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...

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Datum:2016
Hauptverfasser: Brei, V. V., Varvarin, A. M., Prudius, S. V.
Format: Artikel
Sprache:Englisch
Veröffentlicht: Chuiko Institute of Surface Chemistry National Academy of Sciences of Ukraine 2016
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Online Zugang:https://www.cpts.com.ua/index.php/cpts/article/view/399
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Назва журналу:Chemistry, Physics and Technology of Surface

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Chemistry, Physics and Technology of Surface
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Zusammenfassung: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.