METHOD AND SYSTEM FOR OBTAINING ETHYLENE

The invention relates to a method (100, 200, 300) for obtaining ethylene, in which method a first feed gas (A) and a second feed gas (B) are fed to a reactor (1) and are processed therein to obtain a product mixture (C) by steam cracking. The first feed gas (A) contains more than 90 wt.% of saturated hydrocarbons and more than 80 wt.% of ethane, wherein the product mixture (C), or a part thereof, is subjected to a treatment (2, 3, 4), thus obtaining a subsequent mixture (F), which contains hydrogen, methane, ethane, ethylene, and hydrocarbons having three, four, and at least five carbon atoms, and the subsequent mixture (F), or a part thereof, is subjected to a separation (10). According to the invention, the separation (10) comprises an ethylene separation step (7), to which at least the ethane, the ethylene, and the hydrocarbons having three carbon atoms from the subsequent mixture (F), or a part thereof, are fed in a manner not separated from one another in a common separating insert (S, V, X), wherein a l