to decompose re-dissolved hydride from a regenerant stream that dissolves precipitated hydride from the cold traps.

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