发明申请
- 专利标题: PROCESS FOR THE RECOVERY OF PURE AROMATICS FROM HYDROCARBON FRACTIONS CONTAINING AROMATICS
- 专利标题(中): 从包含芳族化合物的烃类中恢复纯净芳烃的方法
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申请号: US13138587申请日: 2010-02-18
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公开(公告)号: US20120067776A1公开(公告)日: 2012-03-22
- 发明人: Thomas Diehl , Helmut Gehrke , Baerbel Kolbe , Dieter Wilken
- 申请人: Thomas Diehl , Helmut Gehrke , Baerbel Kolbe , Dieter Wilken
- 申请人地址: DE Dortmund
- 专利权人: UHDE GMBH
- 当前专利权人: UHDE GMBH
- 当前专利权人地址: DE Dortmund
- 优先权: DE102009012265.6 20090311
- 国际申请: PCT/EP2010/001024 WO 20100218
- 主分类号: C10G35/04
- IPC分类号: C10G35/04 ; B01J19/00
摘要:
A process for the recovery of a pure aromatics-containing product is disclosed. This product is obtained by extractive distillation of a gasoline rich in aromatics, in which olefins, diolefins and polyolefins are separated, and this extractive distillation is followed by a hydrogenation of the recovered aromatics-rich, olefin-lean product stream, in which the alkylated aromatics, especially toluene and xylene, are dealkylated and the paraffinic dealkylation products further converted into methane so that a significant portion of hydrogen can be saved by carrying out the hydrogenation subsequent to the extractive distillation, as the aromatics mixture is then free of olefins and no hydrogen is required for an olefin hydrogenation, with extractive distillation and recovery of the extracting solvent taking place in one column. An apparatus for carrying out the process described is also disclosed. A column is preferably used for the extractive distillation which allows performing the extractive distillation with a solvent recycling system so that it is not required to provide an additional stripping column for removing the extracting solvent.
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