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公开(公告)号：US5372009A
公开(公告)日：1994-12-13
申请号：US149495
申请日：1993-11-09
IPC分类号： B01D3/14 , C07C7/04 , C07C7/09 , C07C11/04 , C07C11/06 , C10G5/06 , C10G7/00 , C10G70/04 , F25J3/02
CPC分类号： C10G70/04 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0242 , F25J3/0247 , F25J3/0252 , F25J2200/76 , F25J2200/80 , F25J2210/12 , F25J2215/62 , F25J2215/64 , F25J2230/08 , F25J2230/20 , F25J2230/60 , F25J2240/30
摘要： A cryogenic technique for recovering pure products from a mixture of at least three close-boiling components. A preferred process is provided for separating a hydrocarbon mixture containing an alkene (i.e. ethene or propene), corresponding alkane having the same number of carbon atoms and at least one heavier hydrocarbon component. The improved process comprises: feeding the hydrocarbon mixture to a first distillation tower having an upper reflux stage; recovering a first overhead vapor stream rich in alkene and alkane from the first distillation tower and passing the first overhead vapor stream to a middle distillation stage of a second multi-stage distillation tower; recovering a second overhead vapor stream rich in alkene from the second distillation tower; adiabatically compressing the alkene-rich vapor stream and passing the compressed vapor to a second distillation tower reboiler stage. This provides a heat pump for cooling and condensing the compressed vapor and heating a liquid reboiler stream. Pressure in the alkene stream is reduced by flashing cooled and condensed vapor from the reboiler stage to provide a partially vaporized flashed mixture stream rich in alkene, followed by recovering and separating the flashed mixture stream to provide recovering a liquid portion and vapor portion. The liquid portion is passed to a second distillation tower reflux stage and a pure alkene stream is recovered.
摘要翻译： 用于从至少三个接近沸点组分的混合物中回收纯产品的低温技术。 提供了一种优选的方法，用于分离含有烯烃（即乙烯或丙烯），具有相同碳原子数的相应烷烃和至少一种较重烃组分的烃混合物。 改进的方法包括：将烃混合物进料到具有上部回流阶段的第一蒸馏塔; 从第一蒸馏塔回收富含烯烃和烷烃的第一塔顶蒸气物流，并将第一塔顶蒸气流送至第二多级蒸馏塔的中间蒸馏阶段; 从第二蒸馏塔回收富含烯烃的第二塔顶蒸气物流; 绝热压缩富烯烃蒸气流并将压缩的蒸气送至第二蒸馏塔再沸器阶段。 这提供了用于冷却和冷凝压缩蒸气并加热液体再沸器流的热泵。 通过从再沸器阶段闪蒸冷却和冷凝的蒸气来减少烯烃流中的压力，以提供富含烯烃的部分蒸发的闪蒸混合物流，随后回收和分离闪蒸的混合物物流以提供回收液体部分和蒸气部分。 将液体部分通入第二蒸馏塔回流阶段并回收纯的烯烃物流。
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公开(公告)号：US5573645A
公开(公告)日：1996-11-12
申请号：US496562
申请日：1995-06-29
CPC分类号： B01D3/146 , C07C7/04 , Y10S203/08 , Y10S203/09 , Y10S585/91
摘要： A distillation process and apparatus for recovering high purity aromatic products from a mixed aromatic hydrocarbon feedstock containing benzene, toluene and xylene by use of distillation towers integrated by heat exchange whereby substantial savings in operating costs and apparatus costs are realized. The distillation apparatus includes a benzene distillation tower and heat exchanger, a first toluene distillation tower and external heater, a second toluene distillation tower and heat exchanger and a xylene distillation tower and external heater, whereby the benzene distillation tower and heat exchanger are operably connected to the first toluene distillation tower and external heater and the second toluene distillation tower and heat exchanger are operably connected to the xylene distillation tower and external heater. A feature of the integrated method and apparatus is the utilization of the overhead fraction from the first toluene distillation tower as the source of reboil heat in the benzene distillation tower, and the utilization of the overhead fraction from the xylene distillation tower as the source of reboil heat in the second toluene distillation tower. Another feature of the integrated method and apparatus of the invention is the operation of the first toluene distillation tower at an elevated temperature and pressure and the operation of the second toluene distillation at a lower temperature and pressure.
摘要翻译： 一种用于通过使用通过热交换集成的蒸馏塔从含有苯，甲苯和二甲苯的混合芳族烃原料中回收高纯度芳族化合物的蒸馏方法和装置，从而实现运行成本和设备成本的显着节省。 蒸馏装置包括苯蒸馏塔和热交换器，第一甲苯蒸馏塔和外部加热器，第二甲苯蒸馏塔和热交换器以及二甲苯蒸馏塔和外部加热器，由此苯蒸馏塔和热交换器可操作地连接到 第一甲苯蒸馏塔和外部加热器和第二甲苯蒸馏塔和热交换器可操作地连接到二甲苯蒸馏塔和外部加热器。 综合方法和装置的特点是利用来自第一甲苯蒸馏塔的塔顶馏分作为苯蒸馏塔中的再沸热源，利用来自二甲苯蒸馏塔的塔顶馏分作为再沸的来源 在第二甲苯蒸馏塔中加热。 本发明的一体化方法和装置的另一个特征是在升高的温度和压力下操作第一甲苯蒸馏塔，并在较低的温度和压力下操作第二甲苯蒸馏。
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3.发明授权Increased conversion of C.sub.2 -C.sub.12 aliphatic hydrocarbons to aromatic hydrocarbons using a highly purified recycle stream 失效使用高度纯化的再循环物流增加C2-C12脂族烃转化为芳烃
公开(公告)号：US5186908A
公开(公告)日：1993-02-16
申请号：US565009
申请日：1990-08-09
IPC分类号： C07C2/00
CPC分类号： C07C2/00 , C07C2529/40 , C07C2529/65 , C07C2529/70
摘要： An improved aromatization apparatus is disclosed in which conversion is increased by recycling a highly purified C.sub.2 -C.sub.4 aliphatic stream. Loss of valuable ethane to fuel gas is substantially eliminated. In a preferred embodiment, a dephlegmator purifies the C.sub.2 -C.sub.4 recycle stream.
摘要翻译： 公开了一种改进的芳构化装置，其中通过再循环高纯度的C2-C4脂族物流来提高转化率。 燃料气体的有价值乙烷的损失大大消除。 在优选的实施方案中，分馏塔净化C2-C4再循环流。
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公开(公告)号：US4727122A
公开(公告)日：1988-02-23
申请号：US903541
申请日：1986-09-04
CPC分类号： C08J11/02
摘要： There is disclosed a process for recovering olefin monomers, e.g., C.sub.3 -C.sub.10 alpha-olefins, from a vent gas of a vapor phase process for polymerizing olefins. The method comprises passing the vent gas, obtained by purging a resin produced in the polymerization process with an inert gas, such as nitrogen, into contact with an adsorbent to effect the adsorption of an olefin monomer. Subsequently, the adsorbed monomer is removed by contacting the adsorbent with a second monomer having lower molecular weight than the adsorbed monomer.
摘要翻译： 公开了从用于聚合烯烃的气相方法的排出气体中回收烯烃单体例如C 3 -C 10α-烯烃的方法。 该方法包括将通过在聚合过程中产生的树脂用氮气等惰性气体吹扫而获得的排放气体与吸附剂接触以实现烯烃单体的吸附。 随后，通过使吸附剂与分子量低于吸附单体的第二单体接触来除去吸附的单体。
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公开(公告)号：US5768913A
公开(公告)日：1998-06-23
申请号：US843448
申请日：1997-04-16
IPC分类号： F25J3/02
CPC分类号： F25J3/0238 , F25J3/0219 , F25J3/0233 , F25J3/0252 , F25J2200/74 , F25J2200/80 , F25J2205/04 , F25J2210/12 , F25J2215/62 , F25J2270/02 , F25J2270/06 , F25J2270/60
摘要： A process and system for providing cooling service (refrigerant) for a gas separation process wherein the refrigerant is obtained from the system process fluid and after serving as refrigerant is returned to the process side for separation into product.
摘要翻译： 一种用于提供用于气体分离过程的冷却服务（制冷剂）的方法和系统，其中制冷剂从系统工艺流体获得并且用作制冷剂之后返回到处理侧以分离成产品。
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6.发明授权Increased conversion of C.sub.2 -C.sub.12 aliphatic hydrocarbons to aromatic hydrocarbons using a highly purified recycle stream 失效使用高度纯化的再循环物流增加C2-C12脂族烃转化为芳烃
公开(公告)号：US4996381A
公开(公告)日：1991-02-26
申请号：US254556
申请日：1988-10-07
IPC分类号： C07C2/00
CPC分类号： C07C2/00 , C07C2529/40 , C07C2529/65 , C07C2529/70
摘要： An improved aromatization process is disclosed in which conversion is increased by recycling a highly purified C.sub.2 -C.sub.4 aliphatic stream. Loss of valuable ethane to fuel gas is substantially eliminated. In a preferred embodiment, a dephlegmator purifies the C.sub.2 -C.sub.4 recycle stream.
摘要翻译： 公开了一种改进的芳构化方法，其中通过再循环高纯度的C2-C4脂族物流来提高转化率。 燃料气体的有价值乙烷的损失大大消除。 在优选的实施方案中，分馏塔净化C2-C4再循环流。
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公开(公告)号：US4900347A
公开(公告)日：1990-02-13
申请号：US333214
申请日：1989-04-05
IPC分类号： F25J3/02
CPC分类号： F25J3/0242 , F25J3/0219 , F25J3/0233 , F25J3/0238 , F25J3/0252 , F25J2200/80 , F25J2210/12 , F25J2270/04 , F25J2270/60 , F25J2290/80
摘要： A cyrogenic technique for recovering ethene from a gaseous mixture containing methane, ethane, etc. Operating methods and apparatus are provided for passing the gas feed through a chilling train having a series of dephlegmator-type exchange units to condense liquid rich in ethene and ethane, while separating a major portion of methane and lighter gas. A multizone demethanizer removes condensed methane from the C.sub.2 fraction to provide a pure product economically.
摘要翻译： 用于从含有甲烷，乙烷等的气体混合物中回收乙烯的甲基化技术提供操作方法和装置，用于使气体进料通过具有一系列分馏器型交换单元的冷却列车，以冷凝富含乙烯和乙烷的液体， 同时分离出主要部分的甲烷和较轻的气体。 多区域脱甲烷塔从C2馏分中除去冷凝的甲烷，以经济地提供纯净的产物。
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