Method and device for the chromatographic separation of a mixture of at least three constituents in the three effluents purify by means of a single solvent at two temperatures and / or at two different pressures.

摘要

- describes a method and a separation device continuously and in fluid phase of a mixture of at least three constituents into three fractions. & br / - it uses a technique called "against - current simulated in a separation column filled with a sorbent with five zones 6,5,4,3 and 2 with different functions and the sequence of the following steps: it is introduced the solvent, said strong s2, it takes up an extract e2 to the solvent, is introduced in the same solvent, but at a temperature and / or to a lower pressure (solvent s1 so-called low), is withdrawn from the extracted with the solvent small e1, the mixture is introduced to be separated, it is withdrawn, the raffinate the solvent small r, is recycled to a current rc is alternately to the supply of the solvent strong s2 and then towards the supply of the solvent small s1 . It sends a current coming from the zone 6 are alternately towards an outlet for the extraction solvent strong e2, and then towards the inlet of the fifth zone. It is periodically move synchronously through the column the various supplies and withdrawals. & br / application in particular to the separation of the glucose, xylose and arabinose, and to the purification of water containing phenol, paracresol and toluene.