Separation process

Details Separation process Separation process

C - Chemistry, Metallurgy

07

C

182/6

C07C 7/12 (2006.01) B01D 15/18 (2006.01) B01D 53/04 (2006.01) C07C 7/13 (2006.01)

Patent

CA 1157385

"SEPARATION PROCESS" ABSTRACT A process for separating three components from a feedstream employ- ing an adsorbent and desorbent material which in combination have selectivi- ties for the components in descending order of magnitude. The process uses a simulated-moving bed counter current flow system with an intermediate raffinate stream taken off the column at about the midpoint of the adsorp- tion zone in addition to the usual extract and raffinate product streams. In one embodiment, the first component is para-xylene, the second component is ethyl benzene, and the third component is a mixture of metal and ortho- xylene. In another embodiment, the first component is para-xylene, the second component is a mixture of para-xylene and orthoxylene, and the third component is ethylbenzene.

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