AN IMPROVED METHOD OF UTILIZING THE WASTE MATERIALS EMPLOYED FOR THE PURIFICATION OF LIGHTING-GAS
Year: 1884

page_text: I, HENRY SPRINGMANN, one of the firm of Carl Pieper, Civil-Engineer and Patent-
Agent, resident at 109/110 Gneisenaustrasse, Berlin SW., Prussia, do hereby
declare the nature of the said invention for "AN IMPROVED METHOD OF UTILIZING
THE WASTE MATERIALS EMPLOYED FOR THE PURIFICATION OF LIGHTING-GAS,"
a communication to me from Dr. Hipp, of Hamburg, German Empire and Dr.
Grüneberg, of Kalk near Cologne on the Rhine, Prussia, German Empire to be as
follows:-
This invention rolates to an improved method of utilizing the waste materials
employed for the purification of lighting-gas.
As known, the materials having been employed in gaz-purifiers contain, besides
sulphur, a certain amount of ammonia salts and cyanogen compounds and it is the
object of the present invention to extract from such materials in but one operation
all the ammonia that can be given off by both the ammonia salts and the cyanogen
compounds as well as the sulphur if desired.
For this purpose the inventors proceed as follows :
The materials removed from the gaz purifiers are reduced to fine powder, and
then mixed with as much hydrate of lime as is required for both converting the
cyanogen compounds into ammonia and decomposing the ammonia salts present.
This mixture is filled into a suitable distilling-vessel and heated therein until all
ammonia is driven off. The residue consisting of iron and lime is then removed
from the vessel.
•
By preference the inventors employ a rotating distilling-vessel of cylindrical
form one axle of which is hollow to give issue to the evolved gases and the
sulphury and other vapours, and the said sulphury vapours may be condensed to
solid sulphur or conducted into water, whereby precipitated sulphur is obtained.
The said materials may, however previous to undergoing the described treatment,
be freed from the sulphur by any known manner.

page_text: COMPLETE SPECIFICATION.
I, HENRY SPRINGMANN, one of the firm of Carl Pieper, Civil Engineer and
Patent-Agent, resident at 109/110 Gneisenaustrasse, Berlin S.W., Prussia, do
"IMPROVED METHOD OF
hereby declare the nature of the said invention for an
UTILIZING THE WASTE MATERIALS EMPLOYED FOR THE PURIFICATION OF LIGHTING-
GAS," & communication to me from Dr. Hipp, of Hamburg, German Empire, and
Dr. Grüneberg, of Kalk near Cologne on the Rhine, Prussia, German Empire, 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 an improved method of utilizing the waste material
employed for the purification of lighting-gas.
As is known, the waste materials from gas-purifiers contain, besides sulphur, a
certain amount of ammonia salts and cyanogen compounds. Hitherto these
substances have been recovered from the said material in separate operations.
Thus, according to one method, the ammonia salts are first lixiviated out by water,
and the cyanogen compounds thereupon extracted by means of alcalic solutions, the
sulphur remaining behind in the mass. According to another method, the sulphur
is first extracted by sulphuret of carbon, and the residue then treated in the
manner stated, in order to obtain the ammonia and cyanogen compounds present,
The object of this invention is to extract from the said waste material in but
one operation all the ammonia that can be given off by both the ammonia salts and
the cyanogen compounds, as well as the sulphur if desired.
For this purpose the inventors proceed as follows:.
The materials removed from the gas-purifiers are reduced to fine powder, and
then mixed with as much hydrate of lime as is required for converting the
cyanogen-compounds into ammonia, and decomposing the ammonia salts present.
This mixture is filled into a suitable distilling-vessel and heated therein until all
the ammonia is driven off. The ammonia-gas produced is caused to be absorbed by
water or utilized in any known inanner. The sulphury vapours evolved together
with the ammonia may be condensed to form solid sulphur, or conducted into
water, whereby precipitated sulphur is obtained. The residue consisting of iron
and lime is then removed from the vessel, and the latter charged with a fresh
quantity of waste. The sulphur may, however, be extracted by any known means
from the waste materials previous to their undergoing the described treatment.
By preference the inventors employ a rotating distilling-vessel of cylindrical
form with a door for filling in the mass, and one trunnion of which is hollow to
give issue to the evolved gases and the sulphury and other vapours.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed, I declare that what
I claim is:
The described method of utilizing the waste materials from the purification of
lighting-gas, consisting in mixing the said materials with as much hydrate of
lime as is required for converting the cyanogen-compounds into ammonia and
decomposing the ammonia salts present, and then heating this mixture in suitable
distilling-vessels until all the ammonia is driven off,
Dated this sixteenth day of December 1884.