نتایج جستجو برای: reusable catalyst

تعداد نتایج: 53437  

2017
Penglei Wang Xin Zhou Yagang Zhang Liping Yang Keke Zhi Lulu Wang Letao Zhang Xinfeng Guo

Nano-dispersed Fe and Fe3O4 on reduced graphene oxide (Fe /Fe3O4-RGO) was prepared and characterized. The prepared Fe/Fe3O4-RGO was used as a magnetically separable Fenton-like catalyst and showed superior catalytic activity compared to Fe3O4-RGO and Fe3O4 as well as other Fenton-like catalysts for the removal of phenol. The Fe/Fe3O4-RGO achieved 100% removal efficiency for phenol within 30 min...

Journal: :Chemical communications 2009
James W Comerford James H Clark Duncan J Macquarrie Simon W Breeden

We have developed a heterogeneous silica catalyst that can effectively catalyse amide synthesis from acid and amine, without production of toxic by-products and with the advantage of being readily available, low cost, environmentally benign and reusable.

Journal: :Chemical communications 2009
Lingli Ni Ji Ni Yuan Lv Ping Yang Yong Cao

Decatungstate W(10)O(32)(4-) heterogenized on a novel hydrophobically-organomodified SBA-15 was proven an efficient, green and reusable catalyst for photooxygenation by oxygen of a range of aryl alkanes to the corresponding ketones under mild conditions.

Journal: :Chemical communications 2014
Renxi Jin Yang Yang Yunfeng Li Lin Fang Yan Xing Shuyan Song

Highly dispersive and ultrafine Au nanoparticles were effectively immobilized on the surface of hierarchical double-walled nickel silicate hollow nanofibers assembled by ultrathin nanosheets, which showed remarkable catalytic performances as an efficient and reusable hydrogenation catalyst.

Journal: :Chemical communications 2010
Shoichiro Sueoka Takato Mitsudome Tomoo Mizugaki Koichiro Jitsukawa Kiyotomi Kaneda

Monomeric vanadium oxide species is created on the surface of hydrotalcite (V/HT), which acts as a reusable solid catalyst for the highly efficient dehydration of amides into the corresponding nitriles.

2011
ALIREZA KHORSHIDI

Ru(III)-exchanged FAU-Y zeolite was used as an efficient reusable heterogeneous catalyst for preparation of oxindoles from condensation reaction of indoles with isatins under very mild reaction conditions.

Journal: :Chemical communications 2012
Ye Wang Hiroaki Kobayashi Kazuya Yamaguchi Noritaka Mizuno

Manganese oxide octahedral molecular sieves (OMS-2) could act as an efficient, reusable heterogeneous catalyst for transformation of various primary amines to the corresponding primary amides through the sequence of oxidative dehydrogenation and successive hydration.

Abdolhossain Massoudi Ali Ramazani Fariba Sadri Leila Dolatyari Mehdi Khoobi Sang Woo Joo Vahid Azizkhani

Nanomagnetic NiFe2O4 was used as the efficient, stable, reusable catalyst for selective oxidation of alcohols to their corresponding carbonyl compounds using oxone (potassium hydrogen monopersulfate) as oxidant in the presence of water as solvent at room temperature. The oxidation of various primary and secondary alcohols has been examined and related corresponding products were obtained wi...

Ali Ramazani, Fariba Sadri, Hamideh Ahankar, Mehdi Khoobi, Nahid Dayyani, Pegah Azimzadeh Asiabi Saeid Taghavi Fardood Sang Woo Joo

Nanomagnetic MgFe2O4 is an active, stable, and reusable catalyst for the oxidation of alcohols. The oxidation of various primary and secondary alcohols has been examined and related corresponding products were obtained in good yields. The reactions were carried out in the presence of water as solvent and oxone (at room temperature) or H2O2 (at 60 ºC) as an oxidant. The catalyst was investigated...

An  efficient  three-component  one-pot  synthesis  of 1-amidoalkyl-2-naphthols  from  2-naphthol, aldehydes, and acetamide using nano-SnO2as catalyst is described. The reactions were carried out at 80oC under water-solvent media. The structures of the compounds were characterized by IR, 1HNMR, 13C-NMR,  and  Mass  spectra  and  by  elemental  analysis.  The  advantages  of  the  effective meth...

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