IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0593252
(2008-04-11)
|
등록번호 |
US-8431762
(2013-04-30)
|
우선권정보 |
KR-10-2007-0040366 (2007-04-25) |
국제출원번호 |
PCT/KR2008/002038
(2008-04-11)
|
§371/§102 date |
20090925
(20090925)
|
국제공개번호 |
WO2008/133414
(2008-11-06)
|
발명자
/ 주소 |
- Park, Jong-Ho
- Kim, Jong-Nam
- Lee, Seong-Jun
- Ko, Min-Su
- Beum, Hee Tae
- Park, Jongkee
- Ko, Chang Hyun
- Han, Sang Sup
- Cho, Soon-Haeng
|
출원인 / 주소 |
- Korea Institute of Energy Research
|
대리인 / 주소 |
|
인용정보 |
피인용 횟수 :
0 인용 특허 :
11 |
초록
▼
The present invention relates to a hybrid process comprising an adsorption process and a distillation process for the separation of butene-1 from a C4 hydrocarbon mixture gas including butene-1, trans-2-butene, cis-2-butene, normal butane, isobutane, etc. The above hybrid process comprises introduci
The present invention relates to a hybrid process comprising an adsorption process and a distillation process for the separation of butene-1 from a C4 hydrocarbon mixture gas including butene-1, trans-2-butene, cis-2-butene, normal butane, isobutane, etc. The above hybrid process comprises introducing a gaseous C4 mixture into the adsorption tower loaded with adsorbents which adsorb olefins selectively to discharge C4 paraffins to the outlet of the tower, desorbing C4 olefins selectively adsorbed in the adsorption tower to produce high purity C4 olefins mixture gas in which isobutane and normal butane was removed, and separating the high C4 olefins mixture gas (a mixture of butene-1, trans-2-butene, cis-2-butene, and a trace amount of C4 paraffins) via distillation to obtain high purity butene-1 including a trace amount of isobutane in the top of the distillation tower and obtain a mixture gas including trans-2-butene, cis-2-butene and a trace amount of normal butane in the bottom of the tower.
대표청구항
▼
1. A method for separating butene-1 from a mixture gas of C4 olefins/paraffins by distilling C4 olefins obtained after the separation of the C4 olefins from a mixture gas of C4 olefins/paraffins by performing displacement desorption using desorbents, in a separating apparatus of several adsorption t
1. A method for separating butene-1 from a mixture gas of C4 olefins/paraffins by distilling C4 olefins obtained after the separation of the C4 olefins from a mixture gas of C4 olefins/paraffins by performing displacement desorption using desorbents, in a separating apparatus of several adsorption towers loaded with adsorbents which selectively adsorb olefins, a distillation tower for the separation of olefins/desorbents and a distillation tower for the separation of paraffins/desorbents, the method comprising: adsorbing olefins by introducing the mixture gas of C4 olefins/paraffins into the adsorption towers loaded with adsorbents and discharging non-adsorbed paraffins and the desorbents retained in the adsorption tower at the desorption step to the outlet of the adsorption tower and then discharging them to the distillation towers that separates parrafins and desorbents;rinsing with C4 olefin to increase the purity of olefins by introducing a portion of high purity C4 olefins resulting from the distillation process of olefins/desorbents into the adsorption towers after the completion of the adsorption and cleaning a small amount of paraffins adsorbed together with olefins;desorbing C4 olefins by introducing desorbents into the adsorption towers after the completion of the rinsing and discharging the mixture of olefins/desorbents to the distillation towers that separate olefins and desorbents to produce high purity olefins; anddistilling the produced C4 olefins to obtain the butene-1. 2. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 1, wherein the adsorbing, rinsing, and desorbing are repeatedly performed at the adsorption towers. 3. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 1, further comprising: cocurrently depressurizing the adsorption towers to discharge the paraffins retained in the adsorption towers before the rinsing. 4. The method for separating butene-1 from a mixture as of C4 olefins/paraffins according to claim 1, further comprising: pressure equalization step at which the paraffin components present in the interior of the adsorption tower after the completion of the adsorbing step is transferred to the another adsorption tower which just completed the desorption step by connecting the two adsorption towers so that the pressure of the adsorption towers becomes equalized, and further includes a cocurrent depressurization step of discharging the paraffin components present in the adsorption towers after the pressure reduction through the pressure equalization step, and a pressurization step which pressurize the adsorption tower to the adsorption pressure by introducing the mixture gas of C4 olefins/paraffins into the adsorption tower partially pressurized through the pressure equalization step. 5. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 1, where the desorbent separated from the olefin/desorbent distillation tower and the paraffin/desorbent distillation tower is recycled into the adsorption tower. 6. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 1, wherein the olefin selective absorbent is selected among the π-complex adsorbent forming π-complex selectively with olefins, type X zeolite or type Y zeolite. 7. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 1, wherein the operating pressure of the adsorption tower is 1 to 10 atm (absolute pressure) and the temperature is 20 to 150° C. 8. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 1, wherein the desorbent is C5 hydrocarbon or C6 hydrocarbon. 9. A method for separating butene-1 from a mixture gas of C4 olefins/paraffins by first distilling the mixture gas of the C4 olefins/paraffins to separate it into a mixture gas of normal butane and butene-2 and a mixture gas of isobutane and butene-1 and then performing displacement desorption using desorbents to separate butane-1 from the mixture gas of isobutene and butane-1, in an apparatus including a distillation tower for the separation of butene-1/desorbents, a distillation tower for the separation of isobutane/desorbents, and several adsorption towers loaded with adsorbents, which selectively adsorb butene-1, the method comprising: distilling the mixture gas of C4 olefins/paraffins to separate it into a mixture gas of normal butane and butene-2 and a mixture gas of isobutane and butene-1;adsorbing butene-1 by introducing the mixture gas of butene-1/isobutane into the adsorption towers loaded with adsorbents and discharging non-adsorbed isobutane and the desorbents retained in the adsorption tower at the desorption step to the outlet of the adsorption tower and then discharging them to the distillation towers that separates isobutane and desorbents;rinsing with butene-1 to increase the purity of butene-1 by introducing a portion of high purity butene-1 resulting from the distillation tower of butene-1/desorbents into the adsorption towers after the completion of the adsorption and cleaning a small amount of isobutene components adsorbed together with isobutane; anddesorbing butene-1 by introducing desorbents into the adsorption towers after the completion of the rinsing and discharging the mixture of butene-1/desorbents to the distillation towers that separate butene-1 and desorbents to produce high purity butene-1. 10. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 9, wherein the adsorbing, rinsing, and desorbing are repeatedly performed at the adsorption towers. 11. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 9, further comprising: further comprising: cocurrently depressurizing the adsorption towers to discharge the paraffins retained in the adsorption towers before the rinsing. 12. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 9, further comprising: pressure equalization step at which the paraffin components present in the interior of the adsorption tower after the completion of the adsorbing step is transferred to the another adsorption tower which just completed the desorption step by connecting the two adsorption towers so that the pressure of the adsorption towers becomes equalized, and further includes a cocurrent depressurization step of discharging the paraffin components present in the adsorption towers after the pressure reduction through the pressure equalization step, and a pressurization step which pressurize the adsorption tower to the adsorption pressure by introducing the mixture gas of C4 olefins/paraffins into the adsorption tower partially pressurized through the pressure equalization step. 13. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 9, where the desorbent separated from the olefin/desorbent distillation tower and the paraffin/desorbent distillation tower is recycled into the adsorption tower. 14. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 9, wherein the olefin selective absorbent is selected among the π-complex adsorbent forming π-complex selectively with olefins, type X zeolite or type Y zeolite. 15. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 9, wherein the operating pressure of the adsorption tower is 1 to 10 atm (absolute pressure) and the temperature is 20 to 150° C. 16. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according, to claim 9, wherein the desorbent is C5 hydrocarbon or C6 hydrocarbon. 17. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 2, further comprising: cocurrently depressurizing the adsorption towers to discharge the paraffins retained in the adsorption towers before the rinsing. 18. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 2, further comprising: pressure equalization step at which the paraffin components present in the interior of the adsorption tower after the completion of the adsorbing step is transferred to the another adsorption tower which just completed the desorption step by connecting the two adsorption towers so that the pressure of the adsorption towers becomes equalized, and further includes a cocurrent depressurization step of discharging the paraffin components present in the adsorption towers after the pressure reduction through the pressure equalization step, and a pressurization step which pressurize the adsorption tower to the adsorption pressure by introducing the mixture gas of C4 olefins/paraffins into the adsorption tower partially pressurized through the pressure equalization step. 19. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 2, whew the desorbent separated from the olefin/desorbent distillation tower and the paraffin/desorbent distillation tower is recycled into the adsorption tower. 20. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 2, wherein the olefin selective absorbent is selected among the π-complex adsorbent forming π-complex selectively with olefins, type X zeolite or type Y zeolite. 21. The method for separating butene-1 front a mixture gas of C4 olefins/paraffins according to claim 2, wherein the operating pressure of the adsorption tower is 1 to 10 atm (absolute pressure) and the temperature is 20 to 150° C. 22. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 2, wherein the desorbent is C5 hydrocarbon or C6 hydrocarbon. 23. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 10, further comprising: further comprising: cocurrently depressurizing the adsorption towers to discharge the paraffins retained in the adsorption towers before the rinsing. 24. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 10, further comprising: pressure equalization step at which the paraffin components present in the interior of the adsorption tower after the completion of the adsorbing step is transferred to the another adsorption tower which just completed the desorption step by connecting the two adsorption towers so that the pressure of the adsorption towers becomes equalized, and further includes a cocurrent depressurization step of discharging the paraffin components present in the adsorption towers after the pressure reduction through the pressure equalization step, and a pressurization step which pressurize the adsorption tower to the adsorption pressure by introducing the mixture gas of C4 olefins/paraffins into the adsorption tower partially pressurized through the pressure equalization step. 25. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 10, where the desorbent separated from the olefin/desorbent distillation tower and the paraffin/desorbent distillation tower is recycled into the adsorption tower. 26. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 10, wherein the olefin selective absorbent is selected among the π-complex adsorbent forming π-complex selectively with olefins, type X zeolite or type Y zeolite. 27. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 10, wherein the operating pressure of the adsorption tower is 1 to 10 atm (absolute pressure) and the temperature is 20 to 150° C. 28. The method for separating butene-1 from a mixture gas of C4 olefins/paraffins according to claim 10, wherein the desorbent is C5 hydrocarbon or C6 hydrocarbon.
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