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Ethylbenzene (Ethylbenzene)

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Ethylbenzene

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ETHYL OXIDE
Etylobenzen
Ethylbenzene
Etilbenzene
ETHER
Benzene, ethyl-
ET2O
Ethylenzee
Ethylbenzol
Ethylenzene

+Expand -Stow

100-41-4

C8H10

106.165

2902600000

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Nature Description

Colorless liquid with aromatic smell and slightly heavier vapor than air. Freezing point-95℃, boiling point ℃,30℃(1.33kPa), relative density 0.8671(25/4 ℃), refractive index 1.5009, flash point 15℃, autoignition point ℃, specific heat capacity 1.717J/(g · ℃), viscosity 0.64mPa · s(25℃). Soluble in ethanol, benzene, carbon tetrachloride and ether, almost insoluble in water.

0.865

136-140oC

-94oC

-95℃

21oC

0.0206G/100ML

1.494-1.498

0.0206G/100ML

Product Applications

Used for organic synthesis and as solvent.

Production method

In industry, ethylbenzene is obtained by reaction of benzene and ethylene in the presence of catalyst, and can also be separated from the C8 fraction of naphtha reforming product. At present, about 90 ethylbenzene in industry is produced by benzene alkylating. 1. The liquid phase alkylating method is usually under normal pressure; Under 85-90℃, aluminum trichloride is used as catalyst to react ethylene and benzene to form ethylbenzene. The side reaction is that ethylbenzene is alkylated by ethylene to form polyethylbenzene. The conversion rate of benzene is limited to 52-55 on the right in industry, and a high molar ratio of benzene to ethylene (generally about 2) is adopted to prevent the formation of more diethylbenzene and polyethylbenzene. The average yield of ethylbenzene is 94-96. 2. Gas phase alkylating method was initially carried out gas phase alkylating reaction of ethylene and excess benzene on phosphoric acid-diatomite under the action of alumina-silica gel catalyst at 300℃ and 4-6 MPA to produce ethylbenzene. As the catalyst used cannot dealkyl polyethylbenzene, the polyethylbenzene cannot be treated. Although the production of polyethylbenzene is reduced by increasing the ratio of benzene ingredients, the distillation Cost of circulating benzene is increased. 3. Aromatic hydrocarbon prepared by catalytic reforming of ethylbenzene separated from C8 aromatic hydrocarbon. After benzene and toluene are removed by separation, the boiling points of each component of the mixed xylene fraction are very close. It takes 300-400 pieces of tower plate to separate ethylbenzene by distillation, and the reflux ratio is 75. In addition, adsorption separation and color layer separation can also be used to treat ethylbenzene. Because the separation of ethylbenzene from C8 aromatic hydrocarbons can no longer compete with benzene alkylated ethylbenzene economically, and the new generation of precious metal heterogeneous catalyst can effectively convert ethylbenzene into dimethylbenzene, therefore, the importance of ethylbenzene separation is greatly reduced.