Improvements in the Manufacture of Briquettes and similar Artificial Fuels, and in the Recovery of Tar Products.
Year: 1892

page_text: Date of Application, 20th May, 1892
Complete Specification Left, 18th Feb., 1893-Accepted, 8th Apr., 1893
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Briquettes and similar
Artificial Fuels, and in the Recovery of Tar Products.
I JOHN BOWING of Tilbury in the County of Essex Consulting Chemist do
hereby declare the nature of this invention to be as follows:-
I have discovered that if bituminous coal be reduced to a comparatively fine
powder either in the presence of water or alone and then wetted with water the
mixture may be used in the manufacture of briquettes in the following manner that
is to say:
I take for example a certain weight of such material as coal slack and I add to
this a certain proportion say about 20 to 30 per cent. of bituminous coal reduced
to a powder as described above and wetted with water. These bodies are then
intimately mixed and placed in a suitable vessel where they can be heated which
may be very conveniently effected by superheated steam. After a certain interval
of time, various volatile products will have passed off and may be collected and
the hot residue which is left in the vessel can be pressed into briquettes.
The proportion of the mixture to the coal slack or similar material will vary
with the character of the bituminous coal and of the coal slack or similar material
used and in all cases the best proportions can only be ascertained by experiment.
Dated this 20th day of May 1892.
JNO. BOWING.
COMPLETE SPECIFICATION.
Improvements in the Manufacture of Briquettes and similar
Artificial Fuels, and in the Recovery of Tar Products.
I JOHN BOWING of Tilbury in the County of Essex Consulting Chemist 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 :-
I have discovered that if bituminous coal be reduced to a comparatively fine
powder and wetted with water it may be used in the manufacture of briquettes in
the following manner, that is to say: I take a certain weight of the material which
is to be formed into a briquette, such for example as coal slack, and to this I add a
certain proportion, say twenty or thirty per cent. of bituminous coal reduced to a
powder. I add water either to the mixture or before mixing and when these bodies
are sufficiently mixed together and the water drained off they are heated in any
suitable vessel. The heating may be very readily effected by means of steam.
After a certain interval of time various volatile products will have passed off which
may be collected as they pass off and the hot residue which is left in the vessel can
be pressed or formed into briquettes. The proportions of the various substances
which must be adopted will vary with the character of the coal slack and the
bituminous coal or other substances used and in all cases the best proportions can
only be ascertained by experiment.

page_text: Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what
I claim is :-
The manufacture of briquettes substantially as described.