微波辐射作用下La^(3+),Co^(2+),Cu^(2+)和Zn^(2+)与Y沸石的离子交换  

The Ion Exchange of La^(3+),Zn^(2+),Cu^(2+) and Co^(2+) with Zeolite Y Using Microwave Radiation

作　　者：谷亨达[1] 石照信[1] 仇兴华[1] 刘东宾[1] 樊丽辉[1] 孙剑飞[1] 

机构地区：[1]沈阳化工学院,辽宁沈阳110142

出　　处：《辽宁化工》2007年第5期309-312,共4页Liaoning Chemical Industry

摘　　要：采用微波辐射法制备了La3+/Y、Co2+/Y、Cu2+/Y和Zn2+/Y离子交换型沸石催化剂。通过考察交换原液浓度、加热时间、微波功率等因素对交换度的影响,得出交换反应的适宜工艺条件为:交换原液浓度0.12 mol.L-1(La3+)、0.06 mol.L-1(Co2+)、0.08 mol.L-1(Cu2+)和0.10 mol.L-1(Zn2+),加热时间6 min(Co2+和Zn2+)、12 min(La3+和Cu2+),微波辐射功率520 W(La3+,Co2+,Cu2+和Zn2+)。La3+,Co2+,Cu2+和Zn2+与Y沸石的一次交换度分别为80.8%(La3+)、69.6%(Zn2+)、67.5%(Cu2+)和63.8%(Co2+)。对比实验结果表明,在相同工艺条件下,微波辐射加热法所需时间仅为传统加热法的1/40~1/80。XRD结果表明,微波辐射对沸石晶体结构无破坏作用。采用“二交二焙”法可使La3+与Y沸石的交换度由80.8%提高到91.6%。It was investigated that the cation exchange of La^3＋ , Zn^2＋ , Cu^2＋ and Co^2＋ with zeolites Y under the heating of microwave radiation and the effects of cation concentration, heating, microwave power on the exchange degrees. The proper operation conditions were as follows; the original concentration were 0. 12 mol · L^-1 （La^3＋ ）, 0.06 mol · L^-1 （Co^2＋）, 0.08 mol · L^-1 （Cu^2＋） and 0. 10 mol · L^-1 （Zn^2＋ ）; heating time were 6 min （Co^2＋ ,Zn^2＋ ）, 12 min（La^3＋, Cu^2＋ ） ; microwave power 520 W（La^3＋ ,Co^2＋ ,Cu^2＋ 和 Zn^2＋ ）. The results showed that the exchange degrees of the cation in zeolites can reach 80.8 % （ La^3＋ ） ,69.6 % （ Zn^2＋ ） ,67.5 % （Cu^2＋ ） and 63.8 % （Co^2＋ ） by one-step exchanging, respectively. Comparing with conventional heating method, the heating time using microwave radiation technique was 1/40 1/80 of the former. Microwave radiation did not destroy the crystal structure of zeolite Y. The exchange degree can enhance to 91.6 %（La^3＋） by using the ＂2-exchange-2-calcine＂ method.

关 键 词：微波辐射 沸石 离子交换 

分 类 号：O643.38[理学—物理化学]