Petroleum Refinery Engineering
The proper arrangement of the petroleum fractions in order of their boiling points is

Petrol > diesel > LPG > lubricating oil
Petrol > lubricating oil > diesel > LPG
Lubricating oil > diesel > petrol > LPG
Lubricating oil > petrol > diesel > LPG

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Petroleum Refinery Engineering
Solvent deoiling process is used for separating oil and soft wax from hard wax. Methyl iso-butyl ketone and methyl ethyl ketone (MEK) are two commonly used deoiling solvents. Use of former as the deoiling solvent has the advantages of the

All of these
Lower solvent dilution ratio
Elimination of solvent drying facility
Higher nitration temperature

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