IMPROVEMENTS IN THE EXTRACTION OF METALS FROM THE RESIDUE OF PYRITES OR OTHER MINERALS USED FOR THE MANUFACTURE OF SULPHURIO ACID OR SULPHUR, AND IN APPARATUS THEREFOR
Year: 1879

page_text: LETTERS PATENT to Carl Kesseler, of 63, Mohrenstrasse, Berlin, W., in the
Empire of Germany, Civil Engineer and Patent Solicitor, for the Invention
of "IMPROVEMENTS IN THE EXTRACTION OF METALS FROM THE RESIDUE OF
PYRITES OR OTHER MINERALS USED FOR THE MANUFACTURE OF SULPHURIO
ACID OR SULPHUR, AND IN APPARATUS THEREFOR" A communication from
Albert Wegelin, Ernst Hübner, and Emil Pollacsek, of Halle on the Saale,
in the Empire of Germany.
Sealed the 12th December 1879, and dated the 19th June 1879.
PROVISIONAL SPECIFICATION left by the said Carl Kesseler at the Office
of the Commissioners of Patents on the 19th June 1879.
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and Patent Solicitor. "IMPROVEMENTS IN THE EXTRACTION OF
METALS FROM THE RESIDUE OF PYRITES OR OTHER MINERALS USED FOR THE
MANUFACTURE OF SULPHURIC ACID OR SULPHUR, AND IN APPARATUS THEREFOR."
A communication from Albert Wegelin, Ernst Hübner, and Emil Pollacsek, of Halle
on the Saale, in the Empire of Germany.
”
The Invention consists in a new process of extracting copper, zinc, silver, or
other metals from decomposed pyrites and blends which have been roasted for
the manufacture of sulphuric acid or sulphur. The said process is carried out as
follows:-The metals are extracted by ammonia or carbonate of ammonia at a
temperature which should not exceed 45° Celsius, after which the copper and
silver are precipitated from the ammoniacal solution by zinc. The rinc extracted
from the roasted mineral as well as that which has been dissolved for precipitating
the copper and silver is then precipitated and recovered as a subcarbonate by dis-
tilling the ammoniacal solution with superheated steam. The regeneration of the
ammonia and of the carbonic acid takes place in the manner previously patented
by the same Inventors (Letters Patent No. 5066, A.D. 1878), and the apparatus
used for this process is substantially the same as described in Specification No. 5066,
A.D. 1878, with the exception of the precipitating vessels, which may be constructed
of wood, or wood lined with lead.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed
by the said Carl Kesseler in the Great Seal Patent Office on the 12th
December 1879.
if
CARL KESSELER, of 63, Mohrenstrasse, Berlin, W., in the Empire of Germany,
Civil Engineer and Patent Solicitor. IMPROVEMENTS IN THE EXTRACTION OF
METALS FROM THE RESIDUE OF PYRITES OR OTHER MINERALS USED FOR THE
MANUFACTURE OF SULPHURIC ACID OR SULPHUR, AND IN APPARATUS THEREFOR.”
A communication from Albert Wegelin, Ernst Hübner, and Emil Pollascek, of
Halle on the Saale, in the Empire of Germany.
The Invention consists in a new process of extracting metals, such as copper, zinc,
silver, from decomposed pyrites and blends which have been roasted for the manu-
facture of sulphuric acid or sulphur. The said process is carried out as follows:-
The metals are extracted by ammonia or carbonate of aminonia at a temperature
which should not exceed 45° Centigrade, after which the copper and silver are
precipitated from the so obtained ammoniacal solution by zinc. The zinc extracted
from the roasted mineral as well as that which has been dissolved for precipitating
the copper and silver is then precipitated and completely recovered as a subcarbonate
or hydrated oxyde by distilling the ammoniacal solution with superheated steam. The
regeneration of the ammonia and of the carbonic acid takes place in the manner pre-
viously patented by the same inventors (Letters Patent No. 5066, A.D. 1878), and
the various appliances used for this process and their arrangement are substantially
the same as described in Specification No. 5066, A.D. 1878, with the exception of the
precipitating vessels, which may be constructed of wood, or wood lined with lead.
CLAIMS. 1. The peculiar combination and arrangement of apparatus used in the
process of dissolving metallic oxides in carbonate of ammonia, and of precipitating
therefrom the respective metals as metallic salts. 2. The process of recovering the
carbonate of ammonia by distillation, the whole substantially as described and for
the purposes set forth.
In witness whereof, I, the said Carl Kesseler, have hereunto set my hand
and seal, this Eighth day of December, A.D. 1879.
CARL KESSELER 101