Book ChapterDOI
An study of cyclohexylpyrrolidine-derived quaternary organic cations as structure directing agents for synthesis of zeolites
A. Corma,I. Giménez,Sandra Leiva,Fernando Rey,María J. Sabater,German Sastre,Susana Valencia +6 more
TLDR
A suite of organic tetraalkylammonium cations obtained from the cyclohexylpyrrolidine has been essayed as structure directing agents (SDAs) of zeolites in a large range of synthesis conditions as discussed by the authors.Abstract:
A suite of organic tetraalkylammonium cations obtained from the cyclohexylpyrrolidine has been essayed as structure directing agents (SDAs) of zeolites in a large range of synthesis conditions. This family of SDAs has been able to drive the synthesis toward a different zeolite structures having 10 MR and/or 12MR pore apertures, such as ZSM-11 (MEL), ZSM-12 (MTW), Beta, EU-1 (EUO) and a new zeolite, named ITQ-23, depending on the structure directing agent, framework composition and synthesis conditions. The formation of the observed structures has been rationalized in terms of energetic stabilisation between the occluded organic and the inorganic microporous framework.read more
Citations
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Journal ArticleDOI
The chemistry of phase selectivity in the synthesis of high-silica zeolites
TL;DR: In this article, the roles that inorganic and organic components play in the synthesis of high-silica zeolites are discussed, and the combined roles that framework stability, framework/SDA interactions, and silanol defects may have in determining phase selectivity.
Patent
Method for preparing cha-type molecular sieves using colloidal aluminosilicate and novel structure directing agents
TL;DR: In this paper, a process for preparing CHA-type molecular sieves using a colloidal aluminosilicate in the presence of a cationic structure directing agent was presented.
Patent
Molecular sieve SSZ-104, its synthesis and use
TL;DR: In this paper, a new crystalline molecular sieve named SSZ-104 is presented, its synthesis in the presence of a structure directing agent comprising N-cyclohexylmethyl-N-ethylpyrrolidinium cations, and its use as an adsorbent and a catalyst.
Patent
Method for preparing cha-type molecular sieves using an alkali metal silicate precursor and novel structure directing agents
TL;DR: In this article, a process for preparing CHA-type molecular sieves using a colloidal aluminosilicate composition containing a cationic structure directing agent is described.
Journal ArticleDOI
The Spanish presence in the molecular sieve technology scenario
TL;DR: Molecular sieve research is a mature, but growing, area of interest within the Spanish scientific community as discussed by the authors, which produces about 10% of the total number of publications in the zeolite field, covering new aspects of synthesis, characterisation and catalytic applications of those materials.
References
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Journal ArticleDOI
Inorganic Solid Acids and Their Use in Acid-Catalyzed Hydrocarbon Reactions
TL;DR: In this article, the authors tried to describe perhaps the most important solid acids based on inorganic oxides, going from their preparation procedures and characterization, to their catalytic activity for a series of hydrocarbon reactions.
Journal ArticleDOI
The Hydrothermal Synthesis of Zeolites: History and Development from the Earliest Days to the Present Time
Colin S. Cundy,Paul A. Cox +1 more
Journal ArticleDOI
A general recursion method for calculating diffracted intensities from crystals containing planar faults
TL;DR: In this paper, a general recursion algorithm is described for calculating kinematical diffraction intensities from crystals containing coherent planar faults, which exploits the self-similar stacking sequences that occur when layers stack non-deterministically.
Journal ArticleDOI
Synthesis of all-silica and high-silica molecular sieves in fluoride media
TL;DR: The fundamental differences between the synthesis in hydroxide and fluoride media with respect to the properties of the materials obtained and the phase selectivity of the crystallization are discussed in this paper.
Journal ArticleDOI
The structure-controlling role of organic templates for the synthesis of porosils in the systems SiO2/template/H2O
Hermann Gies,B. Marker +1 more
TL;DR: In this paper, the structure-controlling role of organic molecules added as templates was investigated in the simplified system SiO2/template/H2O, where sixty-one molecules different in size, shape, and chemical character were used to synthesize 13 different silica host frameworks.
Related Papers (5)
Cooperative Structure Directing Role of the Cage-Forming Tetramethylammonium Cation and the Bulkier Benzylmethylpyrrolidinium in the Synthesis of Zeolite Ferrierite
Influence of alkali metal cations on the formation of zeolites under hydrothermal conditions with no organic structure directing agents
Antony Nearchou,Asel Sartbaeva +1 more