IMPROVED APPARATUS FOR THE MANUFACTURE OF NITRO-GLYCERINE
Year: 1884

page_text: J, ADOLF SCHRÖDER of Dresden in the German Empire, Doctor Philisophiae, do
hereby declare the nature of my invention for "IMPROVED APPARATUS FOR THE
MANUFACTURE OF NITRO-GLYCERINE" to be as follows:-
This invention relates to improved apparatus for the manufacture of nitro-
glycerine, the construction of which is shewn in vertical section on the accom-
panying drawing. G, fig 1 is.a receptacle containing glycerine, which, on opening
the cock his caused to descend in regulated quantities through a pipe into.
a second receptacle G¹. This receptacle has a small pipe r entering a glass
tube, which passes down into the nitrising vessel N, the pipe r being pro-
vided with a cock ³. Compressed cold air is caused to pass from the pipe C
through a branch provided with a cock h² into the top of the vessel G¹ so that on
opening the cock h³ the, glycerine is caused by the air pressure to be projected in
the form of spray from the small orifice of the pipe r down the tube r' into the
bottom of the charge of nitrising acid contained in the vessel N, so as to rise in
small globules up through the acid, and thus in becoming intimately mixed
therewith, to enter into most perfect reaction with the acid, such operation
combining perfect safety with the greatest possible yield of nitroglycerine. The
specific gravity of the glycerine (1.24 to 1·25) being less than that of the nitrising
acid (17) it will possess the requisite tondency to rise through the same, while the
resulting nitroglycerine being also of a less specific gravity (16) than the acid, will
float on the top of the latter.
The supply of the nitric acid and sulphuric acid in the requisite proportions for
forming the nitrising compound, is effected through the pipe and funnel T, the
pipe having the further function of leading off all the gases generated in the
vessel N as also the air current passing through it, into the earthenware pipe V,
from which it is drawn by an exhauster and conveyed into a condensing tower.
For reducing the heat generated on the mixing of the acids, the vessel N is
contained in a metal pan K, which is continuously supplied with cold water from
the cistern W.
In fig. 1 the lower end of the glass vessel N is closed by a ground glass cock;
at fig 2 a caoutchouc tube S, connected to the vessel, is nipped together by the
screw device O, and in order to prevent the action of the acid as much as possible
upon the caoutchouc tube a quantity of mercury Q is charged into the neck of the
vessel and upper part of the tube so as to prevent access of the acid to the latter.
On discharging the contents of the vessel, the mercury is collected separately, and,
after cleansing, is used over again.
ABEL & IMRAY,
Agents for the Applicant,
28, Southampton Buildings,
London, W.C.

page_text: "I, ADOLF SCHRÖDER of Dresden in the German Empire, Doctor Philosophy, do
hereby declare the nature of my said invention for "IMPROVED APPARATUS FOR
THE MANUFACTURE OF NITRO-GLYCERINE" and in what manner the same is to be
performed to be particularly described and ascertained in and by the following
statement:—
This invention relates to improved apparatus for the manufacture of nitro-
glycerine, the construction of which is shewn in vertical section on the accom-
panying drawing. G, is a receptacle containing glycerine, which on opening the
cock his caused to descend in regulated quantities through a pipe into a second
receptacle G'.
This receptacle has a small pipe r entering a glass tube r¹ which passes down
into the nitrising vessel N, the pipe being provided with a cock h³. Compressed
cold air is caused to pass from the pipe C through a branch provided with a cock h²
into the top of the vessel G₁ so that on opening the cock h³ the glycerine is caused
by the air pressure to be projected in the form of spray from the small orifice of the
pipe down the tube 1 into the bottom of the charge of nitrising acid contained
in the vessel N, so as to rise in small globules up through the acid, and thus in
becoming intimately mixed therewith, to enter into most perfect reaction with the
acid, such operation combining perfect safety with the greatest possible yield of
nitro-glycerine. The specific gravity of the glycerine (1·24 to 1.26) being less than
that of the nitrising acid (17) it will possess the requisite tendency to rise through
the same, while the resulting nitro-glycerine, being also of a less specific gravity (1-6)
than the acid, will float on the top of the latter.
The supply of the nitric and sulphuric acids in the requisite proportions for
forming the nitrising compound, is effected through the pipe and funnel T, the
pipe having the further function of leading off all gases generated in the
vessel N as also the air current passing through it, into the earthenware conduit
pipe V, from which it is drawn by an exhauster and conveyed into a condensing
tower.
For reducing the heat generated on the mixing of the acids the vessel N is
contained in a metal pan K which is continuously supplied with cold water from
the cistern W.
For closing the lower end of the vessel Na caoutchouc tube S connected thereto,
is nipped together by the screw device O, and in order to prevent the action of the
acid as much as possible upon the caoutchouc tube, a quantity of mercury Q is
charged into the neck of the vessel and upper part of the tube so as to prevent
access of the acid to the latter. On discharging the contents of the vessel, the
mercury is collected separately and, after cleansing, is used over again.

page_text: Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The construction of apparatus for the manufacture of nitro-glycerine, combined
and operating substantially as herein described with reference to the accompanying
drawings.
2. The use in combination with the vessel N and tube S, of a stratum of
mercury Q, for the purposes setf orth.