高等学校化学学报 ›› 1999, Vol. 20 ›› Issue (10): 1615.

• 论文 • 上一篇    下一篇

P-HZSM-5催化剂上合成对异丙基苯酚的研究

朱瑞芝, 郭昌文, 唐祥海, 潘履让   

  1. 南开大学化学系, 天津 300071
  • 收稿日期:1998-12-16 出版日期:1999-10-24 发布日期:1999-10-24
  • 通讯作者: 潘履让
  • 作者简介:朱瑞芝,女,57岁,高级工程师.
  • 基金资助:

    国家自然科学基金(批准号:29873024)资助课题

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

ZHU Rui-Zhi, GUO Chang-Wen, TANG Xiang-Hai, PAN Lü-Rang   

  1. Department of Chemistry, Nankai University, Tianjin 300071, China
  • Received:1998-12-16 Online:1999-10-24 Published:1999-10-24

摘要: 研究了在P-HZSM-5上苯酚与异丙醇烷基化合成对异丙基苯酚(p-IPP)的反应,考察了磷含量对催化反应性能的影响,用NH3-TPD和Pyr-IR表征了P-HZSM-5的表面酸性质.结果表明,磷改性HZSM-5可提高p-IPP选择性(达95%),而降低了苯酚的转化率,并导致酸量减少和酸强度减弱.磷与分子筛的相互作用引起了分子筛脱铝.焙烧温度对活性和选择性均有影响.分子筛在973K、P-HZSM-5在823K焙烧时,p-IPP选择性最高.

关键词: 对-异丙基苯酚, 苯酚烷基化, 改性, HZSM-5

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 NH4H2PO4.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

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