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Sulphonation of Aromatics using Silica Sulphuric acid/ NaHSO4 as a Novel Heterogeneous System at Ambient Temperature

Keywords: Silca sulphuric acid/ NaHSO4 , Wet SiO2 , Heterogeneous catalyst , Aromatic Sulphonic acids

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Using Silca sulphuric acid/ NaHSO4 and wet SiO2 as novel heterogeneous catalyst, the aromatic sulphonic acids were synthesized in good yields. The reaction was carried out at room temperature and involved simple workup. The possibility of reuse of the catalyst was also investigated. The results indicated that the aromatic sulphonation procedure could be carried out under mild conditions and the recycling of the catalyst is possible thus making the whole process more eco-friendly.


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