Hostname: page-component-84b7d79bbc-l82ql Total loading time: 0 Render date: 2024-07-30T20:23:40.854Z Has data issue: false hasContentIssue false
  • English
  • Français

The Influence of the Activity of Water on the Phase Composition of Aluminum Hydroxides Formed by Reaction of Amalgamated Aluminum with Water

Published online by Cambridge University Press:  01 July 2024

O. Lahodny-Šarc ,
Z. Dragčević  and
D. Došen-Šver
O. Lahodny-Šarc
Affiliation:
Mining, Geology and Petroleum Engineering Department, University of Zagreb, Yugoslavia
Z. Dragčević
Affiliation:
Technological Department, University of Zagreb, Yugoslavia
D. Došen-Šver
Affiliation:
Technological Department, University of Zagreb, Yugoslavia
Get access Rights & Permissions [Opens in a new window]

Abstract

The influence of the activity of water on the phase composition of aluminum hydroxides obtained by reaction of amalgamated aluminum with water has been studied. The reaction was carried out in solutions of water and dioxane, and in sodium chloride solutions of different concentrations; amorphous aluminum hydroxide was precipitated initially. The aging of this primary product to bayerite, pseudoboehmite, or an amorphous gel was controlled by the water content of the system. The pseudoboehmite has shown a significant reactivity when used as a source of alumina in the hydrothermal syntheses of kaolinite at relatively low temperature and pressure.

Резюме

Резюме

Изучалось влияние активности воды на фазовый состав гидроокисей алюминия по результатам реакции амальгамированного алюминия с водой. Реакция проводилась в растворах воды и диоксана и растворах хлористого натрия различной концентрации. Первоначально осаждалась аморфная гидроокись алюминия. Созревание этого первичного продукта до стадии бейерита, псевдобемита или аморфного геля контролировалось по содержанию воды в системе. Псевдобемит показал значительную реактивность при использовании в качестве источника алюминия в гидротермальном синтезе каолинита при относительно низких температуре и давлении.

Kurzreferat

Kurzreferat

Der Einfluß der Aktivität des Wassers auf die Phasenzusammenstellung von Aluminiumhydroxyden, welche durch Reaktion von amalgamiertem Aluminium mit Wasser erhalten wurden, ist untersucht worden. Die Reaktion wurde in Wasser-und Dioxanlösungen und in Natriumchloridlösungen,verschiedener Konzentrationen, ausgeführt. Das Aluminiumhydroxyd, welches zuerst ausfällt, ist amorph. Das Altern dieses primären Produkts zu Bayerit, Pseudoboehmit oder einem amorphen Gel wurde durch den Wassergehalt des Systems kontrolliert. Pseudoboehmit zeigte eine erhebliche Reaktivität, wenn es als Ausgangsmaterial für Alumina in der hydrothermalen Synthese von Kaoliniten bei relativer niedriger Temperatur und Druck benutzt wurde.

Keywords

AluminaAluminumBayeriteHydroxidePseudoboehmiteWater
Type
Research Article
Information
Clays and Clay Minerals , Volume 26 , Issue 2 , April 1978 , pp. 153 - 159
Copyright
Copyright © 1978, The Clay Minerals Society

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Chesworth, W. (1971) Use of aluminum amalgam in mineral synthesis at low temperature and 1 atmosphere total pressure: Clays & Clay Minerals 19, 337–339.CrossRefGoogle Scholar
Chesworth, W. (1972) The stability of gibbsite and boehmite at the surface of the earth: Clays & Clay Minerals 20, 369–374.CrossRefGoogle Scholar
Dautel, R. and Ziel, W. (1960) Ultrarotspektroskopische Untersuchungen an Koordinationsverbindungen des Aluminium-wasser-stoffs: Z. Elektrochem. 64, 1234–1244.Google Scholar
Lahodny-Šarc, O., Došen-Šver, D. and Bidgin, D. (1977) The influence of complexing agents on the hydrothermal synthesis of kaolinite: Proc. 7th Conf. Clay Mineral. Petrol., Karlovy Vary, Czech. 1976. In press.Google Scholar
Papée, D., Tertian, R. and Bias, R. (1958) Recherches sur la constitution des gels et des hydrates cristallisés d'alumine: Bull. Soc. Chim. Fr. 1301–1310.Google Scholar
Šarc-Lahodny, O. (1963) On the structure and physico-chemical properties of some synthetic aluminum hydroxides: D.Sc. Thesis, University of Zagreb, Yugoslavia.Google Scholar
Šarc-Lahodny, O. (1964) A contribution to the behaviour of the system Al/Hg-H2O-Dioxane: Proc. Symp. les Bauxites Oxydes et Hydroxydes d'Aluminium, Zagreb (1963), 143–160, Yugoslav Acad. Sci. Arts.Google Scholar
Souza Santos, P. de (1958) A new method for preparing scaly alumina: Nature No. 4634, 525.Google Scholar
Tertian, R., Calvet, E., Boivinet, P., Noel, M., Thibon, H. and Maillard, A. (1953) Contribution à l'étude des gels d'alumine: Bull. Soc. Chim. Fr. 100–108.Google Scholar
Watson, J. H. L., Vallejo-Freire, A., Souza Santos, P. de and Parsons, J. (1957) The fine structure and properties of fibrous alumina: Kolloid Z. 154, 4–15.CrossRefGoogle Scholar