Development of processes for C4 hydrocarbons separation and 1,3-butadiene purification

Physicochemical substantiation and improved more effective technologies for C 4 -hydrocarbons separation and 1,3-butadiene purification with the help of polar extragents are given, such as compressorless extractive rectification with the use of an intermediate desorbent, extractive rectification of the butane- n -butene fraction with preliminary isomerization of 1-butene into 2-butenes, the combined removal of -acetylenes C 4 and methylallene by rectification with a small introduction of the extragent, and the hydration of butenyne in the C 4 fraction and distillation of propyne from it.