Related Questions

Selectivity of the solvent used in solvent extraction should be
A 1
B > 1
C 0
Solvent extraction is the terminology applied to the liquid-liquid extraction, which is preferred for the separation of the components of liquids, when
A Extracting solvent is cheaply & abundantly available
B One of the liquid components is heat sensitive
C Viscosity of liquid components is very high
D One of the liquid components has very high affinity towards the solvent
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
A Elimination of solvent drying facility
B Higher nitration temperature
C Lower solvent dilution ratio
D All of the above
Solvent used for extraction of oil is
A Hexane
B Methyl ethyl ketone
C Furfurol
D None of these
The solvent used in liquid-liquid extraction should have __________ less than one.
A Selectivity
B Distribution co-efficient
C Both A & B
D Neither A nor B
The solvent used in liquid extraction should not have high latent heat of vaporisation, because
A The pressure drop and hence the pumping cost will be very high
B It cannot be recovered by distillation
C Its recovery cost by distillation may be prohibitatively high
D It will decompose while recovering by distillation
Furfural solvent extraction is used for upgrading (by dissolving aromatics)
A Naphtha
B Lubricating oils
C Wax
D Cracking feedstock
Solvent used in duo-sol extraction for lube oil upgradation is a mixture of
A Propane & phenol-cresol mixture
B Methyl ethyl ketone & glycol
C Phenol & furfural
D Propane & liquid sulphur dioxide
Solvent used in the Udex (glycol) extraction process for removal of light aromatics from cracked naphtha is
A Propane
B Diethylene glycol
C Aqueous solution (10% water) of diethylene glycol
D Methyl ethyl ketone (MEK)
'Solvent naphtha' used mostly as a solvent in paints and perfumery is produced by the __________ of virgin naphtha into small boiling range cuts.
A Steam reforming
B Distillation
C Desulphurisation
D None of these

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