| 摘要 |
<p>A process of fractional distillation of a mixture (F) of at least two constituents capable of being separated by distillation, to obtain separately a condensed head product (D) and a residual product (R), in which the said mixture (F) of at least two constituents which can be separated by heat (10) in a distillation zone (1) is introduced into the said distillation zone and a vapour phase and a liquid residue phase constituting the required residual product (R) are collected separately, and in which at least a part of the vapour phase (3) is removed, it is compressed in means of ejection by means of a driving gas (6), heat is given up to a least one of the distillation (1) zones (20) so as to condense at least partially the ejected mixture made up of the said driving gas and the said part of the vapour phase, a part of the resulting condensate (15) is drawn off, the said part forming at least a part of the required condensed product (D), and the other part of the condensate is compressed by means of compression (19) and is vaporised (21) by means of heat of external origin and is conveyed to the means of ejection as a driving gas (6). <IMAGE></p> |
