Selective Hydrogenation of Aromatic Ketone over Pt@Y Zeolite through Restricted Adsorption Conformation of Reactants by Zeolitic Micropores

ChemCatChem ◽  
2020 ◽  
Vol 12 (7) ◽  
pp. 1948-1952 ◽  
Author(s):  
Qiang Chen ◽  
Haozhe Kang ◽  
Xuan Liu ◽  
Kun Jiang ◽  
Yunfei Bi ◽  
...  
Keyword(s):  
Selective Hydrogenation ◽  
Aromatic Ketone ◽  
Y Zeolite

Modelling kinetics and deactivation for the selective hydrogenation of an aromatic ketone over Pd/SiO2

2007 ◽  
Vol 62 (18-20) ◽  
pp. 5322-5329 ◽  
Author(s):  
Nakul Thakar ◽  
Rob J. Berger ◽  
Freek Kapteijn ◽  
Jacob A. Moulijn
Keyword(s):  
Selective Hydrogenation ◽  
Aromatic Ketone

Selective hydrogenation of cinnamaldehyde over Ru/Y zeolite

2004 ◽  
Vol 217 (1-2) ◽  
pp. 145-154 ◽  
Author(s):  
Jan Hájek ◽  
Narendra Kumar ◽  
Päivi Mäki-Arvela ◽  
Tapio Salmi ◽  
Dmitry Yu Murzin
Keyword(s):  
Selective Hydrogenation ◽  
Y Zeolite

An analytical microscopic study of metals in fluidized catalytic cracking catalyst

1986 ◽  
Vol 44 ◽  
pp. 854-855
Author(s):  
Clifford S. Rainey
Keyword(s):  
Electron Microscopy ◽  
Spatial Distribution ◽  
Catalytic Cracking ◽  
Catalyst Deactivation ◽  
Coke Formation ◽  
Acid Sites ◽  
Y Zeolite ◽  
Fcc Catalyst ◽  
Fluidized Catalytic Cracking ◽  
High Regeneration

The spatial distribution of V and Ni deposited within fluidized catalytic cracking (FCC) catalyst is studied because these metals contribute to catalyst deactivation. Y zeolite in FCC microspheres are high SiO2 aluminosilicates with molecular-sized channels that contain a mixture of lanthanoids. They must withstand high regeneration temperatures and retain acid sites needed for cracking of hydrocarbons, a process essential for efficient gasoline production. Zeolite in combination with V to form vanadates, or less diffusion in the channels due to coke formation, may deactivate catalyst. Other factors such as metal "skins", microsphere sintering, and attrition may also be involved. SEM of FCC fracture surfaces, AEM of Y zeolite, and electron microscopy of this work are developed to better understand and minimize catalyst deactivation.

Selective Hydrogenation of Benzene to Cyclohexene over Ru-Zn Catalyst with Nanosized Zirconia as Dispersant

2010 ◽  
Vol 31 (2) ◽  
pp. 150-152
Author(s):  
Zhongyi LIU ◽  
Haijie SUN ◽  
Dongbin WANG ◽  
Wei GUO ◽  
Xiaoli ZHOU ◽  
...  
Keyword(s):  
Selective Hydrogenation

Selective Hydrogenation of Crotonaldehyde over Pt/Ce0.8La0.2O1.9 Catalysts

2011 ◽  
Vol 32 (3) ◽  
pp. 513-519
Author(s):  
Ping CHEN ◽  
Guanqun XIE ◽  
Haiying ZHENG ◽  
Lin ZHU ◽  
Mengfei LUO
Keyword(s):  
Selective Hydrogenation

Effects of Reduction Temperature on Selective Hydrogenation of Crotonalde-hyde over Ir/ZrO2 Catalyst

2013 ◽  
Vol 33 (2) ◽  
pp. 348-353
Author(s):  
Lin ZHU ◽  
Jiqing LU ◽  
Guanqun XIE ◽  
Ping CHEN ◽  
Mengfei LUO
Keyword(s):  
Selective Hydrogenation ◽  
Reduction Temperature

A Facile One-pot Synthesis of Substituted Quinolines via Cascade Friedlander Reaction from Isoxazoles with Ammonium Formate-Pd/C and Ketones

2020 ◽  
Vol 17 (3) ◽  
pp. 211-215
Author(s):  
Da Chen ◽  
Xuan Wang ◽  
Runnan Wang ◽  
Yao Zhan ◽  
Xiaohan Peng ◽  
...  
Keyword(s):  
Hydrogen Transfer ◽  
Ammonium Formate ◽  
Aromatic Ketone ◽  
Reaction Conditions ◽  
One Pot ◽  
Diverse Range ◽  
Strong Base ◽  
Aromatic Ketones ◽  
Substituted Quinolines ◽  
New Strategy

The Friedlander reaction is the most commonly used method to synthesis substituted quinolines, the essential intermediates in the medicine industry. A facile one-pot approach for synthesizing substituted quinolines by the reaction of isoxazoles, ammonium formate-Pd/C, concentrated sulfuric acid, methanol and ketones using Friedlander reaction conditions is reported. Procedures for the synthesis of quinoline derivatives were optimized, and the yield was up to 90.4%. The yield of aromatic ketones bearing electron-withdrawing groups was better than the ones with electron-donating substituents. The structures of eight substituted quinolines were characterized by MS, IR, H-NMR and 13CNMR, which were in agreement with the expected structures. The mechanism for the conversion was proposed, which involved the Pd/C catalytic hydrogen transfer reduction of unsaturated five-membered ring of isoxazole to produce ortho-amino aromatic ketones. Then the nucleophilic addition of with carbonyl of the ketones generated Schiff base in situ, which underwent an intermolecular aldol reaction followed by the elimination of H2O to give production of substituted quinolines. This new strategy can be readily applied for the construction of quinolines utilizing a diverse range of ketones and avoids the post-reaction separation of the o-amino aromatic ketone compounds. The conventionally used o-amino aromatic ketone compounds in Friedlander reaction to prepare substituted quinoline are laborious to synthesize and are apt to self-polymerize. While oxazole adopted in this work can be prepared at ease by the condensation of benzoacetonitrile and nitrobenzene derivatives under the catalysis of a strong base. Moreover, the key features of this protocol are readily available starting materials, excellent functional group tolerance, mild reaction conditions, operational simplicity, and feasibility for scaling up.

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