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US5176821A Process for the separation of aromatic hydrocarbons with energy redistribution 失效
用能量再分布分离芳烃的方法

  • 专利标题: Process for the separation of aromatic hydrocarbons with energy redistribution
  • 专利标题(中): 用能量再分布分离芳烃的方法
  • 申请号: US657916
    申请日: 1991-02-20
  • 公开(公告)号: US5176821A
    公开(公告)日: 1993-01-05
  • 发明人: Paulino Forte
  • 申请人: Paulino Forte
  • 申请人地址: IL Des Plaines
  • 专利权人: UOP
  • 当前专利权人: UOP
  • 当前专利权人地址: IL Des Plaines
  • 主分类号: B01D3/38
  • IPC分类号: B01D3/38 B01D3/40 C07C7/10
Process for the separation of aromatic hydrocarbons with energy
redistribution
摘要:
In a combined solvent extraction/steam distillation process for the separation of aromatic hydrocarbons from a mixture of aromatic and non-aromatic hydrocarbons, there are three major thermal and material cycles: the solvent cycle, the hydrocarbon cycle, and the water cycle. The process is improved by redistributing the energy use between the three cycles to minimize the internal recycle within the process and to reduce the overall energy requirements. One means of the redistribution includes cooling of a lean solvent stream with liquid in a recovery or stripping column. Cooling of the lean solvent reduces flashing within an extract column and the resulting reflux of hydrocarbons to the extract column.
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