| 摘要 |
<p>1468408 Enriching hydrogen with deuterium SULZER BROS Ltd 1 May 1974 [24 May 1973] 19125/74 Heading C1A A process for enriching hydrogen with deuterium comprises contacting hydrogen with heated fresh water having a natural deuterium content in the presence of a first isotope exchange catalyst, e.g. NaOH or KOH, heating the resulting hydrogen/steam mixture to superheat the steam and then contacting the mixture thus formed with a second isotopic exchange catalyst, e.g. Pt or Ni. In the preferred embodiment, purified and de-gassed water is passed to a countercurrent isotope exchange column 5 via heat exchanger 2. D-depleted water from column 5 is withdrawn via the heat exchanger 2. D-depleted dry hydrogen from a heavy water recovery plant is passed to the column 5 via heat exchangers 9 and 10. Water separated from the H 2 -steam mixture flowing through the heat exchangers 9, 10 in an opposite direction is added to the hydrogen via conduits 36, 38. The heated, wetted H 2 contacts the water in the column 5. The D-enriched H 2 and water vapour from column 5 are passed to a heat exchanger 11 where the steam is super-heated. The mixture is then further heated in a heater 12 and passed to a reactor which operates at a temperature between 400‹ and 600‹ C. and a pressure of 100 to 400 atmospheres. The mixture leaving the reactor is cooled by passage through heat exchangers 11, 10 and 9 respectively. Steam is condensed out 14, 16 and recycled. The enriched hydrogen is withdrawn via conduit 39 and fed to a heavy water recovery plant.</p> |
