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    • 51. 发明授权
    • VERFAHREN ZUR HERSTELLUNG VON BUTADIEN AUS N-BUTAN
    • PROCESS FOR制丁二烯由正丁烷
    • EP1828080B1
    • 2011-02-23
    • EP05849467.5
    • 2005-12-07
    • BASF SE
    • CRONE, SvenKLANNER, CatharinaSCHINDLER, Götz-PeterDUDA, MarkBORGMEIER, Frieder
    • C07C5/333C07C11/167
    • C07C11/167C07C5/48
    • The invention relates to a method for producing butadiene from n-butane comprising the following steps: A) a feed gas stream (a) which contains an n-butane is prepared; B) the feed gas stream (a) containing the n-butane is introduced into at least one first dehydrogenation zone and the said n-butane in dehydrogenated in a non-oxidative, catalytic manner, whereby a gas flow (b) containing n-butane, 1-butene, 2-butene, butadiene, hydrogen, optionally carbon dioxide and optionally water vapour is contained; C) the gas flow (b) and a gas containing oxygen is fed into at least one second dehydrogenation zone and the 1-butene and 2-butene is oxidatively dehydrogenated, whereby a gas flow (c) containing n-butane, butadiene, hydrogen, carbon dioxide and water vapour is obtained; D) compression is carried out in at least one first compression step and the gas flow is cooled (c), whereby at least one condensate flow (d1) which contains water and a gas flow (d2) containing n-butane, butadiene, hydrogen, carbon dioxide and water vapour is obtained, E) the gas flow (d2) is separated by means of extractive distillation in a product flow (e1) which is made of, essentially butadiene and a flow (e2) containing n-butane, hydrogen, carbon dioxide and water vapour (e2), F) compression is carried out in at least one additional compression step and the gas flow (e2) is cooled, whereby at least one condensate flow (f1) which contains n-butane and water and a gas flow (f2) containing n-butane, hydrogen and carbon dioxide is obtained, G) the gas flow (f2) is cooled, whereby the condensate flow (g1) containing n-butane and a waste gas flow (g2) containing carbon dioxide and hydrogen are obtained, H) water is separated from the at least one condensate flow (f1) and, optionally, the condensate flow (g1) by phase separation, whereby at least the return flow (h1) containing n-butane and at least one waste water flow (h2) are obtained, and g the at least one return flow (h1) is returned in the first dehydrogenation zone.
    • 53. 发明授权
    • VERFAHREN ZUR HERSTELLUNG VON PROPEN AUS PROPAN
    • EP1836146B1
    • 2009-08-05
    • EP06700188.3
    • 2006-01-04
    • BASF SE
    • CRONE, SvenMACHHAMMER, OttoSCHINDLER, Götz-PeterBORGMEIER, Frieder
    • C07C5/327C07C7/11C07C7/04
    • C07C5/3337C07C7/11C07C11/06
    • A) A feed stream containing propane is prepared, B) the feed stream containing propane, optionally steam and optionally an oxygen-containing gas stream are fed to a dehydrogenation zone and propane undergoes a dehydrogenation to give propene, whereby a product gas stream b is obtained containing propane, propene, methane, ethane, ethene, carbon monoxide, carbon dioxide, steam, optionally hydrogen and optionally oxygen, C) the product gas stream b is cooled, optionally compressed and steam separated off by condensation, to give a product gas stream c stripped of steam, D) the product gas stream c is brought into contact with a selective inert absorption agent which selectively absorbs propene in a first absorption zone, to give an essentially propane-charged absorption agent stream d1 and a gas stream d2 containing propane, methane, ethane, ethene, carbon monoxide, carbon dioxide and hydrogen, E) the absorption agent stream d1 is optionally depressurised in a first desorption zone, to give an essentially propene-charged absorption agent stream e1 and a gas stream e2, containing propene, said gas stream e2 being recycled into the first absorption zone and F) a propene-containing gas stream f1 is released from the essentially propene-charged absorption agent stream d1 and e1 in at least one second desorption zone by depressurization, heating and/or stripping of the absorption agent stream d1 and e1 with recycling of the selective absorption agent.