Studies on Synthesis of para-Isopropylphenol over the P-HZSM-5 Catalyst

Abstract

Abstract: Alkylation of phenol with isopropanol to para-isopropylphenol(p-IPP) over P-HZSM-5 catalyst has been studied. The influence of phosphorus modification on catalytic performance of HZSM-5 has been investigated. The acidic site density and acid types were determined by means of NH₃-TPD and Pyr-IR. The selectivity of p-IPP increased to 95% while the conversion of phenol and the acidic site density decreased on the HZSM-5 after modified with NH₄H₂PO_4.In the preparation of P-HZSM-5, it appeared that there was an interaction between phosphorus and HZSM-5 zeolite, which resulted in framework dealumination on HZSM-5, and calcination influenced both activity and p-IPP selectivity. The selectivity of P-HZSM-5 reached the highest when the support and the catalyst were calcined at 973 Kand 823 K, respectively.

Key words: para-Isopropylphenol, Alkylation of phenol, Modification, HZSM-5

CLC Number:

O643.1

TrendMD:

ZHU Rui-Zhi, GUO Chang-Wen, TANG Xiang-Hai, PAN Lü-Rang . Studies on Synthesis of para-Isopropylphenol over the P-HZSM-5 Catalyst[J]. Chem. J. Chinese Universities, 1999, 20(10): 1615.

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Studies on Synthesis of para-Isopropylphenol over the P-HZSM-5 Catalyst

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