abstract |
The invention relates to a process for the recovery of aliphatic hydrocarbons from a liquid stream comprising aliphatic hydrocarbons, heteroatom containing organic compounds and optionally aromatic hydrocarbons, involving (i) membrane separation of said liquid stream into a permeate stream, which is either (i) an aliphatic hydrocarbons-rich stream or (ii) a contaminant-rich stream, and a retentate stream comprising aliphatic hydrocarbons, heteroatom containing organic compounds and optionally aromatic hydrocarbons; and a) liquid-liquid extraction of at least part of the retentate stream with an extraction solvent a) to remove heteroatom containing organic compounds and optional aromatic hydrocarbons. Further, the invention relates to a process for the recovery of aliphatic hydrocarbons from plastics comprising the above-mentioned process; and to a process for steam cracking a hydrocarbon feed comprising aliphatic hydrocarbons as recovered in one of the above-mentioned processes. |