Extractive distillation of hydrocarbon mixtures
    1.
    发明授权
    Extractive distillation of hydrocarbon mixtures 失效
    烃混合物的萃取蒸馏

    公开(公告)号:US5032232A

    公开(公告)日:1991-07-16

    申请号:US606690

    申请日:1990-10-31

    IPC分类号: B01D3/40 C07C7/08

    CPC分类号: B01D3/40 C07C7/08

    摘要: Extractive distillation processes for separating aromatic hydrocarbon(s) or cycloalkane(s) or alkene(s) from close-boiling alkane(s) are carried out with a solvent including at least one N-alkyl-2-thiopyrrolidone compound, preferably N-methyl-2-thiopyrrolidone. Optionally, the solvent additionally contains a cosolvent, preferably tetraethylene glycol or N-(.beta.-mercaptoethyl)-2-pyrrolidone or unsubstituted sulfolane.

    摘要翻译: 用于从近沸点烷烃分离芳族烃或环烷烃或烯烃的萃取蒸馏方法用包括至少一种N-烷基-2-硫代吡咯烷酮化合物的溶剂进行,优选N- 甲基-2-硫代吡咯烷酮。 任选地,溶剂另外含有共溶剂,优选四甘醇或N-(β-巯基乙基)-2-吡咯烷酮或未取代的环丁砜。

    Extractive distillation of mixtures containing aromatic and olefinic
hydrocarbons
    2.
    发明授权
    Extractive distillation of mixtures containing aromatic and olefinic hydrocarbons 失效
    含芳烃和烯烃的混合物的萃取蒸馏

    公开(公告)号:US5145562A

    公开(公告)日:1992-09-08

    申请号:US724049

    申请日:1991-07-01

    IPC分类号: B01D3/40 C07C7/08

    CPC分类号: C07C7/08 B01D3/40

    摘要: Aromatic hydrocarbons containing 6-10 carbon atoms per molecule are separated from close-boiling olefinic hydrocarbons by extractive distillation employing as solvent either N-methyl-2-thiopyrrolidone alone, or a mixture of N-(.beta.-mercaptoethyl)-2-pyrrolidone and N-methyl-2-thiopyrrolidone, or a mixture of N-(.beta.-mercaptoethyl)-2-pyrrolidone and N-methyl-2-pyrrolidone.

    摘要翻译: 每分子含有6-10个碳原子的芳族烃通过萃取蒸馏从接近沸点的烯烃中分离,使用单独的N-甲基-2-硫代吡咯烷酮或N-(β-巯基乙基)-2-吡咯烷酮和 N-甲基-2-硫代吡咯烷酮或N-(β-巯基乙基)-2-吡咯烷酮和N-甲基-2-吡咯烷酮的混合物。

    Separation of alkenes from alkanes
    3.
    发明授权
    Separation of alkenes from alkanes 失效
    烯烃与烷烃的分离

    公开(公告)号:US5085740A

    公开(公告)日:1992-02-04

    申请号:US604720

    申请日:1990-10-26

    IPC分类号: B01D3/40 C07C7/08

    CPC分类号: C07C7/08 B01D3/40

    摘要: An extractive distillation process for separating at least one C.sub.4 -C.sub.10 alkene (monoolefin) from at least one close-boiling alkane (paraffin) employs as solvent a mixture of (a) at least one N-alkyl-2-pyrrolidone, preferably N-methyl-2-pyrrolidone and either (b1) at least one sulfolane compound (preferably cyclotetramethylene sulfone) or (b2) at least one glycol compound (preferably tetraethylene glycol) or both (b1) and (b2).

    摘要翻译: 用于从至少一个接近沸点烷烃(石蜡)中分离至少一种C 4 -C 10烯烃(单烯烃)的萃取蒸馏方法使用(a)至少一种N-烷基-2-吡咯烷酮,优选N- 甲基-2-吡咯烷酮和(b1)至少一种环丁砜化合物(优选环四亚甲基砜)或(b2)至少一种二醇化合物(优选四甘醇)或二者(b1)和(b2)。

    Extractive distillation of alcohol/ether/hydrocarbon mixtures
    4.
    发明授权
    Extractive distillation of alcohol/ether/hydrocarbon mixtures 失效
    醇/醚/烃混合物的萃取蒸馏

    公开(公告)号:US5160414A

    公开(公告)日:1992-11-03

    申请号:US732981

    申请日:1991-07-19

    IPC分类号: B01D3/40 C07C41/42

    CPC分类号: B01D3/40 C07C41/42

    摘要: An extractive distillation process for separation ethers (in particular methyl t-butyl ether or ethyl t-butyl ether), aliphatic hydrocarbons (in particular isobutane and/or isobutene) and alcohols (in particular methanol or ethanol) employs as solvent sulfolane(s) and/or dialkyl sulfone(s), or N-(.beta.-mercaptoalkyl)-2-pyrrolidone(s), or a mixture of N-alkyl-2-pyrrolidone(s) and either sulfolane(s) or glycol compound(s).

    摘要翻译: 用于分离醚(特别是甲基叔丁基醚或乙基叔丁基醚),脂族烃(特别是异丁烷和/或异丁烯)和醇(特别是甲醇或乙醇)的萃取蒸馏方法用作溶剂环丁砜, 和/或二烷基砜或N-(β-巯基烷基)-2-吡咯烷酮,或N-烷基-2-吡咯烷酮和环丁砜或二醇化合物(s)的混合物 )。

    Separation of olefinic hydrocarbons by extractive distillation
    5.
    发明授权
    Separation of olefinic hydrocarbons by extractive distillation 失效
    通过萃取蒸馏分离烯烃

    公开(公告)号:US5151161A

    公开(公告)日:1992-09-29

    申请号:US731686

    申请日:1991-07-17

    IPC分类号: B01D3/40 C07C7/08

    CPC分类号: B01D3/40 C07C7/08

    摘要: The separation of alkadienes from close-boiling alkenes by extractive distillation employes as solvent N-methyl-2-thiopyrrolidone, alone or in admixture with unsubstituted sulfolane (cyclotetramethylene sulfone), or a mixture of unsubstituted sulfone and N-methyl-2-pyrrolidone. The separation of cycloalkadienes from close-boiling alkadienes by extractive distillation employs N-methyl-2-thiopyrrolidone as solvent.

    摘要翻译: 通过萃取蒸馏将烯二烯与近沸点烯烃的分离单独或与未取代的环丁砜(环四亚甲基砜)或未取代的砜和N-甲基-2-吡咯烷酮的混合物一起使用作为溶剂N-甲基-2-硫代吡咯烷酮。 通过萃取蒸馏分离环烯二烯与近沸点烯二酸,采用N-甲基-2-硫代吡咯烷酮作为溶剂。

    Separation of unsaturated hydrocarbons by extractive distillation
    6.
    发明授权
    Separation of unsaturated hydrocarbons by extractive distillation 失效
    通过萃取蒸馏分离不饱和烃

    公开(公告)号:US5154802A

    公开(公告)日:1992-10-13

    申请号:US731584

    申请日:1991-07-17

    IPC分类号: B01D3/40 C07C7/08

    CPC分类号: B01D3/40 C07C7/08

    摘要: The separation of alkadienes from close-boiling alkenes by extractive distillation employs as solvent either N-(.beta.-mercaptoethyl)-2-pyrrolidone alone, or a mixture of N-(.beta.-mercaptoethyl)-2-pyrrolidone and either N-methyl-2-pyrrolidone or cyclohexanol, or a mixture of cyclohexanol and tetraethylene glycol. The separation of cycloalkadines from close-boiling alkadienes by extractive distillation employs N-(.beta.-mercaptoethyl)-2-pyrrolidone as solvent.

    摘要翻译: 通过萃取蒸馏将烯二烯与近沸点烯烃的分离采用单独的N-(β-巯基乙基)-2-吡咯烷酮或N-(β-巯基乙基)-2-吡咯烷酮和N-甲基-2-吡咯烷酮的混合物作为溶剂, 2-吡咯烷酮或环己醇,或环己醇与四甘醇的混合物。 通过萃取蒸馏分离环烷烃与近沸点二烯烃采用N-(β-巯基乙基)-2-吡咯烷酮作为溶剂。

    Separation of monoolefins from paraffins
    8.
    发明授权
    Separation of monoolefins from paraffins 失效
    单链烯烃与石蜡的分离

    公开(公告)号:US5068011A

    公开(公告)日:1991-11-26

    申请号:US604719

    申请日:1990-10-26

    IPC分类号: C07C7/08

    CPC分类号: C07C7/08

    摘要: An extractive distillation process for separating at least one C.sub.4 -C.sub.10 alkene (monoolefin) from at least one close-boiling alkane employs solvent at least one N-mercaptoalkyl-2-pyrrolidone, preferably N-(.beta.-mercaptoethyl)-2-pyrrolidone, optionally in admixture with at least one N-alkyl-2-pyrrolidone, preferably N-methyl-2-pyrrolidone.

    摘要翻译: 用于从至少一个接近沸点烷烃分离至少一种C 4 -C 10烯烃(单烯烃)的萃取蒸馏方法使用溶剂至少一种N-巯基烷基-2-吡咯烷酮,优选N-(β-巯基乙基)-2-吡咯烷酮, 任选地与至少一种N-烷基-2-吡咯烷酮,优选N-甲基-2-吡咯烷酮混合。

    Separation of alkenes from close-boiling alkanes
    9.
    发明授权
    Separation of alkenes from close-boiling alkanes 失效
    从近沸点烷烃中分离烯烃

    公开(公告)号:US5100515A

    公开(公告)日:1992-03-31

    申请号:US604737

    申请日:1990-10-26

    IPC分类号: B01D3/40 C07C7/08

    CPC分类号: B01D3/40 C07C7/08

    摘要: An extractive distillation process for separatin at least one C.sub.4 -C.sub.10 alkene (monoolefin) from at least one close-boiling alkane employs a solvent mixture of (a) at least one saturated alcohol (preferably cyclohexanol) and either (b1) at least one sulfolane (preferably cyclotetramethylene sulfone) or (b2) at least one glycol compound (preferably tetraethylene glycol) or (b1)+(b2).

    摘要翻译: 用于从至少一个接近沸点烷烃分离至少一种C 4 -C 10烯烃(单烯烃)的萃取蒸馏方法采用(a)至少一种饱和醇(优选环己醇)和(b1)至少一种环丁砜的溶剂混合物 (优选环四亚甲基砜)或(b2)至少一种二醇化合物(优选四甘醇)或(b1)+(b2)。