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

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

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Petroleum Refinery Engineering
The order of preference for feedstock to a catalytic reformer is

Virgin naphtha - coking naphtha - catalytic naphtha
Coking naphtha - virgin naphtha - catalytic naphtha
Catalytic naphtha - coking naphtha - virgin naphtha
Virgin naphtha - catalytic naphtha - coking naphtha

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