- 专利标题： PROCEDE ET DISPOSITIF DE REDUCTION DES COMPOSES AROMATIQUES POLYCYCLIQUES LOURDS DANS LES UNITES D'HYDROCRAQUAGE
- 专利标题（英）： Method and device for reducing heavy polycyclic aromatic compounds in hydrocracking units
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申请号： EP15816741.1申请日： 2015-12-17
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公开(公告)号： EP3237576A1公开(公告)日： 2017-11-01
- 发明人: SAUGE, Thibault , GONZALEZ LLAMAZARES, Roberto , BONNARDOT, Jérôme , FRECON, Jacinthe
- 申请人： AXENS
- 申请人地址： 89 Bd. Franklin Roosevelt B.P. 50802 92508 Rueil Malmaison Cedex FR
- 专利权人： AXENS
- 当前专利权人： AXENS
- 当前专利权人地址： 89 Bd. Franklin Roosevelt B.P. 50802 92508 Rueil Malmaison Cedex FR
- 优先权： FR1463096 20141222
- 国际公布： WO2016102301 20160630
- 主分类号： C10G47/00
- IPC分类号： C10G47/00 ; C10G7/00
摘要：
The invention relates to a method and an apparatus that make it possible to reduce the concentration of heavy polycyclic aromatic compounds (HPNA) in the recycling loop of hydrocracking units comprising a fractioning column. According to the method of the invention, a stream is drawn off from the fractioning column in the region of at least one tray located between the feed tray and the draw-off tray for the heaviest distillate fraction, the stream is stripped in an external stripping step by means of a stripping gas in the presence of a portion of the residue. The separated gaseous effluent is recycled in the column, advantageously as the stripping gas, and the liquid fraction is recycled in the hydrocracking step, a residue is purged in the stripping step.
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