Chinese Journal of Applied Chemistry ›› 2019, Vol. 36 ›› Issue (11): 1294-1300.DOI: 10.11944/j.issn.1000-0518.2019.11.190081

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CTAB-P123-Assisted Synthesis of Orderly Mesoporous KF/Al-Ce-SBA-15 Solid Base and Its Catalytic Application

LIU Ning(),LIU Shuilin,WU Suyun,TANG Xinde,WU Zhi,LI Aiyang()   

  1. Department of Materials and Chemical Engineering,New Building Materials Academy,Hunan Institute of Technology,Hengyang,Hunan 421002,China
  • Received:2019-04-01 Accepted:2019-07-09 Published:2019-11-01 Online:2019-11-05
  • Contact: LIU Ning
  • Supported by:
    Supported by the National Natural Science Foundation of China(No. 51802093), the Hunan Provincial Natural Science Foundation of China(No.2019JJ60026, No.2019JJ50107), the Foundation of Hunan Educational Committee(No.18B465), the Key Laboratory of Functional Organometallic Materials of Hengyang Normal University(No.GN18K01), and the Characteristic Application Discipline of Material Science and Engineering in Hunan(No.Xiang-Jiao-Tong[2018]369)

Abstract:

The orderly mesoporous KF/Al-Ce-SBA-15(KF/ACS) solid bases were successfully prepared with cetyltrimethylammonium bromide(CATB)- poly(ethylene oxide)/poly(propylene oxide)/poly(ethylene oxide) triblock copolymer (P123) as the dual-template and KF as the modifier in two steps. The structure and property of the obtained catalysts were characterized by X-ray diffraction (XRD), N2 adsorption-desorption, transmission electron microscopy (TEM), scanning electron microscopy (SEM) and CO2-temperature programmed desorption (TPD). The results illustrated that the KF/ACS catalysts possess both an ordered mesostructure and superbasicity when the introduced Al/Ce atomic ratio is 0.12 and the loading amounts(mass fraction) of KF is 10%. The catalytic activity of the prepared materials was evaluated in the ring-opening reaction of propylene oxide (PO) with methanol. It shows excellent catalytic performance exhibiting 92.0% yield of propylene glycol monomethyl ether (PM) and 96.1% selectivity to 1-methoxy-2-propanol (PPM) and the by-products of dipropylene glycol methyl ether was effectively inhibited.

Key words: cetyltrimethylammonium bromide, triblock copolymer P123, mesoporous solid bases, SBA-15, Al-Ce mixed oxides