JPH0665379B2 - Isothermal multi-tube reactor for ethylene production - Google Patents
Isothermal multi-tube reactor for ethylene productionInfo
- Publication number
- JPH0665379B2 JPH0665379B2 JP63058204A JP5820488A JPH0665379B2 JP H0665379 B2 JPH0665379 B2 JP H0665379B2 JP 63058204 A JP63058204 A JP 63058204A JP 5820488 A JP5820488 A JP 5820488A JP H0665379 B2 JPH0665379 B2 JP H0665379B2
- Authority
- JP
- Japan
- Prior art keywords
- reaction
- isothermal
- catalyst
- reactor
- line mixer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 title claims description 7
- 239000005977 Ethylene Substances 0.000 title claims description 7
- 238000004519 manufacturing process Methods 0.000 title description 2
- 238000006243 chemical reaction Methods 0.000 claims description 38
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 26
- 239000003054 catalyst Substances 0.000 claims description 22
- 238000006297 dehydration reaction Methods 0.000 description 5
- 230000007423 decrease Effects 0.000 description 4
- 239000010935 stainless steel Substances 0.000 description 4
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 230000000052 comparative effect Effects 0.000 description 3
- 239000012530 fluid Substances 0.000 description 3
- 230000004913 activation Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J8/00—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes
- B01J8/02—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds
- B01J8/06—Chemical or physical processes in general, conducted in the presence of fluids and solid particles; Apparatus for such processes with stationary particles, e.g. in fixed beds in tube reactors; the solid particles being arranged in tubes
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Description
【発明の詳細な説明】 イ．発明の目的 産業上の利用分野 本発明は、エタノールを脱水してエチレンを製造するた
めの等温型多管式反応器に関するものである。Detailed Description of the Invention a. TECHNICAL FIELD The present invention relates to an isothermal multitubular reactor for dehydrating ethanol to produce ethylene.
従来の技術 エタノールをアルミナ等の脱水触媒に接触させ脱水して
エチレンとする反応は工業的に広く利用されているが、
この反応は吸熱反応であるため、通常第３図に示すよう
な等温型多管式反応器を用い、外部から熱を供給しなが
ら反応させている。Conventional technology The reaction of dehydrating ethylene by contacting ethanol with a dehydration catalyst such as alumina is widely used industrially.
Since this reaction is an endothermic reaction, an isothermal multitubular reactor as shown in FIG. 3 is usually used and the reaction is performed while supplying heat from the outside.
しかしそのようにしても、エタノールの脱水反応は吸熱
反応である上に活性化エネルギーが大きいので、反応の
進行に伴って触媒層温度が降下し反応速度が大幅に低下
する。However, even in such a case, the dehydration reaction of ethanol is an endothermic reaction and also has a large activation energy, so that the temperature of the catalyst layer is lowered and the reaction rate is significantly reduced as the reaction progresses.
そのために、必要な触媒量が多くなり、それに伴なって
触媒を充填した反応管の本数を多く、反応器の径を大き
くせざるを得なかった。Therefore, the required amount of catalyst is increased, and accordingly, the number of reaction tubes filled with the catalyst is increased, and the diameter of the reactor has to be increased.
発明が解決しようとする問題点 本発明は、反応管に充填した触媒層での温度降下を抑制
することによって、反応速度の低下を抑制し、必要触媒
量の低減、反応管本数の低減、反応器サイズの縮小を行
うことができるエチレン製造用等温型多管式反応器を提
供するものである。DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention The present invention suppresses a decrease in reaction rate by suppressing a temperature drop in a catalyst layer filled in a reaction tube, reduces the amount of required catalyst, reduces the number of reaction tubes, It is intended to provide an isothermal multitubular reactor for producing ethylene, which can reduce the size of the vessel.
ロ．発明の構成 問題点を解決するための手段 本発明の、エタノールを脱水してエチレンを製造するた
めの等温型多管式反応器は、触媒を充填した反応管にラ
インミキサーが内装されていることを特徴とする。B. Structure of the Invention Means for Solving Problems The isothermal multitubular reactor for dehydrating ethanol to produce ethylene according to the present invention has a line mixer incorporated in a reaction tube filled with a catalyst. Is characterized by.
第１図は、本発明の等温型多管式反応器における個々の
反応管の断面を示す図である。FIG. 1 is a view showing a cross section of each reaction tube in the isothermal multitubular reactor of the present invention.
反応管１にはラインミキサー２が内装され、さらに触媒
３が充填されている。The reaction tube 1 is internally equipped with a line mixer 2 and further filled with a catalyst 3.
ラインミキサー２は複数個のひねり羽根を連結した構造
で、特に第2A図に示すような方向にひねられたひねり羽
根2Aと第2B図に示すような逆方向にひねられたひねり羽
根2Bとが交互に連結されているものであることが好まし
い。The line mixer 2 has a structure in which a plurality of twist blades are connected, and in particular, a twist blade 2A twisted in the direction shown in FIG. 2A and a twist blade 2B twisted in the opposite direction shown in FIG. 2B are provided. It is preferable that they are alternately connected.
さらに、第１図におけるひねり羽根Ａ及びＢの配列に示
されるように、隣接するひねり羽根の連結面が90度ずれ
るように連結されているものであることが好ましい。Further, as shown in the arrangement of the twist blades A and B in FIG. 1, it is preferable that the connection surfaces of the adjacent twist blades are connected so as to be displaced by 90 degrees.
ひねり羽根Ａ及びＢは、反応管の内径に対して両サイド
のクリアランスが1mm以下となる巾で高さが50〜100mm、
厚さが１〜2mmの平板を左向き及び右向きに90度乃至180
度ひねったものを触媒層の長さに相当するだけ作製して
連結する。The twist blades A and B have a width such that the clearance on both sides is 1 mm or less with respect to the inner diameter of the reaction tube, and the height is 50 to 100 mm,
Flat plate with a thickness of 1 to 2 mm 90 ° to 180 ° to the left and right
The twisted pieces are produced and connected in an amount corresponding to the length of the catalyst layer.
ひねり羽根の材質は、アルミニウム、カーボンスチー
ル、ステンレスのいずれでも良い。The material of the twisting blade may be aluminum, carbon steel or stainless steel.
本発明の等温型多管式反応器ほ、第３図に断面図として
示すように、第１図により説明したような、ラインミキ
サーが内装され触媒が充填された反応管１を多数備えた
もである。The isothermal multitubular reactor according to the present invention also includes a large number of reaction tubes 1 in which a line mixer is installed and which is filled with a catalyst, as shown in FIG. 3, as a sectional view. Is.
第３図において、記号４は原料入口、記号５は反応生成
物出口、記号６は加熱媒体入口、記号７は加熱媒体出口
である。In FIG. 3, symbol 4 is a raw material inlet, symbol 5 is a reaction product outlet, symbol 6 is a heating medium inlet, and symbol 7 is a heating medium outlet.
本発明の反応器は、ひねり羽根を連結したものを各反応
管に内装した後、必要量の触媒を充填すればよい。In the reactor of the present invention, a reactor in which twist blades are connected may be installed in each reaction tube, and then a required amount of catalyst may be filled.
作用 既述の如く、エタノールの脱水反応は吸熱反応である上
に、活性化エネルギーが大きいので反応の進行に伴って
触媒層温度が降下し反応速度が大幅に低下する。Action As described above, the dehydration reaction of ethanol is an endothermic reaction, and since the activation energy is large, the temperature of the catalyst layer drops as the reaction progresses, and the reaction rate decreases significantly.
触媒を充填した反応管に内装されたラインミキサーは、
触媒層内での流体の流れ方向及び混合を強制し、径方向
の伝熱速度を大きくすることにより、この反応速度低下
の要因である温度降下を抑制する。The line mixer installed in the reaction tube filled with the catalyst
By forcing the flow direction and mixing of the fluid in the catalyst layer and increasing the heat transfer rate in the radial direction, the temperature drop, which is the cause of this reaction rate decrease, is suppressed.
ひねりの向きを交互に逆にしたり連結面を90度ずらした
理由は、撹拌混合効果を上げ、反応管の璧側のより高温
の流体が、常により低温である中心部に流れ込むように
して径方向の伝熱を良くするためである。The reason why the twist directions were alternately reversed and the connecting surfaces were shifted by 90 degrees was that the stirring and mixing effect was enhanced so that the hotter fluid on the wall side of the reaction tube would always flow into the center, which is at a lower temperature. This is to improve heat transfer in the direction.
ひねり羽根と反応管内璧とのクリアランスを1mm以下に
したのは、反応管内壁との間の空隙を小さくして、流体
の吹き抜けを抑制するためである。The clearance between the twisting blade and the inner wall of the reaction tube was set to 1 mm or less in order to reduce the gap between the inner wall of the reaction tube and the inner wall of the reaction tube to suppress the blow-through of fluid.
実施例１ 幅38mm×長さ50mm×厚さ1.0mmのステンレス製板16枚を
作り、内８枚を左向き、残り８枚を右向きに各々90度ひ
ねり、そのひねりの向きが交互に逆になり且つ連結面が
90度づれるようにして連結したラインミキサーを、内径
40mm、長さ1.5mのステンレス製反応管に装着した後、Al
2O31Kgを充填して、工業用エタノール0.48kg／hrを送
り、温度330℃、圧力2.0kg／cm2Gに保ち脱水反応を行わ
せた。Example 1 16 stainless steel plates having a width of 38 mm, a length of 50 mm and a thickness of 1.0 mm were made, 8 of them were turned to the left and the remaining 8 were turned to the right by 90 degrees, and the twist directions were alternately reversed. And the connecting surface
The inner diameter of the line mixer connected so that
After mounting on a 40 mm, 1.5 m long stainless steel reaction tube,
Filling the 2 O 3 1Kg, feed industrial ethanol 0.48 kg / hr, a temperature 330 ° C., was carried out a dehydration reaction maintained at a pressure 2.0kg / cm 2 G.
この時のエタノール転化率、見掛けの速度定数ｋ′及び
触媒層平均温度を第１表に示した。Table 1 shows the ethanol conversion rate, the apparent rate constant k ', and the average catalyst layer temperature at this time.
比較例１ Al2O31Kgを充填した内径40mm、長さ1.5mのステンレス製
反応管に工業用エタノール0.48kg／hrを送り、温度330
℃、圧力2.0kg／cm2Gに保ち脱水反応を行わせた。 Comparative Example 1 0.48 kg / hr of industrial ethanol was sent to a stainless steel reaction tube having an inner diameter of 40 mm and a length of 1.5 m filled with 1 kg of Al 2 O 3 and a temperature of 330
The dehydration reaction was performed while maintaining the temperature at 2.0 ° C. and the pressure at 2.0 kg / cm 2 G.
この時のエタノール転化率、見掛けの速度定数ｋ′及び
触媒層平均温度を第１表に示した。Table 1 shows the ethanol conversion rate, the apparent rate constant k ', and the average catalyst layer temperature at this time.
触媒層にラインミキサーを内装した実施例１では、触媒
層平均温度が高く、エタノール転化率、見掛けの速度定
数ｋ′ともに比較例の場合より高くなっている。In Example 1 in which the catalyst layer was equipped with a line mixer, the average temperature of the catalyst layer was high, and both the ethanol conversion rate and the apparent rate constant k ′ were higher than in the comparative example.
第１表に示した実施例１及び比較例１の結果を基にし
て、同じ原料供給量で同じエタノール転化率を得られる
触媒量、管の本数及び反応器径を第２表に示した。Based on the results of Example 1 and Comparative Example 1 shown in Table 1, Table 2 shows the amount of catalyst, the number of tubes and the reactor diameter that can obtain the same ethanol conversion rate with the same raw material supply amount.
ハ．発明の効果 エタノールの脱水によりエチレンを製造する等温型多管
式反応器において、反応熱に触媒層温度の降下を抑制
し、反応速度の低下を抑制することで、必要触媒量を減
らすことができ、それに伴って反応管の本数が減り反応
器サイズを小さくできるために反応器の製造コストを低
減できる。 C. Effect of the Invention In an isothermal multi-tubular reactor that produces ethylene by dehydrating ethanol, by suppressing the catalyst layer temperature drop due to reaction heat and suppressing the reaction rate decrease, the required catalyst amount can be reduced. As a result, the number of reaction tubes is reduced and the reactor size can be reduced, so that the manufacturing cost of the reactor can be reduced.
第１図は、本発明の等温型多管式反応器における個々の
反応管の断面を示す図、第2A図及び第2B図はラインミキ
サーを構成するひねり羽根の例を示す図、第３図は等温
型多管式反応器の断面図である。FIG. 1 is a view showing a cross section of an individual reaction tube in an isothermal multitubular reactor of the present invention, FIGS. 2A and 2B are views showing an example of a twisting blade constituting a line mixer, and FIG. FIG. 4 is a cross-sectional view of an isothermal multitubular reactor.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特公 昭59−40057（ＪＰ，Ｂ２) 特公 昭61−21603（ＪＰ，Ｂ２) ▲穐▼原新吾監修「静止型混合器−基礎 と応用−」（昭56−９−30）日刊工業新聞 社発行 Ｐ．１〜16 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Japanese Patent Publication Sho 59-40057 (JP, B2) Japanese Patent Publication 61-21603 (JP, B2) (Sho 56-9-30) Published by Nikkan Kogyo Shimbun P. 1-16
Claims (3)
内装されていることを特徴とするエタノールを脱水して
エチレンを製造するための等温型多管式反応器。1. An isothermal multi-tubular reactor for producing ethylene by dehydrating ethanol, characterized in that a reaction mixer filled with a catalyst is internally equipped with a line mixer.
結した構造で、且つ逆方向にひねられたひねり羽根が交
互に連結されている特許請求の範囲第１項記載の等温型
多管式反応器。2. The isothermal multitubular reaction according to claim 1, wherein the line mixer has a structure in which a plurality of twisting blades are connected, and twisting blades twisted in opposite directions are alternately connected. vessel.
ように連結されている特許請求の範囲第１項記載の等温
型多管式反応器。3. The isothermal multitubular reactor according to claim 1, wherein the connecting surfaces of the adjacent twisting blades are connected so as to be displaced by 90 degrees.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63058204A JPH0665379B2 (en) | 1988-03-14 | 1988-03-14 | Isothermal multi-tube reactor for ethylene production |
| IN93/CAL/89A IN171095B (en) | 1987-12-21 | 1989-01-30 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63058204A JPH0665379B2 (en) | 1988-03-14 | 1988-03-14 | Isothermal multi-tube reactor for ethylene production |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01231932A JPH01231932A (en) | 1989-09-18 |
| JPH0665379B2 true JPH0665379B2 (en) | 1994-08-24 |
Family
ID=13077505
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63058204A Expired - Lifetime JPH0665379B2 (en) | 1987-12-21 | 1988-03-14 | Isothermal multi-tube reactor for ethylene production |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0665379B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2845528B2 (en) * | 1989-12-15 | 1999-01-13 | 三井化学株式会社 | Propylene production method |
| CN103242122A (en) * | 2012-02-09 | 2013-08-14 | 中国石油化工股份有限公司 | Combined technique and device for preparing ethylene from ethanol and synthesizing dimethyl ether from methanol |
| CN115414872B (en) * | 2022-08-11 | 2023-11-03 | 安徽润衍科技有限公司 | Tubular isothermal reactor and method for producing 1,2-pentanediol from 1, 2-epoxypentane |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5940057A (en) * | 1982-08-31 | 1984-03-05 | Komatsu Ltd | Closed-circuit hydraulic apparatus |
| JPS6120603A (en) * | 1984-07-10 | 1986-01-29 | Nippon Steel Corp | Strip rolling mill |
-
1988
- 1988-03-14 JP JP63058204A patent/JPH0665379B2/en not_active Expired - Lifetime
Non-Patent Citations (1)
| Title |
|---|
| ▲穐▼原新吾監修「静止型混合器−基礎と応用−」（昭５６−９−３０）日刊工業新聞社発行Ｐ．１〜１６ |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01231932A (en) | 1989-09-18 |
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