نتایج جستجو برای: brønsted acidic
تعداد نتایج: 35712 فیلتر نتایج به سال:
Catalytic Synthesis of Butyl Isovalerate by Brønsted Acidic Ionic Liquid under Microwave Irradiation
Exceptionally high surface area and ordered nanopores of a metal-organic framework (MOF) are exploited to encapsulate and homogeneously disperse a considerable amount of phosphotungstic acid (PTA). When combined with platinum nanoparticles positioned on the external surface of the MOF, the construct shows a high catalytic activity for hydroisomerization of n-hexane, a reaction requiring hydroge...
the silica boron sulfuric acid nanoparticles (sbsans) as an efficient heterogeneous solid acid catalyst with both brønsted and lewis acidic sites catalyzed the preparation of bis-4-hydroxycoumarin derivatives using reaction of aldehydes and 4-hydroxycoumarin under mild and solvent-free condition at room temperature. this new and efficient methodology has advantages in comparison with currently ...
The characterization and catalytic performance of Zn/ZSM-5 Zn-B/ZSM-5 catalysts in the n-hexane aromatization was reported. Catalysts were prepared by post-synthesis ion exchange thoroughly characterized means XRD, Py-FTIR, N2 adsorption, 27Al 11B MAS NMR spectroscopy electron microscopy techniques. incorporation zinc reduces Brønsted acid site density increases Lewis acidic sites final ZSM-5 b...
Brønsted Acidic Ionic Liquids as Efficient Catalysts for Clean Synthesis of Carbamatoalkyl Naphthols
The huge scale of plastic waste generation and its environmental consequences drive the demands for catalytic upcycling processes. Here, we report efficient polypropylene (PP) hydro-conversion over Ru Ni supported on a sol-gel anatase TiO2 (TiO2-A-SG). A small number Brønsted acid sites TiO2-A-SG enables hydrocracking, improving efficiency, steering selectivity towards high-valued C4-20, allowi...
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