4A Zeolite

Zeolites are widely used as ion-exchange beds in domestic and commercial water purification, softening and other applications. In chemistry, zeolites are used to separate molecules. Zeolites are also widely used as catalysts and sorbents. Their well-defined pore structure and adjustable acidity make them highly active in a large variety of reactions. In the following some of the most considerable uses of zeolite in industry, domestic, medicine and agriculture have been mentioned. - Industry Petrochemical industry Synthetic zeolites are widely used as catalysts in the petrochemical industry, for instance in fluid catalytic cracking and hydrocracking. Nuclear industry Zeolites have uses in advanced reprocessing methods, where their micro-porous ability to capture some ions while allowing others to pass freely, allowing many fission products to be efficiently removed from nuclear waste. Biogas industry Zeolite substance is used in the biogas industry for long-term storage of energy at a density four times more than water. - Commercial and domestic Heating and refrigeration Zeolites can be used as solar thermal collectors and for adsorption refrigeration. Detergents The largest single use for zeolite is the global laundry detergent market. Construction Synthetic zeolites are used as an additive in the production process of warm mix asphalt concrete. - Medical Zeolite-based oxygen concentrator systems are widely used to produce medical-grade oxygen. The zeolite is used as a molecular sieve to create purified oxygen from air using its ability to trap impurities, in a process involving the adsorption of nitrogen, leaving highly purified oxygen and up to 5% argon. - Agriculture In agriculture, clinoptilolite (a naturally occurring zeolite) is used as a soil treatment. It provides a source of slowly released potassium.

This product is a synthetic zeolite 4A with an XRD pattern consistent with its standard one. Considering L.O.I, the purity of this product is 99.4%. It should be noted that the high L.O.I in this product arises from the high moisture absorption of zeolite. Zeolite due to its nano-scale porosities has some advantages such as reduced or inexistent mass transfer limitations, large external surface area and high surface charge.

Zeolites are highly crystalline hydrated aluminosilicates from the alkali metals and alkali earth metals groups. Their structural arrangement presents sockets and interconnected channels in which compensation ions, such as Na+, Ca2+, Mg2+, K+ and H2O, are present. This microporous structure enables zeolites to have a large surface area in relation to the external one. The zeolite structure allows the transference of substances between the intercrystalline spaces. Zeolites can be classified according to pore size into the following categories: extra-large pore zeolites (Θ≥ 9A˚), large pore zeolites (6˚A < Θ < 9A˚), medium pore zeolites (5˚A < Θ≤ 6A˚) and small pore zeolites (3˚A < Θ≤ 5A˚), depending on the access to the inner part using 8, 10 or 12 atoms oxygen rings, respectively. Due to the position of the cations in the zeolite structure, the effective pore diameter may vary according to the type of compensation cation. If the cation is sodium (Na+), the opening is 4A˚, and the material is referred to as 4A zeolite. Zeolites occur naturally but are also produced industrially on a large scale. 229 unique zeolite frameworks have been identified, and over 40 naturally occurring zeolite frameworks are known. Naturally occurring zeolites are rarely pure and are contaminated to varying degrees by other minerals, metals, quartz, or other zeolites. Synthetic zeolites are made from various materials, including industrial residues and clays. They are manufactured under carefully controlled physical and chemical conditions. By varying the synthesis conditions, one may obtain zeolites with different structural characteristics and chemical composition.