高纯度2,6-二羟基萘的制备工艺

doi:10.11944/j.issn.1000-0518.2015.02.140125

摘要/Abstract

摘要：

以便宜的2,6-萘二磺酸钠为原料,通过一步混合碱高温碱熔法合成高纯度2,6-二羟基萘。 N₂气保护下,添加苯酚或抗氧剂1010防止过度氧化焦油的产生,能显著提高2,6-二羟基萘收率。较佳反应条件为:2,6-萘二磺酸钠与混合碱的质量比1:3,混合碱中氢氧化钠和氢氧化钾质量比2:1,使用0.5 g苯酚或抗氧剂1010,反应温度345 ℃,反应时间2 h,碱熔收率达到86.3%。经过甲醇-水混合溶剂精制,2,6-二羟基萘纯度能达到99%。

关键词: 萘二磺酸钠, 二羟基萘, 抗氧剂, 混合碱

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

中图分类号:

O625.3

张天永, 李淑宁, 李彬, 邓永峰, 袁仲飞. 高纯度2,6-二羟基萘的制备工艺[J]. 应用化学, 2015, 32(2): 166-170.

ZHANG Tianyong, LI Shuning, LI Bin, DENG Yongfeng, YUAN Zhongfei. Synthesis of High-Purity 2,6-Dihydroxynaphthalene[J]. Chinese Journal of Applied Chemistry, 2015, 32(2): 166-170.

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