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Anionic clay and hydrotalcite synthesis

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Authors
Radojević, Zagorka
Kostić-Gvozdenović, L.
Vasić, Radomir
Article (Published version)
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Abstract
Anionic clays are becoming more important for their application as catalysts, ion exchangers and adsorbers and for medical applications as well. Anionic clays are also used as stabilizers of dispersive systems of ceramic suspensions and drilling fluids in the oil industry, The anionic clays have an appropriate use in ceramic industry during raw materials activation. This paper presents the results of the hydrotalcite Mg6Al2 (OH)(16)(CO3)(4)H2O synthesis at room temperature of 18 degreesC and pH values of reactant mixtures of pH=12 (synthesis I) and pH=10.5 (synthesis II). The reactants were basic magnesium carbonate (suspended in water) and solutions of AlCl3, Na2CO3 and NaOH. The identification of the synthesized hydrotalcite included the chemical, X-ray, IR, TGA and DTA analyses. The product of the synthesis I is the mixture of the following minerals: hydrotalcite, manasseite, bayerite and brucite. The product of synthesis II is hydrotalcite, together with basic magnesium carbonate t...hat failed to react. The structural formula of synthetic hydrotalcite prepared at room temperature was determined by: [Mg0,64Al0,31(OH)(2)][(CO3)(0,16)0,62H(2)O]. For the synthesized hydrotalcite, the crystal size and morphology, the surface area and hence the catalytic activity varied dramatically with the crystallization temperature. At the crystallization temperature of 60 degreesC only thin, poorly crystallized platelets were obtained and very catalytic activity resulted.

Keywords:
synthesis / hydrotalcite / anionic clays
Source:
Euro Ceramics VII, Pt 1-3, 2002, 206-2, 1763-1766
Publisher:
  • Trans Tech Publications Ltd, Durnten-Zurich

DOI: 10.4028/www.scientific.net/KEM.206-213.1763

ISBN: 978-0878498826

ISSN: 1013-9826

WoS: 000172651400428

Scopus: 2-s2.0-0034782954
[ Google Scholar ]
2
1
URI
http://rims.institutims.rs/handle/123456789/22
Collections
  • Radovi istraživača / Researchers' publications
Institution/Community
Institut za ispitivanje materijala
TY  - JOUR
AU  - Radojević, Zagorka
AU  - Kostić-Gvozdenović, L.
AU  - Vasić, Radomir
PY  - 2002
UR  - http://rims.institutims.rs/handle/123456789/22
AB  - Anionic clays are becoming more important for their application as catalysts, ion exchangers and adsorbers and for medical applications as well. Anionic clays are also used as stabilizers of dispersive systems of ceramic suspensions and drilling fluids in the oil industry, The anionic clays have an appropriate use in ceramic industry during raw materials activation. This paper presents the results of the hydrotalcite Mg6Al2 (OH)(16)(CO3)(4)H2O synthesis at room temperature of 18 degreesC and pH values of reactant mixtures of pH=12 (synthesis I) and pH=10.5 (synthesis II). The reactants were basic magnesium carbonate (suspended in water) and solutions of AlCl3, Na2CO3 and NaOH. The identification of the synthesized hydrotalcite included the chemical, X-ray, IR, TGA and DTA analyses. The product of the synthesis I is the mixture of the following minerals: hydrotalcite, manasseite, bayerite and brucite. The product of synthesis II is hydrotalcite, together with basic magnesium carbonate that failed to react. The structural formula of synthetic hydrotalcite prepared at room temperature was determined by: [Mg0,64Al0,31(OH)(2)][(CO3)(0,16)0,62H(2)O]. For the synthesized hydrotalcite, the crystal size and morphology, the surface area and hence the catalytic activity varied dramatically with the crystallization temperature. At the crystallization temperature of 60 degreesC only thin, poorly crystallized platelets were obtained and very catalytic activity resulted.
PB  - Trans Tech Publications Ltd, Durnten-Zurich
T2  - Euro Ceramics VII, Pt 1-3
T1  - Anionic clay and hydrotalcite synthesis
EP  - 1766
SP  - 1763
VL  - 206-2
DO  - 10.4028/www.scientific.net/KEM.206-213.1763
ER  - 
@article{
author = "Radojević, Zagorka and Kostić-Gvozdenović, L. and Vasić, Radomir",
year = "2002",
abstract = "Anionic clays are becoming more important for their application as catalysts, ion exchangers and adsorbers and for medical applications as well. Anionic clays are also used as stabilizers of dispersive systems of ceramic suspensions and drilling fluids in the oil industry, The anionic clays have an appropriate use in ceramic industry during raw materials activation. This paper presents the results of the hydrotalcite Mg6Al2 (OH)(16)(CO3)(4)H2O synthesis at room temperature of 18 degreesC and pH values of reactant mixtures of pH=12 (synthesis I) and pH=10.5 (synthesis II). The reactants were basic magnesium carbonate (suspended in water) and solutions of AlCl3, Na2CO3 and NaOH. The identification of the synthesized hydrotalcite included the chemical, X-ray, IR, TGA and DTA analyses. The product of the synthesis I is the mixture of the following minerals: hydrotalcite, manasseite, bayerite and brucite. The product of synthesis II is hydrotalcite, together with basic magnesium carbonate that failed to react. The structural formula of synthetic hydrotalcite prepared at room temperature was determined by: [Mg0,64Al0,31(OH)(2)][(CO3)(0,16)0,62H(2)O]. For the synthesized hydrotalcite, the crystal size and morphology, the surface area and hence the catalytic activity varied dramatically with the crystallization temperature. At the crystallization temperature of 60 degreesC only thin, poorly crystallized platelets were obtained and very catalytic activity resulted.",
publisher = "Trans Tech Publications Ltd, Durnten-Zurich",
journal = "Euro Ceramics VII, Pt 1-3",
title = "Anionic clay and hydrotalcite synthesis",
pages = "1766-1763",
volume = "206-2",
doi = "10.4028/www.scientific.net/KEM.206-213.1763"
}
Radojević, Z., Kostić-Gvozdenović, L.,& Vasić, R.. (2002). Anionic clay and hydrotalcite synthesis. in Euro Ceramics VII, Pt 1-3
Trans Tech Publications Ltd, Durnten-Zurich., 206-2, 1763-1766.
https://doi.org/10.4028/www.scientific.net/KEM.206-213.1763
Radojević Z, Kostić-Gvozdenović L, Vasić R. Anionic clay and hydrotalcite synthesis. in Euro Ceramics VII, Pt 1-3. 2002;206-2:1763-1766.
doi:10.4028/www.scientific.net/KEM.206-213.1763 .
Radojević, Zagorka, Kostić-Gvozdenović, L., Vasić, Radomir, "Anionic clay and hydrotalcite synthesis" in Euro Ceramics VII, Pt 1-3, 206-2 (2002):1763-1766,
https://doi.org/10.4028/www.scientific.net/KEM.206-213.1763 . .

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