Title:
パラ-キシレン製造方法
Document Type and Number:
Japanese Patent JP4808313
Kind Code:
B2
Abstract:
A process is described for increasing the efficiency of para-xylene production using a two stage isomerization sequence. In the first stage of the process, a C9<+> aromatics feedstock is subjected to ethylbenzene conversion and xylene isomerization. Non-C8 aromatics are removed from the effluent, which is then processed in a second stage of the process to remove para-xylene and isomerize the para-xylene depleted effluent. The effluent from the second stage isomerization unit is then recycled into the inlet of the second stage of the process and a slip stream from the para-xylene separator is recycled to the feedstock and to the effluent of the ethylbenzene conversion unit. In this way, the production of para-xylene is maximized. In a preferred embodiment, toluene is co-fed into the feedstock to minimize the loss of xylenes during the ethylbenzene conversion reaction.
Inventors:
Abi Chandani, Jiban Sahib
Beck, Jeffrey Scott
Brown, Stephen Harold
Chimini, Ronald George
Quoc, Selma
Johnson, Ivy Dawn
Rigras, Dimitris Constantin
Stern, David Lawrence
Beck, Jeffrey Scott
Brown, Stephen Harold
Chimini, Ronald George
Quoc, Selma
Johnson, Ivy Dawn
Rigras, Dimitris Constantin
Stern, David Lawrence
Application Number:
JP2000566220A
Publication Date:
November 02, 2011
Filing Date:
August 12, 1999
Export Citation:
Assignee:
Exxon Mobil Oil Corporation
International Classes:
C07C5/27; C07C4/18; C07C15/08
Domestic Patent References:
| JPS53137920A | 1978-12-01 | |||
| JPS55394A | 1980-01-05 | |||
| JPS63196528A | 1988-08-15 | |||
| JPH08245436A | 1996-09-24 | |||
| JPS6456628A | 1989-03-03 | |||
| JPS5116619A | 1976-02-10 |
Attorney, Agent or Firm:
Yuzo Yamazaki
Kiko Okada
Hideo Hayashi
Kiko Okada
Hideo Hayashi