On the role of small amines in zeolite synthesis
Article Abstract:
The structure of small amines to the zeolite product obtained was related by means of a crystallization study. Certain noncyclic amines were specific for the formation of 10-ring zeolites such as ZSM-22 and ZSM-23 at SiO2/Al2O3 = 200. Highly crystalline ZSM-22 was yielded by ethylmethylamine and diethylamine while ZSM-23 was yielded by isopropylamine. Cyclic amines such as piperazine produced the 12-ring pore system ZSM-12 which was consistent with their larger size. A different set of zeolites was obtained from ZSM-35 and MCM-22 at lower SiO2/Al2O3 ratios (40).
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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Aggregation mechanism of nanoslabs with zeolite MFI-type structure
Article Abstract:
Results demonstrate that progression of crystallization of colloidal Silicalite-1 with aqueous tetrapropylammonium in the open and closed systems can be monitored at defined composition and temperature. Data also indicate that the aggregation of molecules is mediated by the interaction potentials of the nanoslab planes carrying tetrapropylammonium cations.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 1999
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On the role of small amines in zeolite synthesis
Article Abstract:
An investigation of the effects of amines on high-pH zeolite crystallization reveals very strong affinity of the ZSM-5, ZSM-35 and MCM-22 frameworks for small amines. There is a beneficial pore-fill role for amines in many zeolite crystallizations.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2000
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