Year: 1897

page_text: Date of Application, 22nd Sept.,
1897
Complete Specification Left, 20th May, 1898-Accepted, 20th Aug., 1898
I, LOUIS DUFRASNE, of the Moulinets, near Nant, Aveyron, France, Engineer,
do hereby declare the nature of this invention to be as follows:-
This invention has for object to increase the degree of combustibility of coke
and prevent bad smells.
•
According thereto there is introduced either into the coal intended for the pro-
duction of coke, and even into coke produced by ordinary means, a certain quantity
of a carbonate that is rich in oxygen, and which has not any injurious or destruc-
tive action upon the walls of the furnaces or of the vessels to be heated.
The salt which has given me the best results is carbonate of soda.
Coke with which there has been incorporated before or after its formation say
for example, 1, 2, or 3% of carbonate of soda, ignites more easily and burns
better than ordinary coke.
In order to obtain the result in view and to carry out the invention, it is suffi-
cient to mix the carbonate intimately with the coal that is to be distilled in a
closed vessel, or in retorts. When it is desired to impart the above mentioned
qualities to coke, a sufficient quantity of the salt may be dissolved in the water that
is employed to quench the coke on its withdrawal from the furnaces or retorts,
or in which the cooled coke, which may have been produced by any ordinary
means whatever is immersed.
Of the other salts, carbonate of potash is the one which stands next to car.
bonate of soda, and which when employed like the latter, produces the best
similar results. Next in order stands carbonate of lime.
Dated thin 22nd day of Contamban 1007
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.
I, Louis DUFRASNE, of the Moulinets, near Nant, Aveyron, France, Engineer,
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:-
This invention has for object to increase the degree of combustibility of coke
and prevent all bad smells.
According thereto there is introduced either into the coal intended for the pro-
duction of coke, and even into coke produced by ordinary means, a certain quantity
of a carbonate that is rich in oxygen, and which has not any injurious or destruc-

page_text: tive action upon the walls of the furnaces in which the coke is to be burnt or of
the vessels to be heated by the combustion of the coke.
The salt which, amongst the various carbonates, has given me the best results
is carbonate of soda or potash or carbonate of lime which may advantageously be
mixed a little carbonate of soda or with a little sodic chloride i.e. common salt.
Coke with which there has been incorporated before or after its formation say
for example,, 1, 2, 3% or 4% of carbonate of soda, or of potash, or of carbonate
of lime alone or mixed with a little carbonate of soda or with a little common salt
ignites more easily and burns better than ordinary coke.
In order to obtain the result in view and to carry out the invention, it is suffi-
cient to mix the carbonate intimately with the coal that is to be distilled in closed
vessels or retorts for conversion into coke. When it is desired to impart the above
mentioned qualities to coke after its manufacture, a sufficient quantity of the salt
may be dissolved or suspended in the water that is employed to quench the coke
on its withdrawal from the closed vessels or retorts, or in which the cooled coke,
which may have been produced by any ordinary means whatever, is immersed.
Of the other salts, carbonate of potash is the one which stands next to carbon-
ate of soda, and which when employed like the latter, produces the best similar
results. Next in order stands carbonate of lime with or without a little carbonate
of soda or common salt.
Having now particularly described and ascertained the nature of the said in-
vention and in what manner the same is to be performed I declare that what I
claim is:
1. In the manufacture of coke, for the purpose of increasing the degree of com-
bustibility and preventing bad smell, the addition to the coal intended to be dis-
tilled in a closed vessel for the production of coke, of a small quantity of a carbonate
such as for example carbonate of soda or of potash, or of carbonate of lime with or
without addition of carbonate of soda, or common salt, as set forth.
2. In the manufacture of coke previously produced by ordinary means, for the
purpose of increasing its combustibility and preventing bad smell, sprinkling or
quenching the incandescent coke on its discharge from the retorts or ovens, with
water containing in solution or in suspension carbonate of soda or potash, or car-
bonate of lime with or without addition of carbonate of soda, or common salt or
immersing into such water cold coke produced by ordinary means, as set forth.
Dated this 20th day of May 1898.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.