Concept explainers
Interpretation:
The process of separation of petroleum into its fractions is to be studied.
Concept introduction:
The process of separation of petroleum into its fractions is done by fractional distillation.
Fractional distillation is the process of separation of liquid mixture into its components depending upon difference in boiling point.
Answer to Problem 20A
Petroleum is separated into its fractions using fractional distillation. Petroleum is vaporized and added to distillation tower. The gas rises in the tower and starts cooling. Each fraction is then condense to its liquid form and get separated from other fractions.
Explanation of Solution
Three main fractions level are forms as:
Light distillate include gasoline, naphtha, kerosene, paraffin and have boiling point in range 70-200°C.
Medium distillate includes diesel fuel and gas oil and have boiling point in range 200-350°C.
Heavy distillate includes fuel oil and have boiling point above 350°C.
In fractional distillation of petroleum, different products are formed at different temperature.
Name | The approximate boiling range | use |
Asphalt | >300°C | For making roads |
Paraffin wax | 190-250°C | For making Vaseline |
Fuel oil | >350°C | For running heavy vehicles |
Kerosene oil | 190-250°C | As a household fuel |
Gasoline | 25-75°C | For light vehicles |
Petroleum gas | 250-350°C | Household fuel |
Lubricating oil | >350°C | Used for lubricating machines |
Thus, petroleum is separated into its fractions by fractional distillation.
Chapter 20 Solutions
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