| 摘要 |
<p>PURPOSE: To obtain a safe air cleaning agent removing smoke, odor, etc., having dehumidifying effect, also having effect retentivity over a long period of time and not requiring a large space by using fine powder of natural sedimentary rock belonging to feldspathic sandstone or feldspathic wacke as a major ingredient. CONSTITUTION: Fine powder of natural sedimentary rock belonging to feldspathic sandstone or feldspathic wacke is used as the major ingredient of an air cleaning agent. An air cleaning agent contg. natural sedimentary rock and having a compsn. contg. 64.1% SiO2 , 20.2% Al2 O3 , 7.46% K2 O, 0.68% CaO, 0.73% MgO, 0.12% MnO, 0.75% TiO2 , 7.46% Fe2 O3 and 0.09% Cr2 O3 when the constituents are expressed in terms of oxides produces an excellent effect. The natural sedimentary rock may be used as a single material or a worked product in the form of rock itself, fine powder, small granules, ceramics, tablets, an emulsion, jelley or fibers.</p> |
