Low-energy extractive distillation process for dehydration of aqueous ethanol
    1.
    发明授权
    Low-energy extractive distillation process for dehydration of aqueous ethanol 有权
    用于乙醇水溶液脱水的低能萃取蒸馏方法

    公开(公告)号:US08002953B2

    公开(公告)日:2011-08-23

    申请号:US11827896

    申请日:2007-07-13

    摘要: An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation.

    摘要翻译: 从含有任何范围的乙醇的含水/乙醇进料中生产无水乙醇的节能萃取蒸馏方法采用在没有或大大降低的液体回流条件下运行的萃取蒸馏塔(EDC)。 EDC可以并入用于从发酵液中生产用于汽油混合的无水乙醇的整合方法。 通过使用高沸点萃取蒸馏溶剂,即使在没有液体回流条件下,没有溶剂被气相夹带到EDC塔顶馏出物中。 通过限制EDC中的乙醇回收,可以进一步提高EDC的能量需求和严重程度。 在该部分乙醇回收设计中,保留在来自EDC的水流中的乙醇在后蒸馏塔中回收,或将水流循环至前端预蒸馏塔,其中乙醇容易回收,因为VLE曲线 对于乙醇/水非常有利于蒸馏。

    Apparatus for catalytic distillation processes
    2.
    发明授权
    Apparatus for catalytic distillation processes 有权
    催化蒸馏工艺装置

    公开(公告)号:US07909966B2

    公开(公告)日:2011-03-22

    申请号:US11266124

    申请日:2005-11-02

    IPC分类号: B01D3/20 B01D3/22 B01J8/04

    摘要: The invention disclosed relates to catalytic distillation column internals providing improved liquid reaction mixture and catalyst contacting for simultaneous catalytic reaction and separation of the reaction mixture. The invention is an improved catalytic distillation apparatus providing optimum balance of catalytic reaction and mass transfer steps, wherein distribution, mixing and feeding of liquid reaction mixture to the reaction zone and distillation section are better controlled and more uniformly applied. At least one catalyst bed is situated in at least one receiving pan of a distillation tray so that the tray performs the functions of both of the reaction section and the distillation section of the catalytic distillation column simultaneously within a stage.

    摘要翻译: 所公开的本发明涉及提供改进的液体反应混合物和催化剂接触以用于同时催化反应和分离反应混合物的催化蒸馏塔内部物质。 本发明是提供催化反应和传质步骤的最佳平衡的改进的催化蒸馏装置,其中液体反应混合物向反应区和蒸馏段的分配,混合和进料被更好地控制和更均匀地施加。 至少一个催化剂床位于蒸馏托盘的至少一个接收盘中,使得塔板在一个阶段内同时执行催化蒸馏塔的反应段和蒸馏段的功能。

    Apparatus for catalytic distillation processes
    3.
    发明申请
    Apparatus for catalytic distillation processes 有权
    催化蒸馏工艺装置

    公开(公告)号:US20070095646A1

    公开(公告)日:2007-05-03

    申请号:US11266124

    申请日:2005-11-02

    IPC分类号: B01D3/14 B01J8/02

    摘要: The invention disclosed relates to catalytic distillation column internals providing improved liquid and catalyst contacting for simultaneous catalytic reaction and separation of the reaction mixture. The invention provides an improved catalytic distillation system providing optimum balance of catalytic reaction and mass transfer steps, wherein distribution, mixing and application of liquid to the reaction zone and separation zones is better controlled and more uniformly applied. At least one catalyst bed is situated in at least one receiving pan of a distillation tray so that said tray performs the functions of both of the reaction section and the separation section of the catalytic distillation column simultaneously within a stage.

    摘要翻译: 所公开的本发明涉及提供改进的液体和催化剂接触以用于同时催化反应和分离反应混合物的催化蒸馏塔内部物质。 本发明提供改进的催化蒸馏系统,其提供催化反应和传质步骤的最佳平衡,其中液体分配,混合和施加到反应区和分离区被更好地控制和更均匀地施加。 至少一个催化剂床位于蒸馏盘的至少一个容纳盘中,使得所述塔在阶段内同时执行催化蒸馏塔的反应段和分离段的功能。

    Integrated process for removing benzene from gasoline and producing cyclohexane
    5.
    发明申请
    Integrated process for removing benzene from gasoline and producing cyclohexane 有权
    从汽油中除去苯并生产环己烷的综合工艺

    公开(公告)号:US20070299294A1

    公开(公告)日:2007-12-27

    申请号:US11475304

    申请日:2006-06-27

    IPC分类号: C07C7/17

    摘要: An integrated, continuous process for transforming feedstock, e.g., reformate, which contains high levels of benzene into a low-benzene content feedstock that is suitable for gasoline blending initially removes benzene from the reformate by extractive distillation, then partially hydrogenating the high purity benzene into cyclohexane under mild conditions in a one-stage hydrogenation reactor, and thereafter recovering a cyclohexane product with high purity from the hydrogenation reactor effluent in a back-end purification step using extractive distillation. The initial or front-end separation step yields a low-benzene content reformate.

    摘要翻译: 将含有高含量苯的高含量苯转化为适用于汽油混合的低苯含量原料的重整产品的综合连续方法最初通过萃取蒸馏从重整产物中除去苯,然后将高纯度苯部分氢化 环己烷在一级氢化反应器中的温和条件下,然后使用萃取蒸馏在后端纯化步骤中从氢化反应器流出物回收高纯度的环己烷产物。 初始或前端分离步骤产生低苯含量的重整产物。

    Low-energy extractive distillation process for dehydration of aqueous ethanol
    7.
    发明授权
    Low-energy extractive distillation process for dehydration of aqueous ethanol 失效
    用于乙醇水溶液脱水的低能萃取蒸馏方法

    公开(公告)号:US08172987B2

    公开(公告)日:2012-05-08

    申请号:US13184540

    申请日:2011-07-17

    摘要: An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent, is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation.

    摘要翻译: 从含有任何范围的乙醇的含水/乙醇进料中生产无水乙醇的节能萃取蒸馏方法采用在没有或大大降低的液体回流条件下运行的萃取蒸馏塔(EDC)。 EDC可以并入用于从发酵液中生产用于汽油混合的无水乙醇的整合方法。 通过使用高沸点萃取蒸馏溶剂,即使在没有液体回流条件下,也没有溶剂被气相夹带到EDC塔顶馏出物中。 通过限制EDC中的乙醇回收,可以进一步提高EDC的能量需求和严重程度。 在该部分乙醇回收设计中,保留在来自EDC的水流中的乙醇在后蒸馏塔中回收,或将水流循环至前端预蒸馏塔,其中乙醇容易回收,因为VLE曲线 对于乙醇/水非常有利于蒸馏。

    Novel Methods for Regeneration of Solvents for Extractive Processes
    8.
    发明申请
    Novel Methods for Regeneration of Solvents for Extractive Processes 有权
    用于萃取过程溶剂再生的新方法

    公开(公告)号:US20120037542A1

    公开(公告)日:2012-02-16

    申请号:US12854150

    申请日:2010-08-10

    IPC分类号: C10G21/28

    摘要: An improved solvent regeneration system for extractive distillation and liquid-liquid extraction processes capable of effectively removing heavy hydrocarbons and polymeric materials that otherwise develop in a closed solvent loop. The improved process employs a light hydrocarbon displacement agent, which is at least partially soluble in the solvent to squeeze the heavy hydrocarbons and polymeric materials out of the solvent, with virtually no additional energy requirement. It has been demonstrated that the light non-aromatic hydrocarbons in the raffinate stream generated from the extractive distillation or the liquid-liquid extractive process for aromatic hydrocarbons recovery can displace not only the heavy non-aromatic hydrocarbons but also the heavy aromatic hydrocarbons from the extractive solvent, especially when the aromatic hydrocarbons in the solvent are in the C10+ molecular weight range.

    摘要翻译: 用于萃取蒸馏和液 - 液萃取方法的改进的溶剂再生系统,其能够有效地除去否则在密闭的溶剂回路中发展的重质烃和聚合材料。 改进的方法采用轻质烃置换剂,其至少部分可溶于溶剂以将重质烃和聚合物材料挤出溶剂,实际上无需额外的能量需求。 已经证明,从萃取蒸馏或用于芳族烃回收的液 - 液萃取过程产生的萃余液流中的轻非芳族烃不仅可以取代重非芳族烃,而且可以取代萃取物中的重芳香烃 溶剂,特别是当溶剂中的芳烃为C10 +分子量范围时。

    Low-Energy Extractive Distillation Process for Dehydration of Aqueous Ethanol
    9.
    发明申请
    Low-Energy Extractive Distillation Process for Dehydration of Aqueous Ethanol 失效
    用于脱水乙醇的低能量萃取蒸馏法

    公开(公告)号:US20110266134A1

    公开(公告)日:2011-11-03

    申请号:US13184540

    申请日:2011-07-17

    IPC分类号: C07C29/84

    摘要: An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent, is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation.

    摘要翻译: 从含有任何范围的乙醇的含水/乙醇进料中生产无水乙醇的节能萃取蒸馏方法采用在没有或大大降低的液体回流条件下运行的萃取蒸馏塔(EDC)。 EDC可以并入用于从发酵液中生产用于汽油混合的无水乙醇的整合方法。 通过使用高沸点萃取蒸馏溶剂,即使在没有液体回流条件下,也没有溶剂被气相夹带到EDC塔顶馏出物中。 通过限制EDC中的乙醇回收,可以进一步提高EDC的能量需求和严重程度。 在该部分乙醇回收设计中,保留在来自EDC的水流中的乙醇在后蒸馏塔中回收,或将水流循环至前端预蒸馏塔,其中乙醇容易回收,因为VLE曲线 对于乙醇/水非常有利于蒸馏。

    Low-energy extractive distillation process for dehydration of aqueous ethanol
    10.
    发明申请
    Low-energy extractive distillation process for dehydration of aqueous ethanol 有权
    用于乙醇水溶液脱水的低能萃取蒸馏方法

    公开(公告)号:US20090014313A1

    公开(公告)日:2009-01-15

    申请号:US11827896

    申请日:2007-07-13

    IPC分类号: C07C31/08

    摘要: An energy-efficient extractive distillation process for producing anhydrous ethanol from aqueous/ethanol feeds containing any range of ethanol employs an extractive distillation column (EDC) that operates under no or greatly reduced liquid reflux conditions. The EDC can be incorporated into an integrated process for producing anhydrous ethanol used for gasoline blending from fermentation broth. By using a high-boiling extractive distillation solvent, no solvent is entrained by the vapor phase to the EDC overhead stream, even under no liquid reflux conditions. The energy requirement and severity of the EDC can be further improved by limiting ethanol recovery in the EDC. In this partial ethanol recovery design, ethanol which remains in the aqueous stream from the EDC is recovered in a post-distillation column or the aqueous stream is recycled to a front-end pre-distillation column where the ethanol is readily recovered since the VLE curve for ethanol/water is extremely favorable for distillation.

    摘要翻译: 从含有任何范围的乙醇的含水/乙醇进料中生产无水乙醇的节能萃取蒸馏方法采用在没有或大大降低的液体回流条件下运行的萃取蒸馏塔(EDC)。 EDC可以并入用于从发酵液中生产用于汽油混合的无水乙醇的整合方法。 通过使用高沸点萃取蒸馏溶剂,即使在没有液体回流条件下,没有溶剂被气相夹带到EDC塔顶馏出物中。 通过限制EDC中的乙醇回收,可以进一步提高EDC的能量需求和严重程度。 在该部分乙醇回收设计中,保留在来自EDC的水流中的乙醇在后蒸馏塔中回收,或将水流循环至前端预蒸馏塔,其中乙醇容易回收,因为VLE曲线 对于乙醇/水非常有利于蒸馏。