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Study of the catalytic activity of calcined hydrotalcites for Friedel–Crafts reactions

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Abstract

The structure of hydrotalcite (HT)-like compounds, also know as layered double hydroxides and anionic clays, can be described as containing brucite-like layers. In this study, we aim to compare the following different types of catalyst: NiMgAl-HT, CoMgAl-HT, NiMgLa-HT, and CoMgLa-HT. These samples were prepared by coprecipitation at constant basic pH (pH 11). The obtained solids were calcined at 450 °C. Hydrotalcite catalysts were characterized by atomic absorption spectroscopy (AAS), X-ray powder diffraction (XRD), Fourier-transform infrared (FTIR) analysis, and the Brunauer–Emmett–Teller (BET) method. The data obtained from chemical analysis of the calcined catalysts confirmed that the n (M2+/M3+) ratio is close to the intended value of 2. The XRD patterns confirmed the hydrotalcite structure. Room-temperature FTIR spectra were recorded in the range from 4,000 to 400 cm−1 on a PerkinElmer spectrometer. These catalysts were tested for the benzylation of by benzyl chloride reaction. Generally, the studies of activity showed that the catalytic performance varies as follows: NiMgAl-HT > CoMgAl-HT > NiMgLa-HT > CoMgLa-HT > MgAl-HT ≈ MgLa-HT.

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Authors and Affiliations

  1. Laboratoire de Chimie du Gaz Naturel, Faculté de Chimie, USTHB, BP 32, El-Alia, 16111, Bab-Ezzouar, Algiers, Algeria

    Z. Abdelssadek, A. Saadi, O. Cherifi & D. Halliche

  2. Centre de Recherches Scientifiques et Techniques en Analyses Physico-Chimiques (CRAPC), BP 248, 16000, Algiers, Algeria

    K. Bachari

Authors
  1. Z. Abdelssadek
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  2. K. Bachari
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  3. A. Saadi
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  4. O. Cherifi
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  5. D. Halliche
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Correspondence to Z. Abdelssadek.

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Abdelssadek, Z., Bachari, K., Saadi, A. et al. Study of the catalytic activity of calcined hydrotalcites for Friedel–Crafts reactions. Res Chem Intermed 41, 1757–1764 (2015). https://doi.org/10.1007/s11164-013-1309-7

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  • DOI: https://doi.org/10.1007/s11164-013-1309-7

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