زکریا 3 ماه قبل

What is the first stage of refining?
 
 

 

Image result

atmospheric distillation

 

The first stage of refining sees molecules separated according to weight using a process known as atmospheric distillation. It starts with the oil being heated at temperatures of up to 400°C in a 60-metre deep distillation column. This causes the oil to vaporise and ascend to the top of the column.