8-nitronaphthalene-1-sulfonic acid synthesis

5synthesis methods

Product Name:8-nitronaphthalene-1-sulfonic acid
CAS Number:117-41-9
Molecular formula:C10H7NO5S
Molecular Weight:253.2313

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Yield:-

Reaction Conditions:

with nitric acid at 20 - 40; for 3 h;Cooling;

Steps:

1.2 (2) nitration

After the end of the suspension, stop mixing, the sulfonated material into the nitration of the pot, the sample analysis of total acidity, and open frozen salt water cooling to 20 ~ 35 , this time began to add nitric acid.The temperature of acid addition of nitric acid was controlled at 20 to 40 ° C and then maintained for 3 hours.After the end of the maintenance, sampling analysis of the total acidity and amino acid value of nitrification, acidity control in 45 ~ 46%, amino value control in ≥ 410g / kg, if unqualified, additional nitric acid, until qualified discharge.

References:

CN105503662,2016,A Location in patent:Paragraph 0018; 0019; 0020; 0021

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17521-00-5 Synthesis