Polymerizable propylene
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Characteristics
Propylene, under normal conditions, is a colourless, flammable gas of weak, sweetish odour, heavier than the air. Over the range of concentrations indicated above, it forms explosive mixtures with the air. Polymerisation quality propylene is produced at Olefins Department II, in the process of hydrocarbons pyrolysis. Propylene is extracted from the mixture of post-pyrolysis gases by means of distillation.
Applications
Propylene is used, among other applications, for production of the following chemicals:
- polypropylene,
- phenol
- propylene oxide and propylene glycol,
- aldehydes and higher alcohols (the "oxo" synthesis)
- acrylonitrile
- acrylic acid and its esters, etc.
Properties
| Melting point |
–185.25 °C |
| Boiling point |
–47.72 °C |
| Critical temperature |
91.61 |
| Flash point |
n/a – gas |
| Autoignition temperature |
455 °C |
| Explosive limits |
2.0 ÷ 11.1 % by volume |
| Density of gas at 25 °C |
1.75 g/dm3 |
| of liquid at –47,7 °C |
0.61 g/cm3 |
| Gas pressure at 20 °C |
960 kPa |
| Relative pressure (air = 1) |
1.48 |
| Solubility in water at 20 °C |
1013 kPa 384g/m3 |
| Molar mass |
42.081 |
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