Separation and Recovery of Tetramethyl Ammonium Hydroxide with Zeolitic Adsorbents

Separation and Recovery of Tetramethyl Ammonium Hydroxide with Zeolitic Adsorbents
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沸石吸附剂分离回收四甲基氢氧化铵

DOI：
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发表时间：
2010
期刊：
影响因子：
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通讯作者：
K. Yoshizuka
K. Yoshizuka
中科院分区：
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文献类型：
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作者：
S. Nishihama;K. Takatori;K. Yoshizuka

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以几种沸石为吸附剂，研究了四甲基氢氧化铵(TMAH)的分离回收。以TMAH为结构导向剂制备的X型沸石，在所考察的吸附剂中具有最高的吸附能力，这与沸石的比表面积和孔体积相对应。沸石吸附剂对TMAH的吸附量随着水溶液pH值的升高而增加，表明吸附是通过阳离子交换机理进行的。最后进行层析操作，使用颗粒沸石吸附剂防止压降，实现了TMAH的定量吸附-洗脱过程。
Separation and recovery of tetramethyl ammonium hydroxide (TMAH) has been investigated, employing several zeolites as adsorbents. Zeolite X, prepared by using TMAH as a structure directing agent, possesses highest adsorption ability among the adsorbents investigated in the present work, which corresponds to the specific surface area and pore volume of the zeolite. The adsorption amount of TMAH with the zeolitic adsorbents increases with increase in pH value in the aqueous solution, indicating the adsorption progresses via cation exchange mechanism. The chromatographic operation is finally conducted, using granulated zeolitic adsorbents to prevent from the pressure-drop, and the quantitative adsorption-elution processing of TMAH can be achieved.