Preparation of hectorite clays utilizing organic and organometallic complexes during hydrothermal crystallization
- Argonne National Lab., IL (United States). Chemistry Div.
In this paper, a method for incorporating a remarkably diverse variety of intercalants directly during hydrothermal synthesis of hectorite layer-silicate clays is developed. Refluxing a gel of silica sol, magnesium hydroxide sol, and lithium fluoride for just 2 days in the presence of an organic or organometallic intercalant results in crystalline products containing either organic dye molecules such as ethyl violet and methyl green, dye molecules such as alcian blue that are based on a Cu(II) phthalocyanine complex, or transition metal complexes such as Ru(II) phenathroline and Co(III) sepulchrate. The following properties of any intercalant are found to be necessary: water solubility, (ii) positive charge, and (iii) thermal stability under moderately basic (pH 9-10) aqueous reflux conditions. The materials, and ion-exchanged natural hectorites for comparison, are characterized by x-ray powder diffraction, N{sub 2} BET surface area measurements, microanalysis, and thermal gravimetric analysis.
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 7087809
- Journal Information:
- Industrial and Engineering Chemistry Research; (United States), Journal Name: Industrial and Engineering Chemistry Research; (United States) Vol. 31:7; ISSN IECRE; ISSN 0888-5885
- Country of Publication:
- United States
- Language:
- English
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ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
CHEMICAL ANALYSIS
CLATHRATES
CLAYS
COHERENT SCATTERING
CRYSTALLIZATION
DIFFRACTION
DYES
FLUORIDES
FLUORINE COMPOUNDS
GRAVIMETRIC ANALYSIS
HALIDES
HALOGEN COMPOUNDS
HYDROGEN COMPOUNDS
HYDROTHERMAL SYNTHESIS
HYDROXIDES
INORGANIC ION EXCHANGERS
ION EXCHANGE MATERIALS
LITHIUM COMPOUNDS
LITHIUM FLUORIDES
LITHIUM HALIDES
MAGNESIUM COMPOUNDS
MAGNESIUM HYDROXIDES
MATERIALS
MICROANALYSIS
MONTMORILLONITE
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
PHASE TRANSFORMATIONS
PRODUCTION
QUANTITATIVE CHEMICAL ANALYSIS
SCATTERING
SILICATES
SILICON COMPOUNDS
SOL-GEL PROCESS
SOLUBILITY
SYNTHESIS
THERMAL ANALYSIS
THERMAL GRAVIMETRIC ANALYSIS
WATER
X-RAY DIFFRACTION