{"title":"On the synthesis of nitrate enclathrated sodalite in organic solvents","authors":"M. Fechtelkord, B. Posnatzki, J.-Chr. Buhl","doi":"10.1016/S0144-2449(97)00098-5","DOIUrl":null,"url":null,"abstract":"<div><p>Hydrothermal synthesis of sodalite has been investigated in the system NaOCH<sub>3</sub>-2SiO<sub>3</sub>-Al<sub>2</sub>O<sub>3</sub>-NaNO<sub>3</sub>-(CH<sub>3</sub>OH, C<sub>5</sub>H<sub>11</sub>OH) 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 <sup>29</sup>Si, <sup>23</sup>Na MAS NMR, and <sup>23</sup>Na 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 <sup>1</sup>H <sup>13</sup>C CPMAS NMR and <sup>1</sup>H MAS NMR. Scanning-electron micrographs show crystals larger than 15 μm grown at 473 K in pentanol.</p></div>","PeriodicalId":23983,"journal":{"name":"Zeolites","volume":"19 5","pages":"Pages 334-342"},"PeriodicalIF":0.0000,"publicationDate":"1997-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S0144-2449(97)00098-5","citationCount":"10","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Zeolites","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0144244997000985","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 10
Abstract
Hydrothermal synthesis of sodalite has been investigated in the system NaOCH3-2SiO3-Al2O3-NaNO3-(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.
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