JP2010501496A - 低級オレフィンを製造するための流動化触媒反応装置の始動方法 - Google Patents
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Abstract
【選択図】図1
Description
上記2種の低級オレフィンを製造する主な方法は軽油のクラッキングであり、他の方法として低級アルコールエーテル、アルデヒド、チオール、ハロゲン化炭化水素の触媒転化なども挙げられる。20世紀70年代における2回に亘る石油危機のショックによって、非石油原料コースで低級オレフィンを取る技術の研究開発が促進されており、その中でメタノールの転化方法が大きく発展されて、大きな商業応用の見通しを示している。
メタノール又は/及びジメチルエーテルの低級オレフィンへの転化は強放熱過程であり、メタノール又は/及びジメチルエーテルから低級オレフィンを製造する流動化過程はまだ工業上実施した前例がない。特に、SAPO−34分子篩触媒はまだ実際的な工業運転上の試練を経たず、FCC過程を利用する油ふき昇温方法も実施できるかどうかがまだ未知数である。
したがって、如何に転化反応の特徴に基づいて適宜な始動方法を用いるかは、このような過程の工業実施に際して直面する挑戦である。
1)始動補助熱源を利用して触媒ベッドを200℃に加熱した時点で、反応器に原料を輸送し、原料の反応による放熱を利用して反応器の温度を規定温度に急速に上昇させ、かつ触媒をコーキングする工程、及び、
2)反応器中のコーキングした触媒を再生器の再生ベッドに循環させた後燃焼して熱を放出させて、再生器の温度を540℃以上に急速に上昇させ、体系を迅速に正常運転状態に到達させる工程。
1)始動補助熱源を利用して触媒ベッドを300℃に加熱した時点で、反応器に原料を輸送し、原料の反応による放熱を利用して反応器の温度を規定温度に急速に上昇させ、かつ触媒をコーキングする工程、及び、
2)反応器中のコーキングした触媒を再生器の再生ベッドに循環させた後燃焼して熱を放出させて、再生器の温度を540℃以上に急速に上昇させ、体系を迅速に正常運転状態に到達させる工程。
2CH3OH → CH3OCH3 + H2O −23.4kJ/mol
水素型分子篩は固体酸触媒であり、その作用下での反応メカニズムは以下のとおりである。
CH3OH + H+B- → CH3OH2 + + B- → CH3B + H2O
CH3B + CH3OH → CH3BCH3OH → CH3OCH3 + H+B-
式中、B-は分子篩母体を示す。
反応器温度が300℃以上に達してからは、前記のメタノールのジメチルエーテルへの転化反応ばかりでなく、ジメチルエーテルがオレフィン((CH2)2n)へ転化する放熱反応も発生する。
nCH3OCH3 → (CH2)2n + nH2O −11〜53kJ/mol
(1)反応装置は、反応器及び再生器からなる循環流動化触媒反応装置であること、
(2)触媒は、水素型分子篩触媒又はその他の固体酸触媒であること、
(3)反応器の触媒ベッドの温度が200℃以上に達したら、メタノール原料を輸送して、反応を開始することができ、反応によって産生された熱量を利用して、反応器を規定温度に速く昇温させるとともに、再生器の昇温を速める。ジメチルエーテルを原料とする場合、反応装置を300℃以上に加熱してはじめて、原料を供給すること、
(4)メタノール転化反応は触媒をコーキングさせ、コーキングした触媒は体系の循環に伴って再生器に入った後、再生器の触媒ベッドの温度が340℃に達した時点で燃焼し始めて、再生器の温度を規定温度に速く上げること、
(5)本発明による方法は、伝統的循環流動化触媒反応装置において始動階段で必ず採る、再生器の触媒ベッドにライトディセルオイルを噴いて燃焼させることにより再生器を昇温させる手段を免れることができ、これにより、始動に必要な時間を短縮するとともに、触媒を保護し、関連資源の消耗を節約できるばかりでなく、経済的効果及び利益も向上させることができる。
図1はこの実施例における反応−再生部分のプロセスフロー模式図である。101は窒素ガス又はスチームを予熱するための加熱器であり、102は反応器であり、103は再生器であり、104は空気を予熱するための補助加熱器であり、105は窒素ガスの入り口管線であり、106はスチームの入り口管線であり、107は窒素ガス又はスチームが反応器に入る管線であり、108はメタノール供給管線であり、109は生成物ガスが冷却体系に流れ込む管線であり、110は再生された触媒を再生器から反応器に循環させる輸送管線であり、111は反応によってコーキングした触媒を反応器から再生器に循環させる輸送管線であり、112は再生フルーガス排出管線であり、113は触媒タンクから再生器への触媒の輸送管線であり、114は補助加熱器から再生器への空気の輸送管線であり、115は触媒を再生器から触媒タンクに戻らせる輸送管線であり、116は空気の入り口管線である。
Claims (5)
- 低級オレフィンを製造するための流動化触媒反応装置の始動方法であって、メタノール及びメタノールとジメチルエーテルとの混合物を原料とし、始動補助熱源を利用して循環流動化触媒反応装置の触媒ベッドを200℃に加熱した時点で、上記原料を反応器へ輸送し、原料の反応による放熱を利用して反応器の温度を急速に規定温度まで上昇させ、反応器中のコーキングした触媒を再生器へ循環させた後燃焼して熱を放出させ、再生器の温度を急速に540℃以上に上昇させることにより、体系を迅速に正常運転状態に到達させることを特徴とする、低級オレフィンを製造するための流動化触媒反応装置の始動方法。
- 低級オレフィンを製造するための流動化触媒反応装置の始動方法であって、ジメチルエーテルを原料とし、始動補助熱源を利用して循環流動化触媒反応装置の触媒ベッドを300℃に加熱した時点で上記原料を反応器へ輸送し、原料の反応による放熱を利用して反応器の温度を急速に規定温度まで上昇させ、反応器中のコーキングした触媒を再生器へ循環させた後燃焼して熱を放出させて、再生器の温度を迅速に540℃以上に上昇させることにより、体系を迅速に正常運転状態に到達させることを特徴とする、低級オレフィンを製造するための流動化触媒反応装置の始動方法。
- 反応装置が、反応器及び再生器からなる循環流動化触媒反応装置であることを特徴とする、請求項1又は2に記載の方法。
- 反応器の触媒ベッド中の触媒が、水素型分子篩触媒であることを特徴とする、請求項1又は2に記載の方法。
- 反応器の触媒ベッド中の触媒が、固体酸触媒であることを特徴とする、請求項1又は2に記載の方法。
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PCT/CN2007/002549 WO2008025254A1 (en) | 2006-08-23 | 2007-08-23 | A process for starting up fluidized catalytic reaction means used for producing lower olefin |
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JPWO2018221706A1 (ja) * | 2017-05-31 | 2020-03-26 | 古河電気工業株式会社 | メタノール改質触媒構造体、メタノール改質用装置、メタノール改質触媒構造体の製造方法及びオレフィンまたは芳香族炭化水素の少なくとも一方の製造方法 |
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US11904306B2 (en) | 2017-05-31 | 2024-02-20 | Furukawa Electric Co., Ltd. | Catalyst structure and method for producing the catalyst structure |
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US12115523B2 (en) | 2017-05-31 | 2024-10-15 | National University Corporation Hokkaido University | Functional structural body and method for making functional structural body |
Also Published As
Publication number | Publication date |
---|---|
BRPI0712628B1 (pt) | 2018-02-06 |
EP2055690B1 (en) | 2017-07-19 |
ZA200900700B (en) | 2010-04-28 |
KR20090064391A (ko) | 2009-06-18 |
WO2008025254A1 (en) | 2008-03-06 |
JP5009370B2 (ja) | 2012-08-22 |
EP2055690A1 (en) | 2009-05-06 |
AU2007291793B2 (en) | 2010-11-25 |
CN101130466A (zh) | 2008-02-27 |
DK2055690T3 (en) | 2017-08-28 |
KR101092899B1 (ko) | 2011-12-12 |
MY154377A (en) | 2015-06-15 |
EP2055690A4 (en) | 2010-03-31 |
BRPI0712628A2 (pt) | 2012-10-23 |
AU2007291793A1 (en) | 2008-03-06 |
CN101130466B (zh) | 2011-05-04 |
US20100004118A1 (en) | 2010-01-07 |
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