Abstract: The invention concerns a method and a device for purifying a gas containing hydrogen isotopes, and for recovering the different isotopes, in particular for treating a gas coming from a thermonuclear fusion reactor. According to the invention, the gas is firstly dried in a water and CO.sub.2 adsorption stage (2), the dried gas then passes through a stage (3) in which a selective adsorption of sulphur compounds takes place and finally, the gas leaving this stage, which still contains at least some of the compounds (H,D,T).sub.2, N.sub.2, O.sub.2, CO, C(H,D,T).sub.4, is processed in a hydrogen adsorption/separation stage (4) of the zeolite type.

Abstract: Separator film for alkaline electrolysis and method for making thereof, wherein said separator film includes an aromatic polymer and polytitanic acid.

Abstract: A process for removing helium and other impurities from a mixture containing deuterium and tritium, which process comprises the following steps: separating the isotopes of hydrogen from the impurity by catalytic oxidation; condensing out the oxides H.sub.2 O, D.sub.2 O and T.sub.2 O thus formed; separating by electrolysis a portion of the said oxides in an electrolytic cell in order to produce a protium-rich portion; distillating the protium-rich portion to separate deuterium and tritium oxides from a distillate rich in water; and electrolyzing the condensate of the distillation step and the non-electrolyzed portion of the first electrolyzing step in order to form a mixture of deuterium and tritium.Preferably the impure mixture of deuterium and tritium is a waste product of a fusion reactor and the purified deuterium-tritium mixture is recycled to the reactor.

Abstract: A process for removing helium and other impurities from a mixture containing deuterium and tritium, which process comprises the steps of: separating from the mixture isotopes of hydrogen in any of their diatomic combined forms; oxidizing the separated isotopes to their corresponding oxides; separating tritium oxide and deuterium-tritium oxide from the oxides thus formed; and electrolyzing the separated oxides to deuterium and tritium.Preferably the impure mixture of deuterium and tritium is a waste product of a fusion reactor, and the purified deuterium/tritium mixture is recycled to the reactor.