Recovery of aliphatic hydrocarbons

The invention relates to a process for recovering aliphatic hydrocarbons from a liquid stream comprising aliphatic hydrocarbons, heteroatom-containing organic compounds and optionally aromatic hydrocarbons, involving a) contacting the liquid stream with a stream having a pH higher than 7 and comprising a washing solvent, before and/or after this, with a stream having a pH lower than 7 and comprising a washing solvent; b) subjecting the washed stream to liquid-liquid extraction with an extraction solvent. Furthermore, the present invention relates to a process for recovering aliphatic hydrocarbons from plastics, comprising the above-mentioned process; the present invention relates to a process for steam cracking a hydrocarbon feed comprising aliphatic hydrocarbons recovered in one of the above-mentioned processes, and to a process for steam cracking a hydrocarbon feed comprising aliphatic hydrocarbons recovered in one of the above-mentioned processes. 本发明涉及一种用于从包含脂族烃、含杂原子的有机化合物和任选的芳族烃的液体料流中回收脂族烃的方法，该方法涉及a)使该液体