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

• elimination of solvent drying facility.
• higher nitration temperature.
• lower solvent dilution ratio.
• all (a), (b) & (c).