What are the four stages of refining crude oil?
Refining end-products
The primary end-products produced in petroleum refining may be grouped into four categories: light distillates, middle distillates, heavy distillates and others.
What are the four stages of refining crude oil?
Refining end-products
The primary end-products produced in petroleum refining may be grouped into four categories: light distillates, middle distillates, heavy distillates and others.