| 摘要 |
PURPOSE:To enhance adsorbing capacity and chemical resistance, by precipitating a raw material consisting of a chlorine compound of Ti and a chlorine compound of Zr as hydroxide according to an NH3 method and baking the formed precipitate at 350-450 deg.C to form an adsorbent. CONSTITUTION:NH3 is added to a raw material consisting of a chlorine compound of Ti and a chlorine compound of Zr to form a white precipitate composed of Ti(OH)4 and Zr(OH)4. This precipitate is repeatedly washed by decantation until Cl<-> can not be detected in the supernatant liquid to be perfectly washed while the washed precipitate is filtered and dehydrated under suction by a large-scale suction filter. The filter cake is dried at 100-110 deg.C and subsequently baked at 350-450 deg.C to prepare an adsorbent wherein a mol. ratio of ZrO2/TiO2 is 1.0+ or -0.5. This adsorbent has adsorbing capacity as high as about 10 times that of SiO2 being a conventional adsorbent, high solubility resistance and chemical resistance.
|
