Product performance and production principle of 1-naphthylamine-7-sulfonic acid

1-naphthylamine-7-sulfonic acid (1-naphthylamine-7-sulfonic acid) is also known as 1,7-Cleve'sacid (1,7-Cleve'sacid), 1-aminonaphthalene-7-sulfonic acid, 8 -Amino-2-naphthalenesulfonic acid (8-amino-2-naphthalenesulfonic acid), molecular formula is C ₁₀ H ₉ NO ₃ S, molecular weight is 223.

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Light gray needle-like or light purple gray columnar crystals; soluble in lye, soluble in 220 parts of water at 25°C, very slightly soluble in ethanol , ether , and blue in ferric chloride solution

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Refined naphthalene is carbonized and then nitrated with mixed acid to obtain a mixture of 1-nitronaphthalenesulfonic acid, and neutralized with magnesium carbonate to obtain a mixture of three isomers: magnesium 1-nitro-6-naphthalenesulfonate, 1-nitro-7-naphthalene Magnesium sulfonate and magnesium 1-nitro-8-naphthalenesulfonate

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Carbonization kettle, nitrification reaction kettle, neutralization kettle, storage tank, filter, reduction kettle, washing kettle, concentration kettle, acid precipitation kettle, drying oven