-
公开(公告)号:US5286468A
公开(公告)日:1994-02-15
申请号:US658503
申请日:1991-02-21
申请人: Francis H. Chang , Harold K. Vogt , Leonard S. Krochmalnek , Savtantar K. Sood , Frank E. Bartoszek , Kenneth B. Woodall , Jeffrey R. Robins
发明人: Francis H. Chang , Harold K. Vogt , Leonard S. Krochmalnek , Savtantar K. Sood , Frank E. Bartoszek , Kenneth B. Woodall , Jeffrey R. Robins
CPC分类号: G21F9/02 , B01D3/322 , C01F11/188 , F25J3/08 , C01P2006/88 , F25J2205/20 , F25J2215/14 , F25J2220/90
摘要: A method for the recovery of carbon-14 (C-14) from a mixture of inert gas and carbon-12 (C-12), carbon-13 (C-13) and C-14 dioxides. The mixture is cooled to a temperature below the solidification point of carbon dioxide to obtain solid carbon dioxide. The solid carbon dioxide is volatilized to provide substantially pure carbon dioxide gas which is reduced to carbon monoxide gas by reaction with metal. The carbon monoxide gas is cooled to obtain liquefied carbon monoxide. A feed of the liquefied carbon monoxide is subjected to fractional distillation and a bottoms rich in C-14 monoxide and poor in C-12 monoxide is collected and a distillate poor in C-14 monoxide and rich in C-12 monoxide is removed. The bottoms are oxidized to carbon dioxide rich in C-14 dioxide which is absorbed in a metal hydroxide solution and a carbonate salt rich in C-14 is obtained.
摘要翻译: 从惰性气体和碳12(C-12),碳-13(C-13)和C-14二氧化物的混合物中回收碳-14(C-14)的方法。 将混合物冷却至低于二氧化碳凝固点的温度,得到固体二氧化碳。 固体二氧化碳挥发以提供基本上纯的二氧化碳气体,其通过与金属反应而还原成一氧化碳气体。 一氧化碳气体被冷却以获得液化的一氧化碳。 液化一氧化碳的进料进行分馏,收集富含C-14氧化碳和C-12氧化碳不足的塔底馏分,并且除去C-14氧化碳和富含C-12氧化物的馏出物不足。 底部氧化成富含C-14二氧化碳的二氧化碳,其被吸收在金属氢氧化物溶液中,并且获得富含C-14的碳酸盐。