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US5248812A Process for the isolation of 2-naphthylamine-1,5-disulphonic acid 失效
2-萘磺酰胺-1,5-二磺酸的分离方法

Process for the isolation of 2-naphthylamine-1,5-disulphonic acid
摘要:
When 2-naphthylamine-1,5-disulphonic acid is precipitated from the as-sulphonated reaction mixtures by dilution, a purer product is obtained, with a low level of adherent sulphuric acid, if the precipitation by dilution of the reaction mixture is carried out under precisely defined conditions.
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