The most suitable solvent for deasphalting vacuum residue is

Which of the following is used as a solvent in deasphalting of petroleum products?

A

Furfural

B

Propane

C

Methyl ethyl ketone

D

Liquid sulphur dioxide

Solvent used in the deasphalting process is

A

Furfurol

B

Phenol

C

Propane

D

Hexane

Road grade bitumen is produced from vacuum residue by its

A

Aeration

B

Pyrolysis

C

Hydrogenation

D

Steam reforming

Catalytic cracking compared to thermal cracking of residue of vacuum distillation of crude oil

A

Gives higher yield of petrol

B

Lower octane number of petrol

C

Higher sulphur content in the product

D

Higher gum forming material in petrol

Higher boiling fractions like atmospheric residue is distilled under vacuum at low temperature because at high temperature, there is a tendency of the predominance of

A

Thermal cracking

B

Gum formation

C

Coking

D

Discoloration

In most of the vacuum crystalliser, vacuum is generally produced by means of a

A

Suction pump

B

Compressed air jet

C

Steam jet ejector with a barometric condenser

D

None of these

The ratio of the actual vacuum to the ideal vacuum in a condenser is called

A

Condenser efficiency

B

Vacuum efficiency

C

Nozzle efficiency

D

Boiler efficiency

Vacuum is applied in __________ zone, in case of a general type continuous rotary drum vacuum filter.

A

Filtering

B

Washing

C

Drying

D

All of the above

Vacuum maintained in the vacuum distillation column in oil refinery is in the range of about __________ mm Hg absolute.

A

1 to 5

B

30 to 80

C

250 to 350

D

450 to 500

The vacuum maintained in vacuum distillation unit for reduced crude is about __________ mmHg.

A

1.2

B

12

C

120

D

700

The most suitable solvent for deasphalting vacuum residue is

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