VPI-5: A Novel Large Pore Molecular Sieve

1987 ◽  
Vol 111 ◽  
Author(s):  
Mark E. Davis ◽  
Carlos Saldarriaga ◽  
Consuelo Montes ◽  
Juan Garces ◽  
Cyrus Crowder
Keyword(s):  
Molecular Sieves ◽  
Molecular Sieve ◽  
Large Pore

AbstractThis paper reports a novel family of aluminophosphate based molecular sieves denoted as VPI-5. These molecular sieves are the first to contain pores larger than 10 Å. The large pores of the VPI-5 sieves consist of long channels circumscribed by eighteen membered rings and are capable of adsorbing molecules excluded from other molecular sieves.

VPI-8:  A High-Silica Molecular Sieve with a Novel “Pinwheel” Building Unit and Its Implications for the Synthesis of Extra-Large Pore Molecular Sieves

1996 ◽  
Vol 118 (31) ◽  
pp. 7299-7310 ◽  
Author(s):  
Clemens C. Freyhardt ◽  
Raul F. Lobo ◽  
Shervin Khodabandeh ◽  
John E. Lewis, ◽  
Michael Tsapatsis ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Molecular Sieve ◽  
Building Unit ◽  
Large Pore ◽  
High Silica

ChemInform Abstract: VPI-8: A High-Silica Molecular Sieve with a Novel “Pinwheel” Building Unit and Its Implications for the Synthesis of Extra-Large Pore Molecular Sieves.

ChemInform ◽  
2010 ◽  
Vol 27 (48) ◽  
pp. no-no
Author(s):  
C. C. FREYHARDT ◽  
R. F. LOBO ◽  
S. KHODABANDEH ◽  
J. E. JUN. LEWIS ◽  
M. TSAPATSIS ◽  
...  
Keyword(s):  
Molecular Sieves ◽  
Molecular Sieve ◽  
Building Unit ◽  
Large Pore ◽  
High Silica

Molecular Sieve Synthesis using Metallocenes as Structure Directing Agents

1994 ◽  
Vol 368 ◽  
Author(s):  
Kenneth J. Balkus ◽  
Alexei G. Gabrielov ◽  
Netanya Sandler
Keyword(s):  
Metal Complex ◽  
Metal Complexes ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Microporous Materials ◽  
Synthesis And Characterization ◽  
Bifunctional Catalysts ◽  
Large Pore ◽  
High Silica

ABSTRACTWe have been exploring molecular sieve synthesis using metal complexes as templates. Our objectives were to affect the crystallization of new structures as well as prepare bifunctional catalysts via the encapsulation of metal complexes during synthesis. In this paper the results for the synthesis of SiO2, AlPO4 and SAPO molecular sieves in the presence of metallocenes will be presented. In particular, Cobalticinium ion, Cp2Co+, was found to be a template for Nonasil, AlPO4−5, AlPO4−16, SAPO−16 and CoAPO−16 which are known phases but require templates. The larger decamethyl derivative, CP*2Co+ has produced a novel high silica zeolite molecular sieve, UTD-1 as well as a new SAPO phase UTD-2 which appear to be large pore materials. In all cases, the metal complex is occluded intact and cannot be extracted. Aspects of the synthesis and characterization of these microporous materials are presented below.

Preparation and Characterization of Ni-Containing Aluminophosphate Molecular Sieves

2011 ◽  
Vol 418-420 ◽  
pp. 617-620
Author(s):  
Ying Sun ◽  
Lan Ying Ge
Keyword(s):  
Oxidation State ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Crystalline Form ◽  
Spectroscopic Techniques ◽  
Tetrahedral Coordination ◽  
Tetrahedral Geometry ◽  
Nickel Ions ◽  
Aluminophosphate Molecular Sieves

Aluminophosphate molecular sieve and Ni(II)-containing APO-5 materials were synthesized hydrothermally and characterized by various analytical and spectroscopic techniques. It indicates that the nickel ions with a divalent oxidation state can incorporate into the tetrahedral coordination in mesoporous aluminophosphate very well. The better crystallizing temperature is explored. A stronger crystalline form is obtained with the addition of HF. Further, microporous aluminophosphate molecular sieves and Ni(II) ions remain in a tetrahedral geometry even after calcination at 550 °C.

Studies on the crystallization of a novel, large-pore, high-silica molecular sieve, NCL-1

Zeolites ◽  
1994 ◽  
Vol 14 (5) ◽  
pp. 326-334 ◽  
Author(s):  
K.Ramesh Reddy ◽  
Veda Ramaswamy ◽  
R. Kumar ◽  
A.V. Ramaswamy
Keyword(s):  
Molecular Sieve ◽  
Large Pore ◽  
High Silica

Progress in Synthesis of Micro- and Mesoporous Composite Molecular Sieve

2011 ◽  
Vol 396-398 ◽  
pp. 1151-1156
Author(s):  
Wen Yuan Wu ◽  
Chun Wei Shi ◽  
Xue Bian
Keyword(s):  
Hydrothermal Synthesis ◽  
Microwave Radiation ◽  
Vapor Phase ◽  
Molecular Sieves ◽  
Molecular Sieve ◽  
Vapor Phase Transport ◽  
Mesoporous Composite ◽  
Composite Molecular Sieve ◽  
Potential Applications ◽  
Phase Transport

Micro- and mesoporous composite molecular sieves enable to achieve grades distribution of pore sizes and appropriate collocation of acidity,which have potential applications in catalysis and adsorption of large molecules.This review focus on some of the most recent results during the last decades.The techniques applied to synthesize different micro-mesoporous composite molecular sieves includes single template, dual template, crystallization of mesoporous walls, alkaline desilication, vapor-phase transport synthesis,and microwave radiation hydrothermal synthesis.

Unexpectedly low translational mobility of methane and tetrafluoromethane in the large-pore molecular sieve VPI-5

1995 ◽  
Vol 3 (4-5) ◽  
pp. 401-408 ◽  
Author(s):  
J. Kärger ◽  
W. Keller ◽  
H. Pfeifer ◽  
S. Ernst ◽  
J. Weitkamp
Keyword(s):  
Molecular Sieve ◽  
Translational Mobility ◽  
Large Pore

Adsorptive properties and stability of VPI-5, a large-pore molecular sieve

1992 ◽  
Vol 88 (22) ◽  
pp. 3349 ◽  
Author(s):  
Martyn B. Kenny ◽  
Kenneth S. W. Sing ◽  
Charis R. Theocharis
Keyword(s):  
Molecular Sieve ◽  
Large Pore ◽  
Adsorptive Properties
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