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1)  Acidity of zeolite
沸石酸性
2)  acidic zeolite
酸性沸石分子筛
1.
Knoevenagel condensation of carbonyl substrates with the compounds containing active methylene group to olefin and water was performed successfully over acidic zeolite HY, and a series of α,β unsaturated compounds were synthesized in satisfactory yield.
在高硅 /铝比的酸性沸石分子筛HY上实现了Knoevenagel缩合反应 。
3)  acidity and basicity of zeolites
沸石的酸碱性
4)  modified zeolite
改性沸石
1.
Removing ammonia nitrogen from sewage by modified zeolite;
改性沸石处理含氨氮废水
2.
Experiment on polluted scenic reclaimed-water by modified zeolite and biofilm system;
改性沸石生物滤池处理中水景观污染水体实验研究
3.
Study of Property of PP/Modified Zeolite Composite;
PP/单甘酯改性沸石复合材料的研究
5)  zeolite modification
沸石改性
6)  basic zeolites
碱性沸石
1.
Microwave irradiation and impregnation were employed to prepare basic zeolites and other porous materials, and the activities of these samples were examined in the direct synthesis of dimethyl carbonate (DMC) from CO_2 and methanol.
本文探讨了固体碱的制备和预处理等因素对于CO_2~-甲醇法合成碳酸二甲酯(DMC)的影响,发现微波法所制碱性沸石等多孔材料的反应活性高于浸渍法所制样品。
补充资料:4A沸石
分子式:
CAS号:

性质:又称Na12[(A1O2)12、(SiO2)12]27H2O  又称4A分子筛。白色固体颗粒。呈网络状结构,内含均匀小孔,孔径0.42nm,比表面积约为600m2/R,不溶于水和有机溶剂,能溶解于强碱和强酸。加热超过800℃时,重新结晶形成白硅石状的结构。有吸附水分,液体、气体及不饱和的有机物质。对钙离子有交换能力,理论交换能力为352CaCO3mg/g,一般为290~320mgCaCO3/g,白度≥95%,pH值10~11.5,表观密度0.3~0.5g/cm3,平均粒径为2μm,粒度分布≤4μm占85%以上。用作无磷洗涤剂的助剂,代替三聚磷酸钠;在石油和其他工业用作气体和液体的干燥、脱水净化等,也用作催化剂和软水剂。

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