KR101973614B1 - 산화적 탈수소화 반응용 촉매 제조방법 - Google Patents
산화적 탈수소화 반응용 촉매 제조방법 Download PDFInfo
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Abstract
Description
도 2는 본 발명의 실시예 1 내지 5 및 비교예 2에 따라 제조된 촉매의 상(phase)에 대한 상대적 함량(중량%)를 나타낸 그래프이다.
도 3은 본 발명의 실시예 1 내지 5 및 비교예 2에 따라 제조된 촉매를 사용하여 부타디엔 제조 시의 부텐 전환율, 부타디엔 선택도 및 수율을 나타낸 그래프이다.
구분 | Fe:Zn | ZnFe2O4 | α-Fe2O3 | ZnO |
(몰비) | (중량%) | |||
실시예 1 | 2:1 | 85 | 15 | - |
실시예 2 | 3:1 | 70 | 30 | - |
실시예 3 | 4:1 | 52 | 48 | - |
실시예 4 | 5:1 | 46 | 54 | - |
실시예 5 | 6:1 | 38 | 62 | - |
비교예 1 | 2:1 | 86 | 14 | - |
비교예 2 | 2:1.5 | 96 | - | 4 |
비교예 3 | 1:0 | - | 100 | - |
비교예 4 | 2:1 | 100 | - |
구분 | 실시예 | 비교예 | |||||||
1 | 2 | 3 | 4 | 5 | 1 | 2 | 3 | 4 | |
Fe:Zn 몰비 | 2:1 | 3:1 | 4:1 | 5:1 | 6:1 | 2:1 | 2:1.5 | 1:0 | 2:1 |
부텐 전환율 | 75.26 | 75.78 | 80.32 | 80.98 | 53.63 | 57.31 | 5.23 | 27.07 | 48.36 |
1-부텐 전환율 | 79.77 | 76.60 | 81.45 | 83.27 | 58.36 | 59.00 | 8.93 | 21.97 | 50.69 |
트랜스-2-부텐 전환율 | 70.59 | 73.57 | 77.53 | 77.92 | 49.29 | 53.64 | 4.01 | 28.93 | 41.46 |
시스-3-부텐 전환율 | 80.33 | 78.93 | 84.47 | 84.85 | 57.57 | 62.86 | 4.59 | 27.15 | 58.74 |
1,3-부타디엔 선택도 | 85.98 | 88.25 | 89.71 | 89.75 | 86.72 | 80.00 | 31.04 | 45.04 | 88.39 |
1,3-부타디엔 수율 | 64.71 | 66.88 | 72.06 | 72.68 | 46.51 | 45.85 | 1.62 | 12.19 | 42.75 |
구분 | 실시예 | |
1 | 7 | |
금속 몰비 | 2:1 | 2:1 |
ZnFe2O4 중량% | 85 | 78 |
α-Fe2O3 중량% | 15 | 22 |
ZnO 중량% | - | - |
부텐 전환율 | 82.9 | 81.7 |
1-부텐 전환율 | 84.10 | 84.09 |
트랜스-2-부텐 전환율 | 80.90 | 83.37 |
시스-3-부텐 전환율 | 85.79 | 84.33 |
1,3-부타디엔 선택도 | 89.3 | 89.2 |
1,3-부타디엔 수율 | 74.0 | 72.9 |
Claims (16)
- (a) 3가 양이온 철(Fe) 전구체 및 2가 양이온 아연(Zn) 전구체를 몰비(Fe/Zn) 3 내지 5로 물에 용해시켜 전구체 수용액을 준비하는 단계;
(b) 암모니아 수용액이 준비된 공침조에 상기 전구체 수용액을 40 내지 50g/min의 속도로 점적시키되, 암모니아 수용액을 함께 이중 점적시켜 공침 용액의 pH를 일정하게 유지시키는 단계; 및
(c) 상기 공침 용액을 여과하여 공침물을 수득하는 단계;를 포함하되,
상기 전구체 수용액은 pH가 0 내지 4이고,
상기 (b) 단계는 상기 전구체 수용액의 점적이 완료된 공침 용액을 30분 내지 1시간 30분 동안 교반시키는 단계를 더 포함하고,
제조된 촉매는 ZnFe2O4 구조; 및 Fe2O3 구조를 포함하며,
상기 ZnFe2O4 함량은 46 내지 70 중량%이고 상기 Fe2O3 함량은 30 내지 54 중량%인 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 제1항에 있어서,
상기 산화적 탈수소화 반응용 촉매 제조방법은 상기 (c) 단계에서 수득된 공침물을 건조; 소성; 또는 건조 및 소성;시키는 단계를 더 포함하는 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 제1항에 있어서,
상기 (a) 단계의 3가 양이온 철(Fe) 전구체 및 2가 양이온 아연(Zn) 전구체는 각각 독립적으로 질산염(nitrate), 암모늄염(ammonium salt), 황산염(sulfate) 또는 염화물(chloride)인 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 삭제
- 제1항에 있어서,
상기 전구체 수용액은 5 중량% 농도 내지 10 중량% 농도를 갖는 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 삭제
- 제1항에 있어서,
상기 전구체 수용액은 3가 양이온 철(Fe) 전구체 4 중량% 이상 내지 10 중량% 미만 및 2가 양이온 아연(Zn) 전구체 0.5 중량% 이상 내지 10 중량% 미만을 증류수 80 중량% 초과 내지 95.5 중량% 이하에 용해시켜 준비한 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 제1항에 있어서,
상기 (b) 단계의 암모니아 수용액의 pH는 각각 9 내지 10인 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 삭제
- 제1항에 있어서,
상기 (b) 단계의 상기 전구체 수용액 및 상기 암모니아 수용액은 각각 별도의 분출구로부터 점적되는 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 삭제
- 제1항에 있어서,
상기 (b) 단계의 공침 용액의 pH는 8 초과 내지 11 미만으로 유지되는 것을 특징으로 하는 산화적 탈수소화 반응용 촉매 제조방법. - 삭제
- 삭제
- 제1항에 있어서,
상기 촉매는 XRD에 의해 측정된 결정 크기(crystallite size D)가 50 nm 이상인 것을 특징으로 하는
산화적 탈수소화 반응용 촉매 제조방법. - 제1항에 있어서,
상기 촉매는 BET법에 의해 측정된 BET 표면적이 4.0 m2/g 이상인 것을 특징으로 하는
산화적 탈수소화 반응용 촉매 제조방법.
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