Title:
改善された生産性を有するパラキシレンとベンゼンの統合された生産方法
Document Type and Number:
Japanese Patent JP5205255
Kind Code:
B2
Abstract:
A process for the combined production of para-xylene and benzene comprises: separating a first feed, by adsorption in a simulated moving bed SMB, to produce an extract E rich in para-xylene and at least one raffinate R which is depleted in para-xylene; converting a secondary feed of toluene by selective disproportionation to produce benzene and xylenes; a) at the start of the cycle, producing a supplemental quantity of para-xylene in a crystallization unit supplied with the xylenes from the disproportionation; b) at the end of the cycle, when the adsorbant has aged: dividing the distilled extract E into a first fraction Ea and a complementary second fraction Eb; replacing the feed to the initial crystallization by the stream Ea; and recycling the xylenes from the disproportionation to the SMB. The invention enables para-xylene and benzene production to be maintained despite ageing of the SMB absorbent.
Inventors:
Ochier Gerard
Theoil Kim
Theoil Kim
Application Number:
JP2008501363A
Publication Date:
June 05, 2013
Filing Date:
March 14, 2006
Export Citation:
Assignee:
INSTITUT FRANCAIS DU PETROL
International Classes:
C07C2/66; B01D15/00; C07C4/18; C07C5/27; C07C7/04; C07C7/14; C07C15/04; C07C15/08
Domestic Patent References:
| JP5201886A | ||||
| JP10174801A | ||||
| JP6011056A | ||||
| JP8323104A | ||||
| JP8155206A | ||||
| JP8178908A | ||||
| JP2002528738A | ||||
| JP2007512293A | ||||
| JP2004050041A |
Foreign References:
| US6004452 | ||||
| US5866740 |
Attorney, Agent or Firm:
Einosuke Kishimoto
Akira Watanabe
Matsumura Naoto
Akira Watanabe
Matsumura Naoto
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