A Practical Handbook on the Distillation of Alcohol from Farm ProductsWright, F. B. (Frederic B.)
Science
A Practical Handbook on the Distillation of Alcohol from Farm Products
Wright, F. B. (Frederic B.)
Alcohol; Alcohol, Denatured
=The Apparatus= employed in the process of distillation is called a
_still_, and is of almost infinite variety. A still may be any vessel
which will hold and permit fermentated "wash" or "beer" to be boiled
therein, and which will collect the vapors arising from the surface of
the boiling liquid and transmit them to a condenser. The still may be
either heated by the direct application of fire, or the liquid in the
still raised to the boiling point by the injection of steam. The steam or
vapor rising from the boiling liquid must be cooled and condensed. This
is done by leading it into tubes surrounded by cold water or the "cold
mash."
The very simplest form of still is shown in Fig. 6, and consists of two
essential parts, the still, or boiler _A_, made of tinned copper, the
condenser _C_ which may be made of metal or wood and the worm _B_ made of
a coil of tinned copper pipe.
The liquor is boiled in _A_ and the vapors pass off into the worm _B_,
which is surrounded by the cold water of the condenser, the distillate
being drawn off at _f_.
The heated vapors passing through the worm _B_ will soon heat up the
water in _C_ thereby retarding perfect condensation. To prevent this, a
cold water supply pipe may be connected to the bottom of _C_ making a
connection at the top of _C_ for an over flow of the warmed up water. By
this means the lowest part of the worm will be kept sufficiently cool to
make a rapid condensation of the vapors.
[Illustration: FIG. 6.--A Simple Still.]
The boiler _A_ can be made in two parts; the upper part fitting into the
lower part snugly at _d_. The pipe from the upper part fitting the worm
snugly at _e_. This will enable the operator to thoroughly cleanse the
boiler before putting in a new lot of liquor. The joints at _e_ and _d_
should be luted with dough formed by mixing the flour with a small
portion of salt and moistening with water. This is thoroughly packed at
the junctions of the parts to prevent the escape of steam or vapor.
Fig. 7 shows such a Still as manufactured by the Geo. L. Squier Mfg. Co.,
Buffalo, N. Y.
[Illustration: FIG. 7.--Simple Direct-Heated Still.]
In an apparatus of this kind, the vapors of alcohol and water are
condensed together. But if instead of filling the condenser _C_ with cold
water, it is kept at a temperature of 176∞ F. the greater part of the
water-vapor will be condensed while the alcohol, which boils at 172.4∞ F.
passes through the coil uncondensed. If therefore the water be condensed
and collected separately in this manner, and the alcoholic vapors be
conducted into another cooler kept at temperature below 172.4∞ F., the
alcohol will be obtained in a much higher state of concentration than it
would be by a process of simple distillation.
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