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101.发明申请Process for separating aromatics by extractive distillation and a composite solvent used therein 有权通过萃取蒸馏分离芳烃的方法和其中使用的复合溶剂公开(公告)号：US20030080028A1
公开(公告)日：2003-05-01
申请号：US10184751
申请日：2002-06-28
发明人： Longsheng Tian , Wencheng Tang , Ming Zhao , Yunming Zhang , Zhifeng Bian , Huixia Sun , Shijin Wu
IPC分类号： B01D003/00
摘要： This application relates to a composite solvent for separating aromatics by extractive distillation, comprising a main solvent, a solutizer and a modifier. Said solutizer is selected from any one or mixtures of any two of C8-C11 aromatics having different number of carbon atoms, the content of which is 3-39 wt %, and the number of carbon atoms of the lowest aromatic in the solutizer should be greater than that of the highest aromatic in the aromatics to be separated. When the solutizer is selected from any one of C8-C11 aromatics, the composite solvent contains 0.01-10.0 wt % of the modifier; when the solutizer is selected from mixtures of any two of C8-C11 aromatics having different number of carbon atoms, the composite solvent contains 0-10.0 wt % of the modifier. Said main solvent and modifier are independently selected from sulfolane derivatives, N-formyl morpholine, and N-methyl pyrrolidone, provided that the acidity and basicity of the modifier are opposite to those of the main solvent. When the composite solvent is used to recover aromatics by extractive distillation, it is possible to moderate the operation conditions of solvent recovery, increase the yield of aromatics, and make the separated aromatics to be neutral.
摘要翻译： 本申请涉及通过萃取蒸馏分离芳族化合物的复合溶剂，其包括主要溶剂，溶剂和改性剂。 所述溶剂选自具有不同碳原子数的C 8 -C 11芳族化合物的任何两种或其混合物，其含量为3-39重量％，并且溶剂中最低芳族化合物的碳原子数应为 大于待分离的芳族化合物中最高的芳族化合物。 当溶剂选自C8-C11芳烃中的任何一种时，复合溶剂含有0.01-10.0wt％的改性剂; 当溶剂选自具有不同碳原子数的C 2 -C 11芳族化合物的任何两种的混合物时，复合溶剂含有0-10.0重量％的改性剂。 所述主要溶剂和改性剂独立地选自环丁砜衍生物，N-甲酰基吗啉和N-甲基吡咯烷酮，条件是改性剂的酸度和碱度与主要溶剂的酸度和碱度相反。 当通过萃取蒸馏将复合溶剂用于回收芳族化合物时，可以调节溶剂回收的操作条件，提高芳族化合物的产率，并使分离的芳族化合物成为中性。
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公开(公告)号：US20030042125A1
公开(公告)日：2003-03-06
申请号：US10274155
申请日：2002-10-21
发明人： Fu-Ming Lee
IPC分类号： B01D003/34
CPC分类号： C10G7/08
摘要： A process for separating a feed mixture comprising at least one aromatic hydrocarbon and at least one non-aromatic hydrocarbon by extractive distillation (ED) utilizing a solvent mixture comprising sulfolane and at least one co-solvent. The co-solvent is an alkyl sulfolane having from 4 to 8 carbon atoms per molecule. The solvent mixture is added to the top of the ED column, and the feed mixture is added at a point on the ED column that is lower than the point where the solvent mixture is added. Extractive distillation is performed, and the aromatic and non-aromatic hydrocarbons are separated.
摘要翻译： 使用包含环丁砜和至少一种助溶剂的溶剂混合物通过萃取蒸馏（ED）分离包含至少一种芳族烃和至少一种非芳族烃的进料混合物的方法。 共溶剂是每分子具有4至8个碳原子的烷基环丁砜。 将溶剂混合物加入到ED柱的顶部，并将进料混合物加入到比添加溶剂混合物的点低的ED柱上。 进行萃取蒸馏，分离出芳族和非芳族烃。
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公开(公告)号：US06197163B1
公开(公告)日：2001-03-06
申请号：US08158240
申请日：1993-11-29
IPC分类号： B01D334
CPC分类号： C10G21/16 , C10G7/08 , C10G21/00 , C10G70/042
摘要： The impurity content, e.g. propionitrile, in a fraction containing C5 or C6 tertiary olefins obtained by cracking hydrocarbons is reduced by distilling with an alkanol and removing the impurity as a higher boiling point fraction.
摘要翻译： 杂质含量，例如 丙腈在含有通过裂解烃获得的C5或C6叔烯烃的馏分中通过用链烷醇蒸馏并除去作为较高沸点馏分的杂质而减少。
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公开(公告)号：US6005157A
公开(公告)日：1999-12-21
申请号：US75903
申请日：1998-05-11
摘要： Disclosed is a process for separating at least one cycloalkane containing 5-10 carbon atoms per molecule from at least one close-boiling alkane by extractive distillation of a feed consisting essentially of said at least one cycloalkane and said at least one alkane, the improvement comprising the use of certain pyrrolidones, certain morpholines, sulfoxides, sulfolanes, glycol compounds, or mixtures thereof, and optionally water; wherein said extractive distillation process produces (i) an overhead distillate product which contains a smaller volume percentage of said at least one cycloalkane and a larger volume percentage of said at least one alkane than said feed, and (ii) a bottoms product which contains said solvent and a larger volume percentage of said at least one cycloalkane and a smaller volume percentage of said at least one alkane than said feed; and wherein said at least one cycloalkane is separated from said solvent and recovered from said bottoms product.
摘要翻译： 公开了一种通过基本上由所述至少一种环烷烃和所述至少一种烷烃组成的进料的萃取蒸馏将至少一种每分子含有5-10个碳原子的至少一个环烷烃从至少一个接近沸点烷烃分离的方法，其改进包括 某些吡咯烷酮，某些吗啉，亚砜，环丁砜，二醇化合物或其混合物，以及任选的水的使用; 其中所述萃取蒸馏方法产生（i）包含所述至少一种环烷烃的体积百分比较小的所述塔烷馏出物产物和比所述进料更大体积百分数的所述至少一种烷烃，和（ii）含有所述至少一种环烷烃的塔底馏分产物， 所述至少一种环烷烃的体积百分比较大且所述至少一种烷烃的体积百分比较小; 并且其中所述至少一种环烷烃与所述溶剂分离并从所述底部产物中回收。
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105.发明授权
公开(公告)号：US5849982A
公开(公告)日：1998-12-15
申请号：US967185
申请日：1997-10-29
IPC分类号： C07C5/367 , B01D3/32 , C07C7/00 , C07C7/08 , C07C7/10 , C07C15/40 , C07C15/46 , C10G7/08 , B01D3/40 , C07C7/17
摘要： An extractive distillation process for separating at least one substituted unsaturated aromatic from a pyrolysis gasoline mixture, containing said aromatic and at least one close-boiling aromatic or non-aromatic hydrocarbon, employing a two part extractive solvent, the first part selected from propylene carbonate, sulfolane (tetramethylene sulfone), methyl carbitol, 1-methyl-2-pyrrolidinone, 2-pyrrolidinone and mixtures thereof, and the second portion consisting of water.
摘要翻译： 一种萃取蒸馏方法，用于使用两部分萃取溶剂从含有所述芳族和至少一种接近沸点的芳族或非芳族烃的裂解汽油混合物中分离至少一种取代的不饱和芳族化合物，所述第一部分选自碳酸亚丙酯， 环丁砜（四亚甲基砜），甲基卡必醇，1-甲基-2-吡咯烷酮，2-吡咯烷酮及其混合物，第二部分由水组成。
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公开(公告)号：US5252200A
公开(公告)日：1993-10-12
申请号：US766445
申请日：1991-09-26
摘要： The process for separating an aromatic from an entry hydrocarbon mixture also containing nonaromatics, by an extractive distillation method using an extractive distillation column with a selective solvent consisting essentially of an N-substituted Morpholine having substituents each of which contain no more than seven carbon atoms, includes distilling off the nonaromatics from the top of the extractive distillation column as a top product, drawing the aromatic and selective solvent from the extractive distillation column and subsequently separating the selective solvent from the aromatic in a separator column. The extractive distillation column is provided with an additional column portion for separation of a selective solvent residue from the separated nonaromatics without a separate top product distillation column. The hydrocarbon entry mixture is heated prior to admission to the extractive distillation column by an indirect heat exchange with selective solvent drawn from the separator column and heated to a temperature of from 130.degree. to 150.degree. C. to form a heated entry hydrocarbon mixture.
摘要翻译： 通过采用萃取蒸馏方法从萃取蒸馏法中分离含有非芳族化合物的进料烃混合物的方法，所述萃取蒸馏塔具有基本上由具有不超过7个碳原子的取代基的N-取代的吗啉组成的选择性溶剂， 包括将萃取蒸馏塔顶部的非芳族化合物作为顶部产物蒸馏，从萃取蒸馏塔中抽出芳族和选择性溶剂，随后在分离塔中将选择性溶剂与芳族化合物分离。 提取蒸馏塔具有另外的柱部分，用于在没有单独的顶部产物蒸馏塔的情况下将选择性溶剂残余物与分离的非芳族化合物分离。 烃入口混合物在进入萃取蒸馏塔之前通过与从分离塔中抽出的选择性溶剂进行间接热交换而被加热，并加热到130℃至150℃的温度以形成加热的入口烃混合物。
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107.发明授权Azeotropic distillation process for recovery of diamondoid compounds from hydrocarbon streams 失效用于从油气回收回收二氧化钛化合物的AZOOPOPIC蒸馏工艺
公开(公告)号：US5139621A
公开(公告)日：1992-08-18
申请号：US535633
申请日：1990-06-11
摘要： An azeotropic distillation method for separating diamondoids from a near-boiling solvent. The method is particularly useful for recovering diamondoids extracted from a produced natural gas stream via hydrocarbon solvent injection.
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108.发明授权Process for separating highly pure butene-1 or butene-1/isobutene mixture from C.sub.4 hydrocarbon fraction 失效从C4烃馏分分离高纯度丁烯-1或丁烯-1 /异丁烯混合物的方法
公开(公告)号：US4556461A
公开(公告)日：1985-12-03
申请号：US445974
申请日：1982-12-01
申请人： Shunichiro Ogura , Masamichi Soumai
发明人： Shunichiro Ogura , Masamichi Soumai
摘要： A process for separating a butene-1/isobutene mixture from a C.sub.4 hydrocarbon fraction is provided which comprises subjecting the C.sub.4 hydrocarbon fraction to extractive distillation using a polar solvent to separate components predominantly containing 1,3-butadiene as an extract and obtain an overhead containing butanes, butene-1, isobutene and butene-2 as main components and being substantially free from C.sub.3 -C.sub.4 diolefinic and acetylenic hydrocarbons, feeding the overhead into a first distillation column, removing isobutane as an overhead component from the first distillation column, feeding high-boiling components from the bottom of the first distillation column to a second distillation column, removing n-butane and butene-2 from the bottom of the second distillation column, and obtaining highly pure butene-1 and isobutene from its top. When isobutene contained in the overhead in the above process is removed in the form of tertiary butyl alcohol or tertiary butyl ether before it is fed into the first distillation column, highly pure butene-1 alone is obtained from the top of the second distillation column.
摘要翻译： 提供了一种从C4烃馏分中分离丁烯-1 /异丁烯混合物的方法，其包括使用极性溶剂对C4烃馏分进行萃取蒸馏以分离出主要含有1,3-丁二烯的组分作为萃取物，并获得含有 丁烷，丁烯-1，异丁烯和丁烯-2作为主要组分，并且基本上不含C 3 -C 4二烯烃和炔烃，将塔顶馏出物送入第一蒸馏塔，从第一蒸馏塔除去作为塔顶馏分的异丁烷，进料高 将组分从第一蒸馏塔的底部蒸发到第二蒸馏塔，从第二蒸馏塔的底部除去正丁烷和丁烯-2，并从其顶部获得高纯度的丁烯-1和异丁烯。 当将上述方法中的塔顶馏出物中所含的异丁烯在进料到第一蒸馏塔中之前，以叔丁醇或叔丁基醚的形式除去时，从第二蒸馏塔的顶部获得高纯度的丁烯-1。
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109.发明授权
公开(公告)号：US4401517A
公开(公告)日：1983-08-30
申请号：US323772
申请日：1981-11-20
申请人： Fu-Ming Lee
发明人： Fu-Ming Lee
摘要： A vapor-liquid extractive distillation process utilizing a dialkyl sulfone containing 4 to 8 carbon atoms per molecule and at least one percent water as the solvent. The process according to this invention is of particular applicability in separating aromatics from nonaromatics in a BTX stream. The solvent system operates particularly well with relatively large amounts of water.
摘要翻译： 使用每分子含有4至8个碳原子的二烷基砜和至少1％的水作为溶剂的气液萃取蒸馏方法。 根据本发明的方法特别适用于在BTX流中分离芳族化合物与非芳族化合物。 溶剂体系对相对大量的水进行特别好的操作。
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公开(公告)号：US4053369A
公开(公告)日：1977-10-11
申请号：US744857
申请日：1976-11-24
申请人： Martin R. Cines
发明人： Martin R. Cines
摘要： In a process of extractive distillation, the combination of operating with two liquid phases in at least the uppermost trays of the column, preferably while maintaining the column operation at substantially an optimum reflux ratio, results in increased efficiencies and minimum requirements for selective solvent.
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