INFRA-RED STUDIES OF AMMONIATION OF PILLARED MONTMORILLONITES

dc.contributor.author	Witkowski S.
dc.contributor.author	Sojka Z.
dc.contributor.author	Dyrek K.
dc.contributor.author	Fijal J.
dc.contributor.author	Olkiewicz S.
dc.contributor.author	Fink P.
dc.contributor.author	Hobert H.
dc.date.accessioned	2021-01-29T07:11:11Z
dc.date.available	2021-01-29T07:11:11Z
dc.date.issued	2000
dc.identifier	https://elibrary.ru/item.asp?id=13803178
dc.identifier.citation	Clay Minerals, 2000, 35, 2, 345-355
dc.identifier.issn	0009-8558
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/24016
dc.description.abstract	Ammoniation of montmorillonites pillared with polyhydroxo-complexes of Al was performed in flow conditions at 773-1073 K and monitored by IR spectroscopy. Interaction of the clay with ammonia revealed exchange of terminal and bridging -OH groups by NH2-, NH- and N-species depending on the reaction temperature. Amination begins at 773 K while formation of NH groups starts at 873 K. Transformation of NH- into N-species occurs at 973 K. A mechanism for the ammoniation reaction is proposed and the series of the relative reactivity of OH groups was established: Si-150;OH > Mg-OH-Mg > Al-OH-Mg > Al-OH-Al. This series was rationalized in terms of accessibility of the OH groups.
dc.title	INFRA-RED STUDIES OF AMMONIATION OF PILLARED MONTMORILLONITES
dc.type	Статья

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