The diagram below shows how oil is extracted in the production of perfume. Summarise the information by selecting and reporting the main features, and make comparisons where relevant.

The diagram illustrates the process of extracting grease in the manufacture of perfume.

Overall

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,

this

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process has ten stages, beginning with the generation of heat and ending with the production of hydrolat (aromatic

water

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). In the first two stages, a

cylinder

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of

water

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is brought to a boiling point when the

water

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is heated. The resulting

steam

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is

then

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passed through a pipe to another

cylinder

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.

Next,

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this

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steam

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passes through aromatic plants located in

this

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second

cylinder

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. After the

steam

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passes through, a mixture of

steam

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and oil vapour rises to the top of

this

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cylinder

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. At stage six, the mixture of

steam

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and vapour is passed through a third barrel, where a coil is immersed in cold aqua, allowing the mixture to condense. Hot

water

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is extracted through an outlet pipe during

this

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condensation stage, shown as stage seven in the diagram.

Then

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,

water

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mixed with essential oil passes to a separator. The oil remains on the surface

while

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aromatic

water

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is drained from the separator through another pipe.