Calcium base bentonite, Sodium base bentonite,

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Bentonite is a high swelling clay mineral whose name was derived from the location of the first commercial deposits mined at Fort Benton, Wyoming U. S. A. Mineralogically, bentonite mainly consists of montmorillonite in combination with various mineral impurities such as feldspars, calcite, silica, etc. Montmorillonite belongs to the smectite group of clays which also include similar behaving minerals such as beidellite, saponite and hectorite. Geologically bentonites are mainly of volcanic origin, The majority of commercial deposits were formed by the hydrolysis or metamorphism of volcanic rock or ash and are almostly found in everywhere in world. The structure of montmorillonite is fundamentally a three layer structure with an octahedral aluminium hydroxyl sheet sandwiched between two layers of silicon- oxygen tetrahedra. However, the aluminium atoms are partially replaced by the substitution of either magnesium or iron atoms, thereby creating a charge deficiency within the unit structure. This results in a small negative charge on the basal plane of silica tetrahedra which is balanced by absorption of exchangeable cations between adjacent platelets. In natural montmorillonite, these cations are usually calcium, sodium or magnesium according to the formations of bentonite. SPECIFICATION -Welldry activated clay (montmorillonite clay, bentonite clay), 100% pure clay desiccant without any calcium chloride. Typical chemical composition of desiccant: SiO2, 62.8%; Al2O3, 17.8%; Fe2O3, 7.7%; CaO, 3.4%; TiO2, 1.0%; Na2O, 0.3%; K2O, 0.2%; MgO, 5.3%; CaCO3, 0.5%; LOS, 0.9% Color of desiccant: White, grey, purple Appearance of desiccant: Granular Particle size of desiccant: 1-4mm (>95%) PH: 7.0+/-0.5 (0.1% solution) Moisture content: <2% (170 degree C) Stack density: 950+/-100g/liter The adsorption capacity of moisture: >=12.5% at 25 degree C and 20%RH The adsorption capacity of moisture: >=18.5% at 25 degree C and 40%RH Packaging: 25kg per PP bag with double inner PE plastic bag Production Storage: Cool dry location, 2 year shelf life

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Hu Bei Aging Chemcal .,Co Ltd

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