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It is used to manufacture dyes, drugs, plastic curing agents, etc.
There are iron powder reduction method, phenol nitrosation method, coupling reduction method, etc. 1. Iron powder reduction method is obtained by reduction of P-nitrophenol. Raw material consumption quota: nitrophenol (industrial product) 1388 kg/t; Iron powder 1778 kg/t;30 hydrochloric acid 200 kg/t. 2. Phenol Nitrosation is obtained from phenol through nitrosation, reduction and acid out. 3. Coupling reduction method uses aniline as raw material and is obtained by diazotization, coupling and reduction of iron powder. 4. The catalytic hydrogenation of nitrobenzene mostly uses platinum, palladium or both as catalysts, and is hydrogenated and reduced to phenylhydroxylamine in 10-20 sulfuric acid aqueous solution, and then translocates p-aminophenol, with a yield of 70-80. Adding surfactant to the reaction system has certain effect on improving the yield. 5. Nitrobenzene electrolytic reduction method Japan Mitsui East pressure Fine Chemicals company adopts electrolytic reduction of nitrobenzene in sulfuric acid solution, and translocates to p-aminophenol through phenylhydroxylamine.
S60: the residues and containers of this substance must be treated as hazardous waste.
S61: avoid discharging to the environment. Refer to the specific instructions/safety data sheet.
S36/37: Wear suitable protective clothing and gloves.
R68: the risk of possible irreversible effects R20/22: Harmful by inhalation and accidental swallowing. R50/53: extremely toxic to aquatic organisms, which may lead to long-term adverse effects on aquatic environment.
UN2512
The warehouse is ventilated cryodrying and stored separately from oxidant and food additives.
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