IMPROVEMENTS IN EXTRACTING COPPER FROM THE ORE
Year: 1854

page_text: PROVISIONAL, SPECIFICATION left by the said Richard Archibald Broo-
man at the Office of the Commissioners of Patents, with his Petition,
on the 23rd January 1854.
I, RICHARD ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of
London, Patent Agent, do hereby declare the nature of the said Invention for
"IMPROVEMENTS IN EXTRACTING COPPER FROM THE ORE, (a communication,) to be
as follows:-
The copper ore is first crushed, and has mixed with it liquid ammonia. The
ore is then placed in a vessel fitted with an agitator, by which it is well stirred,'
so as to cause the fammonia-to mix well with the pulverized ore, when the:
copper will become entirely separated from the matrix or waste stuff.
A current of air is thrown into the agitating or stirring vessel by means of
a blower
.1
Prico 2s. 8d.
&
for

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Richard Archibald Brooman in the Great Seal Patent Office
on the 22nd July 1854.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, RICHARD
ARCHIBALD BROOMAN, of 166, Fleet Street, in the City of London, Patent
Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Twenty-third day of January, in the year of our Lord
One thousand eight hundred and fifty-four, in the seventeenth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me, the
said Richard Archibald Brooman, Her special licence, that I, the said Richard
Archibald Brooman, my executors, administrators, and assigns, or such others
as I, the said Richard Archibald Brooman, my 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 "IMPROVE-
MENTS IN EXTRACTING COPPER FROM THE ORE," (communicated to me by a foreigner
residing abroad), upon the condition (amongst others) that I, the said Richard
Archibald Brooman, by an instrument in writing under my hand and seal,
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.
NOW KNOW YE, that I, the said Richard Archibald Brooman, do hereby
declare the nature of the said Invention, and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement thereof, that is to say :-
The Invention consists in mixing ammonia with the ore after, the same has
been crushed, in agitating the mass, and in introducing a current or currents of
air into the same while being agitated. No roasting of the ore is necessary in
carrying out this Invention.
The manner of proceeding is as follows:-
In treating one ton of ore about 15 to 20 hundredweights of water are.
used, to which a quantity of ammonia is added. The quantity of ammonia
varies with the quality of the ore, but must never exceed twenty-five per cent.
of the quantity of water. The ore and liquid are then placed in a vessel fitted
with an agitator, to which motion is communicated from a steam engine or

page_text: other prime mover, and while the mass is in agitation air is introduced from a
fan or blower through a pipe which enters the vessel. After the agitating and
blowing have been acting for from about six to eight hours oxide of copper will
be held in the liquid. The liquid must be drawn off and evaporated, when the
pure oxide of copper will remain after the evaporation. The ammonia may be
recovered with little loss by the processes ordinarily employed for its recovery.
And having now described the nature of the said Invention, and in what
manner the same is to be performed, I declare that I claim, extracting copper
from copper ores by mixing ammonia with the ores after they have been
crushed, by agitating the mass, and by introducing a current or currents of air
therein.
In witness whereof, I, the said Richard Archibald Brooman, have here-
unto set my hand and seal, this Twenty-second day of July, One
thousand eight hundred and fifty-four.
K. A. BRUUMAN. (L.S.)