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Zeolite Synthesis and its Properties
Published in Subhash Bhatia, Zeolite Catalysis: Principles and Applications, 2020
Figure 3.1 shows a schematic diagram of synthesis of faujasite. Among the sources of cations, Al2O3 and SiO2 are those given in Table 3. Zeolite synthesis has frequently involved soluble silicates and soluble aluminates. Silica sols and silica gels have been another common source of silica. When the source of alumina is Al (OH)3 the hydroxide is usually dissolved in alkali to yield the soluble aluminate.
Water Supply Engineering
Published in P.K. Jayasree, K Balan, V Rani, Practical Civil Engineering, 2021
P.K. Jayasree, K Balan, V Rani
Use of sodium aluminate as a coagulant: Besides alum and iron salts, sodium aluminate (Na2Al2O4) is also sometimes used as a coagulant. This chemical when dissolved and mixed with water reacts with the salts of calcium and magnesium present in raw water, resulting in the formation of precipitates of calcium or magnesium aluminate. The chemical reactions that are involved are as follows: Na2Al2O4+Ca(HCO3)2→CaAl2O4↓+Na2CO3+CO2↑+H2ONa2Al2O4+CaCl2→CaAl2O4↓+2NaClNa2Al2O4+CaSO4→CaAl2O4↓+ Na2SO4
One pot facile chemical synthesis of Mn doped ZnAl2O4 nanostructured spinel materials for efficient photocatalytic degradation of malachite green dye under visible light irradiation
Published in Inorganic and Nano-Metal Chemistry, 2021
Manasai Arunkumar, Arputharaj Samson Nesaraj
Aluminates having general formula (MAl2O4) attract more researchers and scientists due to their excellent thermal stability, hydrophobicity and low surface acidity.[43] ZnAl2O4, a significant member from the aluminate family was commonly utilized as a catalysts or supports in catalytic reactions because of its higher thermal stability, lower surface acidity and hydrophobicity.[44–46] Apart from this, doped ZnAl2O4 was also used as photo-luminescent materials.[47,48] There were variety of methods available for the preparation of zinc aluminate such as solid state reaction,[49] co-precipitation,[50] sol–gel,[51] solvothermal,[52] hydrothermal,[53] glycothermal,[54] molten salt synthesis,[55] Pechini,[56] microwave assisted hydrothermal,[57] combustion,[58] polymeric precursors method,[59] template assisted synthesis,[60] thermovaporous,[61] spray pyrolysis,[62] theromolysis,[63] and sonochemical synthesis procedures.[64] Malchite green (MG) has a chemical formula of C23H25N2 and is a common triphenylmethane compound. MG was commonly used as a coloring agent in leather industries, textile dyeing and hair dyes.[65]