- It is known as crude C4, raffinate one either raffinate two and colorless gases, liquid under pressure, petroleum-like odor, with mild. Raffine 2 is a chemical building block used in manufacturing secondary butyl alcohol and methyl ethyl ketone.
C4 Raffinate
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![C4 Raffinate](https://worldwideenergyoil.com/wp-content/uploads/2020/11/C4-Raffinate-150x150.png)