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Light calcium carbonate

Country/Region china
Company Hebei Jiayong Minerals Co., LTD.
Categories Polyacrylic Acid Sodium Salt
Telephone +86-311-69015263
ICP License Issued by the Chinese Ministry
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    Light calcium carbonate

    Light calcium carbonate
    2015-8-18 17:14:12:189

    Light calcium carbonate

    PCC Light (Calcium Carbonate Precipitated) is also known as the precipitation of calcium carbonate (Calcium, referred to as Carbonate). Light calcium carbonate is prepared by chemical processing method. Because of its settling volume (2.4-2.8mL/g), it is known as light calcium carbonate (), which is larger than that of heavy calcium carbonate (1.1-1.9mL/g) produced by mechanical method.

    Brief introduction

    React with calcium carbonate and all of the acid, water is generated and the corresponding calcium salts such as calcium chloride CaCl2, emit carbon dioxide at the same time; under the normal temperature (25 C), calcium carbonate in water the concentration product for 8. 7 x 1029, solubility is 0.0014, calcium carbonate in an aqueous solution of pH value of 9.5 to 10.2, air saturated calcium carbonate in an aqueous solution of the pH value is ~ 8.0 8.6. Calcium carbonate, non-toxic, no odor, no stimulation, usually white, relative density of 2.7 to 2.9.

    The shape of the light calcium carbonate according to the different calcium carbonate grain shape, light calcium carbonate for spindle, cubic shape, needle shaped, chain shaped, spherical, shape and four prism shaped calcium carbonate, these different crystal forms of calcium carbonate can be obtained by controlling the reaction conditions of. Light calcium carbonate by its original average particle size (d) is divided into: particulate calcium carbonate (5 m), calcium carbonate (1 ~ 5 m), calcium carbonate (0.1 ~ 1 m), ultra-fine calcium carbonate (0.02 ~ 0.1 M), ultra fine calcium carbonate (0.02 M).

    Is the limestone and other raw materials segment burned to produce lime (main component of calcium oxide and carbon dioxide, add water, lime generation to digest milk of lime (the main composition is Ca (OH) 2), and then pass into the carbon dioxide carbonation of lime milk to produce calcium carbonate precipitation, finally by dehydration, drying and crushing the system, or to use sodium carbonate and calcium chloride to precipitate calcium carbonate metathesis reaction, then by dehydration, drying and crushing the system.

    The chemical formula of calcium carbonate is CaCO3. The settling volume of light calcium carbonate: 2.5ml/g, the specific surface area is about 5m2/g. Light calcium carbonate particles are fine, the surface is rough, the specific surface area is large, so the oil absorption value is higher, which is about 60 ~ 90ml/100g.

    Chemical information

    Basic information

    Calcium carbonate, PT

    Chinese alias: light calcium carbonate, calcium carbonate, calcium carbonate, calcium carbonate sedimentation

    English Name: carbonate Calcium

    English alias: Precipitated chalk, calcium carbonate, calcium carbonate, calcium carbonate, calcium carbonate sedimentation

    Grade: PT

    CAS number: 471-34-1

    Molecular formula: CaCO3

    Molecular weight: 100.09


    White powder or colorless crystals. No smell. Tasteless. 825 for calcium oxide and carbon dioxide. Dissolve in dilute acid and release carbon dioxide, insoluble in alcohol. There are two kinds of crystallization, is an orthorhombic crystal aragonite, a rhombohedral calcite crystal is six. Calcite, a stimulating.

    A regular particle shape, which can be regarded as monodisperse powders, but can be a variety of shapes, such as the spindle, cubic shape, needle shaped, chain shaped, spherical, shape and four prism shaped. These different shapes of calcium carbonate can be prepared by controlling the reaction conditions.

    B particle size distribution is narrow.

    C particle size is small, the average particle size is generally 1-3 M. To determine the light calcium carbonate, the average particle diameter, available triaxial particle size in the short axis of the particle size as size, and then take in particle size as the average particle size. In addition to the description, the average particle size, that is, the average particle size of the short axis.

    Storage transportation

    Density: 2.711

    Melting point: 1339

    Purpose description

    Verification and determination of halogen organic combination reaction, and ammonium chloride with decomposition of silicate prepared calcium chloride solution to standardized soap and water analysis, verification of phosphorus. Manufacturing optical neodymium glass.

    Danger description

    Danger signs: Xi

    Dangerous code: R37/38-R41

    Safety note: S26-S36/37/39

    Component structure


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