8-Anilino-1-naphthalenesulfonic acid synthesis
- Product Name:8-Anilino-1-naphthalenesulfonic acid
- CAS Number:82-76-8
- Molecular formula:C16H13NO3S
- Molecular Weight:299.34
Yield:82-76-8 94%
Reaction Conditions:
with sulfuric acid at 120 - 155;Industrial scale;
Steps:
3 example 3
So the metering groove 237 kg aniline by adding the pot, to start stirrer 441 kg concentration of greater than 98% of concentrated sulfuric acid, in the case of the vicious circle, by adding 300 kg of 1-naphthylamine-8-sulfonic acid to continue heating, dehydrating atmosphere.When the affect reach 120-130 °C time, dehydration-end, to the volume of the material in the measurement, if it is lower than the normal volume, the aniline is added.Continued heating to 155 ±2 °C, then maintaining 10-12 hours, sampling analysis, 1-naphthylamine-8-sulfonic acid content ≤ 0.6% to be qualified, the qualified to the vacuum distillation pot, otherwise prolonged holding time.Follow-up steps of the embodiment with the specific embodiment 1 the same.The embodiment of the preparation obtained N-phenyl-1-naphthylamine-8-sulfonic acid, its yield is 94%, the purity is 98%.
References:
Tongling Chemical Group Organic Chemical Co., Ltd;Wu, Fei;Hu, Zhanglai;Zhang, Yunbao;Cheng, Liansheng CN105439912, 2016, A Location in patent:Paragraph 0037; 0038; 0039; 0040; 0041; 0042
142-04-1
180 suppliers
$10.00/10g
62-53-3
620 suppliers
$10.00/1g
82-75-7
271 suppliers
$7.00/25g
82-76-8
290 suppliers
$9.00/5g