AN IMPROVED METHOD OF EXTRACTING COPPER, NICKEL, COBALT SILVER OR GOLD FROM THEIR ORES
Year: 1885

page_text: "
I LORENTZ ALBERT GROTH K.G.V. Civil Engineer and Proprietor of the Patent
Industrial and Financial Agency 30 Finsbury Pavement London E.C. do hereby
declare the nature of said invention for "AN IMPROVED METHOD OF EXTRACTING
COPPER, NICKEL, COBALT SILVER OR GOLD FROM THEIR ORES a communication to
me from abroad by Carl Gustaf Dahlerus, Civil Engineer at the Steel Works
Denain in the Republic of France, and in what manner the same is to be performed
to be particularly described in and by the following statement :—
The object of this invention is to extract copper, nickel, cobalt silver, or gold
from their ores by improved means, these metals appearing in their ores either
as a metallic material or in combination with sulphur, arsenic, oxygen, or other
materials.
The improved process of extraction is as follows.
The ore containing the above mentioned metals is roasted to remove the sulpbur
arsenic or other material and to transform the contained metals into metallic
oxides, radical, or neutral sulphur combinations or other combinations..
The ore having been roasted and pulverized is then mixed with a certain
proportion of chloride of lime, chloride of magnesia or any other chloride com-
bination which will readily develop chlor.
The proportions of the chloride combinations depend entirely upon the chemical
composition of the ores. When the ores contain silver I add more or less chloride
of sodium and sometimes diluted hydrochloric acid, the mixture is then moistened
with water or diluted acid, the chloric gas thereby developed will immediately
convert the beforementioned metals or metallic combinations into chlorurets,
chlorides, and sulphates.
In order to extract the thus formed disoluble metal salts or combinations more
water hot or cold with or without acid is added whereby the metal salts are easily
disolved. They are then precipitated in the usual way of iron lime jod calium,
green vitriol or other combinations or by electrolysis.

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 do not restrict
myself to the precise details herein described or delineated but I declare that what
I claim is
The use of chloride of lime, chloride of magnesia or other combinations which
readily develop chloric gas for the purpose of into disoluble combinations in water
or salt solutions combinations of copper nickel cobalt silver or gold as they appear
in more or less roasted ores.

page_text: I LORENTZ ALBERT GROTH, K.G.V. Civil Engineer and Proprietor of the Patent
Industrial and Financial Agency 30 Finsbury Pavement London E.C. seek leave to
amend the specification of Letters Patent, N° 5642 of 1885 as shown in red ink in
the copy of the original specification hereunto annexed.
My reason for making this amendment is as follows:―
That my clerk accidentally omitted some words in the claim and specification
In the Matter of an Application by Lorentz Albert Groth for leave to amend the
Specification filed in pursuance of an application for Letters Patent dated the
7th day of May 1885 N° 5642:

page_text: ;
Silver, or Gold from their Ores.
I LORENTZ ALBERT GROTH K.G.V. Civil Engineer and Proprietor of the
Patent Industrial and Financial Agency 30 Finsbury Pavement London E.C.
do hereby declare the nature of said invention for "AN IMPROVED METHOD OF
EXTRACTING COPPER, NICKEL, COBALT SILVER OR GOLD FROM THEIR ORES"
a communication to me from abroad by Carl Gustaf Dahlerus, Civil Engineer
at the Steel Works Denain in the Republic of France, and in what manner the
same is to be performed to be particularly described in and by the following
statement:-
The object of this invention is to extract copper, nickel, cobalt silver, or gold
from their ores by improved means, these metals appearing in their ores either
as a metallic material or in combination with sulphur, arsenic, oxygen, or other
materials.
The improved process of extraction is as follows.
The ore containing the above mentioned metals is roasted to remove the
sulphur arsenic or other material and to transform the contained metals combina-
tions into metallies, oxides, radical, or neutral sulphur combinations or other
combinations.
The ore having been roasted and pulverized is then mixed with a certain
proportion of chloride of lime, chloride of magnesia or any other chloride com-
bination which will readily develop chlor.
The proportions of the chloride combinations depend entirely upon the chemical
composition of the ores. When the ores contain silver I add more or less chloride
of sodium and sometimes diluted hydrochloric acid, the mixture is then moistened
with water or diluted acid, the chloric gas thereby developed will immediately
convert the beforementioned metals or metallic combinations into chlorurets,
chlorides, and sulphates.
In order to extract the thus formed disoluble metal salts or combinations,. more
water, hot, or cold, with or without acid is added, whereby the metal salts are easily
disolved. They are then precipitated in the usual way by means of iron, lime, jod
calium, green vitriol or other combinations or by electrolysis.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed I do not restrict

page_text: myself to the precise details herein described or delineated but I declare that what
I claim is
The use of chloride of lime, chloride of magnesia or other combinations which
readily develop chloric gas for the purpose of transforming into disoluble-com-
binations-in-water-or-salt-solutions combinations of copper, nickel, cobalt, silver, or
gold, as they appear in more or less roasted ores, into combinations soluble in pure,
or acidulated water.