oils and perfumes.

When pressure is reduced the boiling point will also reduce

vaccumn distillation of sugar cane is similar to filtration in the sense it is passed through a boiler where vaccuming takes place

which gas law applied on rotary vaccum distillation

In a vacuum, water boils at a much lower temperature, so you can boil away the water without having to cook something in the process. In addition, all chemical compounds boil at lower temperatures in a vacuum, than they do under normal air pressure, so various forms of distillation can be done in a vacuum, not just removal of water.