5-nitronaphthalene-1-sulphonic acid synthesis
- Product Name:5-nitronaphthalene-1-sulphonic acid
- CAS Number:17521-00-5
- Molecular formula:C10H7NO5S
- Molecular Weight:253.23
Yield:-
Reaction Conditions:
with nitric acid at 20 - 40; for 3 h;
Steps:
1.2 2) Nitration
After maintaining the end, stop stirring, the sulfonated material into the nitrification pot, sampling and analysis of total acidity, while open frozen salt water cooling to 20 ~ 35 , then began to increase nitric acid.Nitric acid concentration 68 ± 0.5%, acid temperature controlled at 20 ~ 40 , no more than 35 for 3 hours.After maintaining the end of sampling and analysis of the total acidity of nitro compounds and amino value, acidity control in 45 to 46% amino value is controlled ≥410g / kg, such as failure, supplemented with nitric acid, the material until qualified.
References:
CN105418464,2016,A Location in patent:Paragraph 0018; 0019; 0020; 0021
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