Diene condensation on zeolites, I. Reaction of alloocimene with α-methacrolein on β-zeolite

1997 ◽  
Vol 62 (2) ◽  
pp. 273-280 ◽  
Author(s):  
T. G. Kuznetsova ◽  
K. G. Ione ◽  
N. F. Salakhutdinov
Keyword(s):  
Diene Condensation ◽  
Β Zeolite

ChemInform Abstract: H-β-Zeolite-Catalyzed Hydroarylation of Styrenes.

ChemInform ◽  
2012 ◽  
Vol 43 (45) ◽  
pp. no-no
Author(s):  
Darapaneni Chandra Mohan ◽  
Rajendra D. Patil ◽  
Subbarayappa Adimurthy
Keyword(s):  
Β Zeolite

H-β-zeolite catalyzed transamidation of carboxamides, phthalimide, formamides and thioamides with amines under neat conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95313-95317 ◽  
Author(s):  
Sadu Nageswara Rao ◽  
Darapaneni Chandra Mohan ◽  
Subbarayappa Adimurthy
Keyword(s):  
Heterogeneous Catalyst ◽  
Solvent Free ◽  
Β Zeolite ◽  
Solvent Free Conditions ◽  
Recyclable Heterogeneous Catalyst

Efficient transamidation of unactivated carboxamides, phthalimides, formamides and thioamides with amines under solvent-free conditions using H-β-zeolite as a green and recyclable heterogeneous catalyst is described.

scholarly journals Precursores catalíticos de polioxometalatos tipo Anderson-Evans de FeMo, CoMo y NiMo soportados sobre zeolita β para la hidrodesulfuración de tiofeno/Catalytic precursors of β zeolite supported Anderson–Evans type FeMo, CoMo and NiMo polyoxometalates...

Prospectiva ◽  
2017 ◽  
Vol 16 (1) ◽  
pp. 34-40
Author(s):  
Esneyder Puello polo ◽  
Melissa Romero Baños ◽  
Jayson Fals Fals
Keyword(s):  
Β Zeolite ◽  
Los Grupos

Precursores catalíticos de polioxometalatos de FeMo, CoMo y NiMo tipo Anderson-Evans soportados sobre zeolita β en la hidrodesulfuración de tiofeno fue investigada. Los sólidos fueron caracterizados por análisis elemental (ICP plasma), área específica (SBET), difracción de rayos X (DRX) y espectroscopía infrarroja (FTIR). El soporte se impregnó con una solución acuosa del heteropolioxomolibdatos tipo Anderson-Evans de FeMo, CoMo y NiMo. El análisis elemental de Fe, Co, Ni y Mo dio resultados de acuerdo con la exactitud experimental de las relaciones atómicas nominales para cada precursor. La presencia de zeolita β, (NH4)3[FeMo6O24H6]•7H2O, (NH4)3[CoMo6O24H6]•7H2O y (NH4)4[NiMo6O24H6]•5H2O se verificó por DRX, mientras que el FTIR permitió asignar los estiramientos y flexiones de los grupos funcionales presentes en la estructura del heteropolioxomolibdato Anderson-Evans y la zeolita β. Los precursores catalíticos FeMo6/zeolita β, CoMo6/zeolita β y NiMo6/zeolita β mostraron mayor área específica (204-268 m2/g) que los heteropolioxomolibdatos tipo Anderson-Evans (1-3 m2/g). Los catalizadores provenientes de heteropolioxometalatos tipo Anderson-Evans de FeMo, CoMo y NiMo soportados en zeolita β presentaron mayor actividad HDS que los precursores no soportados (FeMo6/zeolita β y CoMo6/zeolita β), lo cual está asociado a la formación de mayor número de sitios activos.

New Synthesis Route to Uniform-sized β-Zeolite in the Presence of a Cationic Surfactant Containing Siloxane Moiety

2008 ◽  
Vol 37 (6) ◽  
pp. 668-669 ◽  
Author(s):  
Chithravel Venkatesan ◽  
Kenichi Komura ◽  
Yoshihiro Sugi
Keyword(s):  
Cationic Surfactant ◽  
Synthesis Route ◽  
Β Zeolite ◽  
New Synthesis

scholarly journals Adsorption of Lower Alcohols from Water Solutions on High Silica Zeolites, Mesoporous MCM-41 and AlPO4-5

1997 ◽  
Vol 15 (4) ◽  
pp. 289-299 ◽  
Author(s):  
Ivar M. Dahl ◽  
Elisabeth Myhrvold ◽  
Åse Slagtern ◽  
Michael Stöcker
Keyword(s):  
Zeolite Y ◽  
Micropore Volume ◽  
Water Solutions ◽  
Alkyl Chains ◽  
Β Zeolite ◽  
High Silica ◽  
High Silica Zeolites ◽  
Hydrophobic Adsorbents ◽  
Enhanced Adsorption ◽  
Mcm 41

Two dealuminated β-zeolites, zeolite Y and MCM-22 as well as silicalite, MCM-41 and AlPO4-5 have been studied as hydrophobic adsorbents in water solutions. Dealuminated β-zeolite, MCM-22 and silicalite all adsorb alcohols from water solutions. Enhanced adsorption is obtained for alcohols with longer alkyl chains. Adsorption in the practically most interesting 10–80% range of zeolite filling may adequately be described by Langmuir isotherms. The Langmuir adsorption constants are similar for β-zeolite, MCM-22 and silicalite. This indicates that the adsorption is independent of the pore structure for the alcohols tested in this study. The surface silanol density is however important, such that a low SiOH density is required to give lipophilic properties. In line with this, dealuminated zeolite Y, as prepared here, and MCM-41 give only a poor preference for alcohols from water. For the β-zeolite, the dealumination procedure is important for retaining the micropore volume and adsorption capacity of the zeolite. AlPO4-5 shows no potential as an adsorbent for alcohols from water solutions.

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