Olefin epoxidation
Web15. okt 2024. · The development of sustainable enantioselective olefin epoxidation and alkane oxidation reactions under environmentally friendly conditions is an ultimate goal that has long been pursued in chemistry. Excellent examples are naturally occurring monooxygenases, which are able to catalyze a variety of biological oxidation reactions … WebFunctionalized olefin polymers, compositions and articles prepared therefrom, and method of making the same: 申请号: US12519504: 申请日: 2007-12-21: 公开(公告)号: US084
Olefin epoxidation
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WebThe structure of the resulting TiSBA15 catalysts and the Ti(IV) epoxidation intermediates (formed upon treatment of Ti(IV) materials with TBHP or H2O2) were probed using diffuse-reflectance UV−visible spectroscopy and infrared spectroscopy. A titanium-hydroperoxo species similar to that found in TS-1 is proposed for all catalysts. Web21. jul 2016. · Abstract. Hydrophobic imidazolium-based ionic liquids (IL) act as catalysts for the epoxidation of unfunctionalized olefins in water using hydrogen peroxide as oxidant. …
WebThe epoxidation of olefins catalyzed by molecular transition metal compounds is a research field, which has been extensively studied over the past forty years. To date, numerous … Web25. feb 2024. · Titanium–salalen complexes have recently solved a long-standing problem in homogeneous epoxidation catalysis by enabling the selective catalytic epoxidation of …
Web08. jan 2024. · The application of cytochrome P-450 inspired metal-porphyrin catalysts within the oxidation reaction, predominantly in olefin epoxidation, has advanced as a trending topic in research. A strenuous effort has been made to summarize the catalytic activity of the most promising metal-porphyrin-based homogeneous and heterogeneous catalysts … WebWe report platinum catalysts for the efficient aerobic oxidation of olefins to form epoxides and/or derived glycol monoethers. The catalysts—diaqua and dichloro PtII complexes …
Web28. apr 2024. · Group IV and V framework-substituted zeolites have been used for olefin epoxidation reactions for decades, yet the underlying properties that determine the …
WebPlausible mechanisms of olefin epoxidation catalysed by a V–salan model complex [V IV (O)(L)(H 2 O)] (1, L = (CH 2 NHCH 2 CH CHO −) 2) in the presence of H 2 O 2 are … clicks on social mediaWeb13. sep 2024. · Olefin epoxidation is a crucial chemical functionalization reaction that produces key chemical intermediates for the synthesis of various commercial end products. For example, propylene oxide is produced via the chlorohydrin process, and ethylene oxide is chiefly synthesized using molecular oxygen and silver catalysts. In addition to these … clicks on websiteWeb20. sep 2024. · The kinetic results reveal that the excellent catalytic performance arises from the synergistic effect between Fe (oxidation site) and Al sites (cycloaddition site), where the efficient CO 2 cycloaddition with epoxides in the presence of Al sites (3.91 wt %) positively shifts the oxidation equilibrium to olefin epoxidation over Fe sites (0.89 ... clicks operating hours evaton mallWeb05. okt 2024. · Here, we describe an electro-organic system with a phase-separated membrane-electrode assembly strategy, coupling in situ H 2 O 2 electrogeneration and olefin epoxidation, that delivers pure solvent … clicks open todayWeb13. jun 2024. · SBA-15 materials were functionalized through a post-synthetic methodology with molybdenum-Schiff bases to provide catalytic activity in epoxidation reactions. Thus, glycidoxypropyl functionalities were first attached to the surface of the mesostructured silica, followed by the reaction of the immobilized oxirane groups with 2-amino propyl pyridine. … clicks opening and closing timesclicks on youtubeWeb03. jul 2024. · In recent years, nanocatalysts have been considered as robust, heterogeneous alternatives to homogeneous catalysts. This work evaluates silver- and … clicks open near me