Naslov
Influence of Preparation Conditionson on the Chemical Properties of the Aluminosilicate Precursors

Autori
Čižmek, Ankica ; Krznarić, Ivan ; Subotić, Boris

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
1st Euroworkshop On Zeolites - "Zeolite Synthesis: From Dream to Production": Scientific Program and Abstracts / Francesco di Renzo - Poitiers : Federation of European Zeolite Associations, 1996, P7-p7

Skup
1st Euroworkshop On Zeolites - "Zeolite Synthesis: From Dream to Production"

Mjesto i datum
La Rochelle, Francuska, 17.03.1996. - 20.03.1996

Vrsta sudjelovanja
Poster

Vrsta recenzije
Nije recenziran

Ključne riječi
Aluminosilicate gels; Liquid phase; Solid phase; Preparation conditions; Chemical properties; Physical properties

Sažetak
Physical and chemical properties of aluminosilicate gels were studied by various methods such as chemical analysis of the solid and the liquid phase, X-ray diffractometry, F.T.i.r., laser raman spectroscopy etc., during the ageing at elevated temperatures. Gels were prepared by mixing freshly prepared solutions of sodium silicate and sodium aluminate of different concentrations (0.1, 0.2, 0.3, 0.4 and 0.5 mol dm-3), previously thermostated on ageing temperature. The distribution of silicon and aluminum between solid and liquid phase and their changes during ageing are discussed in the term of the precipitation/dissolution processes and isomorphous replacement of aluminum from the liquid phase with silicon in the solid phase. Formation of structured subunits in the solid and the liquid phase was investigated by spectroscopic techniques and by measuring of the polycondensation stage of silicate anions in the liquid phase.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA