| 摘要 |
The invention relates to a process and a facility for the production of ultra-pure aromatics with 6 to 8 carbon atoms from a hydrocarbon mixture which consists of at least one aromatic compound, an olefinic compound, a paraffinic compound or a mixture thereof and which contains impurities consisting of water-soluble organic and/or inorganic substances. An extremely high degree of purity of the product obtained by said process can be achieved with regard to impurities in the form of organic or inorganic compounds of the elements sulphur, nitrogen, oxygen and chlorine. To this end, the aromatics are separated from the non-aromatics by means of extractive distillation and an aqueous solution 14 is dispersed in a mixing zone 12 and added to the head product 10 of the stripping column 9. The two-phase vapor 15 which is thus formed and which is laden with a mist of droplets is then transferred directly to a condensation zone 13 in which it precipitates. The condensate emulsion 16 that forms in the process is fed to a separation zone 17 in which the partial liquid phase 19 containing the ultra-pure aromatics is separated from the other partial liquid phase 22 containing dissolved impurities. The mixing zone 12 and the condensation zone 13 are accommodated in a common space, both zones being enclosed by the shell of an individual apparatus.
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