| 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 five zones 6, 5, 4, 3 and 2 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, the same solvent is introduced but at a lower temperature and/or pressure (so-called weak solvent S1), extract containing weak solvent E1 is drawn off, the mixture to be separated is introduced, raffinate containing weak solvent R is drawn off, 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 purification of water containing phenol, para-cresol and toluene. …<IMAGE>… |
