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0.5g苯酚或抗氧剂1010,反应温度345℃,反应时间2h,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%.
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