Abstract:
Die Erfindung betrifft ein Verfahren zur destillativen Aufarbeitung eines Cyclododecatrien-haltigen Rohprodukts, das durch Verfahren zur Trimerisierung von Butadien erhalten wurde, zur Gewinnung des entsprechenden Cyclododecatrien-Reinprodukts. Die destillative Aufarbeitung wird jeweils in einer Trennwandkolonne, in der eine Trennwand in Kolonnenlängsrichtung unter Ausbildung eines oberen gemeinsamen Kolonnenbereichs, eines unteren gemeinsamen Kolonnenbereichs, eines Zulaufteils mit Verstärkungsteil und Abtriebsteil sowie eines Entnahmeteils mit Abtriebsteil und Verstärkungsteil ist, mit Zuführung des Cyclododecatrien-haltigen Rohprodukts im mittleren Bereich des Zulaufteils, Abführung einer Hochsiederfraktion aus dem Kolonnensumpf, einer Leichtsiederfraktion über den Kolonnenkopf und einer Mittelsiederfraktion aus dem mittleren Bereich des Entnahmeteils oder in thermisch gekoppelten Kolonnen durchgeführt.
Abstract:
Um eine Rektifikationskolonne bereitzustellen, die für eine Vielzahl von sehr unterschiedlichen Trennaufgaben bei der präparativen Trennung von kleinen Mengen an Flüssigkeitsgemischen, wie z.B. in einem Feinchemikalienlabor oder in einem wissenschaftlichen Labor einsetzbar ist, wird erfindungsgemäß eine Mikrorektifikationskolonne für die thermische Trennung von Flüssigkeiten vorgeschlagen, die mehrere in der Mikrorektifikationskolonne angeordnete, und den Kolonneninnenraum unterteilende Kolonnenböden aufweist, wobei die Mikrorektifikationskolonne weiterhin dadurch gekennzeichnet ist, daß sie ein Kolonnengehäuse und wenigstens einen Kolonneneinsatz umfaßt, wobei die Kolonnenböden an dem Kolonneneinsatz angeordnet sind, und wobei der Kolonneneinsatz entnehmbar im Kolonnengehäuse angeordnet ist. Mit der erfindungsgemäß vorgeschlagenen Mikrorektifikationskolonne können für mehrere verschiedene individuelle Trennaufgaben bessere Trennleistungen erzielt werden als mit einer herkömmlichen Rektifikationskolonne.
Abstract:
An improved de-entrainment device for use in distillation towers, especially vacuum distillation towers used for fractionating petroleum atmospheric resids comprises a baffle which is to be located in the portion of the tower below the feed zone and at the top of the flash zone. The baffle is in the form of an apertured plate above the stripping zone and in its preferred form comprises number of radial fins or blades, resembling a static fan with openings between the fins to permit vapors from the lower portions of the tower to pass upwards through the baffle with a minimal pressure drop. The fins of the baffle are preferably oriented at an angle between 30° and 60° away from the incoming feed so that the incoming feed stream skims over the top edges of the fins.
Abstract:
The invention relates to specific equipment and a specific process by which a diol can be stably produced on a scale of at least one ton per hour over a long period (of 1000 hours or longer). The process comprises feeding a raw material consisting of a cyclic carbonate and an aliphatic monohydric alcohol continuously into a continuous multi-stage distillation column (A) containing a catalyst therein to conduct reactive distillation, withdrawing a low-boiling reaction mixture (A T ) containing a formed dialkyl carbonate and the aliphatic monohydric alcohol continuously from the column top in a gas state, withdrawing a high-boiling reaction mixture (A B ) containing a formed diol continuously from the column bottom in a liquid state, feeding the high-boiling reaction mixture (A B ) continuously into a continuous multi-stage distillation column (C) of specific structure provided with a chimney tray having a liquid receiver and a side-cut withdrawing port set in the receiver, withdrawing continuously substances having lower boiling points than that of the diol as a top cut (C T ) and a side cut (Cs), and thus recovering the diol substantially free from substances having boiling points lower than that of the diol as a bottom cut (C B ).
Abstract translation:本发明涉及具体的设备以及可以长时间(1000小时以上)以每小时至少一吨的规模稳定地生产二醇的具体方法。 该方法包括将由环状碳酸酯和脂肪族一元醇组成的原料连续进料到含有催化剂的连续多级蒸馏塔(A)中进行反应蒸馏,取出低沸点反应混合物(A) T),其以气态从塔顶连续地形成含有形成的碳酸二烷基碳酸酯和脂族一元醇,将含有形成的二醇的高沸点反应混合物(A B B B)从 塔底处于液态,将高沸点反应混合物(A SUB B)连续进料到具有特殊结构的连续多级蒸馏塔(C)中,该塔具有带有液体接收器的烟囱式塔板 和设置在接收器中的侧向抽出口,连续地抽出比二醇的沸点低的物质作为顶切(CTA)和侧切(Cs),从而回收 二醇基本上 没有沸点低于二醇的沸点的物质作为底切(C B B)。
Abstract:
The invention relates to specific equipment and a specific process by which a high-purity diol can be stably produced on a scale of at least one ton per hour over a long period (of 1000 hours or longer). The process comprises feeding a raw material consisting of a cyclic carbonate and an aliphatic monohydric alcohol continuously into a continuous multi-stage distillation column (A) containing a catalyst therein to conduct reactive distillation, withdrawing a low-boiling reaction mixture (A T ) containing a formed dialkyl carbonate and the aliphatic monohydric alcohol from the column top continuously in a gas state, withdrawing a high-boiling reaction mixture (A B ) containing a formed diol from the column bottom continuously in a liquid state, feeding the high-boiling reaction mixture (A B ) continuously into a continuous multi-stage distillation column (C) to distill off substances having boiling points lower than that of the diol, feeding the obtained bottom component (C B ) continuously into a continuous multi-stage distillation column (E) of specific structure provided with a chimney tray of specific structure in the condensation section, and withdrawing the diol as a liquid (E S ) from a side-cut withdrawing port set in the lower portion of the chimney tray.
Abstract translation:本发明涉及具体的设备和具体方法,通过该方法可以在长时间(1000小时以上)下以每小时至少1吨的规模稳定地生产高纯度二醇。 该方法包括将由环状碳酸酯和脂肪族一元醇组成的原料连续地进料到含有催化剂的连续多级蒸馏塔(A)中进行反应蒸馏,取出低沸点反应混合物(A 含有形成的碳酸二烷基酯的碳酸二烷基酯和来自塔顶的脂族一元醇以气体状态连续地从气态中回收含有形成的二醇的高沸点反应混合物(A B B B) 塔底连续地处于液态,将高沸点反应混合物(A B B)连续进料到连续多级蒸馏塔(C)中,以蒸馏出沸点低于 二醇,将得到的底部成分(C B B)连续地进料到在冷凝部设置有特定结构的烟囱式塔板的特定结构的连续多级蒸馏塔(E)中, 从设置在烟囱式塔盘下部的侧面抽出口将二醇作为液体(E SUB S S)。
Abstract:
The invention aims at providing a specific process for mass production of dialkyl carbonate and diol by a reaction -distillation process of feeding a raw material consisting of a cyclic carbonate and an aliphatic monohydric alcohol continuously into a continuous multi-stage distillation column to conduct reaction and distillation simultaneously in the column, which enables long-time stable production of both with high selectivity and high productivity and long-time stable and efficient separation and purification of product dialkyl carbonate. It has been found that the production of dialkyl carbonate and diol with respective high selectivities of 95% or above and stable production of high-purity dialkyl carbonate on an industrial scale of at least two tons per hour over a long term of 1000 hours or longer in a high yield are attained by conducting the reaction and distillation in a continuous multi-stage distillation column (A) having a specific structure and separating the obtained overhead component (A T ) through distillation by the use of a continuous multi-stage distillation column (B) having a specific structure.
Abstract:
L'invention concerne un plateau interne, disposé dans une enceinte, comprenant une pluralité de poutres (1) parallèles, situées dans un même plan horizontal et fixées par leurs extrémités à la paroi de l'enceinte, et, entre ces poutres et supportées par celles-ci, des rangées de plaques (2) rectangulaires jointives, couvrant complètement l'espace entre les poutres, caractérisé par le fait que les bords d'appui (3) des plaques (2) par lesquels celles-ci reposent sur les poutres (1), sont pliés vers le bas par deux plis sensiblement à angle droit, et que chacun des bords (4) des plaques (2), perpendiculaires aux poutres (1), est plié de manière à former une partie femelle (4a) ou une partie mâle (4b) capable de s'emboîter respectivement dans une partie mâle (4b) ou femelle (4a) formée par le bord plié de la plaque adjacente, ainsi qu'une enceinte contenant un tel plateau.
Abstract:
A system for producing ethanol from an organic source that operates to purify and dry ethanol from a beer source. The system for producing substantially anhydrous ethanol includes: (a) a first distillation stripping column (11) that operates between 160 to 220 degrees F; (b) a second distillation rectifying column (15) having a higher operating temperature than said stripping column; (c) a molecular sieve dehydration device (21) in fluid communication with said rectifying column; and (d) an energy control element.
Abstract:
A mass transfer column (10) is provided with at least one vapor-liquid contact tray (12) that is disposed within the open internal region (14) defined by a shell (16) of the column (10). At least one expansion ring (26) underlies and supports the vapor-liquid contact tray (12). An expander (38) is associated with first and second end segments (32, 34) of the expansion ring (26) that define a cutout (36) in the expansion ring (26). The expander (38) includes brackets (48) welded to the end segments (32, 34) and a threaded member (50) that extends through the brackets (48) and carries nuts (54). Turning the nuts (54) against facing surfaces of the brackets (48) causes the first and second end segments (32, 34) of the expansion ring (26) to be forced apart to cause an increase in the circumference of the expansion ring (26), thereby sealing the expansion ring (26) against the inner surface of the column shell. At least one seal plate (58) is positioned on the threaded member (50) to block the cutout (36) in the expansion ring (26). Rods (27) extend between the expansion ring (26) and a support ring (24) that is welded to the column shell (16) to transfer a portion of the load carried by the expansion ring (26) to the support ring (24).