The neat soap
coming either from a modern continuous saponification plant or
from a traditional batch saponification plant has a temperature
of about 80 °C and a 30% water content.
This soap must be cooled before it can be converted into tablets.
When this operation is performed in vacuum spraying plant some
moisture evaporates with a relevant increase of its TFM content.
The TFM content
of the neat soap is ca. 63%, while a standard toilet soap has
78-79% TFM.
Today the vacuum
cooling and drying process is the most commonly used for toilet
soap because it is flexible and suitable for the production of
a large range of products.
A Vacuum Cooling
and Drying Plant includes the following units:
