PROCESS FOR PREPARING ALKYL TERT-BUTYL ETHERS AND DI-N-BUTENE FROM FIELD BUTANES

摘要

The invention relates to a process for preparing di-n-butene and an alkyl tert-butyl ether from a field butane by (a) separating the field butane 1 into n-butane and isobutane, (b) dehydrogenating the n-butane 5 to give dehydrogenation mixture 7 containing n-butene, oligomerizing the n-butene to give an oligomer mixture 11 and separating di-n-butene 12 off, and (c) dehydrogenating the isobutane 15 to give a dehydrogenation mixture 17 containing isobutene and reacting the isobutene with an alkanol 20 to give an alkyl tert-butyl ether 21. In a preferred embodiment, the field butane 1, prior to the separation, is subjected to hydrogenation 2 and isomerization 3 in which a ratio of n-butane to isobutane is set in accordance with a desired ratio of the alkyl tert-butyl ether to di-n-butene.