C - Chemistry – Metallurgy – 01 – B
Patent
C - Chemistry, Metallurgy
01
B
23/285
C01B 5/02 (2006.01) B01D 59/32 (2006.01) B01D 59/50 (2006.01) G21F 9/06 (2006.01)
Patent
CA 1113690
PROCESS FOR EXCHANGING HYDROGEN ISOTOPES BETWEEN GASEOUS HYDROGEN AND WATER ABSTRACT OF THE DISCLOSURE A process for exchanging isotopes of hydrogen, particu- larly tritium, between gaseous hydrogen and water is provided comprising: (a) (i) introducing hydrogen gas depleted in tritium and water in the vapor phase, said water containing tritium, into a first reaction zone, contacting in said zone in co-current flow at a temperature in the range of from about 225°C to about 300°C said water vapor and hydrogen gas with a supported metal catalyst, withdrawing from said zone an effluent stream comprising a mixture of hydrogen gas enriched in tritium and water vapor depleted in tritium, and condensing said water vapor to liquid water; or (a) (ii) introducing hydrogen gas depleted in tritium and liquid phase water, said water containing tritium, into a first reaction zone, contacting in said zone in counter-current flow at a temperature of about 100°C said liquid phase water and hydrogen gas with a hydrophobic catalyst comprising a coherent film of a hydrophobic polymer, said film being disposed on a low surface area support and containing at least one finely-divided catalytically active metal of Group VIII of the Periodic Table on a high surface area carrier and withdrawing from said first reaction zone a stream of hydrogen gas enriched in tritium and liquid water depleted in tritium; and (b) introducing said hydrogen gas enriched in tritium withdrawn from said first reaction zone and liquid water contain- ing tritium into a second reaction zone, contacting in said second reaction zone in counter-current flow at a temperature in the range from about 0°C to about 50°C said liquid water and said hydrogen gas enriched in tritium with a hydrophobic catalyst comprising a coherent film of a hydrophobic polymer, said film being disposed on a low surface area support and containing at least one finely divided catalytically active metal of Group VIII of the Periodic Table on a high surface area carrier, and withdrawing from said second reaction zone a liquid water effluent stream enriched in tritium and a hydrogen gas depleted in tritium. -2-
280483
Hindin Saul G.
Roberts George W.
Engelhard Minerals & Chemicals Corporation
Macrae & Co.
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