JP5300738B2 - 前方層を使用して気相酸化するための触媒系及び方法 - Google Patents
前方層を使用して気相酸化するための触媒系及び方法 Download PDFInfo
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Description
触媒層及び/又は不活性層が前記ガスの流れ方向の反対側で隣接した触媒層の前方にあり、
ここで前方にある不活性リング及び/又は触媒リングの直径×高さの積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積当たりの表面積の指数は、少なくとも1つの後続の触媒層よりも大きい
ことによって特徴付けられる。
ここで前方にある不活性リング及び触媒リングの直径×高さの積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び触媒リングの体積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び触媒リングの体積当たりの表面積の指数は、少なくとも1つの後続の触媒層よりも大きい。
ここで前方にある不活性リング及び/又は触媒リングの直径×高さの積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積は、少なくとも1つの次の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積当たりの表面積の指数は、少なくとも1つの後続の触媒層よりも大きい。
触媒2:US 6586361による、例10(すなわち"触媒III")、列8、8×6×5mm(外径×高さ×内径)の幾何学的形状を有する。
前方層1:5×3×2mm(外径×高さ×内径)の幾何学的形状を有する不活性なステアタイトリング
前方層2:7×7×4mm(外径×高さ×内径)の幾何学的形状を有する不活性なステアタイトリング、これは各正面に図1aに記載の1.5mm×1.5mmの刻み目を有するノッチを有する。
前方層3:ステアタイトリング上の活性材料10.1%、その際に前記組成は触媒1の組成に相当し、7×7×4 mm(外径×高さ×内径)の幾何学的形状を有する
前方層4:8×6×5mm(外径×高さ×内径)の幾何学的形状を有する不活性なステアタイトリング。
試験1:本発明による、流れ方向の触媒系:前方層1 10cm、触媒1 170cm、触媒2 130cm
試験2:本発明による、流れ方向の触媒系:前方層2 10cm、触媒1 170cm、触媒2 130cm
試験3:本発明による、流れ方向の触媒系:前方層2 10cm、前方層3 40cm、触媒1 170cm、触媒2 130cm
試験4:本発明によらない、流れ方向の触媒系:前方層4 10cm、触媒1 170cm、触媒2 130cm。
4つの触媒系を、o−キシレン70g/Nm3のローディングで試験した。355℃の同じ塩浴温度で、以下の、第1表にまとめられたホットスポット位置が測定された。
Claims (9)
- o−キシレン及び/又はナフタレン及び分子酸素を含んでなるガス状流を、前記ガス状流の流れ方向に直列に配置され、その際に隣接した触媒層中の触媒の活性は互いに異なる少なくとも2つの触媒層に通すことにより気相酸化する方法であって、
触媒層及び/又は不活性層が前記ガスの流れ方向の反対側で隣接した触媒層の前方にあり、
ここで前方にある不活性リング及び/又は触媒リングの直径×高さの積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積当たりの表面積の指数は、少なくとも1つの後続の触媒層よりも大きい
ことを特徴とする、気相酸化方法。 - 前方にある不活性リング又は触媒リングの直径×高さの積が、少なくとも1つの後続の触媒層よりも少なくとも5〜10%小さいか、又は
前方にある不活性リング又は触媒リングの体積が、少なくとも1つの後続の触媒層よりも少なくとも5〜10%小さいか、又は
前方にある不活性リング又は触媒リングの体積当たりの表面積の指数が、少なくとも1つの後続の触媒層よりも少なくとも5〜10%大きい、
請求項1記載の方法。 - 前方にある不活性リング又は触媒リングの直径×高さの積が45mm2以下であるか、又は
前方にある不活性リング又は触媒リングの体積が170mm3以下であるか、又は
前方にある不活性リング又は触媒リングの体積当たりの表面積の指数が180mm-1以上である、
請求項1又は2記載の方法。 - 前記体積を、前記リングの各正面でのノッチにより低下させる、請求項1から3までのいずれか1項記載の方法。
- 前方にある不活性リング及び/又は触媒リングの床長が、全床長の2.5〜20%である、請求項1から4までのいずれか1項記載の方法。
- 前方にある不活性層又は触媒層がゼロの活性又は後続の第一の触媒層の活性を有する、請求項1から5までのいずれか1項記載の方法。
- 前方にある触媒層及び/又は不活性層が、不活性材料からなる領域及び触媒材料からなる領域を含み、その際に不活性材料からなる領域がガス入口の方にある、請求項1から6までのいずれか1項記載の方法。
- 不活性材料領域が前方層の全長の15〜40%を構成する、請求項7記載の方法。
- o−キシレン及び/又はナフタレン並びに分子酸素を含んでなるガス状流を気相酸化する方法を実施するための、但し触媒系がガス状流の流れ方向に直列に配置される少なくとも2つの触媒層を有し、その際に隣接した触媒層中の触媒の活性が互いに異なり、但し、触媒層及び/又は不活性層が前記ガスの流れ方向の反対側で隣接した触媒層の前方にある、触媒系であって、
ここで前方にある不活性リング及び/又は触媒リングの直径×高さの積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積は、少なくとも1つの後続の触媒層よりも小さいか、又は
前方にある不活性リング及び/又は触媒リングの体積当たりの表面積の指数は、少なくとも1つの後続の触媒層よりも大きい、
気相酸化方法を実施するための触媒系。
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PCT/EP2007/063810 WO2008077791A1 (de) | 2006-12-21 | 2007-12-12 | Katalysatorsystem und verfahren zur gasphasenoxidation unter verwendung einer vorlage |
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US8106220B2 (en) * | 2006-05-19 | 2012-01-31 | Basf Se | Preparation of phthalic anhydride by gas phase oxidation of O-xylene in a main reactor and postreactor |
WO2009124947A1 (de) * | 2008-04-07 | 2009-10-15 | Basf Se | Verfahren zum anfahren eines gasphasenoxidationsreaktors, der eine katalytisch aktive silber-vanadiumoxid-bronze enthält |
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RU2646601C2 (ru) | 2014-04-24 | 2018-03-06 | Клариант Интернэшнл Лтд | Катализаторная компоновка с оптимизированной порозностью для получения фталевого ангидрида |
DE102014005939A1 (de) | 2014-04-24 | 2015-10-29 | Clariant International Ltd. | Katalysatoranordnung mit optimierter Oberfläche zur Herstellung von Phthalsäureanhydrid |
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DE102019127790A1 (de) * | 2019-10-15 | 2021-04-15 | Clariant International Ltd | Neues Katalysatorsystem für die Herstellung von Maleinsäureanhydrid durch katalytische Oxidation von n-Butan |
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EP2106290B1 (de) | 2016-04-13 |
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