Petroleum Refinery Engineering
Visbreaking

Is carried out at atmospheric pressure
Produces gasoline only
Uses natural gas as feed
Produces fuel oil of lower viscosity

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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

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

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