Catalysis by heteropoly compounds. 20. An NMR study of ethanol dehydration in the pseudoliquid phase of 12-tungstophosphoric acid

1992 ◽  
Vol 114 (8) ◽  
pp. 2836-2842 ◽  
Author(s):  
Kwan Young Lee ◽  
Takeo Arai ◽  
Shinichi Nakata ◽  
Sachio Asaoka ◽  
Toshio Okuhara ◽  
...  
Keyword(s):  
Tungstophosphoric Acid ◽  
Heteropoly Compounds ◽  
Ethanol Dehydration ◽  
Nmr Study ◽  
Pseudoliquid Phase

Ethylene production via catalytic ethanol dehydration by 12-tungstophosphoric acid@ceria-zirconia

Fuel ◽  
2019 ◽  
Vol 239 ◽  
pp. 491-501 ◽  
Author(s):  
Maria Clara H. Clemente ◽  
Gesley Alex V. Martins ◽  
Elon F. de Freitas ◽  
José A. Dias ◽  
Sílvia C.L. Dias
Keyword(s):  
Ethylene Production ◽  
Tungstophosphoric Acid ◽  
Ethanol Dehydration

Ethanol dehydration over Keggin type tungstophosphoric acid and its potassium salts supported on carbon

2019 ◽  
Vol 128 (1) ◽  
pp. 121-137 ◽  
Author(s):  
Ivanka Holclajtner-Antunović ◽  
Snežana Uskoković-Marković ◽  
Alexandru Popa ◽  
Anka Jevremović ◽  
Bojana Nedić Vasiljević ◽  
...  
Keyword(s):  
Tungstophosphoric Acid ◽  
Ethanol Dehydration ◽  
Potassium Salts ◽  
Keggin Type

NMR Study of Proton Sites in Group I Salts of 12-Tungstophosphoric Acid

2007 ◽  
Vol 111 (21) ◽  
pp. 7720-7726 ◽  
Author(s):  
Steven F. Dec ◽  
George M. Jacobsen ◽  
James L. Horan ◽  
Andrew M. Herring
Keyword(s):  
Tungstophosphoric Acid ◽  
Nmr Study ◽  
Group I

Michael addition in the pseudoliquid phase of heteropoly compounds

1998 ◽  
Vol 134 (1-3) ◽  
pp. 237-242 ◽  
Author(s):  
Toko Kengaku ◽  
Youichi Matsumoto ◽  
Kyutae Na ◽  
Makoto Misono
Keyword(s):  
Michael Addition ◽  
Heteropoly Compounds ◽  
Pseudoliquid Phase

scholarly journals Reactivity of 12-tungstophosphoric acid and its inhibitor potency toward Na + /K + -ATPase: A combined 31 P NMR study, ab initio calculations and crystallographic analysis

2017 ◽  
Vol 176 ◽  
pp. 90-99 ◽  
Author(s):  
Nada Bošnjaković-Pavlović ◽  
Danica Bajuk-Bogdanović ◽  
Joanna Zakrzewska ◽  
Zeyin Yan ◽  
Ivanka Holclajtner-Antunović ◽  
...  
Keyword(s):  
Ab Initio Calculations ◽  
Ab Initio ◽  
Crystallographic Analysis ◽  
Tungstophosphoric Acid ◽  
Nmr Study

Dehydrogenation, Deamination and Disproportionation of Diethylamine over Heteropoly Compounds

1995 ◽  
Vol 60 (12) ◽  
pp. 2047-2056 ◽  
Author(s):  
Abdel-Ghaffar A. Ali ◽  
Laila I. Ali
Keyword(s):  
Reaction Mechanism ◽  
Continuous Flow ◽  
Flow System ◽  
Tungstophosphoric Acid ◽  
Lewis Acidity ◽  
Heteropoly Compounds ◽  
Molybdophosphoric Acid ◽  
System Transformation ◽  
Continuous Flow System

In a continuous flow system, transformation of diethylamine over heteropoly compounds was studied at 250 to 350 °C. It was found that ammonium molybdophosphate and tungstophosphate are the most active catalysts while copper molybdophosphate is the most stable one. 12-Molybdophosphoric acid and its salts were highly selective catalysts for dehydrogenation of diethylamine to ethyliden- ethylamine whereas 12-tungstophosphoric acid and its salts directed the reaction selectively to deamination. The role of Lewis acidity of metal cations, Bronsted acidity and basic sites in the reaction mechanism is discussed.

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