/ COLUMN WITH SEPARATIVE INSTALLATIONS FOR SEPARATING A MIXTURE OF HYDROCARBONS AND/OR HYDROCARBON DERIVATIVES BY MEANS OF AN EXTRACTIVE DISTILLATION USING A SELECTIVE SOLVENT

摘要

The present invention provides an alternative solvent 2 in which the optional solvent 2 is fed to the upper column region and a mixture of the hydrocarbon and / or hydrocarbon derivative 1 to be separated is fed below the feed of the optional solvent 2, (E) for separating a mixture (1) of hydrocarbons and / or hydrocarbon derivatives by means of an extractive distillation using a distillation column (E). In column (K), the optional solvent (2) is loaded with a mixture (1) component of which the solvent has a greater affinity and the solvent is discharged from the lower column area as the loaded selective solvent (3) On the other hand, the mixture component to be separated which the selective solvent 2 has a lower affinity remains in the vapor phase and is withdrawn as the upper stream 4, which is completely or partially condensed to give a condensate 5, It is partially withdrawn as product stream 6 or returned to column K as the running return stream 7. The present invention is characterized in that a substantially horizontal first supply pipe (R1) for supplying an optional solvent is provided in the column region above the separation inner product (E) and a substantially horizontal first supply pipe (R1) Has a cross-sectional narrowing to the narrowest point (V) and is widened again after the cross-section is narrowed-open to the first feed pipe (R1) which is substantially horizontal in the region of the narrowest point (V) And a second supply pipe (R2) for supplying the return stream (7).