CONTINUOUS PROCESS AND DEVICE FOR CHROMATOGRAPHIC SEPARATION OF MIXTURE OF AT LEAST THREE CONSTITUENTS INTO THREE PURIFIED EFFLUENT BY MEANS OF SINGLE SOLVENT AT TWO DIFFERENT TEMPERATURES AND/OR TWO DIFFERENT PRESSURE

摘要

Process and apparatus for continuous, fluid phase separation of a mixture of at least three constituents into three fractions. …??A so-called simulated countercurrent technique is employed in a separation column filled with a sorbent having six zones 6, 5, 4, 3, 2 and 1 with different functions and the sequence of following stages is carried out: so-called strong solvent S2 is introduced, an extract E2 containing strong solvent is removed, so-called weak solvent S1 is introduced. Extract containing weak solvent E1 is drawn off, the mixture to be separated is introduced, raffinate containing weak solvent R is drawn off, rinsing solvent (S1) is introduced, a stream Rcy is recycled alternately towards the feed of the strong solvent S2 and then towards the feed of the weak solvent S1. A stream originating from the zone 6 is conveyed alternately towards an exit for extract containing strong solvent E2 and then towards the entry of the fifth zone. The various feeds and draw-offs are synchronously moved forward at regular intervals through the column. …??Application especially to the separation of glucose, xylose and arabinose and to the separation of para-xylene, of ortho-xylene and meta-xylene and of ethylbenzene. …IMAGE…