JP5904995B2 - メタセシスおよび芳香族化による、ブテン類からのプロピレンおよび芳香族化合物の製造法 - Google Patents
メタセシスおよび芳香族化による、ブテン類からのプロピレンおよび芳香族化合物の製造法 Download PDFInfo
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- JP5904995B2 JP5904995B2 JP2013506234A JP2013506234A JP5904995B2 JP 5904995 B2 JP5904995 B2 JP 5904995B2 JP 2013506234 A JP2013506234 A JP 2013506234A JP 2013506234 A JP2013506234 A JP 2013506234A JP 5904995 B2 JP5904995 B2 JP 5904995B2
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- butene
- metathesis
- propylene
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- C07C2/76—Preparation of hydrocarbons from hydrocarbons containing a smaller number of carbon atoms by condensation of hydrocarbons with partial elimination of hydrogen
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- C07C5/32—Preparation of hydrocarbons from hydrocarbons containing the same number of carbon atoms by dehydrogenation with formation of free hydrogen
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Description
a)1−ブテン、2−ブテン、必要に応じてイソブテンを含む炭化水素原料混合物を、メタセシス触媒の存在下、エチレン、プロピレン、生成物ブテン類、ペンテン類、ヘキセン類、炭素数の更に高いオレフィン類を生成する条件において反応させる工程と、
b1)生成物から、ペンテン類、ブテン類、必要に応じてエチレンを分離し、リサイクルする工程と、
b2)生成物からプロピレンを分離する工程と、
b3)生成物から、ヘキセン類および炭素数の更に高いオレフィン類を分離する工程と、
c)ヘキセン類および炭素数の更に高いオレフィン類を、芳香族化触媒の存在下で反応させる工程と、
を含む、プロピレンおよび芳香族化合物の製造法に関する。
ブテン + 2−ブテン ←→ 2−ペンテン + プロピレン
2−ペンテン + 1−ブテン ←→ 3−ヘキセン + プロピレン
2−ペンテン + 2−ペンテン ←→ 3−ヘキセン + 2−ブテン
1−ブテン + 1−ブテン ←→ 3−ヘキセン + エチレン
1−ブテン + プロピレン ←→ 2−ペンテン + エチレン
2−ブテン + エチレン ←→ プロピレン + プロピレン
イソブテン + イソブテン ←→ エチレン + 2,3−ジメチル−2−ブテン
イソブテン + 1−ブテン ←→ エチレン + 2−メチル−2−ペンテン
イソブテン + 2−ブテン ←→ プロピレン + 2−メチル−2−ブテン
1−ペンテン + 1−ブテン ←→ 3−ヘプテン + エチレン
1−ペンテン + 2−ブテン ←→ 2−ヘキセン + プロピレン
1−ペンテン + 1−ペンテン ←→ 4−オクテン + エチレン
1−ペンテン + プロピレン ←→ 2−ヘキセン + エチレン
1−ペンテン + 2−ペンテン ←→ 3−ヘプテン + プロピレン
1−ペンテン + 2−ペンテン ←→ 2−ヘキセン + 1−ブテン
1−ブテン + 2−ブテン ←→ 2−ペンテン + プロピレン
2−ペンテン + 1−ブテン ←→ 3−ヘキセン + プロピレン
1−ブテン + 1−ブテン ←→ 3−ヘキセン + エチレン
2−ブテン + エチレン ←→ プロピレン + プロピレン
触媒:
1.米国特許第6,130,181号に記載の方法に基づいて合成した、γ−アルミナ上のRe2O7(10質量百分率(質量%)のRe金属)、
2.Strem Chemicalsより市販品として入手可能な、アルミナ上の、4質量%のCoO、14質量%のMoO3、
3.米国特許第4,609,769号に記載の方法に基づいて合成した、シリカ上の6質量%のWO3。
1:3のモル比で1−ブテン/2−ブテンを含む原料を、48℃に保ったアルミナ上のRe2O7(10質量%のRe金属)の触媒床に連続的に通した。触媒は、空気中500℃で予め活性化した。24時間稼働後の反応生成物の分析より、生成物が平衡分布の状態での総ブテン類転化率は43%であることが明らかとなった。プロピレンに対する選択性は49%であるが、ヘキセン類に対する選択性は4%であることが分かった。cis−3−ヘキセンとtrans−3−ヘキセンとのモル比は1:6であることが分かった。計算平衡生成物分布と実測値との比較を図2に示す。この結果から分かるように、この反応は平衡付近で進行する。
3:1のモル比で1−ブテン/2−ブテンを含む原料を、48℃に保ったアルミナ上のRe2O7(10質量%のRe金属)の触媒床に連続的に通した。触媒は、空気中500℃で予め活性化した。19時間稼働後の反応生成物の分析より、生成物が平衡分布の状態での総ブテン類転化率は59%であることが明らかとなった。プロピレンに対する選択性は46%であるが、ヘキセン類に対する選択性は20%であることが分かった。更に、cis−3−ヘキセンとtrans−3−ヘキセンとのモル比は1:6であることが分かった。計算平衡生成物分布と実測値との比較を図3に示す。
1:1のモル比で1−ブテン/2−ブテンを含む原料を、97℃に保ったアルミナ上のCoO/MoO3(3.5質量%のCoO、14質量%のMoO3)の触媒床に連続的に通した。触媒は、窒素中500℃で予め活性化した。9時間稼働後の反応生成物の分析より、生成物が平衡分布の状態での総ブテン類転化率は57%であることが明らかとなった。プロピレンに対する選択性は46%であるが、ヘキセン類に対する選択性は約10%であることが分かった。計算平衡生成物分布と実測値との比較を図4に示す。
3:1のモル比で1−ブテン/2−ブテンを含む原料を、296℃に保ったシリカ上のWO3(6質量%のWO3)の触媒床に連続的に通した。触媒は、窒素中600℃で予め活性化した。45分間稼働後の反応生成物の分析より、生成物が平衡分布の状態での総ブテン類転化率は42%であることが明らかとなった。プロピレンに対する選択性は48%であるが、ヘキセン類に対する選択性は5%であることが分かった。実験での生成物分布を図5に示す。
触媒:触媒は、米国特許出願公開第2008/0255398号に開示の方法で製造した、Pt/CsGeZSM−5であった。
14mol%のcis−3−ヘキセンと86mol%のtrans−3−ヘキセンとの混合物を、濃度を変えながらn−ヘキサンと混合し、反応器原料として使用した。cis:transの、この1:6のモル比は、この温度での計算平衡比、12%のcisと88%のtransに近い。メタセシス工程からの生成物は、他のC6原料と混合することがあるため、様々なヘキセン濃度を用いた。下記の試験条件を用いた。それぞれの化合物のGCデータは、大部分の3−ヘキセンがすぐにn−ヘキサンに水素化され、その一部が再び1−および2−ヘキセンに脱水素化されることを示している。この操作を1−ヘキセンについても繰り返した。その結果を下記の表1に示す。表1において、触媒は、1質量%のPt/CsGeZSM−5触媒である。転化率および芳香族化合物選択性は、T=515℃、P=1atm、原料中のH2/HC=0.75、LHSV=8.6hr−1で測定した。
Claims (12)
- プロピレンおよび芳香族化合物の製造法であって、
前記製造法は、
a)1−ブテン、2−ブテン、必要に応じてイソブテンを含む炭化水素原料混合物を、メタセシス触媒の存在下、エチレン、プロピレン、生成物ブテン類、ペンテン類、ヘキセン類、炭素数の更に高いオレフィン類を含む生成物が生成する条件において反応させる工程と、
b1)前記生成物から、ペンテン類、ブテン類、必要に応じてエチレンを分離し、リサイクルする工程と、
b2)前記生成物からプロピレンを分離する工程と、
b3)前記生成物からヘキセン類および炭素数の更に高いオレフィン類を分離する工程と、
c)前記ヘキセン類および炭素数の更に高いオレフィン類を、芳香族化触媒の存在下で反応させる工程と、
を含み、
前記芳香族化触媒は、Pt/CsGeZSM−5、Pt/KGeZSM−5、またはPt/KZSM−5であり、
前記工程a)において、前記炭化水素原料中の1−ブテン:2−ブテンのモル比は、1:6から6:1であることを特徴とする、プロピレンおよび芳香族化合物の製造法。 - 前記メタセシス触媒は、SiO2上のWO3、Al2O3上のMoO3、またはAl2O3上のRe2O7であることを特徴とする、請求項1に記載の製造法。
- 前記芳香族化触媒は、Pt/CsGeZSM−5であることを特徴とする、請求項1または請求項2のいずれか1項に記載の製造法。
- 前記ヘキセン類および炭素数の更に高いオレフィン類の濃度は、30%までであることを特徴とする、請求項1から請求項3のいずれか1項に記載の製造法。
- 前記炭化水素原料中の1−ブテン:2−ブテンのモル比は、1.5:1から2.5:1であることを特徴とする、請求項1から請求項4のいずれか1項に記載の製造法。
- 前記炭化水素原料は、100ppm未満の濃度の、非ジエン不純物、汚染物質、および毒物を含み、前記不純物、汚染物質、および毒物は、アセチレン系化合物、極性分子、酸素化物、硫黄化合物、窒素化合物、またはこれらの組み合わせであることを特徴とする、請求項1から請求項5のいずれか1項に記載の製造法。
- 前記芳香族化は、0.1hr −1と100hr −1の間の範囲の液空間速度、200℃と600℃の間の温度、1psiaと315psiaの間の圧力で行うことを特徴とする、請求項1から請求項6のいずれか1項に記載の製造法。
- 前記ブテン類を前記炭化水素原料にリサイクルした後、前記炭化水素原料は、前記メタセシス反応器に導入する前に、1−ブテン:2−ブテンのモル比が1:6から6:1となるよう異性化されることを特徴とする、請求項1から請求項7のいずれか1項に記載の製造法。
- 前記ブテン類は、前記炭化水素原料にリサイクルする前に異性化され、前記炭化水素原料は、前記メタセシス反応器に導入する前に、1:6から6:1の1−ブテン:2−ブテンのモル比を持つことを特徴とする、請求項1から請求項8のいずれか1項に記載の製造法。
- 前記工程a)のプロピレン:ヘキセン類のモル比は、1.5:1から2.5:1であることを特徴とする、請求項1から請求項9のいずれか1項に記載の製造法。
- 前記メタセシス生成物中のプロピレン:ヘキセン類のモル比は、1:1から3:1であることを特徴とする、請求項1から請求項10のいずれか1項に記載の製造法。
- 前記メタセシス生成物中のヘキセン類の濃度は、3mol%から20mol%であることを特徴とする、請求項1から請求項11のいずれか1項に記載の製造法。
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US10106474B2 (en) | 2018-10-23 |
SG185011A1 (en) | 2012-11-29 |
CN102858723A (zh) | 2013-01-02 |
US8722950B2 (en) | 2014-05-13 |
KR101685557B1 (ko) | 2016-12-12 |
EP2563749B1 (en) | 2016-07-20 |
SG10201503297SA (en) | 2015-06-29 |
CN102858723B (zh) | 2015-03-25 |
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US20140148629A1 (en) | 2014-05-29 |
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