초록 ▼

The invention relates to a method and an apparatus for cryogenic fractionation of a gaseous feed comprising a contact purifying-refrigerating column into the bottom of which is injected a partially condensed gaseous feed, the said column producing in its head portion a residual gas and in its bottom

The invention relates to a method and an apparatus for cryogenic fractionation of a gaseous feed comprising a contact purifying-refrigerating column into the bottom of which is injected a partially condensed gaseous feed, the said column producing in its head portion a residual gas and in its bottom portion a liquid which is injected into a fractionating column producing in its head portion a distillate which is at least partially condensed and injected into the head portion of the column to thus recover in the bottom liquid of this column the heavy compounds contained in the vaporized fraction of the gaseous feed.

대표청구항 ▼

A method of cryogenic fractionation of a gaseous feed into a residual gas containing the most volatile compounds of the feed and into a liquid product containing the heaviest compounds of the feed, comprising the steps of: injecting said feed in a partially condensed state into the bottom portion of

A method of cryogenic fractionation of a gaseous feed into a residual gas containing the most volatile compounds of the feed and into a liquid product containing the heaviest compounds of the feed, comprising the steps of: injecting said feed in a partially condensed state into the bottom portion of a contact purifying-refrigerating column, which column produces in its head portion at least some of said residual gas, and in its bottom portion, a liquid; withdrawing said liquid from said contact purifying-refrigerating column and injecting said liquid into a fractionating column to obtain in the bottom portion thereof a liquid product containing the heaviest compounds of the feed, and in the head portion thereof, a distillate; withdrawing said distillate from said fractionation column, and partially condensing and injecting said distillate as head supply into the said purifying-refrigerating column and recovering from the bottom of the fractionating column a liquid containing the heavy compounds contained in the vaporized fraction of a gaseous feed.