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Ion-Exchange of Mordenite-Type Zeolite with Mg exp 2+ and La exp 3+

机译：丝光沸石型沸石与mg exp 2+和La exp 3+的离子交换

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Special techniques were tried for ion-exchanging Mg exp 2+ and La exp 3+ into mordenite, which is an acid-stable zeolite of possible catalytic value to the coal industry. Electron microprobe analysis showed that ion-exchange occurred only along the main channels of the 100 mu m long needles. Complete exchange was not achieved, and exchange was always higher at the ends of the needles. The highest content of Mg exp 2+ is 3.7 atoms per unit cell (with 0.2 Na and 1.0 K residual), and the highest content of La exp 3+ is 1.7 atoms per unit cell (with 1.7 Na and 0.1 K residual). Higher ion-exchange should be achievable for smaller crystals, such as are commonly made synthetically, but such crystals would be too small for routine X-ray structure analysis. Detailed structural data are given for an Mg exp 2+ -exchanged crystal, but interpretation of the cation populations is equivocal. Suggestions are made for further work using (a) X-ray powder techniques and (b) X-ray single-crystal techniques based on a rotating-anode X-ray generator. (ERA citation 03:035736)

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Smith, J. V.;
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年度 1977
页码 1-14
总页数 14
原文格式 PDF
正文语种 eng
中图分类工业技术;
关键词
Coal industry ; Lanthanum ; Magnesium ; Mordenite ; Catalysts ; Chemisorption ; Crystal structure ; Ion exchange ; Sorptive properties;

机译：煤炭工业;镧;镁;丝光沸石;催化剂;化学吸附;晶体结构;离子交换;吸附性能;

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Ion-Exchange of Mordenite-Type Zeolite with Mg exp 2+ and La exp 3+

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