Application of Oxygen in the Manufacture of Epoxyethane (Engine Coolant/Antifreeze)

Application of Oxygen in the Manufacture of Epoxyethane (Engine Coolant/Antifreeze)

                     

Introduction

Epoxyethane or ethylene oxide (CHO), is a colorless gas at room temperature. It is very reactive and is used as an important intermediary in the manufacture of many useful chemicals. But the main usage or application of Epoxyethane is as the main constituent of engine coolants or antifreeze in cars. It is also used to produce other engine coolants/antifreeze like ethylene glycol.

What Does An Engine Coolant/Antifreeze Do?


Car engines create a great deal of energy by burning petrol or diesel. Some of this energy is used to move the vehicle forward (around one third), the other two-thirds of the energy produced is converted to heat. Around half of this heat goes out of the exhaust, whilst the remaining heat remains inside the engine block.
Car engines need a way of cooling down else they will continue to increase in temperature until the working metal components inside will begin to literally melt, fuse together and the engine will seize. Engine coolant is a water-based liquid that absorbs the heat from the engine.

How Is Epoxyethane Manufactured?


This is where oxygen comes in. Epoxyethane is manufactured by mixing ethane with oxygen, and passing it over a catalyst (finely divided silver on an inert support such as alumina), at a temperature of 520-550 K (246°C - 276°C), and under 15-20 atmospheres of pressures. Thus industries dealing with manufacture of engine coolants or antifreeze on a large scale require oxygen on a daily basis. Most of them will have oxygen generators or oxygen plants installed at their manufacturing premises. There are various oxygen gas plant manufacturers in India so ordering a plant or generator is fairly easy. 

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