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Application of natural and synthetic zeolites in the oenological field
Food Research International, 2021Zeolites are crystalline hydrated aluminosilicates, of natural or synthetic origin, characterized by a microporous structure and high adsorption properties. They are employed as soil amendments and fertilizer carriers in agriculture, as catalysts, detergents, adsorbents and molecular sieves in many chemical processes, as well as in water and soil ...
Mirella Noviello +4 more
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Modification of Clinoptilolite by Synthetic Zeolite
Collection of Czechoslovak Chemical Communications, 1993The sol-gel process allows to modify clinoptilolite by the nucleation of synthetic zeolite. From the viewpoint of methanol conversion, the obtained high Al content nucleation-deposited zeolite decreases the catalytic activity of clinoptilolite. Therefore, it is necessary to optimize the selection of suitable synthetic zeolite as to its composition ...
Ľubomír Medvecký +2 more
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Infrared spectra of synthetic zeolites
Bulletin of the Academy of Sciences of the USSR Division of Chemical Science, 19721. The spectra of some synthetic zeolites (X, Y, A, erionite and mordenite) were studied and an assignment of the absorption bands was made. 2. The character of the IR spectrum is sensitive to the type of zeolite and the SiO2/Al2O3 ratio. Some new data were obtained, which testify to the existence of characteristic “chainlet” vibrations.
B. I. Shikunov +4 more
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The structure of synthetic zeolite G
Bulletin of the Academy of Sciences, USSR Division of Chemical Science, 1965The sodium ions in zeolite G are not located in the openings of the six-membered oxygen windows, but are shifted toward the center of the cubic octahedral cavities.
T. N. Shishakova, M. M. Dubinin
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Metal Immobilization in Soils Using Synthetic Zeolites
Journal of Environmental Quality, 2002ABSTRACTIn situ immobilization of heavy metals in contaminated soils is a technique to improve soil quality. Synthetic zeolites are potentially useful additives to bind heavy metals. This study selected the most effective zeolite in cadmium and zinc binding out of six synthetic zeolites (mordenite‐type, faujasite‐type, zeolite X, zeolite P, and two ...
Osté, L.A. +2 more
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Cation Sites in Synthetic Zeolites
Nature, 1965SYNTHETIC zeolites1, especially those with the same structure as natural faujasite, have recently come into prominence as industrial catalysts. Pickert, Rabo, Dempsey, Schomaker and references2 have convincingly demonstrated the importance of the positions of the exchangeable cations which compensate for the effective negative charge of aluminium atoms
T. I. BARRY, L. A. LAY
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Synthetic zeolites as a new tool for drug delivery
Journal of Biomedical Materials Research Part A, 2007AbstractSynthetic zeolites were studied in order to investigate their ability to encapsulate and to release drugs. In particular, a zeolite X and a zeolitic product obtained from a cocrystallization of zeolite X and zeolite A were examined. These materials were characterized by chemical analyses (ICP‐AES), X‐ray diffraction, nitrogen adsorption ...
RIMOLI, MARIA GRAZIA +6 more
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The safety of synthetic zeolites used in detergents
Archives of Toxicology, 2008Synthetic zeolites are replacing phosphates as builders in laundry detergents; workers and consumers may, therefore, increasingly be exposed to these materials and it is important to assess their safety. This article puts mechanistic, toxicological and exposure data into context for a safety assessment.
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Transformation of Hexoses on Natural and Synthetic Zeolites
Chemistry & Chemical Technology, 2023A number of zeolite catalysts based on synthetic powder zeolites and natural Ukrainian clinoptilolite as well as mordenite-clinoptilolite zeolite rocks were synthesized. The activity and selectivity of the prepared samples were compared in glucose and fructose dehydration into 5-hydroxymethylfurfural in a dimethyl sulfoxide environment.
Lyubov Patrylak +3 more
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