Liquid purification or separation – Processes – Chromatography
Patent
1995-06-22
1996-11-26
Therkorn, Ernest G.
Liquid purification or separation
Processes
Chromatography
2101982, B01D 1508
Patent
active
055782167
ABSTRACT:
In a simulated mobile bed separation process, perturbations are corrected in the compositions of an extract (EA) or raffinate (RB) due to the dead volume introduced by at least one recycling pump (P) or compressor for a liquid, supercritical or gaseous mixture in a closed circuit of column sections. The volume of the section immediately upstream of the dead volume is reduced by an appropriate value when said dead volume is located downstream of this section and upstream of the extraction streams of said section, or the volume of the section immediately downstream of the dead volume is reduced by an appropriate value when the dead volume is located downstream of the injection streams into said section and upstream of this section.
The invention is applicable to the separation of isomers of aromatic hydrocarbons containing 8 carbon atoms.
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Cohen Choua
Couenne Nicolas
Hotier Gerard
Nicoud Roger-Marc
Institut Francais du Pe'trole
Separex
Therkorn Ernest G.
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