JP6790319B2 - 酸化的脱水素化反応用触媒の製造方法及びその触媒を用いた酸化的脱水素化方法 - Google Patents
酸化的脱水素化反応用触媒の製造方法及びその触媒を用いた酸化的脱水素化方法 Download PDFInfo
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- JP6790319B2 JP6790319B2 JP2018565339A JP2018565339A JP6790319B2 JP 6790319 B2 JP6790319 B2 JP 6790319B2 JP 2018565339 A JP2018565339 A JP 2018565339A JP 2018565339 A JP2018565339 A JP 2018565339A JP 6790319 B2 JP6790319 B2 JP 6790319B2
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- oxidative dehydrogenation
- dehydrogenation reaction
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- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
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- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Description
本出願は、2017年05月04日付の韓国特許出願第10−2017−0056741号及び該特許を優先権として2018年04月25日付で再出願された韓国特許出願第10−2018−0047836号に基づく優先権の利益を主張し、当該韓国特許出願の文献に開示された全ての内容は本明細書の一部として含まれる。
[数式1]
0≦T2/T1≦0.80
(前記数式1において、T2は、金属前駆体水溶液を共沈槽の下部に供給し、非活性ガス又はエアーの投入工程を含む本記載の触媒の製造方法によって製造された触媒の総100重量%中に含まれたα−Fe 2 O 3 結晶構造の含量であり、T1は、前記触媒の製造方法において、金属前駆体水溶液を共沈槽の下部に供給する代わりに、塩基性水溶液と共に点滴して共沈させ、非活性ガス又はエアーの投入工程を省略して製造された触媒100重量%中に含まれたα−Fe 2 O 3 結晶構造の含量であり、α−Fe 2 O 3 結晶構造の含量は、触媒のXRD回折分析のα−Fe 2 O 3 結晶構造のピーク(2theta:33〜34°)の大きさから測定される。)
塩化亜鉛(ZnCl 2 )0.122モル及び塩化第二鉄(FeCl 3 6H 2 O)0.243モルを水12.778モルに溶解させて金属前駆体水溶液を製造した。このとき、前記金属前駆体水溶液中に含まれた金属成分のモル比は、Fe:Zn=2:1であった。
前記実施例1において、共沈槽内に窒素を供給する工程を全て省略した以外は、前記実施例1と同様の方法で行った。
前記実施例1及び比較例1で製造された亜鉛フェライト触媒を使用して、次のような試験分析を行った。
前記実施例1及び比較例1で合成された亜鉛フェライト触媒を使用して、下記の酸化的脱水素化反応を経てブタジエンを生成し、その結果を、下記の表2にそれぞれ実施例1a〜1c及び比較例1a〜1dとして示した。
[数式2]
転化率(%)=(反応したブテン又は酸素のモル数/供給されたブテン又は酸素のモル数)×100
[数式3]
選択度(%)=(生成された1,3−ブタジエン又はCOx又はヘビー成分のモル数/反応したブテンのモル数)×100
[数式4]
ブタジエンの収率(%)=(生成された1,3−ブタジエンのモル数/供給されたブテンのモル数)×100
前記実施例1と同じ条件で金属前駆体水溶液を製造し、これを共沈槽の下部を介して供給し、アンモニア水はドロッピングして鉄と亜鉛を共沈させた以外は、実施例1と同様の方法で行った。
前記実施例2において、窒素(N 2 )の代わりにエアー(air)を供給した以外は、実施例2と同様の方法で行った。
前記実施例1〜3及び比較例1で製造されたフェライト系触媒前駆体スラリーの粒度分析の結果を、下記の表4及び図3に示す。ここで、スラリーの粒度分析は、Horiba社のLaser Particle Size Analyzer−960で測定し、このときに必要な屈折率は、スラリーでの主成分であるFeを基準として設定した。
前記と同じ方法及び条件で実施例2及び3によって合成された亜鉛フェライト触媒を使用して、酸化的脱水素化反応を経てブタジエンを生成し、その結果を、下記の表5にそれぞれ実施例2a〜2d及び実施例3a〜3cとして示し、比較のために比較例1a〜1dを再び記載した。
Claims (13)
- 酸化的脱水素化反応用触媒の製造方法であって、
3価のカチオン鉄(Fe)、並びに、Zn、Mg、Mn、Co、およびCuのいずれかから選択される2価のカチオン金属(A)を水に添加して金属前駆体水溶液を製造するステップと;前記金属前駆体水溶液と塩基性水溶液を、pHが6以上に調節された水溶液又は水が準備された共沈槽に添加して、鉄とA金属を共沈させるステップと;前記共沈された共沈物を焼成するステップと;を含み、
前記共沈時から共沈後まで;非活性ガス又はエアー(air)を前記共沈槽に供給する工程を行い、
前記酸化的脱水素化反応用触媒は、AFe 2 O 4 結晶構造を含む、酸化的脱水素化反応用触媒の製造方法。 - 前記共沈させるステップにおいて、前記金属前駆体水溶液は、前記共沈槽の下部を介して供給される、請求項1に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記共沈が完了した共沈溶液を攪拌;熟成;または攪拌及び熟成;させるステップをさらに含む、請求項1または2に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記攪拌中に共沈溶液に窒素(N2)ガスを投入する工程を行う、請求項3に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記3価のカチオン鉄(Fe)及び2価のカチオン金属(A)は、独立して、硝酸塩(nitrate)、アンモニウム塩(ammonium salt)、硫酸塩(sulfate)及び塩化物(chloride)からなる群から選択された1種以上である、請求項1から4のいずれか一項に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記2価のカチオン金属(A)は、亜鉛(Zn)である、請求項1から5のいずれか一項に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記共沈させるステップにおいて、共沈溶液のpHは7〜10に維持される、請求項1から6のいずれか一項に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記酸化的脱水素化反応用触媒は、AFe2O4結晶構造及びα−Fe2O3結晶構造を含む混合相である、請求項1から7のいずれか一項に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記共沈された共沈物は、前記共沈が完了した共沈溶液を乾燥;濾過;または乾燥及び濾過;させて収得される、請求項1から8のいずれか一項に記載の酸化的脱水素化反応用触媒の製造方法。
- 前記酸化的脱水素化反応用触媒は、下記数式1を満たす、請求項1から9のいずれか一項に記載の酸化的脱水素化反応用触媒の製造方法。
[数式1]
0≦T2/T1≦0.80
(前記数式1において、T2は、請求項2に記載の方法で製造された触媒の総100重量%中に含まれたα−Fe2O3結晶構造の含量であり、T1は、前記請求項1に記載の製造方法において非活性ガス又はエアーの供給工程を省略して製造された触媒100重量%中に含まれたα−Fe2O3結晶構造の含量であり、α−Fe2O3結晶構造の含量は、触媒のXRD回折分析のα−Fe2O3結晶構造のピーク(2theta:33〜34°)の大きさから測定される。) - 請求項1から10のいずれか1項に記載の製造方法で製造された酸化的脱水素化反応用触媒が充填された反応器に、ノルマルブテンを含有するC4混合物及び酸素を含む反応物を通過させながら酸化的脱水素化反応を行うステップを含む、酸化的脱水素化方法。
- 前記反応物は、空気、窒素、スチーム及び二酸化炭素から選択された1種以上をさらに含む、請求項11に記載の酸化的脱水素化方法。
- 前記酸化的脱水素化反応は、250〜430℃の反応温度、及び50〜2000h−1(ブテン基準)の気体空間速度(GHSV:Gas Hourly Space Velocity)で行う、請求項11または12に記載の酸化的脱水素化方法。
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