METHOD OF PRODUCING 1-BUTENE AND ISOBUTENE AND/OR DERIVATIVES THEREOF Russian patent published in 2012 - IPC C07C11/08 C07C11/09 C07C5/25 C07C5/27 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 1-butene and isobutene and/or compound(s) thereof with alcohol(s), water, or products of di- and trimerisation of isobutene from a mixture of C₄-hydrocarbons, primarily containing 2-butenes, using skeletal and positional isomerisation of 2-butenes and at least rectification, characterised by that catalysed isomerisation of 2-butenes is carried out at temperature ranging from 100°C to 500°C in a common reaction zone where positional and skeletal isomerisation to 1-butene and isobutene take place, or in separate reaction zones, in one of which there is positional isomerisation to 1-butene and in the other there is simultaneous skeletal and positional isomerisation to isobutene and 1-butene; the isobutene formed is extracted from the mixture initially in form of alkyl-tert-butyl ester(s) and/or tert-butanol and/or isobutene dimers and trimers and, optionally, said compound(s) is(are) subjected to catalysed decomposition with release of isobutene, and from the stream(s) in which 1-butene and 2-butenes are predominant, a stream primarily containing 1-butene is separated by rectification and the residue, which primarily contains 2-butenes, is at least partially recycled into the zone where there is skeletal isomerisation.

EFFECT: method enables to obtain 1-butene and isobutene in a common process, which enables to cut the size of the necessary equipment and more rationally organise flow.

11 cl, 8 ex, 3 tbl, 2 dwg