| 摘要 |
<p>The invention concerns a method comprising cooling the initial natural gas (13)and introducing same into a C2+ hydrocarbon recovery column (35).It comprises recovering the overhead stream (131) of the column (35) to form thetreated natural gas (15), and recovering the bottoms stream (171) of the column(35) to introduce same at a supply level (P1) of the fractionating column (61)provided with an overhead condenser (63). The column (61) produces in the bottomssaid C3+ hydrocarbon cut (17). The method comprises recovering theethane-rich stream (19) from the intermediate level (P2) of the column (61),located above said supply level (P1) and the production of a secondary refluxstream (191) from said overhead condenser (63) introduced in reflux into therecovery column (35).</p> |
