申请人:BASF Aktiengesellschaft
公开号:US04038309A1
公开(公告)日:1977-07-26
The production of 2-hydroxynaphthalene-3-carboxylic acid by heating sodium .beta.-naphtholate in the presence of an araliphatic compound containing two aromatic radicals and/or in the presence of an aromatic ether having at least one aromatic radical etherified with an aliphatic, cycloaliphatic or araliphatic radical at a temperature of at least 200.degree. C, reaction with carbon dioxide and reaction of the salt formed with acid. The resultant 2-hydroxy-naphthalene-3-carboxylic acid is a starting material for the production of dyes, a coupling component of surface coating colors and chrome dyes and also a developer for diazotizable dyes.
在存在具有两个芳香基团的芳基烷化合物和/或至少有一个芳香基团乙醚化的脂肪、环状脂肪或芳基烷基的芳香醚的情况下,通过加热β-萘酚钠至少200℃的温度,与二氧化碳反应并将形成的盐与酸反应,从而生产2-羟基萘-3-羧酸。所得的2-羟基萘-3-羧酸是染料的原材料,是表面涂料颜料和铬染料的偶联剂,也是重氮染料的显影剂。