A NEW APPLICATION OF THE GASES AND VAPORS OR FUMES RESULTING FROM THE BURNING OF PYRITES CINDERS AND OF THE ACID LIQUID PRODUCED BY THE ABSORPTION THEREOF.
Year: 1872

page_text: LETTERS PATENT to William Bradburn, of the Firm of "Bradburn
and Co.," of Wednesfield, near Wolverhampton, in the County of
Stafford, Manufacturing Chemists, for the Invention of "A NEW
APPLICATION OF THE GASES AND VAPORS OR FUMES RESULTING FROM THE
BURNING OF PYRITES CINDERS AND OF THE ACID LIQUID PRODUCED BY THE
ABSORPTION THEREOF.
"
PROVISIONAL SPECIFICATION left by the said William Bradburn at
the Office of the Commissioners of Patents, with his Petition, on
the 23rd January 1872.
I, WILLIAM BRADBURN, of the Firm of "Bradburn and Co.," of
Wednesfield, near Wolverhampton, in the County of Stafford, Manu-
facturing Chemists, do hereby declare the nature of the said Invention
for "A NEW APPLICATION OF THE GASES AND VAPORS OR FUMES RESULTING FROM

page_text: THE BURNING OF PYRITES CINDERS AND OF THE ACID LIQUID PRODUCED BY THE
ABSORPTION THEREOF," to be as follows:-
My Invention consists in the application of the gases and vapors or
fumes resulting from the burning of pyrites cinders, and of the acid
liquid produced by the absorption of the said gases and vapors or fumes
to the treatment or dissolving of phosphatic materials, either for their
application in the manufacture of superphosphate or other phosphatic
fertilizers, or for the extraction of the phosphoric acid or phosphatic
compounds for other purposes; and I accomplish the said object by
passing the said gases, vapors, or fumes through such phosphatic
materials in flues, tanks, or towers, or similar receivers or conduits,
and also by passing the said acid liquid through or down towers or
similar erections containing such materials, the undissolved portion of
the said materials being conveyed into a vat or suitable receiver, and
stirred by means of agitators with the said acid liquid.
SPECIFICATION in pursuance of the conditions of the Letters Patent,
filed by the said William Bradburn in the Great Seal Patent Office
on the 22nd July 1872.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
BRADBURN, of the Firm of "Bradburn and Co.," of Wednesfield, near 2
Wolverhampton, in the County of Stafford, Manufacturing Chemists,
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 seventy-two, in 2
the thirty-fifth year of Her reign, did, for Herself, Her heirs and
successors, give and grant unto me, the said William Bradburn, Her
special licence that I, the said William Bradburn, my executors, adminis-
trators, and assigns, or such others as I, the said William Bradburn,
my executors, administrators, and assigns, should at any time agree 3
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

page_text: "A NEW APPLICATION OF THE GASES AND VAPOURS OR FUMES RESULTING FROM
THE BURNING OF PYRITES CINDERS, AND OF THE ACID LIQUID PRODUCED BY THE
ABSORPTION THEREOF," upon the condition (amongst others) that I, the
said William Bradburn, my executors or administrators, by an instrument
in writing under my, or their, or one of their hands and seals, 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 William Bradburn, do hereby
declare the nature of my said 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 consists in the application of the gases, vapours, or
fumes resulting from the burning or roasting of pyrites cinders, or
substances of a similar character which give off sulphur in vapour when
they are burned or roasted, to the dissolving of phosphatic materials or
materials containing phosphoric acid, for the purpose of manufacturing
suitable superphosphates, or other phosphates which are to be used for the
purpose of fertilizing the earth in the methods well understood and
practised, or to the manufacture or production of phosphoric acid, or
substances, or compounds containing phosphoric acid, which may be
used for other purposes.
For the purpose of carrying out my Invention, I take the vapours or
fumes resulting from the burning or roasting of pyrites (sulphuret of
iron, copper, or other suitable minerals or metal) which vapours or fumes
contain sulphurous acid gas, and I cause them to pass through the
phosphatic materials, or materials containing phosphoric acid, which are
placed in suitable flues, tanks, towers, receivers, or conduits for the
purpose. In this way the sulphurous acid contained in the fumes or
vapours combines with the phosphates contained in the phosphatic
materials described, and the compound can be applied to the manufacture
of fertilizing materials of the kind already described, or to other
purposes.
Sometimes instead of passing the fumes or vapours containing
sulphurous acid gas directly through the phosphatic materials described,
I first pass such fumes or vapours through water, thus producing an

page_text: acid liquor (in the method well known and practised for making
sulphuric acid), and I pass such acid liquor through or down towers or
other suitable erections in which the phosphatic material is contained.
The acid combines with the phosphates contained in such material and
the compound can be applied to the manufacture of superphosphates
or other phosphatic fertilizing materials, or to other purposes as already
described. The portion of such phosphatic material which is undissolved
by the acid liquid may be conveyed into vats, reservoirs, or other
suitable receivers, and stirred in the acid liquid by means of suitable
stirrers or agitators for the purpose of dissolving the remainder of the
phosphates which it contains.
In witness whereof, I, the said William Bradburn, have hereunto set
my hand and seal, this Twentieth day of July, in the year
of our
Lord One thousand eight hundred and seventy-two.