Thus, to effect the rectification of alcohol it suffices to cause its
ebullition at very low temperatures, and to keep up the ebullition
without changing such temperatures when once obtained.
It is exactly these two conditions that we have fulfilled in the
apparatus that we have just installed in our factory in Rue Immeubles
Industriels, at Paris.
By their arrangement, which is shown in the opposite figure, they form
a mechanical system permitting of the rectification of alcohols at
temperatures as low as -40 deg. or even -50 deg.. They verify
experimentally, by their operation, the theoretical deductions which
precede. The boilers, A, which, in an industrial application, may be
more numerous, receive their supply of spirits from the country
distilleries in the vicinity of the factory. There may even be
introduced directly into them _vinasses_, or washes, that is to say,
liquids, such as are obtained by alcoholic fermentation.
Above the boiler rises a rectifying column composed of superposed plates
inclined one over the other, and surmounted by a tubular condenser,
which serves to effect the retrogression of the first condensation by
means of a current of water supplied by the reservoir placed above.
On leaving this condenser, the vapors which have escaped condensation
pass into the refrigerator, C, where they are totally condensed by a
current of water which goes to the reservoir above.
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