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Montmorillonite K30 Supported Tungstophosphoric Acid as an Efficient Catalyst for Condensation Reaction of Methyl N-phenylcarbamate for Generating Diurethane
- Tran, Anh Vy;
- Lee, Hye Jin;
- Baik, Joon Hyun;
- Baek, Jayeon;
- Kim, Yong Jin
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3초록
Methylene diphenyl-4,4 '-dicarbamate (MDC) was prepared via condensation reaction of methyl N-phenyl carbamate (MPC) and formaldehyde (HCHO) over montmorillonite K30 supported tungstophosphoric acid (TPA/K30) as an effective catalyst. A 26.2 wt.% TPA/K30 exhibited the highest product yield (75.5%) under a mild reaction temperature of 90 degrees C for 4 h at the molar ratio of MPC/HCHO = 4. Pyridine FTIR study indicates that Bronsted and Lewis acid sites in the TPA/K30 were found to be beneficial for achieving an excellent yield of MDC. Furthermore, the TPA/K30 could be reused at least four runs without significant loss in the original activity. [GRAPHICS]
키워드
TPA/montmorillonite; Methyl-N-phenyl carbamate; 4, 4 '-Methylene diphenyl dicarbamate; Condensation reaction; OXIDATIVE CARBONYLATION; PHENYL CARBAMATE; IONIC LIQUID; SELECTIVE SYNTHESIS; DIMETHYL CARBONATE; AROMATIC-AMINES; DEHYDRATION; CYCLIZATION; ZIRCONIA; CO2
- 제목
- Montmorillonite K30 Supported Tungstophosphoric Acid as an Efficient Catalyst for Condensation Reaction of Methyl N-phenylcarbamate for Generating Diurethane
- 저자
- Tran, Anh Vy; Lee, Hye Jin; Baik, Joon Hyun; Baek, Jayeon; Kim, Yong Jin
- 발행일
- 2022-07
- 유형
- Article; Early Access
- 권
- 152
- 호
- 7
- 페이지
- 2206 ~ 2214