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在无粘结剂疏水硅沸石S -Ⅰ吸附剂上研究混合二氯苯液相吸附平衡。对二氯苯对邻二氯苯的选择吸附分离系数为 12 3。筛选出五种与吸附剂相匹配的脱附剂 :苯、甲苯、乙苯、一氯苯、对二乙苯。二氯苯异构体与脱附剂单组份液相吸附等温线均呈典型的Langmuir吸附 ,并测得饱和吸附量。对混合二氯苯的液相竞争吸附行为进行了考察。S -Ⅰ吸附剂不吸附间二氯苯 ,对二氯苯对邻二甲苯的高选择性与吸附剂的结构特征有关。S -Ⅰ吸附剂在液相吸附分离使用中不需控制水含量 ,且可活化再生。
The adsorption equilibrium of mixed dichlorobenzene liquid phase was studied on a binderless hydrophobic silicalite S-I adsorbent. The selective adsorption separation of p-dichlorobenzene to o-dichlorobenzene was 12 3. Five kinds of desorbent matched with adsorbent were selected: benzene, toluene, ethylbenzene, monochlorobenzene and p-diethylbenzene. The liquid phase adsorption isotherms of dichlorobenzene isomers and desorbent were all typical Langmuir adsorption, and the saturated adsorption capacity was measured. The liquid phase competitive adsorption of mixed dichlorobenzene was investigated. S-Ⅰ adsorbent does not adsorb m-dichlorobenzene, p-dichlorobenzene o-xylene selectivity and the structure of the adsorbent characteristics. S-Ⅰ adsorbent in the liquid adsorption separation without the need to control the water content, and can be activated regeneration.