Одностадійний синтез ?-валеролактону з тетрагідрофурфурилового спирту та амідування ?-валеролактону на Сu/ZnO-Al2O3 каталізаторі
It has been found that tetrahydrofurfuryl alcohol transforms into ?-valerolactone over Сu/ZnO-Al2O3 catalyst at 270–280°С. ?-Valerolactone can be used for obtaining biodegradable polyesters and copolymers. Proposed Сu/ZnAl-1 catalyst containing 40 wt. % of CuO provides 40–50% alcohol conversion with...
Збережено в:
| Дата: | 2016 |
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| Автори: | , , |
| Формат: | Стаття |
| Мова: | Англійська |
| Опубліковано: |
Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine
2016
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| Теми: | |
| Онлайн доступ: | https://www.cpts.com.ua/index.php/cpts/article/view/399 |
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| Назва журналу: | Chemistry, Physics and Technology of Surface |
Репозитарії
Chemistry, Physics and Technology of Surface| Резюме: | It has been found that tetrahydrofurfuryl alcohol transforms into ?-valerolactone over Сu/ZnO-Al2O3 catalyst at 270–280°С. ?-Valerolactone can be used for obtaining biodegradable polyesters and copolymers. Proposed Сu/ZnAl-1 catalyst containing 40 wt. % of CuO provides 40–50% alcohol conversion with 80–85% lactone selectivity under hydrogen flow at 0.1 MPa. The reaction pathway from tetrahydrofurfurol to ?-valerolactone has been proposed: it is speculated that alcohol is initially dehydrogenated into tetrahydrofurfural, which rearranges to lactone. Vapor-phase amidation of ?-valerolactone with ammonia into ?-valerolactam, as raw material for obtaining polyamide nylon-5, was also investigated. It has been shown that among studied Cu-containing oxides Сu/ZnAl-1 catalyst provides higher 80 % ?-valerolactam selectivity at 90% lactone conversion at 280°С under ammonia, hydrogen and steam flow with strictly certain molar ratio. The process proceeds via disclosure of lactone cycle with intermediate 5-hydroxypentamide formation. |
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