| 摘要 |
The invention refers to a process to obtain di-n-butenes, alkylethers, and butylethers in a coupled production from field butanes, wherein (a) field butenes 1 are separated in separation stage 4 in n-butane and iso-butane, (b) in a dehydrogenation stage 6 n-butene 5 is dehydrogenated to a dehydrogenation mixture 7 containing n-butene, n-butene is oligomerized in oligomerization stage 10 to a mixture 11 of oligomers, and from this di-n-butene 12 is separated, and (c) in dehydrogenation stage 16, isobutane 15 is dehydrogenated to a dehydrogenation mixture 17 containing n-butene, and in sterification stage 19 iso-butene is transformed with an alkanol 20 to an alkyl-ter-butylether 21. An advantageous embodiment is characterized in that field butanes 1, before entering separation stage 4, in hydrogenation stage 2, are subjected to hydrogenation conditions, and to separation stage 4 an isomerization stage 3 is assigned, through which n-butane and iso-butane quantity ratio is adjusted, according to alkyl-ter-butylether to di-n-butene desired quantities ratio.
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