Process and installation for the separation of a mixture cooled under pressure, which contains methane and C2 and higher hydrocarbons.In a final light fraction enriched in methane and a fraction enriched in heavy end C2 hydrocarbons and higher, and gas.

摘要

Process and installation for separation of a mixture cooled under pressure, which contains methane and hydrocarbons (C ~ 2 ~ and above.In a final light fraction enriched in methane and a fraction enriched in heavy hydrocarbon end C ~ 2 ~ and above, and gas.Process and installation for the separation of a gas mixture and gas obtained by this installation.The present invention relates to a process and an installation for cryogenic separation of constituents of a natural gas under pressure (14) by a first separator stages (B1) which providedIntes of each of the phases are separated in a distillation column (C1). A portion of the gaseous fraction (5) from the top of the column (C1) is recycled in the last stage of the last.The process comprises, on the other hand, the derivation of (9) of a part of a first fraction of top (3) from the first separator stage.The process comprises, in addition, the separation of a first fraction of the Fund (4) from the first separator, a second separator (B2). Other ways of realization are also described.