Chinese Journal of Applied Chemistry ›› 2015, Vol. 32 ›› Issue (2): 166-170.DOI: 10.11944/j.issn.1000-0518.2015.02.140125

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Synthesis of High-Purity 2,6-Dihydroxynaphthalene

ZHANG Tianyonga, LI Shuninga, LI Bina, *, DENG Yongfenga, YUAN Zhongfeib   

  1. aCollaborative Innovation Center of Chemical Science and Engineering(Tianjin), Tianjin Key Laboratory of Applied Catalysis Science and Technology,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072 China
    bNantong Baisheng Chemical Co. Ltd.,Qidong,Jiangsu 326000,China
  • Received:2014-04-14 Revised:2014-08-27 Published:2015-02-10 Online:2015-02-10
  • Contact: Corresponding author:LI Bin, lecturer; Tel/Fax:022-2740661; E-mail:libin@tju.edu.cn; Research interests:synthesis of fine chemicals
  • Supported by:

    Supported by the National Natural Science Foundation of China(No.21103121, No.21276187), Tianjin Municipal Natural Science Foundation(No.13JCQNJC05800)

Abstract:

High purity 2,6-dihydroxynaphthalene was synthesized by one-pot alkali fusion using cheap disodium 2,6-naphthalenedisulfonate as the starting material. Under nitrogen atmosphere, in order to avoid overoxidation and obtain high yield of 2,6-dihydroxynaphthalene, phenol or antioxidant 1010 was added. Under the optimal technological conditions, the mass ratio of disodium 2,6-naphthalenedisulfonate and alkali 1:3, the mass ratio of sodium hydroxide and potassium hydroxide 2:1 in mixed alkali, the reaction temperature 345 ℃, the yield of 2,6-dihydroxynaphthalene in the alkali fusion is 86.3%. It is confirmed that the purity of 2,6-dihydroxynaphthalene is up to 99% after being refined by a methanol-water mixed solvent.

 

Key words: disodium naphthalenedisulfonate, dihydroxynaphthalene, antioxidant, mixed alkali

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