On the synthesis of nitrate enclathrated sodalite in organic solvents

authored by

M. Fechtelkord, B. Posnatzki, J. Chr Buhl

Abstract

Hydrothermal synthesis of sodalite has been investigated in the system NaOCH₃-2SiO₂-Al₂O₃-NaNO ₃-(CH₃OH, C₅H₁₁OH) at temperatures of 423 K and 473 K. For the first time the organic solvents methanol or pentanol together with sodium methylate as base were used besides common inorganic educts as Si/Al source and sodium nitrate salt. The sodalites have been characterized by X-ray powder diffraction, as well as by ²⁹Si, ²³Na MAS NMR, and ²³Na DOR NMR measurements. IR-FT spectroscopy shows the successful enclathration of nitrate anions in the β-cages of sodalite. Reaction products of the solvent/base have been identified by {¹H} ¹³C CPMAS NMR and ¹H MAS NMR. Scanning-electron micrographs show crystals larger than 15 μm grown at 473 K in pentanol.

Organisation(s)

Institute of Mineralogy

Type

Article

Journal

Zeolites (druck)

Volume

19

Pages

334-342

No. of pages

9

ISSN

0144-2449

Publication date

11.1997

Publication status

Published

Peer reviewed

Yes

ASJC Scopus subject areas

General Environmental Science

Electronic version(s)

https://doi.org/10.1016/S0144-2449(97)00098-5 (Access: Closed)