... ceramic structured packings is widely used as the chemical packing of desulfurizing, washing, debenzolization, naphthalene- ... cleaning, rectification, absorption, drying tower in chemical-processing coal and fine chemicals industries, such as ... 4.8-5.5Chemical composition Chemical composition SiO2Al2O3K2ONO2CaOMgOFe2O3Ignition loss%Acid resitance%Alkali resistance%NAMECeramics75.4818. ...