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METHOD FOR REMOVING 6-AMINOCAPRONITRILE FROM MIXTURES THAT CONTAIN 6-AMINOCAPRONITRILE, ADIPODINITRILE AND HEXAMETHYL
METHOD FOR REMOVING 6-AMINOCAPRONITRILE FROM MIXTURES THAT CONTAIN 6-AMINOCAPRONITRILE, ADIPODINITRILE AND HEXAMETHYL
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机译:从含有6-氨基己酸,己二腈和己酸的混合物中去除6-氨基己酸的方法
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摘要
The invention relates to a method for removing, by distillation, 6-aminocapronitrile from mixtures that contain 6-aminocapronitrile, adipodinitrile and hexamethylenediamine, by a) removing the hexamethylenediamine from the mixture while obtaining a mixture (I) that has a hexamethylenediamine content of less than 1 wt.- %, b) removing completely or partially the 6-aminocapronitrile from mixture (I) while obtaining a mixture (II) whose content in substances that have a higher boiling point as 6-aminocapronitrile under distillation conditions and that cannot be formed by dimerization reactions when 6-aminocapronitrile is thermally treated is less than 1 wt.- %, and c) completely or partially removing from mixture (II) the hexamethylenediamine that might be present while obtaining a mixture (IV) whose hexamethylenediamine content is higher than that of mixture (II), and a mixture (V) whose hexamethylenediamine content is lower than that of mixture (II).
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