A NEW MODE OF PREPARING COKE FOR METALLURGICAL PROCESSES
Year: 1857

page_text: LETTERS PATENT to D' Hermann Bleibtreu, of the Alum Works, near
Bonn, on the Rhine, in the Kingdom of Prussia, for the Invention of
"A NEW MODE OF PREPARING COKE FOR METALLURGICAL PROCESSES."
Sealed the 11th August 1857, and dated the 30th May 1857.
PROVISIONAL SPECIFICATION left by the said Dr Hermann Bleibtreu at
the Office of the Commissioners of Patents, with his Petition, on the
30th May 1857.
I, Dr HERMANN BLEIBTREU, of the Alum Works, near Bonn, on the Rhine,
in the Kingdom of Prussia, do hereby declare the nature of the said Inven-
tion of "A NEW MODE OF PREPARING COKE FOR METALLURGICAL PROCESSES," to be'
as follows:-
The object of my Invention is to prevent the impurities of coal, such as
sulphur, silica, alumina, phosphorus, et caetera, from exercising an injurious
influence upon the products of metallurgical processes.
Small coal or crushed coal is mixed with powdered limestone, chalk, burnt
lime, or other calcareous substance. This calcareous compound is mixed
with the coal intended to be converted into coke, in proportions depending
upon the nature and quantity of the injurious ingredients contained in the
special variety of coal. When the coal has been well mixed with the calcareous
substance it is converted into coke in the ordinary way, and the "lime coke"
thus obtained is employed for the metallurgical processes instead of the
ordinary coal or coke. In the use of coke prepared as above described, the

page_text: conditions are secured for converting the injurious substances of the coal into
innoxious slags previous to their coming in contact with the ores or the
metal.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Dr. Hermann Bleibtreu in the Great Seal Patent Office on
the 28th November 1857.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, Dr
HERMANN BLEIBTREU, of the Alum Works, near Bonn, on the Rhine, in the
Kingdom of Prussia, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Thirtieth day of May, in the year of our Lord
One thousand eight hundred and fifty-seven, in the twentieth year of Her
reign, did, for Herself, Her heirs and successors, give and grant unto me,
the said Hermann Bleibtreu, Her special licence that I, the said Hermann
Bleibtreu, my executors, administrators, and assigns, or such others as
I, the said Hermann Bleibtreu, 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
"A. NEW MODE OF PREPARING COKE FOR METALLURGICAL PROCESSES," upon the
condition (amongst others) that I, the said Hermann Bleibtreu, 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 Hermann Bleibtreu, 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 follow-
ing statement (that is to say) :-
My Invention consists in a new method of preparing coke, by which the
impurities of the coal, such as sulphur, silica, alumina, phosphorus, et caetera
are prevented from exercising an injurious influence upon the products of
metallurgical processes for which they may be employed.

page_text: My method for preparing coke is as follows:-"Small coal or crushed coal
"is mixed with powdered limestone, chalk, burnt lime, or other calcareous
"substance. This calcareous compound is mixed with the coal intended to
"be converted into coke, in proportions depending upon the nature and
quantity of the injurious ingredients contained in the special variety of
"coal, that is to say, principally according to the chymical equivalents of
"those different substances. When the coal has been well mixed with the
"calcareous substance it is converted into coke in the ordinary way, and the
"lime-coke thus obtained is employed for the metallurgical processes
"instead of the ordinary coal or coke."
In the use of coke prepared as above described, the conditions are secured
for converting the injurious substances of the coal into innoxious slags
previous to their coming in contact with the ores or the metal. This lime-
coke is applicable for blast furnaces, cupolas, or other smelting, heating, and
refining furnaces, and to all purposes for which common coke may be used,
but it will be most valuable for the manufacture of iron and steel, and will be
the means of producing a quality of iron far superior to that produced by the
use of coal or common coke, and perhaps nearly if not quite equal to char-
coal iron. The use of the above described lime-coke instead of the common
coke will also in many cases be the means of increasing the durability of the
heating apparatus, and of diminishing or preventing the sulphur exhalations
which are so injurious to health.
Having now described the nature of my said Invention, and the manner in
which it is or may be carried into effect, I wish it to be understood, that I
claim as the Invention to be secured to me by the above in part recited
Letters Patent, the manufacture of coke in the manner herein-before
described.
In witness whereof, I, the said Hermann Bleibtreu, have hereunto set
my hand and seal, this Twenty-third day of November, in the year
of our Lord One thousand eight hundred and fifty-seven.
(L.S.) DK. HERMANN BLEIBTREU.