Hydrothermal synthesis of zeolites from low-cost natural silica-alumina sources

Burriesci, N.; Crisafulli, M.L.; Giordano, N.; Bart, J. C. J.; Polizzotti, G.

doi:10.1016/0144-2449(84)90016-2

Cited by 27 publications

(16 citation statements)

References 7 publications

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“…The synthetic zeolites produced from natural glasses have variable purity depending on the composition of the starting materials (Breck, 1983). The formation of zeolites from such materials provides the opportunity for upgrading of mineral resources, which are either not exploited or are not utilized in other industrial applications (Burriesci et al, 1984;Giordano et al, 1987), thus enabling the possibility for production of materials with high added value.…”

Section: Introductionmentioning

confidence: 99%

“…Zeolite Na-P is a synthetic mineral which is crystallized hydrothermally from sodium aluminosilicate gels (Barter et al, 1959;Breck, 1974;Barrer, 1982), thermally treated kaolinite, i.e., metakaolinite (Barter, 1982), and various types of natural glasses in the temperature range of 60-160~ (Aiello et al, 1971;Burriesci et al, 1984;Antonucci et al, 1985;Giordano et al, 1987;Barth-Wirsching et al, 1993;Christidis et al, 1999). The synthetic zeolites produced from natural glasses have variable purity depending on the composition of the starting materials (Breck, 1983).…”

Section: Introductionmentioning

confidence: 99%

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Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Moirou

Vaxevanidou

Christidis

et al. 2000

Clays and clay miner.

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Abstract--This paper examines the ion-exchange properties of synthetic zeolite Na-P0, which was produced from perlite-waste fines and has a SiO2:A1203 ratio of 4.45:1 and a cation-exchange capacity (CEC) of 3.95 meq g ~. Although equilibrium is attained rapidly for all three metals, exchange is incomplete, with At(max) (maximum equilibrium fraction of the metal in the zeolite) being 0.95 for Pb, 0.76 for Zn, and 0.27 for Ni. In both Na ~ 89 and Na --* 89 exchange, the normalized selectivity coefficient is virtually constant for :~A~ (normalized equilibrium fraction of the metal in the zeolite) values of --<0.6, suggesting a pronounced homogeneity of the available exchange sites. The Gibbs standard free energy, AG ~ of the Na ---) 89 exchange calculated from the normalized selectivity coefficient is -3.11 kJ eq and, for the Na ~ 1/2Zn exchange, it is 2.75 kJ eq ~.Examination of the solid exchange products with X-ray diffraction (XRD) revealed a possible decrease in crystallinity of zeolite Pb-Pc as suggested by the significant broadening and disappearance of diffraction lines. This decrease is associated with a reduction of pore opening, as indicated from Fourier-transform infrared analysis (FTIR), which in turn results in a decrease of the amount of zeolitic water. Thermogravimetric-differential thermogravimetric (TG-DTG) analysis showed that water loss occurs in three steps, the relative significance of which depends on the type of exchangeable cation and subsequently on the type of complex formed with the cation and/or the zeolite channels. Zeolite Na-P c might be utilized in environmental applications, such as the treatment of acid-mine drainage and electroplating effluents.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Moirou

Vaxevanidou

Christidis

et al. 2000

Clays and clay miner.

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“…Pumice is a porous, natural glass formed from volcanic activity, used as a filtering agent for water clarifying, as a soft abrasive material in the textile industry (jeans stonewashing) and in a number of other industrial applications [7,8]. Pumice powder has also been used as silica and alumina source in the synthesis of zeolites [9][10][11]. The P-zeolitized pumice material Z-PM has been synthesized through a patented process involving a two-steps silica extraction by an alkali aqueous solution from waste pumice [12].…”

Section: Introductionmentioning

confidence: 99%

Selective Hydrogenation of Cinnamaldehyde on Pt and Pt-Fe Catalysts Supported on Zeolite P

et al. 2011

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Pt-and Pt-Fe based catalysts on zeolite P (ZP) support have been prepared and widely characterized by surface area and porosity, XRD, SEM, TEM, TPR, in order to investigate their morphological and microstructural properties. The catalysts have been tested in the selective liquid-phase hydrogenation of cinnamaldehyde. Kinetic tests have shown the beneficial effect of Fe promoter on the catalysts behaviour towards the selective formation of cinnamyl alcohol (85% selectivity to 90% conversion). The ZP supported catalysts have been compared with a catalyst supported on P-zeolitized Fe containing pumice (Z-PM), confirming the role of Fe Lewis acid site in promoting the reactivity of zeolite P-based materials.

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“…<100°C [20,22,25,28]. It was found that as the result of direct reaction with NaOH solution, it is possible to obtain faujasite, phillipsite and/or sodalite by the changing the synthesis conditions.…”

mentioning

confidence: 98%

“…Longer synthesis time promotes the formation of clinoptilolite, while mordenite is formed at temperatures higher than 140°C from sodium-rich solutions. However, as above, the SiO 2 /Al 2 O 3 ratio is the most important factor determining the nature of the crystallized phases in such a system [28].…”

mentioning

confidence: 99%

Low-temperature synthesis of zeolite from perlite waste — Part I: review of methods and phase compositions of resulting products

Król

Morawska

Mozgawa

et al. 2014

Materials Science-Poland

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In this paper a review of the recent studies on the synthesis of zeolites from expanded perlite under hydrothermal conditions is presented. Attention is paid to possible outcomes of synthesis from low cost glass material, such as perlite. The study also investigates the phase composition of zeolitic materials obtained by modification of by-product derived from an expanded perlite production process. The synthesis was made using the hydrothermal method with sodium hydroxide under autogenous pressure at a temperature below 100°C for 1 to 72 h. It was possible to obtain a zeolitic material at a temperature as low as 60°C using 4.0 M NaOH. The X-ray diffraction pattern showed the biggest peak intensity of zeolite X with 4.0 M NaOH at the temperature of 70°C. During synthesis at higher temperature zeolite Na-P 1 (with 3.0 M NaOH at 90°C) and hydroxysodalite (with 5.0 M NaOH at 90°C) were obtained.

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Hydrothermal synthesis of zeolites from low-cost natural silica-alumina sources

Cited by 27 publications

References 7 publications

Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Selective Hydrogenation of Cinnamaldehyde on Pt and Pt-Fe Catalysts Supported on Zeolite P

Low-temperature synthesis of zeolite from perlite waste — Part I: review of methods and phase compositions of resulting products

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Hydrothermal synthesis of zeolites from low-cost natural silica-alumina sources

Cited by 27 publications

References 7 publications

Ion Exchange of Zeolite Na-Pc with Pb2+, Zn2+, and Ni2+ Ions

Ion Exchange of Zeolite Na-Pc with Pb2+, Zn2+, and Ni2+ Ions

Selective Hydrogenation of Cinnamaldehyde on Pt and Pt-Fe Catalysts Supported on Zeolite P

Low-temperature synthesis of zeolite from perlite waste — Part I: review of methods and phase compositions of resulting products

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Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions

Ion Exchange of Zeolite Na-P_c with Pb²⁺, Zn²⁺, and Ni²⁺ Ions