高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (S1): 44.

• Organic Synthesis Chemistry • 上一篇    下一篇

Preparation of 2,6-Diisopropylnaphthalene(2,6-DIPN) by the Shape-Selective Isopropylation of Naphthalene over Synthetic Mordenite

TIAN Zheng-Hua, WANG Wen-Han, ZHANG Xiao-Hui, SONG Ren-Feng   

  1. Dept. of AppL Chem., Anshan Inst. of Iron & Steel Tech., Anshan 114002
  • 出版日期:1998-12-31 发布日期:1998-12-31
  • 基金资助:
    Supported by the Refundable Research Fund of Ministry of Metallurgical Industry and the Natural Science Fountation of Liaoning Province

Preparation of 2,6-Diisopropylnaphthalene(2,6-DIPN) by the Shape-Selective Isopropylation of Naphthalene over Synthetic Mordenite

TIAN Zheng-Hua, WANG Wen-Han, ZHANG Xiao-Hui, SONG Ren-Feng   

  1. Dept. of AppL Chem., Anshan Inst. of Iron & Steel Tech., Anshan 114002
  • Online:1998-12-31 Published:1998-12-31
  • Supported by:
    Supported by the Refundable Research Fund of Ministry of Metallurgical Industry and the Natural Science Fountation of Liaoning Province

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摘要： 2,6-DIPN is a precursor of 2,6-naphthalene dicarboxylic acid (2,6-NDA) which is an important monomer for making advanced polyester materials and liquid crystalline polymers. The more advanced method for preparing 2,6-NDA is the direct oxidation of 2,6-dialkylnaphthalene (2,6-DAN). Since isopropyl group is more hindered than methyl and ethyl group, a β-selective isopropylation could be expected in case of using shape selective zeolite catalysts instead of the conventional Friedel-Crafts alkylation. A particularly preferred catalyst is synthetic Mordenite having a specific Si/Al ratio, which results in a high selectivity of 2,6-DIPN. It is more beneficial to the separation and purification of 2,6-DIPN from its isomers. In this paper the study on isopropylation of naphthalene over various zeolites and different dealuminated H-mordenites (HM) is reported.

Abstract: 2,6-DIPN is a precursor of 2,6-naphthalene dicarboxylic acid (2,6-NDA) which is an important monomer for making advanced polyester materials and liquid crystalline polymers. The more advanced method for preparing 2,6-NDA is the direct oxidation of 2,6-dialkylnaphthalene (2,6-DAN). Since isopropyl group is more hindered than methyl and ethyl group, a β-selective isopropylation could be expected in case of using shape selective zeolite catalysts instead of the conventional Friedel-Crafts alkylation. A particularly preferred catalyst is synthetic Mordenite having a specific Si/Al ratio, which results in a high selectivity of 2,6-DIPN. It is more beneficial to the separation and purification of 2,6-DIPN from its isomers. In this paper the study on isopropylation of naphthalene over various zeolites and different dealuminated H-mordenites (HM) is reported.

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