Results indicated that organic bentonite could be prepared firstly by Na-modification and then by quaternary ammonium treatment.
研究表明，采用天然钙基膨润土通过钠化提纯、季铵盐有机改性的方法，可以制备出性能优良的有机膨润土。
Then a comparatively reasonable Na modification mechanism was proposed.
最后推理得出比较合理的钠变质的机制。
Then a comparatively reasonable Na modification mechanism was proposed.
最后推理得出比较合理的钠变质的机制。
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