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Isolation of alkali metal 2,4-dichlorophenolate and 2,4-dichlorophenol from a mixture of chlorophenols

机译:从氯酚混合物中分离碱金属2,4-二氯苯酚盐和2,4-二氯苯酚

摘要

A process for isolating an alkali-metal 2,4-dichlorophenolate and 2,4-dichlorophenol from a mixture of chlorophenols comprises reacting a mixture of chlorophenols with an aqueous solution of an alkali in the presence of an aromatic hydrocarbon with a boiling temperature within the range of from 80 to 150 DEG C or a mixture thereof with an aliphatic alcohol. The process is conducted at a mass ratio of the mixture of chlorophenols to the aromatic hydrocarbon of 1:1-3 respectively, or at a mass ratio of the mixture of chlorophenols, aromatic hydrocarbon and aliphatic alcohol equal to 1:1-3:0.05-0.2 respectively till a mixture containing the alkali metal chlorophenolates is formed which mixture is subjected to an azeotropic drying and then cooling to recover the alkali-metal 2,4-dichlorophenolate as a precipitate which, when necessary, is treated with a mineral acid to yield 2,4-dichlorophenol.
机译:从氯酚混合物中分离出碱金属的2,4-二氯苯酚盐和2,4-二氯苯酚的方法包括在芳烃存在下,在沸腾温度范围内使氯酚的混合物与碱的水溶液反应。范围为80至150℃或它们与脂族醇的混合物。该方法以氯酚与芳族烃的质量比分别为1:1-3或等于或等于1:1-3:0.05的氯酚,芳族烃和脂族醇的质量比进行。 -0.2分别直至形成含有碱金属氯酚盐的混合物,将其进行共沸干燥,然后冷却以回收作为沉淀的碱金属2,4-二氯酚盐,必要时用无机酸处理至产生2,4-二氯苯酚。

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