IMPROVEMENTS IN TREATING SULPHIDES AND IN OBTAINING PRODUCTS THEREFROM.
Year: 1872

page_text: LETTERS PATENT to James Hargreaves, of Widnes, in the County of
Lancaster, Chemist, and Thomas Robinson, of the same Place, Iron-
founder, for the Invention of "IMPROVEMENTS IN TREATING SULPHIDES
AND IN OBTAINING PRODUCTS THEREFROM.
"
Sealed the 12th April 1873, and dated the 15th October 1872.
PROVISIONAL SPECIFICATION left by the said James Hargreaves and
Thomas Robinson at the Office of the Commissioners of Patents,
with their Petition, on the 15th October 1872.
We, JAMES HARGREAVES, of Widnes, in the County of Lancaster,
Chemist, and THOMAS ROBINSON, of the same Place Ironfounder, do
hereby declare the nature of the said Invention for "IMPROVEMENTS IN
TREATING SULPHIDES AND IN OBTAINING PRODUCTS THEREPROM," to be as
follows:-
Sulphides of iron and manganese, or either of them produced by deoxi-
dizing a mixture of oxides of the metals, or either of them, with
sulphates of soda and potash, or either of them, are reacted upon by
hydrochloric acid, either in the gaseous state or in solution, in suitable
chambers or vessels, and chlorides of iron and manganese, or either of
them, thereby produced.

page_text: When in the production of chlorides as above it is desired to produce
sulphide of hydrogen we add the hydrochloric acid to non-oxidized
sulphides of iron and manganese or either of them. When we wish to
obtain sulphur we take sulphides of iron and manganese, or either of
them, after they have been exposed to the air so as to become oxidized.
The proportions in which the reagents above-named are used are
those indicated by their chemical equivalents.
SPECIFICATION in pursuance of the conditions of the Letters Patent
filed by the said James Hargreaves and Thomas Robinson, in the
Great Seal Patent Office on the 15th April 1873.
TO ALL TO WHOM THESE PRESENTS SHALL COME, we, JAMES
HARGREAVES, of Widnes, in the County of Lancaster, Chemist, and
THOMAS ROBINSON, of the same Place, Ironfounder, send grecting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Fifteenth day of October, in the year of
our Lord One thousand eight hundred and seventy-two, in the thirty-sixth
year of Her reign, did, for Herself, Her heirs and successors, give and
grant unto us, the said James Hargreaves and Thomas Robinson, Her
special licence that we, the said James Hargreaves and Thomas Robinson,
our executors, administrators, and assigns, or such others as we, the said
James Hargreaves and Thomas Robinson, our executors, administrators,
and assigns, should at any time agree with, and no others, from time
to time and at all times thereafter during the term therein expressed,
should and lawfully might make, use, exercise, and vend, within the
United Kingdom of Great Britain and Ireland, the Channel Islands,
and Isle of Man, an Invention for "IMPROVEMENTS IN TREATING SULPHIDES
AND IN OBTAINING PRODUCTS THEREFROM," upon the condition (amongst
others) that we, the said James Hargreaves and Thomas Robinson,
our executors or administrators, by an instrument in writing under
our, or their, or one of their or our hands and scals, should particularly
describe and ascertain the nature of the said Invention, and in what
manner the same was to be performed, and cause the same to be filed in
the Great Seal Patent Office within six calendar months next, and
immediately after the date of the said Letters Patent.

page_text: NOW KNOW YE, that we, the said James Hargreaves and Thomas
Robinson, do hereby declare the nature of our said Invention, and in
what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement, that is to say:
The sulphides of iron and manganese, or either of them, produced by
deoxidizing a mixture of oxides of these metals, or either of them, with
sulphates of soda and potash, or either of them, such for instance as are
produced in the manufacture of soda and potash by the use of oxides of
iron or of manganese, are reacted upon by hydrochloric acid, either in
the gaseous state or in solution, in suitable chambers or vessels, and
chloride of iron and manganese, or either of them, thereby produced.
In practice we add sufficient hydrochloric acid to dissolve the iron or
manganese and liberate sulphur or sulphide of hydrogen.
When in the production of chlorides as above it is desired to produce
sulphide of hydrogen we add the hydrochloric acid to non-oxidized
sulphides of iron and manganese or either of them. When we wish to
obtain sulphur, we take sulphides of iron and manganese, or either of
them, after they have been exposed to the air so as to become oxidized.
Having now described the nature of our said improvements and par-
ticularized the same in such manner that others will be enabled to carry
them into effect, we claim, treating sulphides in the manner sub-
stantially as described for the purpose set forth.
In witness whereof, I, the said James Hargreaves, have hereunto
set my hand and seal, the Fourteenth day of April, in the
year of our Lord One thousand eight hundred and seventy-three.
In the presence of
JNO. M. BARKLA,
Widnes.
Witness,
JAMES HARGREAVES. (L.S.)