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Aniline (Aniline)

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Aniline

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Aniline
Phenylamine
Benzenamine
Aminobenzene
Aminophen
Benzeneamine
Anilin

+Expand -Stow

62-53-3

C6H7N

93.127

2921411000

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Nature Description

Colorless or yellowish oily liquid with strong odor. Slightly soluble in water, soluble in ethanol, ether and benzene.

1.0213

181-185oC

-6.2oC

76oC

36G/L(20oC)

1.5845-1.5865

36G/L(20oC)

Product Applications

It is one of the most important intermediates in the dye industry, and is also the main raw material of medicine, rubber accelerator and anti-aging agent. It can also make spices, varnish and explosives, etc. It is used as analytical reagent and also used in dyes, synthesis of resin, fake paint and perfume; Aniline is an important raw material for pesticide production, which is made of aniline..

Production method

I. Aniline is currently obtained by catalytic hydrogenation of nitrobenzene. The commonly used catalyst is Cu-SiO2, which has good selectivity, can smoothly reduce nitrobenzene to aniline, and is not easy to generate hydrogenation on benzene nucleus. The reaction is carried out in a fluidized bed reactor. After the hydrogen is purified, it is heated to 350 ~ 400℃ by the heater and then enters the evaporator. Meanwhile, nitrobenzene enters the evaporator from the high tank and is vaporized in contact with the hot hydrogen, and overheating to 180~223 ℃, the mixed gas enters from the bottom of the fluidized bed and contacts with the copper catalyst contained on silica gel in the fluidized bed, and the crude aniline and water vapor generated are discharged from the over bed. Crude aniline is cooled by condenser, separated, and then rectified to obtain finished aniline. Now the production of aniline has been continuous, and the reduction reaction is carried out under the condition of boiling reflux under normal pressure, thus realizing large-scale production of small equipment. Second, the industrial production methods of aniline mainly include the reduction method of nitrobenzene iron powder, the ammonification method of chlorobenzene, the catalytic hydroreduction method of nitrobenzene and the ammonolysis method of phenol. Among them, chlorobenzene ammoniation method has been completely stopped in foreign countries due to high cost, equipment corrosion and other reasons. Nitrobenzene hydroreduction is the main production method adopted at home and abroad. a few foreign companies such as Japan Mitsui Petrochemical Company (30,000 t/a unit) and American steel Chemical Company (90,000 t/a unit) also adopt phenol ammoniation process. There are also traditional iron powder reduction methods, such as Bayer company in Germany and Mobel company in the United States, which use iron oxide co-produced iron series raw materials by side, thus making the overall economic benefit better than the hydrogenation method. 1. Iron powder reduction method nitrobenzene is reduced with iron powder. After the reaction liquid is neutralized and washed with lime, the finished product is obtained by distillation. 2. Hydroreductive nitrobenzene in the presence of copper catalyst, carries out gas phase hydroreductive in boiling bed reactor to obtain crude aniline. After the reaction solution is condensed and layered, the finished product is distilled under reduced pressure.

Security

Dangerous Goods Marking： N

Safety instructions： S26: in case of contact with eyes, rinse with plenty of water immediately and send it to the doctor for diagnosis and treatment. S27: remove all contaminated clothing immediately. S45: If you have an accident or feel uncomfortable, go to the doctor for help immediately (it is better to bring the product container label). S46: in case of accidental swallowing, seek doctor's advice immediately (display product container or label). S61: avoid discharging to the environment. Refer to the specific instructions/safety data sheet. S36/37/39: Wear suitable protective clothing, gloves and use goggles or mask.

Hazardous material category code： R40: limited evidence indicates its carcinogenic effect. R41: risk of serious eye damage. R43: skin contact will produce allergic reactions. R50: extremely toxic to aquatic organisms. R68: the risk of possible irreversible effects R23/24/25: toxic inhalation, skin contact and accidental swallowing.

Dangerous goods transportation number： UN1547

Symbols： GHS05,GHS06,GHS08,GHS09

Storage conditions： The warehouse is ventilated cryodrying and stored separately from oxidant and food additives.

Cautionary Statement： P260;P280;P302+P352+P312;P304+P340+P312;P305+P351+P338+P310

Packaging grade： II

Signal word： Danger

Hazard Statement： H301+H311+H331;H317;H318;H341;H351;H372;H410