Method and device for producing a krypton/xenon mixture

A method of producing a krypton/xenon concentrate, comprising:

• purification of a stream of a gaseous primary concentrate using its catalytic combustion and a subsequent cooling, purification front catalytic combustion products, cooling after the purification from the catalytic combustion products, fractionation in a rectification column followed by a formation of a krypton/xenon mixture stream and a stripped oxygen stream and withdrawal of said krypton/xenon mixture stream as a target product from the rectification column, as well as purification of the krypton/xenon mixture from radon characterized by a fact that the stream of the gaseous primary concentrate is formed from a liquid primary concentrate, supplied from its sources by way of pouring the liquid primary concentrate into a storage tank with the subsequent feeding from it under pressure to a vapor heat exchanger for evaporation using a water vapor and formation of the gaseous primary concentrate;
• the pressure, under which the liquid primary concentrate is fed to the vapor heat exchanger, is set to a value sufficient for conducting subsequent steps for producing the target product;
• liquid nitrogen is used as a refrigerant for fractionation in the rectification column, and purification of the krypton/xenon mixture from radon is carried out at its exit from the rectification column.