Fractional distillation is useful for separating a mixture of substances with narrow differences in boiling points, and is the most important step in the refining process. The oil refining process starts with a fractional distillation column.ery few of the components come out of the fractional distillation column ready for market. Many of them must be chemically processed to make other fractions. For example, only 40% of distilled crude oil is gasoline; however, gasoline is one of the major products made by oil companies.
Pleurisy means inflammation of the pleura, the membrane that covers the lungs and lines the inside of the chest cavity. Depending on its cause, pleurisy can be associated with an accumulation of fluid in the space between the lungs and chest wall called a pleural effusion, or it can be dry pleurisy, which has no fluid accumulation. Pleurisy can develop many ways, including: 1  Lung infection â In industrialized nations, bacterial pneumonia (lung infection) resulting from staphylococci, pneumococci, Haemophilus influenzae or other organisms is a frequent cause of pleurisy.
Most of the time, it happens because of an infection. If your doctor treats your infection, that can make the pleurisy -- and the pain -- go away. Causes. Bacterial infections such as pneumonia often cause pleurisy. It can also be caused by a virus such as the flu, or by a fungus. Some other things that can cause pleurisy to strike are: Lung cancer