Production of high purity butene-1 from C4 olefins/paraffins mixed gas

An apparatus for separating butene-1 from a mixture gas of C4 olefins/paraffins by separating the C4 olefins from a mixture gas of C4 olefins/paraffins and distilling the separated C4 olefins by carrying out repeated sequential adsorbing, rinsing and desorbing in such a way of performing displacement desorption using desorbents, in adsorption towers loaded with adsorbents which selectively adsorb olefins and a distillation tower for the separation of olefins/desorbents, a distillation tower for the separation of paraffins/desorbents, and a distillation tower for the separation of butene-1 that separate the C4 olefins recovered from the adsorption towers by using desorbents,

• wherein the adsorption tower is configured to include:
• an adsorption tower (AD-1) that is connected with a feeding conduit (1) that feeds the mixture gas of C4 olefins/paraffins to the adsorption tower (AD-1), a C4 olefins/desorbents discharging conduit (2) that is connected with a distillation tower (D2), a conduit (3) that is connected between the adsorption tower (AD-1) and the distillation tower (D2) to feed a predetermined amount of C4 olefins from the distillation tower (D2) to the adsorption tower (AD-1), a conduit (4) that guides the paraffins/desorbents, which is discharged at the rinsing to a distillation tower (D1), a conduit (5) that feeds the paraffins/desorbents, which is discharged at the adsorbing, to the distillation tower (D1), and a conduit (6) that is fed with desorbents separated from the distillation towers (D1 and D2) to the adsorption tower (AD-1),
• an adsorption tower (AD-2) that is connected with the feeding conduit (1) that feeds the mixture gas of C4 olefins/paraffins to the adsorption tower (AD-2), the C4 olefins/desorbents discharging conduit (2) that is connected with the distillation tower (D2), the conduit (3) that is connected between the adsorption tower (AD-2) and the distillation tower (D2) to feed a predetermined amount of C4 olefins from the distillation tower (D2) to the adsorption tower (AD-2), the conduit (4) that guides the paraffins/desorbents, which is discharged at the rinsing, to the distillation tower (D1), the conduit (5) that feeds the paraffins/desorbents, which is discharged at the adsorbing, to the distillation tower (D1), and the conduit (6) that is fed with desorbents separated from the distillation towers (D1 and D2) to the adsorption tower (AD-2), and
• an adsorption tower (AD-3) that is connected with the feeding conduit (1) that feeds the mixture gas of C4 olefins/paraffins to the adsorption tower (AD-3), the C4 olefins/desorbents discharging conduit (2) that is connected with the distillation tower (D2), the conduit (3) that is connected between the adsorption tower (AD-3) and the distillation tower (D2) to feed a predetermined amount of C4 olefins from the distillation tower (D2) to the adsorption tower (AD-3), the conduit (4) that guides the paraffins/desorbents, which is discharged at the rinsing, to the distillation tower (D1), the conduit (5) that feeds the paraffins/desorbents, which is discharged at the adsorbing, to the distillation tower (D1), and the conduit (6) that is fed with desorbents separated from the distillation towers (D1 and D2) to the adsorption tower (AD-3),
• wherein the conduit (4) further comprises a valve (7) for the conduit (4) guided to the distillation tower (D1), and
• wherein the distillation tower for the separation of paraffins/desorbents is the distillation tower (D1) that separates the C4 paraffins and desorbents from the adsorption towers (AD-1, AD-2, and AD-3) and the distillation tower for the separation of olefins/desorbents is the distillation tower (D2) that separates the C4 olefins and desorbents from the adsorption towers (AD-1, AD-2, and AD-3), and the distillation tower for the separation of butene-1 is a distillation tower that separates butene-1 by distillation of C4 olefins from the distillation tower (D2).