ApplicationNo. 06/883754 filed on 07/09/1986
US Classes:208/333, Oxy compound208/321, With solvent rehabilitation208/334, Ethers585/804, To recover aromatic585/868Inorganic O-containing agent
ExaminersPrimary: Caldarola, Glenn
Attorney, Agent or Firm
International ClassesC10G 21/00 (20060101)
C10G 21/16 (20060101)
AbstractThis invention relates to an improved more energy efficient process for the separation of aromatic and non-aromatic hydrocarbons from a mixed carbon feed which comprises the following steps:(a) contacting said feed in an extraction zone with an extraction solvent to provide an aromatic-rich solvent phase and a raffinate phase;(b) cooling said aromatic-rich solvent and raffinate phases;(c) introducing said cooled aromatic-rich solvent phase to a separation zone containing aromatic hydrocarbons and a solvent-rich phase containing mixed extraction solvent and water;(d) introducing said cooled raffinate phase to a separation zone in the presence of water as based on the total weight of water and the raffinate phase to provide a raffinate phase containing non-aromatic hydrocarbons and a solvent/water phase;(e) adjusting the water present in the solvent-rich phase of step (c) and the solvent/water phase of step (d);(f) recycling at least or portion the phases in step (e) to step (a);(g) separately contacting the raffinate of step (d) and the extract of step (c) with water to form two water phases and a raffinate product and an extract product;(h) combining the water phases of step (g);(i) recycling at least a portion of the combined water phase of step (h) to step (d).