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

,

this

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

water

). In the first two stages, a

cylinder

of

water

is brought to a boiling point when the

water

is heated. The resulting

steam

is

then

passed through a pipe to another

cylinder

.

Next,

this

steam

passes through aromatic plants located in

this

second

cylinder

. After the

steam

passes through, a mixture of

steam

and oil vapour rises to the top of

this

cylinder

. At stage six, the mixture of

steam

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

water

is extracted through an outlet pipe during

this

condensation stage, shown as stage seven in the diagram.

Then

,

water

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

while

aromatic

water

is drained from the separator through another pipe.