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    • 10. 发明授权
    • Methods for removing heavy hydrocarbons from extractive solvents
    • 从萃取溶剂中除去重质烃的方法
    • US08680358B1
    • 2014-03-25
    • US13779704
    • 2013-02-27
    • AMT International, Inc.
    • Fu-Ming LeeTzong-Bin LinKuang-Yeu WuJyh-Haur HwangTsung-Min ChiuCiputra JapYung-Sheng Ho
    • C07C7/10
    • C10G21/00B01D11/0488B01D11/0492C10G7/08C10G21/27C10G21/28C10G53/16C10G2300/44
    • A method for cross connecting the lean solvent supply lines between the liquid liquid extraction (LLE) and the extractive distillation (ED) processes thereby using the LLE column as the outlet for removing accumulated heavy hydrocarbons (HCs) and polymeric materials from the solvent loop of both processes to maintain their solvent performance. The unique capabilities of the LLE column in rejecting heavy HCs from the solvent into a raffinate product stream that leaves the system enable the removal of the accumulated heavy HCs and polymeric materials from the closed solvent loop of the ED process when their lean solvent loop are cross connected. Cross connection requires minimum equipment change. In the revamped system, the solvent recovery column (SRC) in LLE process supplies lean solvent for the extractive distillation column while the SRC of the ED process supplies lean solvent for LLE column.
    • 一种用于在液体液体萃取(LLE)和萃取蒸馏(ED)方法之间交叉连接贫溶剂供应管线的方法,由此使用LLE柱作为从所述液体萃取(L)和溶剂回路的溶剂回路中除去积聚的重质烃(HC)和聚合物材料的出口 这两个过程都保持其溶剂性能。 LLE柱在从溶剂中排出沉重的HCs到离开系统的萃余液产物流中的独特功能使得当它们的稀溶剂回路交叉时从ED过程的闭合溶剂回路中除去积聚的重HC和聚合物材料 连接的。 交叉连接需要最小的设备更换。 在改造的系统中,LLE方法中的溶剂回收塔(SRC)为萃取蒸馏塔提供贫溶剂,而ED工艺的SRC为LLE柱提供稀溶剂。