A Process for Extraction of Metals from Ores and Minerals containing them.
Year: 1891

page_text: Date of Application, 1st July, 1891
Complete Specification Left, 28th Mar., 1892-Accepted, 30th Apr., 1892.
PROVISIONAL SPECIFICATION.
A Process for Extraction of Metals from Ores and Minerals
containing them.
I, JABEZ TURTON of No. 9 Norfolk Street, Strand, in the County of London,
Metallurgist do hereby declare the nature of this invention to be as follows :-
:-
My invention relates to the treatment of ores and minerals containing metals in
such a manner as to separate the metals, particularly precious metals, from them.
For this purpose, I reduce the ore or mineral to a fine powder, or I roast and
crush it and then subject it to the action of a strong solution in water of nitrate of
potash or of soda, common salt and sulphuric acid whereby the metals are dissolved.
The proportions of the ingredients of the solution may be varied. Practically, I
find a good proportion to be about 1 part by weight of nitrate, 2 parts of salt
and 4 parts of sulphuric acid. After the metals are dissolved I separate the
solution from the earthy matter and apply to the solution zinc or other precipitant,
whereby many of the metals, including gold if it is present, are precipitated in the
form of a powder which can be treated in any known manner for separation and
fusion of the metals. If there be silver in the mineral, it will be found in the
residue after separating the solution, in the form of chloride, which may be treated
in any known manner for separation of the silver.
Dated this 1st day of July 1891.
ABEL & IMRAY,
Agents for the Applicant.
COMPLETE SPECIFICATION.
A Process for Extraction of Metals from Ores and Minerals
containing them.
I, JABEZ TURTON, of No. 9 Norfolk Street, Strand, in the County of London,
Metallurgist, do hereby declare the nature of this invention and in what manner
the same is to be performed, to be particularly described and ascertained in and
by the following statement :-
My invention relates to the treatment of ores and minerals containing metals in
such a manner as to separate the metals, particularly precious metals from them.
For this purpose, I reduce the ore or mineral to a fine powder, or I roast and
crush it and then subject it to the action of a strong solution in water of nitrate of
potash or of soda, common salt and sulphuric acid whereby the metals are dissolved.
The proportions of the ingredients of the solution may be varied. Practically, I
find a good proportion to be about one part by weight of nitrate, two parts of salt.
and four parts of sulphuric acid. After the metals are dissolved I separate the
solution from the earthy matter and apply to the solution zinc or other precipitant,
whereby many of the metals, including gold if it is present, are precipitated in the
form of a powder which can be treated in any known manner for separation and
fusion of the metals. If there be silver in the mineral, it will be found in the
residue after separating the solution, in the form of chloride, which may be treated
in any known manner for separation of the silver.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
The herein described process for extraction of metals from ores and minerals

page_text: containing them by subjecting the pulverised, roasted or crushed ore or mineral
to the action of nitrate of potash or soda, salt and sulphuric acid for solution of
the contained metals separating the earthy matters and precipitating the metal
from the solution.
Dated this 28th day of March 1802
ABEL & IMRAY,
Agents for the Applicant.