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    https://en.wikipedia.org › wiki › Molecular_sieve

    Molecular sieve - Wikipedia

    Sieving process

    The diameters of the pores that comprise molecular sieves are similar in size to small molecules. Large … 展开

    Applications

    Some molecular sieves are used in size-exclusion chromatography, a separation technique that sorts molecules based on their size.
    Another important use is as a desiccant. They are often ut… 展开

    Regeneration

    Methods for regeneration of molecular sieves include pressure change (as in oxygen concentrators), heating and purging with a carrier gas (as when used in ethanol dehydration), or heating under high vacuum. Regene… 展开

    Molecular Sieve - Bulk Raw Material - WiseSorbent® Technology
    wisesorbent.com
    3A

    • Approximate chemical formula: ((K2O)2⁄3 (Na2O)1⁄3) • Al2O3• 2 SiO2 • 9/2 H2O
    • Silica-alumina ratio: SiO2/ Al2O3≈2
    3A molecular sieves are produced by cation exchange of … 展开

    4A

    • Chemical formula: Na2O•Al2O3•2SiO2•9/2H2O
    • Silicon-aluminium ratio: 1:1 (SiO2/ Al2O3≈2)
    For the production of 4A sieve, typically aqueous solution… 展开

    Uses

    The main use of zeolitic molecular sieves is in laundry detergents. In 2001, an estimated 1200 kilotons of zeolite A were produced for this purpose, which entails water softening.
    4A molecular sie… 展开

    Morphology of molecular sieves

    Molecular sieves are available in diverse shape and sizes. Spherical beads have advantage over other shapes as they offer lower pressure drop and are mechanically robust. 展开

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