KR20180004792A - 엑폭시화 공정 - Google Patents
엑폭시화 공정 Download PDFInfo
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- KR20180004792A KR20180004792A KR1020177035470A KR20177035470A KR20180004792A KR 20180004792 A KR20180004792 A KR 20180004792A KR 1020177035470 A KR1020177035470 A KR 1020177035470A KR 20177035470 A KR20177035470 A KR 20177035470A KR 20180004792 A KR20180004792 A KR 20180004792A
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- silver
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- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
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- Structural Engineering (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Geology (AREA)
- Catalysts (AREA)
- Epoxy Compounds (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
- Porous Artificial Stone Or Porous Ceramic Products (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
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Abstract
Description
도 2는 종래 기술 및 본 발명에 따른 선택도 대 작동 시간을 플롯팅한 산화 에틸렌 촉매 및 공정에 대한 그래프이다.
Claims (12)
- 은(silver)-기반 에폭시화 촉매의 성능 향상 방법으로서,
상기 촉매는,
적어도 80%의 알파 알루미나를 포함하고, 0.3 mL/g 내지 1.2 mL/g의 동공 부피, 0.3 m2/g 내지 3.0 m2/g의 표면적, 그리고 7 이하의 비틀림, 4 이하의 수축 및 30 밀리다시 이상의 투과도 중 적어도 하나를 제공하는 동공 아키텍처(pore architecture)를 가지는 담체(carrier);
상기 담체 상에 및/또는 내에 위치되는 촉매량의 은(silver); 및
상기 담체 상에 위치되는 촉진량의 하나 이상의 촉진제
를 포함하는 것이고,
약 200℃ 내지 약 230℃의 온도에서 상기 은-기반 에폭시화 촉매의 존재 하에서, 약 2.5:1 내지 약 12:1의 비율로 존재하는 에틸렌 및 산소를 함유하는 피드 가스(feed gas) 조성물을 반응시킴으로써 에폭시화 반응을 개시하는 것; 및
후속적으로 상기 온도를 단계적으로 또는 연속적으로 증가시키는 것
을 포함하는, 은-기반 에폭시화 촉매의 성능 향상 방법.
- 제 1 항에 있어서,
상기 후속적으로 증가시키는 단계는 단계적으로 수행되는 것인, 방법.
- 제 1 항에 있어서,
상기 피드 가스 조성물은 약 20 mol% 내지 약 35 mol%의 에틸렌, 약 3 mol% 내지 약 8 mol%의 산소, 및 2 mol% 미만의 이산화탄소를 함유하는 것인, 방법.
- 제 1 항에 있어서,
상기 하나 이상의 촉진제는, 원소 주기율표의 1족 알칼리 금속 촉진제, 하나 이상의 전이 금속, 하나 이상의 원소 주기율표의 2족 알칼리 토금속, 또는 이들의 임의의 조합을 포함하는 것인, 은-기반 에틸렌 에폭시화 촉매.
- 제 1 항에 있어서,
상기 후속적으로 증가시키는 단계는, 제 2 온도까지 약 5℃ 내지 약 10℃의 단계적 온도 증가, 상기 제 2 온도에서 약 25 시간 내지 약 100 시간 동안 유지, 후속적으로 제 3 온도까지 약 5℃ 내지 약 10℃의 단계적 증가, 및 약 25 시간 내지 약 100 시간 동안 상기 제 3 온도에서 유지를 포함하는 것인, 방법.
- 제 1 항에 있어서,
상기 후속적으로 증가시키는 단계는, 이전 온도 단계보다 약 5℃ 내지 약 10℃ 더 높은 각각의 온도 단계를 이용하여 상기 온도를 하나 이상의 더 높은 온도 단계들로 단계적으로 증가시키는 것을 포함하는 것인, 방법.
- 제 2 항에 있어서,
각각의 상기 온도 단계는 약 20 시간 내지 약 100 시간의 기간 동안 유지되는 것인, 방법.
- 제 1 항에 있어서,
상기 하나 이상의 전이 금속은 레늄, 몰리브덴, 텅스텐, 또는 이들의 임의의 조합을 포함하는 것인, 은-기반 에틸렌 에폭시화 촉매.
- 제 1 항에 있어서,
상기 원소 주기율표의 1족 알칼리 금속 촉진제는 세슘, 리튬, 소듐, 포타슘, 및 루비듐으로 이루어진 군으로부터 선택되는 것인, 은-기반 에틸렌 에폭시화 촉매.
- 제 1 항에 있어서,
상기 하나 이상의 촉진제는 레늄, 세슘 및 리튬의 촉진 조합을 포함하는 것인, 은-기반 에틸렌 에폭시화 촉매.
- 제 1 항에 있어서,
상기 촉매량의 은(silver)은 10 중량% 내지 50 중량%인 것인, 은-기반 에틸렌 에폭시화 촉매.
- 제 1 항에 있어서,
상기 담체는 20 부피% 미만의 함량의 판상(platelet) 모폴로지를 갖는 알루미나 결정(crystallites)을 가지는 것인, 은-기반 에틸렌 에폭시화 촉매.
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| PCT/US2016/035478 WO2016196767A1 (en) | 2015-06-02 | 2016-06-02 | Epoxidation process |
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