| 摘要 |
The invention relates to a method for the production of propene from propane comprising the steps:A) a feed gas stream containing propane is prepared,B) the feed gas stream containing propane a and an oxygen-containing gas stream are supplied to a dehydrogenation zone and propane is subjected to a non-oxidative catalytic autothermal dehydrogenation to give propene, whereby a product gas stream b containing propane, propene, methane, ethane, ethene, nitrogen, carbon monoxide, carbon dioxide, water vapour and hydrogen is obtained,C) the product gas stream b is cooled and water vapour separated off by condensation to give a product as stream c stripped of water vapour,D); non-condensable or low-boiling gas components are separated off by bringing the product gas stream c into contact with an inert absorption agent with subsequent desorption of the gases dissolved in the inert absorption agent, whereby a Chydrocarbon stream d1 and a waste-gas stream d2, containing methane, ethane, ethene, nitrogen, carbon monoxide, carbon dioxide and hydrogen are generated,E) the Chydrocarbon stream d1 is cooled and compressed, to give a liquid Chydrocarbon stream e1,F) the liquid Chydrocarbon stream e1 is fed to a first distillation zone and separated by distillation into a stream f1 containing propane and propene and a stream f2 containing ethane and ethene andG) the stream f1 is fed to a second distillation zone and separated by distillation into a product gas stream g1 of propene and a stream g2 of propane,; whereby the stream g2 is at least partly recycled into the dehydrogenation zone. |
