JP2615424B2 - Falling-film catalysis method and apparatus - Google Patents

Falling-film catalysis method and apparatus

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JP2615424B2
JP2615424B2 JP11235194A JP11235194A JP2615424B2 JP 2615424 B2 JP2615424 B2 JP 2615424B2 JP 11235194 A JP11235194 A JP 11235194A JP 11235194 A JP11235194 A JP 11235194A JP 2615424 B2 JP2615424 B2 JP 2615424B2
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catalyst
reaction
product
liquid phase
film
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JPH07313865A (en )
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卓也 土井
忠良 田中
孝博 藤井
工 高島
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工業技術院長
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J19/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J19/24Stationary reactors without moving elements inside
    • B01J19/247Suited for forming thin films
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J16/00Chemical processes in general for reacting liquids with non- particulate solids, e.g. sheet material; Apparatus specially adapted therefor
    • B01J16/005Chemical processes in general for reacting liquids with non- particulate solids, e.g. sheet material; Apparatus specially adapted therefor in the presence of catalytically active bodies, e.g. porous plates
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J2219/00Chemical, physical or physico-chemical processes in general; Their relevant apparatus
    • B01J2219/18Details relating to the spatial orientation of the reactor
    • B01J2219/187Details relating to the spatial orientation of the reactor inclined at an angle to the horizontal or to the vertical plane

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【産業上の利用分野】本発明は、触媒と熱を利用して液相の反応物から、有用な生成物を得る反応方法および反応装置に関し、特に、吸熱・発熱反応を利用した熱の昇温技術の吸熱過程における反応方法および反応装置に関するものである。 BACKGROUND OF THE INVENTION The present invention is, from the reaction product of using a catalyst and heat the liquid phase, relates reaction method and reactors to obtain useful products, in particular, the heat using endothermic-exothermic reaction Noboru it relates reaction method and reactors in an endothermic process of temperature techniques.

【0002】 [0002]

【従来の技術】従来、触媒を用いた液相反応物の分解反応を行う場合の代表例は図4のようになる。 Conventionally, a typical example of a case where the decomposition reaction of the liquid phase reaction using a catalyst is as shown in FIG. 図4において、1は反応槽、2は蒸留塔、3は冷却器、Qは加熱用の供給熱、Sは前記反応槽1内の溶液、WPは触媒粒子、Vは前記反応槽1から蒸留塔2へ入る蒸気、Lは前記蒸留塔2から反応槽1へ戻る反応液、Dは外部へ取り出される液または蒸気、Fは外部より注入される液または蒸気である。 4, 1 is the reaction vessel, 2 is the distillation column, 3 coolers, Q is the heat supplied for heating, S is a solution of said reaction tank 1, WP catalyst particles, V is distilled from the reaction vessel 1 steam entering the tower 2, L reaction solution returning from the distillation column 2 to the reaction tank 1, D is a liquid or steam is taken out to the outside, F is a liquid or vapor is injected from the outside.

【0003】触媒粒子WPは反応槽1内の液相に懸濁した状態で使用される。 [0003] The catalyst particles WP is used in a state suspended in the liquid phase in the reactor 1. 反応槽1内では触媒粒子WPと供給熱Qの作用により、液相反応物から凝縮性ガスまたは不凝縮性ガスの生成物が得られる。 By the action of heat supplied Q and the catalyst particles WP in the reaction tank 1, the product of condensable gases or non-condensable gas is obtained from the liquid phase reaction.

【0004】一般に、液相反応の場合、反応物が全て反応して生成物になることは少なく、生成物が蓄積し、化学平衡に達した時点で反応は進まなくなるが、生成物を連続的に取り除くことで反応を持続することができる。 In general, in the case of liquid phase reaction, the reaction product is the product react all small, product accumulates, the reaction upon reaching the chemical equilibrium is not proceed, continuous product it is possible to sustain the reaction by removing the.
生成物を連続的に取り除く手段として、反応物と生成物の沸点差を利用して分離ができる蒸留塔が用いられている。 As a means for removing the product continuously distilling column is used that can separate by utilizing the difference in boiling point of the reactants and products. 触媒を液相に懸濁させるこのような方法は、粉末状の触媒を用いて、触媒と反応物の接触面積を大きくできるなどの利点がある。 Such a method of suspending the catalyst in the liquid phase, using a powdery catalyst, there are advantages such as the contact area of ​​the catalyst and reactants can be increased.

【0005】 [0005]

【発明が解決しようとする課題】触媒反応を効率よく行うためには、触媒表面から生成物が速やかに離脱し、触媒の周囲で生成物の濃度が小さいことが化学平衡論的に必要である。 The INVENTION It is an object of the catalytic reaction in order to perform efficiently, the product from the catalyst surface is disengaged quickly, it is necessary to chemical equilibrium theory that the concentration of the product is small around the catalyst . しかしながら、上記従来法では、触媒粒子WPを反応槽1内に懸濁させる方法を採るために、反応溶液中の触媒表面で生成した生成物は、気相界面まで溶液S中を上昇していかなければならない。 However, in the conventional method, in order to take the process to suspend the catalyst particles WP in the reaction vessel 1, the product produced in the catalyst surface in the reaction solution, Ika rises the solution S to the air interface There must be. 従って、溶液S内で相対的に上方にある触媒粒子WPは、相対的に下方にある触媒粒子WPで生成した生成物が上昇してくるために、その周囲での生成物の濃度が高くなり、触媒本来の反応速度を達成できない。 Accordingly, the catalyst particles WP in relatively upward in solution S is, for products formed by catalyst particles WP in relatively downward come rises, the higher the concentration of the product in the surrounding , it can not be achieved the catalyst original reaction rate. 更に、溶液S中の生成物を速やかに気相へ追い出すためには、多量の熱を加えてやる必要がある。 Additionally, rapidly the product in the solution S to drive off into the gas phase, it is necessary to'll adding a large amount of heat. そのため、供給熱Qが反応に有効に利用されないという重大な課題があった。 Therefore, there is a serious problem that the heat supplied Q can not be effectively utilized in the reaction.

【0006】本発明の目的は、反応により生成された物質が速やかに離脱できるようにして、反応速度の向上をはかった流下薄膜式触媒反応方法および装置を提供することにある。 An object of the present invention is to provide substances produced by the reaction is to be detached quickly, is to provide a falling film catalysis method and apparatus thereby improving the reaction rate.

【0007】 [0007]

【課題を解決するための手段】本発明にかかる流下薄膜式触媒反応方法は、液相の反応物を薄い膜状にして触媒と接触させて熱反応させ、生成物を液相から離脱させることによって生成物を得るようにしたものである。 Means for Solving the Problems] falling film catalysis methods according to the present invention, that the reaction in the liquid phase in thin film form is contacted with the catalyst is thermally react, disengaging the product from the liquid phase it is obtained so as to obtain a product by.

【0008】また、液相反応物を傾けられた触媒の面における流路となすことによって薄膜状にしたものである。 [0008] is obtained by a thin film by forming a channel in the plane of the catalyst which is inclined to the liquid phase reaction.

【0009】さらに、触媒を液相反応物の組成に対応させて流路に沿って2種類以上配置したものである。 Furthermore, those arranged catalyze in correspondence with the composition of the liquid phase reactants along the flow path 2 or more.

【0010】また、触媒を単一触媒あるいは混合触媒にしたものである。 [0010] in which catalyzed the single catalyst or catalyst mixture.

【0011】さらに、本発明にかかる流下薄膜式触媒反応装置は、面状の触媒層と、この触媒層上に液相反応物を薄い膜状にして触媒と接触させて熱反応させ、生成物を液相から離脱させることによって生成物を得る液相反応物供給手段とを備えたものである。 Furthermore, falling-film catalyst reactor according to the present invention includes a planar catalyst layer, a liquid phase reaction in the thin film form is contacted with the catalyst by thermal reaction on the catalyst layer, the product is obtained by a liquid phase reactant supply means for obtaining the product by disengaging from the liquid phase.

【0012】 [0012]

【作用】本発明にかかる流下薄膜式触媒反応方法は、液相の反応物を薄い膜状にして触媒と接触させる反応方法を採ることで、触媒表面上で生成された物質は、反応液の薄い膜中を短時間で通過することが可能となり、触媒表面およびその周囲から生成物は速やかに離脱し、生成物の反応液中における残留時間が短く、反応速度の向上と効率的な熱利用を図ることができる。 Falling-film catalysis methods according to the present invention, by employing a reaction method and the reaction product in the liquid phase in thin film form is contacted with the catalyst, it was generated on the catalyst surface material of the reaction solution it is possible to pass through in a short time a thin film, the surface of the catalyst and products from the surrounding disengages quickly, shorter residence time in the reaction solution of the product, increase the reaction rate and efficient heat utilization it can be achieved.

【0013】また、触媒の面を傾けてその上を液相反応物を流下させるので、簡単に反応物を薄い膜状にすることができる。 Further, since the flow down the liquid phase reaction thereon by tilting the plane of the catalyst, it is possible to easily reactants thin film shape.

【0014】また、上記反応方法において、一般的に、 [0014] In the above reaction process, in general,
触媒の上で薄い膜状になって流れている液相反応物の組成がその流路に沿って変化するため、液相反応物の組成に対して、最適な反応を行い得る混合触媒あるいは単一触媒を少なくとも2種類以上、流路に沿って配置することで、より一層の反応速度の向上と効率的な熱利用を可能とする。 Since the composition of the liquid phase reactant flowing become thin membrane on the catalyst varies along the flow path, relative to the composition of the liquid phase reactant, the optimal reaction may perform mixed catalyst or a single one catalyst of at least two or more, by placing along the flow path, to enable more further improve the reaction rate and efficient heat utilization.

【0015】さらに、本発明にかかる流下薄膜式触媒反応装置は、液相の反応物を薄い膜状にして触媒と接触させるので、触媒表面上で生成された物質は、反応液の薄い膜中を短時間で通過し、生成物の反応液中における残留時間が短くなる。 Furthermore, such a falling film catalyst reactor in the present invention, since by the reaction in the liquid phase in thin film form is contacted with the catalyst, were generated on the catalyst surface material, a thin film of the reaction solution passes in a short time, residence time is shortened in the reaction solution of the product.

【0016】 [0016]

【実施例】図1は、本発明の流下薄膜式触媒反応装置の一実施例を示す断面略図である。 DETAILED DESCRIPTION FIG. 1 is a schematic sectional view showing an embodiment of a falling-film catalyst reactor of the present invention. 図において、10は反応槽で、WLは触媒層であり、図示のように適宜な角度で傾けられている。 In the figure, reference numeral 10 denotes a reaction vessel, WL is the catalyst layer are inclined at an appropriate angle as shown. Vは蒸気、Lは流路に流れを形成している薄膜状の反応液であり、反応に必要な供給熱Q V steam, L is a thin film of the reaction solution to form a flow in the flow path, the heat supplied Q required for the reaction
は、触媒層WLの下方より均等又は局部的に供給される。 Is equivalent or locally supplied from below of the catalyst layer WL. その他の構成は図4に示すものと同じである。 Other configurations are the same as those shown in FIG.

【0017】次に、動作について説明する。 [0017] Next, a description will be given of the operation. 反応液Lと触媒層WLの界面で生じた生成物は、反応液Lが非常に薄いため、速やかに液膜中を通過し気相へ矢印vで示すように離脱する。 Product formed at the interface of the reaction liquid L and the catalyst layer WL, since the reaction liquid L is very thin, leaving promptly pass through the liquid film as indicated by the arrow v to the gas phase. 従って、生成物が液相に残留する時間を短くすることがで、触媒表面上あるいは触媒の周囲で生成物の濃度を小さく保つことができるため、反応速度の向上と効率的な熱利用を図ることができる。 Therefore, out the product to reduce the time remaining in the liquid phase, it is possible to keep small concentration of the product around the catalyst surface or on the catalyst, to improve the efficient heat utilization in the reaction rate be able to.

【0018】触媒層WLは、反応液Lとの接触面積を大きくするため、多孔性のものが好ましい。 [0018] The catalyst layer WL in order to increase the contact area with the reaction liquid L, are porous are preferred. また、反応に必要な熱を効率よく利用するために、材質は伝熱性の良いものが好ましい。 Further, in order to efficiently utilize the heat needed for the reaction, the material is preferably of good heat conductivity.

【0019】図2は、反応系として、反応物が2−プロパノール、生成物がアセトンと水素の場合において、供給熱Qに対する反応に利用される熱の割合(熱利用率α)を、図4に示される従来の方式の場合と、図4の反応槽1を図1の反応槽10に置き換えた本発明の場合を、反応液Lのアセトン濃度(X)に対してプロットしたものである。 [0019] Figure 2 is a reaction system, the reaction product is 2-propanol, in the case the product of acetone and hydrogen, the ratio of the heat utilized in response to the heat supplied Q (heat utilization alpha), Figure 4 in the case of the conventional scheme shown in the case of the present invention by replacing the reaction vessel 10 of Figure 1 a reaction vessel 1 in FIG. 4, it is plotted against the acetone concentration of the reaction solution L (X). Iの曲線が従来のもの、IIの曲線が本発明によるものである。 Those curve of I is conventional, the curve of II is due to the present invention. なお、この場合には、供給熱Qは反応物に対し均等に加えた。 In this case, the heat supplied Q is added evenly to the reactants.

【0020】反応液L中のアセトン濃度が0.25のときは、どちらも熱利用率αは0.5となるが、これ以下の濃度では、本発明による方法の方が大きな熱利用率が得られ、有効であることが分かる。 The [0020] When the reaction liquid acetone concentration 0.25 in L, but both the thermal utilization factor α is 0.5, in which the following concentrations, towards the method according to the present invention is greater thermal utilization resulting proves to be effective.

【0021】図1に示した反応装置の構成は、反応液L The structure of the reaction apparatus shown in FIG. 1, the reaction liquid L
の組成がほぼ一定の場合に適した場合であるが、薄い膜状となって流れている反応液Lの組成はその流路に沿って変化する場合もある。 Although the composition of the case is suitable when substantially constant, the composition of the reaction liquid L is flowing a thin film shape it is also vary along the flow path. 例えば、図4における蒸留塔2 For example, the distillation column 2 in FIG. 4
の機能を反応槽10に持たせた場合であり、この場合、 A case where the functions imparted to the reaction vessel 10, in this case,
図3のような構成をとることができる。 It can be configured as in FIG. この図のW1〜 W1~ of FIG.
W4は、各位置における流路に沿って変化する反応液L W4, the reaction liquid L that varies along the flow path at each position
の組成に対し、最適な反応速度を与える触媒層である。 To composition of a catalyst layer which gives the optimum reaction rate.
図には4種の触媒層の場合を示してあるが、これは、2 It is shown in the case of four catalyst layers in the figure, which is 2
種以上であればよい。 It may be any species or more.

【0022】反応系として、反応物が2−プロパノール、生成物がアセトンと水素の場合を考えると、触媒層W1の位置における反応液Lは凝縮器より戻ってくるアセトン濃度の高い液となる。 [0022] As the reaction system, the reaction product is 2-propanol, the product Consider the case of acetone and hydrogen, the reaction liquid L at the position of the catalyst layer W1 becomes high acetone concentrations returning from the condenser liquid. 一方、反応液Lが流下していくうちに、蒸発しやすいアセトンは気相へ抜けていくために、触媒層W4の位置における反応液Lはアセトン濃度の低い液となる。 On the other hand, while the reaction liquid L is gradually flows down, in order evaporable acetone which escapes into the gas phase, the reaction liquid L at the position of the catalyst layer W4 becomes low acetone concentration liquid. 従って、触媒層W1はアセトン濃度が高い所で大きな反応速度を持つ触媒を、触媒層W4 Thus, a catalyst catalyst layer W1 is having a large reaction rate at higher acetone concentration, the catalyst layer W4
にはアセトン濃度が低いところで大きな反応速度を持つ触媒を配置し、これらの中間域では、W1とW4の中間的な触媒を配置する。 The placing of the catalyst having a large reaction rate at low acetone concentration, these intermediate region, placing the intermediate catalyst W1 and W4. このように、反応液Lの組成に対し最も適する触媒を配置することで、従来の触媒を懸濁させて反応を行う方式では不可能な蒸留機能を持った反応槽の構成も可能となり、より有効な熱利用を図ることができる。 Thus, by arranging the most suitable catalyst to the composition of the reaction liquid L, also allows configuration of the reaction vessel with a non distillation function in a manner that the reaction is carried out by suspending the conventional catalysts, and more it is possible to effectively heat utilization.

【0023】なお、加熱用の供給熱Qとしては各触媒と反応液の組成変化との関係において位置毎に最適な温度条件を設定すれば、さらに有効な熱利用を図ることもできる。 [0023] As the heat supplied Q for heating by setting the optimum temperature conditions for each position in relation to the composition change of the reaction liquid and each catalyst, it is also possible to more effective heat utilization.

【0024】 [0024]

【発明の効果】本発明にかかる流下薄膜式触媒反応方法は、液相の反応物を薄い膜状にして触媒と接触させて熱反応させ、生成物を液相から離脱させることによって生成物を得るので、触媒表面上で生成された物質は反応液の薄い膜中を短時間で通過するため、反応速度を向上でき効率的な熱利用が図れる。 According to the present invention falling film catalysis methods according to the present invention is, in contact with the catalyst by thermal reaction with the reactants in the liquid phase in thin film form, the product by disengaging the product from the liquid phase so obtained, are generated on the catalyst surface material to pass in a short time in a thin reaction layer, thereby efficient heat utilization can increase the reaction rate.

【0025】また、触媒面を傾けてその面上を液相反応物の流路とするので、操作が容易である。 Further, since the flow path of the liquid phase reactant on the surface by tilting the catalyst surface, it is easy to operate.

【0026】さらに、触媒は流路に沿って2種類以上としたので、液相反応物の組成に対して最適な反応をさせることができる。 Furthermore, the catalyst since the two kinds or more along the flow path, can be an optimum response to the composition of the liquid phase reaction product.

【0027】また、混合触媒あるいは単一触媒を少なくとも2種類以上流路に沿って配置するので、より最適な反応をさせることができる。 Further, since the mixed catalyst or a single catalyst arranged along at least two or more flow paths, can be a more optimal reaction.

【0028】さらに、本発明にかかる流下薄膜式触媒反応装置は、面状の触媒層と、この触媒層上に液相反応物を薄い膜状にして触媒と接触させて熱反応させ、生成物を液相から離脱させることによって生成物を得る液相反応物供給手段とを備えたので、触媒表面上で生成された物質は反応液の薄い膜中を短時間で通過するので、反応速度を向上でき、効率的な熱利用を図ることができる。 Furthermore, falling-film catalyst reactor according to the present invention includes a planar catalyst layer, a liquid phase reaction in the thin film form is contacted with the catalyst by thermal reaction on the catalyst layer, the product because a liquid-phase reactant supply means for obtaining the product by disengaging from the liquid phase, since produced on the catalyst surface material is passed in a short time a thin film of the reaction solution, the reaction rate improvement can, it is possible to achieve an efficient heat utilization.

【0029】かように、従来の触媒を反応槽内に懸濁させる方法では、供給された熱が反応に有効に利用されていなかったが、本発明によれば、反応速度の向上と効率的な熱利用が可能となる。 [0029] song, the method of suspending the conventional catalyst in the reaction vessel, but the supplied heat is not effectively utilized for the reaction, according to the present invention, improved and efficient reaction rates heat utilization is possible such. また、蒸留機能を持つ反応槽の構成も可能となる利点を有する。 Also it has a configuration also becomes possible advantages of the reactor with a distillation function.

【図面の簡単な説明】 BRIEF DESCRIPTION OF THE DRAWINGS

【図1】本発明の流下薄膜式触媒反応装置の一実施例の構成を示す図である。 1 is a diagram showing the structure of an embodiment of a falling-film catalyst reactor of the present invention.

【図2】従来方式と本発明による方式の熱利用率の比較図を示す図である。 Figure 2 shows a comparison diagram of the thermal utilization of the method according to the conventional method and the present invention.

【図3】本発明を応用した実施例を示す図である。 3 is a diagram showing an example of applying the present invention.

【図4】従来方式の触媒懸濁方式の反応槽と蒸留装置の構成を示す図である。 4 is a diagram showing a configuration of a reaction vessel and distillation apparatus of the catalyst suspension method of the conventional method.

【符号の説明】 DESCRIPTION OF SYMBOLS

WL 触媒層 L 反応液 V 蒸気 Q 供給熱 10 反応槽 WL catalyst layer L reaction V vapor Q supplied heat 10 reaction vessel

───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤井 孝博 茨城県つくば市梅園1丁目1番4 電子 技術総合研究所内 (56)参考文献 特開 平6−106045(JP,A) ────────────────────────────────────────────────── ─── of the front page continued (72) inventor Takahiro Fujii Tsukuba, Ibaraki Prefecture Meiyuan 1 chome 4 e-Science and technology in the Laboratory (56) reference Patent flat 6-106045 (JP, a)

Claims (5)

    (57)【特許請求の範囲】 (57) [the claims]
  1. 【請求項1】 触媒と熱を利用して液相の反応物から、 From 1. A reaction product of using a catalyst and heat the liquid phase,
    凝縮性ガスの生成物または不凝縮性ガスの生成物あるいはその両方を得る反応方法であって、液相の反応物を薄い膜状にして触媒と接触させて熱反応させ、生成物を液相から離脱させることによって生成物を得ることを特徴とする流下薄膜式触媒反応方法。 Product products or incondensable gas condensable gas or a reaction method for obtaining both, in contact with the catalyst by thermal reaction with the reactants in the liquid phase in thin film form, the product liquid phase falling-film catalysis wherein the obtaining the product by disengaging from.
  2. 【請求項2】 液相反応物を傾けられた触媒の面における流路となすことによって薄膜状にしたことを特徴とする請求項1記載の流下薄膜式触媒反応方法。 2. A falling film catalysis method according to claim 1, characterized in that a thin film by forming a channel in the plane of the liquid phase reaction was tilted catalyst.
  3. 【請求項3】 触媒を液相反応物の組成に対応させて流路に沿って2種類以上配置したことを特徴とする請求項2記載の流下薄膜式触媒反応方法。 3. A falling film catalysis method of claim 2, wherein the catalyst was corresponding to the composition of the liquid phase reaction is characterized by being arranged two or more along with the flow path.
  4. 【請求項4】 触媒を単一触媒あるいは混合触媒にしたことを特徴とする請求項1乃至請求項3のいずれかに記載の流下薄膜式触媒反応方法。 4. A falling film catalysis method according to any one of claims 1 to 3, characterized in that the catalyst in a single catalyst or catalyst mixture.
  5. 【請求項5】 触媒と熱を利用して液相の反応物から、 From wherein reactant using a catalyst and heat the liquid phase,
    凝縮性ガスの生成物または不凝縮性ガスの生成物あるいはその両方を得る反応装置であって、面状の触媒層と、 Product products or incondensable gas condensable gas or a reactor to obtain both a surface of the catalyst layer,
    この触媒層上に液相反応物を薄い膜状にして触媒と接触させて熱反応させ、生成物を液相から離脱させることによって生成物を得る液相反応物供給手段とを備えたことを特徴とする流下薄膜式触媒反応装置。 The catalyst layer on the liquid phase reaction in the thin film form is contacted with the catalyst by thermal reaction, that the product was a liquid-phase reactant supply means for obtaining the product by disengaging from the liquid phase falling-film catalyst reactor according to claim.
JP11235194A 1994-05-26 1994-05-26 Falling-film catalysis method and apparatus Expired - Lifetime JP2615424B2 (en)

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US6906164B2 (en) 2000-12-07 2005-06-14 Eastman Chemical Company Polyester process using a pipe reactor
US7943094B2 (en) 2006-12-07 2011-05-17 Grupo Petrotemex, S.A. De C.V. Polyester production system employing horizontally elongated esterification vessel
US7649109B2 (en) 2006-12-07 2010-01-19 Eastman Chemical Company Polyester production system employing recirculation of hot alcohol to esterification zone
US7892498B2 (en) 2007-03-08 2011-02-22 Eastman Chemical Company Polyester production system employing an unagitated esterification reactor
US7868129B2 (en) 2007-07-12 2011-01-11 Eastman Chemical Company Sloped tubular reactor with spaced sequential trays

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