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Synthesis of Zeolites in the Presence of Diquaternary Alkylammonium Ions as Structure-Directing Agents
- Source :
- Oil & Gas Science and Technology - Revue de l'IFP. 62:819-825
- Publication Year :
- 2007
- Publisher :
- EDP Sciences, 2007.
-
Abstract
- This paper deals with the synthesis results obtained mostly from pure silica systems in the presence of (CH3 )3 N+ (CH2 )n N+ (CH3 )3 ions (n = 5 , 6, 9 or 10) in fluoride media, but also in the presence of (CH3 )3 N+ (CH2 )n O(CH2 )n N+ (CH3 )3 ions (n = 2 or 4) in hydroxide or fluoride media. A variety of zeolites form, namely ZSM-48, MTW-type, BEA-type, MFI-type, ITH-type zeolites, but also, in case of pronounced degradation of the template into N(CH3 )4 + or N(CH3 )3 , AST-type, MTN-type and RUT-type materials. The samples are characterized by XRD, SEM, thermal and elementary analyses, 1 H liquid NMR (after dissolution of the sample in HF aqueous solution) and solid-state NMR (19 F, 13 C, 27 Al) spectroscopy.
- Subjects :
- [CHIM.MATE] Chemical Sciences/Material chemistry
Aqueous solution
General Chemical Engineering
Energy Engineering and Power Technology
Ion
chemistry.chemical_compound
Fuel Technology
Nuclear magnetic resonance
Hydrofluoric acid
chemistry
Hydroxide
Zeolite
Spectroscopy
Dissolution
Fluoride
Nuclear chemistry
Subjects
Details
- ISSN :
- 12944475
- Volume :
- 62
- Database :
- OpenAIRE
- Journal :
- Oil & Gas Science and Technology - Revue de l'IFP
- Accession number :
- edsair.doi.dedup.....553d21553b040f100e1b7f6e0fb001ec