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T1 - Synthesis and characterization of zeolite/Fe3O4 nanocomposite by green quick precipitation method

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Synthesis and Characterization of Ca and Na Zeolites ..

AB - A green quick precipitation method was successfully used for synthesis of magnetic iron oxide nanoparticles (Fe3O4-NPs) on the surface of sodium/potassium type zeolite. Ferric chloride, ferrous chloride and sodium hydroxide aqueous solutions were used in the synthesis and coating of the Fe3O4-NPs on the surface of the zeolite to produce the zeolite/magnetic iron oxide nanocomposite (zeolite/Fe3O4 -NCs). The reaction was performed in aqueous suspension phase under the ambient condition as green chemistry method. Characterization with Fourier transforms infrared spectroscopy (FT-IR), powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), energy dispersive X-ray fluorescence (EDXF) and transmission electron microscopy (TEM) confirmed the formation of Fe3O4-NPs with mean particle sizes of 3.55±1.02 nm on the surface of the zeolite.

20/01/2005 · Zeolites Synthesized from Class F Fly Ash and Sodium ..

We are best Sodium aluminates manufacturer, Sodium aluminates supplier, Sodium aluminates exporter, Sodium.
Synthesis of Common Alum mixed with hot, aqueous Sodium Hydroxide solution, dissolving the Aluminum as the Aluminate Ion, Al(OH).
Synthesis of micro-crystals of transparent cobalt aluminate, shrouded in siliceous material, from Co(II)-exchanged zeolite X Matthew Thomas Jamie Lodge a, Peter.
Mesoporous alumina (MA) has attracted much attention because of its potential industrial applications.

PDF Downloads : Oriental Journal of Chemistry

Synthesis of zeolites Na-A and Na-X from tablet compressed and calcinated coal fly ash

Rangkaian siri sintetik zeolit telah berjaya disintesiskan daripada larutan natrium aluminosilikat dengan kepekatan Si dari 1 hingga 8 molar menggunakan habuk halus silika (fumed silica) dan natrium aluminat. A series of synthetic zeolites were successfully synthesized from sodium aluminosilicate solutions with varying Si concentration from 1 to 8 molar using fumed silica and sodium aluminate.

Zeolite X synthesis Prepared sodium silicate solution was introduced into the sodium aluminate solutionand the resulting mixture.
Search results for sodium aluminate at Sigma-Aldrich.
Desiliconization reaction in sodium aluminate solution by adding tricalcium hydroaluminate Jiongliang Yuana,b,⁎, Yi Zhangb a Department of Environmental Science.

Clare Grey - Stony Brook University

18/07/2006 · Synthesis of Zeolite from Fly Ash and their Use as Soil Amendment ..

One-Pot Synthesis of 1,2,3-Triazoles from Benzyl and Alkyl Halides, Sodium Azide and Alkynes in Water under Transition-Metal-Catalyst Free Reaction Conditions.

The most effective reaction for zeolite preparation was when sodalite was formed and the quantitative content of zeolite from X-ray diffractometry was 90 wt%, compared with 70 wt% for the Na-X and 75 wt% for the Na-P1.

02/01/2017 · An aluminogermanate possessing the zeolite JBW framework topology has been synthesized from a sodium- and rubidium-containing reagent mixture
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  • Synthesis of Metal-Organic Frameworks (MOFs): Routes …

    Synthesis and characterization of H-ZSM-5 zeolites and their catalytic performance in CH 3 Br conversion to aromatics

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    Today the synthesis of silver nanoparticles is very common due to their numerous applications in various fields

  • Regional Centre of Advanced Technologies and Materials

    ZSM-5 - Wikipedia

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Researche institute in Czech Republic focuses on nanotechnology

The use of zeolites and molecular sieves as catalysts for important organic reactions is reviewed. One emerging area of particular interest is the use of titanium-containing molecular sieves as partial oxidation catalysts and is chosen for further study.

In order to elucidate the relationships between the physicochemical properties of titanium-containing molecular sieves and their ability to act as partial oxidation catalysts, titanium-containing pure-silica ZSM-5 (TS-1) materials are synthesized using different methods. The activities of the titanium-containing catalysts for the oxidation of alkanes, alkenes, and phenol at temperatures below 100 [degrees]C using aqueous hydrogen peroxide H2O2 as the oxidant are reported. The relationships between the physicochemical and catalytic properties of these titanium silicates are discussed. The effects of added aluminum and sodium on the catalytic activity of TS-1 are described. The addition of sodium during the synthesis of TS-1 is detrimental to the catalytic activity while sodium incorporation into pre-formed TS-1 is not. The framework substitution of aluminum for silicon appears to decrease the amount of framework titanium.

The relationships between catalytic performance and physicochemical properties that are controlled through synthetic methods are further investigated using a series of titanium-containing molecular sieves. Titanium-containing pure-silica ZSM-5 (TS- 1), pure-silica ZSM-48 (Ti-ZSM-48) and zeolite beta (Ti-Al-beta) are synthesized and characterized by X-ray powder diffraction (XRD), elemental analysis, physical adsorption of N2, Fourier transform infrared (FT-IR), FT-Raman, and diffuse reflectance ultraviolet (DR-UV) spectroscopies. TS-1 is synthesized by five different methods. All materials are evaluated for their ability to oxidize 1-hexene and n-octane using aqueous H2O2 as the oxidant. The relationships between the physicochemical and catalytic properties of these titanium-containing zeolites are discussed. TS-1 samples synthesized at high pH are catalytically active and framework titanium is shown to be necessary for olefin epoxidation and alkane hydroxylation to occur. The existence of anatase in active TS-1 samples results in decreased hydrogen peroxide efficiencies in the epoxidation reaction. TS-1 produced at pH=7.4 and Ti-ZSM-48 each contain anatase and are not active. Ti-beta is found to contain framework titanium and be free of anatase. However, at the conditions used in this study these samples are not able to activate 1-hexene or n-octane.

In attempts to prepare large pore titanium-containing molecular sieves, postsynthetic incorporation of titanium in the borosilicate SSZ-33 and the direct synthesis of an aluminum-free titanium-containing zeolite Beta (Ti-Beta) are reported. These materials are characterized by XRD, FT-IR, FT-Raman, and DR-UV spectroscopies. The molecular sieves are shown to catalyze the epoxidation of various olefins using aqueous hydrogen peroxide as the oxidant. The physicochemical properties as found by the characterization methods are correlated to the catalytic data and the results compared to a high quality sample of TS-1. The modified SSZ-33 samples contain titanium primarily in the form of isolated tetrahedrally coordinated Ti atoms, although some extra-framework Ti is observed by Raman and DR-UV spectroscopies. Ti-Beta samples show no evidence of extra-framework titanium. For the epoxidation of cis-cyclooctene, the Ti-Beta catalysts give quantitative conversion to epoxide, and both the Ti-Beta and Ti-SSZ-33 catalysts are able to epoxidize substrates too large to be oxidized by TS-1.

Journal of Materials Science and Chemical Engineering - …

Zeolite X synthesis Prepared sodium silicate solution was introduced into the sodium aluminate.
A process for the production of sodium aluminate comprising drying an aluminate solution containing from 45 to 350 g/l of caustic Na 2 O with a molecular ratio.
Chemical, Material and Metallurgical Engineering IV: Synthesis and Optical Properties of Strontium Aluminate with Industrial Sodium Aluminate Solution.
One-part geopolymer mixes from geothermal silica and sodium aluminate Ailar Hajimohammadi*, John L.

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