Journal of Inorganic Materials ›› 2016, Vol. 31 ›› Issue (7): 694-698.DOI: 10.15541/jim20150591

• Orginal Article • Previous Articles     Next Articles

Magnetic MCM-41 for TMAOH Recovery from RT Base Wastewater

LI Yu, MI Qin, XUE Ze-Hui   

  1. (School of Chemical Engineering and Environment, North University of China, Taiyuan 030051, China)
  • Received:2015-11-30 Revised:2015-12-29 Published:2016-07-20 Online:2016-06-22
  • Supported by:
    The Major Program of Science and Technology of Shanxi Province (20111101013)

Abstract:

RT base wastewater has high colority, complex components and troubles to recover the TMAOH catalyst in the process of RT base production by nitrobenzene method. Selectively adsorption and separation of by-product from RT base wastewater with magnetic MCM-41 adsorbent was proposed to recover the TMAOH. The magnetic MCM-41 samples prepared were characterized by transmission electron microscopy (TEM), scanning electron microscope (SEM), X-ray diffraction (XRD), N2 adsorption-desorption vibrating sample magnetometer (VSM). The results showed that the samples had an obvious core-shell structure with an average size of about 200~300 nm in diameter. The N2 adsorption-desorption results showed that the magnetic MCM-41 exhibited micro-mesoporous structure with specific area of 655 m2/g and pore size distribution of 0.5-4 nm. The as-prepared magnetic MCM-41 displayed typical super paramagnetic property due to the inside component of NiFe2O4. The adsorption experiments showed that magnetic MCM-41 selectively adsorbed phenazine, azobenzene and aniline from RT base wastewater. TMAOH aqueous solution could be reused after 5 times adsorptive separation. The synthesized magnetic MCM-41 exhibits high adsorption efficiency and potential applications for the recover for TMAOH catalyst from RT base wastewater with the help of magnetic separation.

Key words: RT base wastewater, magnetic MCM-41, TMAOH, adsorption and separation

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