Patent ID: 9546815
Date: 2017-01-17
CPC Classifications: F25J

Claim:
1. A device for the cryogenic distillation of a gas mixture, the device comprising: a purification unit configured to purify the gas mixture in a system based on several bottles of adsorbent, wherein the purification unit operates according to a cycle comprising a pressurization phase, a system of columns, said system of columns comprising a medium pressure (MP) column, a lower pressure (LP) column, and an argon (AR) column; a tank configured to hold a cryogenic liquid; wherein the device is configured to send the cryogenic liquid to the tank solely outside of the pressurization phase, wherein the device is configured to send vaporized liquid from the tank to the MP column of the system solely during at least one part of a period in which one of the bottles is in the pressurization phase, a reboiler disposed in the tank, the reboiler configured to vaporize the cryogenic liquid contained within the tank; a conduit for sending a warming gas to the reboiler; and a second conduit for withdrawing liquid from the tank.