Basf Aktiengesellschaft

Peter Trübenbach

Ekkehard Schwab

Gerd Kaibel

Manfred Stroezel

Michael Koch

Carsten Oost

Gerald Meyer

Karl-Heinz Sartor

Harald Schäfer

Jürgen Heners

Hydrocarbon streams are hydrogenated catalytically without using a different solvent from the hydrocarbon stream to be hydrogenated, with a basic compound being added to the starting-material stream. The formation of undesired secondary components on the catalyst is thereby effectively prevented.

Process for catalytic hydrogenation

A process is proposed for the separation of Ccuts by distillation into a low-boiler (A), a medium-boiler (B) and a high-boiler fraction (C) in one or more dividing-wall columns (TK), in which a dividing wall (T) is arranged in the longitudinal direction of the column with formation of an upper, common column region (), a lower, common column region (), a feed part () with rectifying section () and stripping section (), and a withdrawal part () with rectifying section () and stripping section (), with feed of the Ccut (A, B, C) into the central region of the feed part (), discharge of the high-boiler fraction (C) from the bottom of the column, discharge of the low-boiler fraction (A) via the top of the column, and discharge of the medium-boiler fraction (B) from the central region of the withdrawal part (), wherein the dividing ratio of the liquid reflux at the upper end of the dividing wall (T) is set in such a way that the proportion of high-boiling key components in the liquid reflux over the stripping section () of the withdrawal part at the upper end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in the medium-boiler fraction (B), and wherein the heating power in the evaporator at the bottom of the dividing-wall column (TK) is set in such a way that the concentration of the low-boiling key components in the liquid at the lower end of the dividing wall (T) is from 10 to 80%, preferably from 30 to 50%, of the limit value allowed in the medium-boiler fraction (B).

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Birkenheide, Germany

Peter Trübenbach