Preparation of aluminium ammonium calcium phosphates using microwave radiation
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Kinga Łuczka
,
Daniel Sibera
Abstract
Microwave radiation was used in the acquisition of aluminium ammonium calcium phosphates. The substrates such as CaCO3, H3PO4, aqueous ammonia were reagent grade, whereas Al(OH)3 was prepared afresh. The influence of process parameters (pH 6 ± 2, molar ratios of Al3+: Ca2+: PO43− in the substrates, respectively 0.31: 0.62: 1; 0.5: 0.5: 1; 0.72: 0.36: 1) on the phase composition and the product properties was determined. Statistical software STATISTICA 10 was used for planning and evaluation of the experiments. The process parameters making it possible to acquire the material with the anticipated physicochemical properties were determined based on statistical evaluation of the planned research by the plan fractional factorial design at three levels 3(k−p). The phase composition of the samples was studied using XRD analysis. The specific surface area was calculated using the BET method and the particle size was determined by LSM. Materials with a molar ratio of Al3+: Ca2+ and Al3+: NH4+ in the range of 0.07–0.76 and 0.75–3.4, respectively, with an absorption oil number of 36–56 g per 100 g, S BET within 8.2–73 m2 g−1, and particle size in the range of 156–252 nm were obtained.
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© 2013 Institute of Chemistry, Slovak Academy of Sciences
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Artikel in diesem Heft
- Evaluation of waste products in the synthesis of surfactants by yeasts
- Investigation of CO2 and ethylethanolamine reaction kinetics in aqueous solutions using the stopped-flow technique
- Alkali pre-treatment of Sorghum Moench for biogas production
- Modelling of kinetics of microbial degradation of simulated leachate from tobacco dust waste
- Model predictive control-based robust stabilization of a chemical reactor
- Decomposition of meta- and para-phenylphenol during ozonation process
- Treatment of effluents from a membrane bioreactor by nanofiltration using tubular membranes
- Zeolite and potting soil sorption of CO2 and NH3 evolved during co-composting of grape and tobacco waste
- Liquid-solid equilibrium for the NaCl-NaHCO3-Na2CO3-H2O system at 45°C. Validation of mixed solvent electrolyte model
- Investigation of turbulent flow field in a Kenics static mixer by Laser Doppler Anemometry
- Effect of flow-rate on ethanol separation in membrane distillation process
- Preparation of aluminium ammonium calcium phosphates using microwave radiation
- Continuous dehydrochlorination of 1,3-dichloropropan-2-ol to epichlorohydrin: process parameters and by-products formation
- Preparation of sterically stabilized gold nanoparticles for plasmonic applications
- Synthesis and spectroscopic characterisation of (E)-2-(2-(9-(4-(1H-1,2,4-triazol-1-yl)butyl)-9H-carbazol-3-yl)vinyl)-3-ethylbenzo[d]thiazol-3-ium, a new ligand and potential DNA intercalator
- Microwave-assisted oxidation of alcohols by hydrogen peroxide catalysed by tetrabutylammonium decatungstate
- Dynamic shape and wall correction factors of cylindrical particles falling vertically in a Newtonian liquid
- Selective oxidation of metallic single-walled carbon nanotubes
