Difference between revisions of "Cumene"
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| + | Cumene is the common name for isopropylbenzene, an organic compound that is based on an aromatic hydrocarbon with an aliphatic substitution. It is a constituent of [[crude oil]] and refined fuels. It is a flammable colourless liquid that has a boiling point of 152 °C. Nearly all the cumene that is produced as a pure compound on an industrial scale is converted to cumene hydroperoxide, which is an intermediate in the synthesis of other industrially important [[chemicals]], primarily phenol and [[acetone]].<br><br> | ||
| + | Isopropylbenzene is stable, but may form peroxides in storage if in [[contact]] with the air. It is important to test for the presence of peroxides before heating or distilling. The chemical is also flammable and incompatible with strong oxidizing agents. Environmental laboratories commonly test isopropylbenzene using a Gas chromatography–mass spectrometry (GCMS) instrument.<br><br> | ||
| + | Commercial production of cumene is carried out through the catalytic alkylation of benzene, with the addition of propylene. Solid phosphoric acid (SPA) supported on [[alumina]] can also be used as a catalyst, and this was the case prior to the mid-1990s when zeolite-based catalysts made the other technique commercially redundant. This process is other wise known as Friedel-Crafts alkylation reaction.<br><br> | ||
| + | Isopropylbenzene is stable, but may form peroxides in storage if in [[contact]] with the air. It is important to test for the presence of peroxides before heating or distilling. The chemical is also flammable and incompatible with strong oxidizing agents. Environmental laboratories commonly test isopropylbenzene using a GCMS instrument.<br><br> | ||
| + | ==Application== | ||
| + | Fluorocarbon plastics, solvent, analytical chemistry, fumigant, insecticides. | ||
Revision as of 12:49, 11 April 2013
| Infobox on Cumene | |
|---|---|
| Example of Cumene |  |
| Facts | |
| Origin | - |
| Stowage factor (in m3/t) | - |
| Humidity / moisture | - |
| Ventilation | - |
| Risk factors | - |
Cumene
Contents
Description
Cumene (not be confused with cumin or cumulene).
| Appearance | Colorless liquid |
| Density | 0.862 g cm-3, liquid |
| Melding point | -96°C, 177 K, -141° F |
| Boiling point | 152°C, 425 K, 306°F |
| Main hazards | flammable |
| Flash point | 43°C |
| Insoluble in water |
Cumene is the common name for isopropylbenzene, an organic compound that is based on an aromatic hydrocarbon with an aliphatic substitution. It is a constituent of crude oil and refined fuels. It is a flammable colourless liquid that has a boiling point of 152 °C. Nearly all the cumene that is produced as a pure compound on an industrial scale is converted to cumene hydroperoxide, which is an intermediate in the synthesis of other industrially important chemicals, primarily phenol and acetone.
Isopropylbenzene is stable, but may form peroxides in storage if in contact with the air. It is important to test for the presence of peroxides before heating or distilling. The chemical is also flammable and incompatible with strong oxidizing agents. Environmental laboratories commonly test isopropylbenzene using a Gas chromatography–mass spectrometry (GCMS) instrument.
Commercial production of cumene is carried out through the catalytic alkylation of benzene, with the addition of propylene. Solid phosphoric acid (SPA) supported on alumina can also be used as a catalyst, and this was the case prior to the mid-1990s when zeolite-based catalysts made the other technique commercially redundant. This process is other wise known as Friedel-Crafts alkylation reaction.
Isopropylbenzene is stable, but may form peroxides in storage if in contact with the air. It is important to test for the presence of peroxides before heating or distilling. The chemical is also flammable and incompatible with strong oxidizing agents. Environmental laboratories commonly test isopropylbenzene using a GCMS instrument.
Application
Fluorocarbon plastics, solvent, analytical chemistry, fumigant, insecticides.