| 摘要 |
<p>Chromatographic separation process for producing at least two fractions involves at least partially evaporating the solvents of the produced fractions and separating the solvent vapors thus produced. The evaporation stage can be operated entirely using solvent vapors. Part of the solvent vapors separated from the other evaporated fraction is partially recycled. At least one of the fractions is preheated before evaporation. Chromatographic separation process for producing at least two fractions involves at least partially evaporating the solvents of the produced fractions and separating the solvent vapors thus produced. Two fractions, extract and refined, are evaporated. The evaporation stage can be operated entirely using solvent vapors separated from one of the other evaporated fractions. Part of the solvent vapors separated from the other evaporated fraction is partially recycled, after evaporation of the considered fraction, to upstream of the evaporation stage of the other fraction. At least one of the fractions is preheated before evaporation with the solvent vapors separated from one of the evaporated fractions. The solvent is recycled. The chromatographic separation is type SMB or VARICOL. An Independent claim is included for a chromatographic device comprising a central separation unit on a chromatographic bed; at least two fraction lines (1A, 1B); at least two evaporators (2A, 2B) connected to the fraction lines; heating fluid lines (3A, 3B) connected to the evaporators respectively; extraction lines (5A, 5B) downstream of the evaporators to receive the at least partially evaporated fractions as a liquid+vapor mixture, and separators (6A, 6B) connected to the extraction lines to receive the solvent in a line (7A, 7B). The two lines (1A, 1B) containing extract and refined respectively. An additional heat exchanger is fitted to the extract line and connected to the refined output line to supply the heating fluid. A solvent and heating fluid line (4B) leaves the evaporator and a line connected this line to the extract line feeding the evaporator for partial recycling. The evaporators are simple or multiple effect. The device also contains a solvent recycling device.</p> |
