| abstract |
The invention relates to a method for the treatment of a C4 fraction, consisting of the following steps: extractive distillation (I), selective hydrogenation on a heterogeneous catalyst (II), a stream of crude 1,3-butadiene from of steps (I) and (II); and distillation of the crude 1,3-butadiene stream to obtain pure 1,3-butadiene (III). Steps I and II are carried out in an individual column or in thermally coupled columns, and step (III) is carried out in a second column. |