Diatomite Containing Silver Inorganic Membrane Materials Preparation And Application Of Research

Inorganic membrane is employed in many fields because of its some advantages such as excellent thermal stability, good chemical stability , regular aperture, high anti-pressure and well separability etc. At present, the inorganic membrane whose main component is aluminum oxide is used widely in separate field. Though this membrane has high intensity, its some disadvantages: pockety aperture and different aperture which result from dissimilar technical conditions have a negative influence on its using range. In recent years, some achievements in diatomite inorganic membrane have been acquired through researchers' study in domestic and oversea. However, it is difficult to find a ideal way to prepare this kind of membrane.In order to obtain pockety aperture, this paper prepares inorganic membrane with choosing diatomite of TengChong. The quality of this choosing diatomite is alterd by adding argentic oxide to improve its sorption capacity of ammonia and separate effect of ammonia water. Diatomite is choosed through the experiments of ultrasonic. The orthogonal experiments is employed to determine the best technical conditions. The following is the best conditions: the content of raw material is15%, the acidity is5.25%, the time of ultrasonic vibration is 90 minutes. The all-around chemical analysis is done also. Furthermore, the choosing diatomite is analysized with SEM and X-ray diffraction. The results show that the choosed diatomite has clear cavity and its component is mainly non-crystal SiO2,as well as a small quantity of crystal SiO2. In order to improve its sorption capacity of ammonia, Ag2O is prepared at nanometer-level and it is used to modify diatomite. . The result of SEM analysis show that the diameter of prepared Ag2O has reached nanometer-level.After the prepared Ag2O modifies the diatomite, the X-ray diffraction figures display that when the sintering temperature is beyond 300 C,the Ag2O will translate into Ag which combine with diatomite. This material is used as bactericide of AIV. The result shows that this material can extinguish AIV. we employ the modified diatomite as the membrane material which impregnate ceramic membrane support to form modifying diatomite membrane. During the process of making membrane, the conclusion is drown: when the amount of adhesive is added, the number of the big poreof membrane decreases while the number of small pore of membrane increases; when the temperature of sintering is added, the number of big pore of membrane increases while the number of small pore of membrane decreases. The primary experiments of ammonia water separation with this diatomite membrane are performed. The results indicate that the content of ammonia in water is decreased 75% though the membrane separation. Compare with other methods of ammonia water separation, this kind of separation has some advantages such as energy consuming and operating expenditure is low.