Sulfonic acid groups anchored to the surface of mesoporous MCM-41 silica have been identified with S K-edge XANES spectra and the material is an efficient catalyst for the liquid phase condensation of phenol with acetone to form Bis- phenol-A with high selectivity.
Sulfonic acid functionalized mesoporous MCM-41 silica as a convenient catalyst for Bisphenol-A synthesis
D. Das, J. Lee and S. Cheng, Chem. Commun., 2001, 2178 DOI: 10.1039/B107155F
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