Method and apparatus for the low-temperature fractionation of a fluid mixture

摘要

The method and the apparatus are used for the low-temperature fractionation of a fluid mixture. The fluid mixture is introduced into a separation column. At least a portion of the sump liquid from the separation column is introduced into a sump evaporator and at least partly evaporated there. At least a portion of the vapor produced in the sump evaporator is led back into a lower section of the separation column. A top product is removed at the top of the separation column, and a sump product is removed from the sump of the separation column or from the sump evaporator. The sump evaporator is operated by means of inductive heating.

主权项

1. A method for low-temperature fractionation of a fluid mixture comprising:
introducing said fluid mixture into a separation column to produce a top gaseous product and a bottom liquid, introducing at least part of said bottom liquid into a bottom evaporator wherein said bottom liquid is at least partially evaporated in said bottom evaporator to form a vapor, returning at least part of said vapor generated in the bottom evaporator to a lower portion of said separation column, removing said top gaseous product from the top of said separation column, and removing a bottom product from the bottom of said separation column or from said bottom evaporator, wherein said bottom evaporator is heated by inductive heating.