Method and device for obtaining distillative pure 1,3-butadiene from crude 1,3-butadiene.

摘要

Procedure for obtaining by distillation of 1, 3-butadiene pure, containing at least 99, 6% by weight of 1, 3-butadiene, up to 10 ppm of propyne and not more than 20 ppm of 1, 2- butadiene, from 1, 3-butadiene crude, containing about 89 to 99, 5% by weight of 1, 3-butadiene, other impurities, wherein the process is carried out in a column separation wall (1), in which it is arranged a dividing wall (8) in the longitudinal direction of the column with formation of an area of ​​common upper column (9), a zone of lower common column (14), a feed (10 , 12) and an extraction portion (11, 13), and wherein the residence time in the bottom vaporizer (7) and the corresponding system of tubular conduits is limited to 1 to 15 minutes.