| abstract |
The invention relates to a process for the preparation of hydrocarbons in which a catalytic unit (1) using one or more catalytic streams containing oxygenates and / or olefins comprises (a) an n-butane, isobutane, 1-butene, 2-butene, Isobutene and hydrocarbons having more than four and / or less than three carbon atoms, and further comprising a vapor crack product stream (h) in a vapor column unit (2) using one or more vapor column feed streams (g, r, s). is produced. It is envisaged that a skeletal isomerization feedstream (f, q) containing 1-butene, 2-butene and isobutene and containing at least isobutane is produced using the catalytic product stream (b) in which the isobutane is at least predominantly skeletonized by isomerization. Butane is reacted, which is then at least partially used as the or one of the steam column feed streams (g, r). A system (100, 200) is also the subject of the invention. |