| Owing to energy crisis and increasing expending scale of industry, the government gives more strict standards on saving energy, protecting environment, improving habituating conditions and so on. The research was done under the circumstance of promoting energy saving, and the preparing conditions of several high-efficient zeolites using ion-exchanging method were studied.With increasing scale of industry, it is very important and will bring enormous economic profits to lower down producing cost and develop the process of adsorption-and-desorption that saves more energy resources. The adsorbent properties influence directly the performances of PSA mechanics. So, it is the key point in developing PSA air-separation technique to explore high-efficient adsorbents. Li-X and Li-LSX will promote the further development of PSA technique. The 1/4 of energy cost in our country is due to the architection field and its energy saving is associated with many other fields. The structure of zeolite adsorbent plays a key role in its adsorption performance. Baking temperature, the concentration of ion-exchanging solution, ion-exchanging time and activating temperature were also studied in our research, and high-efficient zeolite was prepared in the optimal conditions obtained by the above experiments. It has been proved that the improvement of heat-holding properties for building structures, espectical for windows, is the best and most efficient way to prohibit heat losing and hollow glass plays key roles for these purposes. 3A zeolite constitutes great part of artechitecion materials (hollow glass), that is to say, it will lengthen the using life of hollow glass to improve the water-adsorption properties of 3A zeolite. Due to its sole adsorption property to water, it is also necessary as the water adsorbent in water-containing alkenes and esterification. 1. Preparation of zeolite 3AOptimal conditions of zeolite 3 A preparation were studied by changing the concentration of exchanging solution, exchanging time and so on. Zeolite A can be named as zeolite 3A with K~+ containing over 40%. With the increase of K~+ containing, its basic properties change differently, of which static water adsorption and nitrogen adsorption decreases and follow the polygonal line, respectively. The adsorption of zeolite is mainly determined by its pore capacity, and the decreasing of pore capacity due to the increasing of K~+ containing would decrease the adsorption of zeolite. The change of static water adsorption is correspond to that of pore capacity, while the static nitrogen adsorption isn't, this is may due to the co-effect of the change of pore capacity and electric field in the pores. With the increase of K~+ containing in zeolite KA, the electric field in the pore strengthens and is more capable to adsorb nitrogen molecular. Considering all the factors, it was found that zeolite 3A obtained by ion-exchanging with KC1 solution of 0.06mol/L for three times has the best properties for making hollow glass and other drying processes. 2. Preparation of Li-X and Li-LSXNowsdays, zeolite Li-X and Li-LSX are two adsorbents used in PSA process which have better effect of separating nitrogen from oxygen, and exhibit promising future in industry. Though zeolite adsorbent containing Li is more expensive than others, its cost could be lower down by means of saving energy resources in high effective industrial process. Thus, the research on the adsorption properties and their improvement of zeolite Li-X and Li-LSX are very important. Now, the research is focus on the preparing conditions of modified 13X and LSX obtained by Li-exchanging method, especially shaped LSX. During the preparation, calcining temperature for molding of shaped zeolite effects the adsorption properties of final zeolite Li-X and Li-LSX. The calcining temperature of Li-X and Li-LSX were chose at 650°C and 550°C, respectively. The effect of activating temperature on sample properties is much less than that of activating circumstances (vacuum conditions) and is different on zeolite X and LSX. From 400°C to 500°C, the nitrogen adsorption of zeolite X doesn't change too much, while that of zeolite LSX decreases remarkably. Therefore, the activating temperature of zeolite LSX would not be higher than 400°C.With the nitrogen adsorption as the measuring standard, the optimal preparing conditions of which the concentration of ion-exchanging solution, exchanging time and static exchanging time are 4mol/L, 5 and 24 hour, respectively were obtained by orthogonal analysis for Li-LSX with the solid/liquid of 1:25. However, considering factors such as product properties and producing efficiency, zeolite Li-LSX with good properties can be obtained on the condition of which the solid/liquid, the concentration of ion-exchanging solution, exchanging time , static exchanging time, baking temperature and vacuum temperature are 1:25, 2mol/L, 3times, 6 hour, 550°C and 340°C, respectively.
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