Improvements in the Manufacture of Coal Gas.
Year: 1895

page_text: Date of Application, 2nd Oct., 1895
Complete Specification Left, 31st July, 1896-Accepted, 26th Sept., 1896
Improvements in the Manufacture of Coal Gas.
We JAMES THEOPHILUS THOMAS of Temple Mills, Bisham, in the County of
Berks, Paper Maker and ARTHUR VOCE HUNT, of 222 Upper Thames Street, in
the City of London, Paper Merchant, do hereby declare the nature of this invention
to be as follows:-
This invention has for its object to improve the manufacture of coal gas, and to
effect economy in the production by the utilization of a by-product, at present not
saleable at any but low prices, in the manufacture.
In carrying out this invention we collect the tar produced in much the usual
manner and this tar we admix in suitable proportion with some cheap small material
such for instance as common house coal ash, flue ash or dust such as is removed
from furnace flues, when coal dust is used in the furnaces, and then the mixture is
burned in the retorts along with the usual coal from which the gas is produced.
We have found that when the coal tar is admixed with the dust or ash in sufficient
quantity to produce a mortar, or pasty mass that a good result can be obtained and
this pasty mass is inserted in the retorts in limited quantity at or towards the
front ends and with the aid (preferably) of iron retorts and moderate heats we
have found that the pasty mass along with and partly covered by some of the gas
producing material of the ordinary kind.
We have in our experiments used the tarry paste in the retort in the proportion
of from about one twelfth part thereof to eleven parts by weight of the gas coal
but the relative quantity may be reduced, or varied.
The carbonized mass left after the pasty mass has been burned is easily removeable
from the retort and can be utilized as a coke fuel.
D
1005
W M. BROOKES & SON,
55 & 56 Chancery Lane, London, W.C., Agents for the Applicants.
We JAMES THEOPHILUS THOMAS of Temple Mills, Bisham, in the County of
Berks, Paper Maker, and ARTHUR VOCE HUNT, of 222 Upper Thames Street, in
the City of London Paper Merchant 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 its object to improve the manufacture of coal gas, and to
effect economy in the production by the utilization of a by-product, at present not
saleable at any but low prices.
In carrying out this invention we use the tar as produced in the usual manner in
the distillation of coal and this tar we admix in suitable proportion with some cheap
small material preferably of an inert nature such for instance as common house coal
ash, flue ash or dust such as is removed from furnace flues, when coal dust is used
1 Pmino).

page_text: in the furnaces, and subject this mixture to distillation in the retorts along with the
usual coal from which the gas is produced.
We have found that when the coal tar is admixed with the dust or ash in sufficient
quantity to produce a mortar, or pasty mass that a good result can be obtained and
in carrying out our invention we find it desirable to treat this mixture at a com-
paratively low temperature, and that the best results are obtained by putting the
mixture into the retorts at or towards the front ends.
We have in our experiments used the tarry paste in the retort in the proportion
of from about one twelfth part by weight of the tarry paste to eleven parts by
weight of the usual coal employed but the quantity may be reduced or varied.
'The carbonized mass left after the pasty mass has been burned is easily removeable
from the retort and can be utilized as a coke fuel.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The use in gas retorts for the purpose of improving the gas, of a mixture of
tar and some inert substance such as fine ash, substantially as described.
2. In the manufacture of gas, the distillation of a mixture composed of tar
and some substance such as fine ash at a comparatively low temperature,
substantially as described.
Dated the 30th day of July 1896.
WM. BROOKES & SON,
55 & 56 Chancery Lane, London, Agents for the Applicants.