2. ● Azeotropic distillation refers to processes
whereby a new component (called
the entrainer) is added to the original feed
mixture to form (or nearly form) an
azeotrope with one (or more) of the feed
components.
●The azeotrope is then removed as either the
distillate or the bottoms.
3. ● Usually refers to the specific technique of
adding another component to generate a
new, lower-boiling azeotrope that is
heterogeneous (e.g. producing two,
immiscible liquid phases), such as the
example below with the addition of
benzene to water and ethanol.
4. ● Azeotropic distillation also refers to those
processes in which a new component is added
to an original feed mixture to break an
azeotrope that otherwise would be formed by
the feed components.
● The purpose of deliberately adding the
entrainer is either to separate one component
of a closely boiling pair or to separate one
component of an azeotrope.
5. The entrainer E is a
medium boiler (i.e. its
boiling point in
intermediate between
components A and B),
or is a low boiler that
can form an
intermediate boiling
maximum azeotrope
with A.
6. The feed (A and B)
is mixed with the
entrainer E before
entering column C1.
7. Component B (which
is essentially free of
the azeotrope A-E) is
removed from the
bottom of column C1,
while the overhead
vapour from C1 is fed
to column C2.
8. Component A is
removed as overhead
product and
entrainer E as the
bottoms product.
The entrainer is
recycled back to
column C1.
9. ● Azeotropic distillation is provided by us to
many of our customers is to break an
azeotrope in distillation.
● It is usually denotes the specific technique of
adding new constituent to produce a novel,
lower-boiling azeotrope that is heterogeneous.
We construct the unit with the specification
provided by the customers.
