Improvements in the Manufacture of Carbonic Acid Gas by the Utilization of Waste Product Produced in Making Calcium and other Carbides.
Year: 1895

page_text: Date of Application, 16th Oct., 1895
Complete Specification Left, 16th July, 1°96-Accepter. 22nd Aug., 1896
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Carbonic Acid Gas by the
Utilization of Waste Product Produced in Making Calcium and
other Carbides.
We, HERBERT SAMUEL ELWORTHY, of 19, Hill Road, Bandra, Bombay, in
the Empire of India, Analytical Chemist, and PHILIP DURHAM HENDERSON,
of 32, Fopstone Road, S.W., Gentleman, do hereby declare the nature of our
invention to be as follows:-
This invention relates to the utilization for the manufacture of carbonic acid
gas, of the carbon monoxide, or what is commonly known as carbonic oxide gas,
produced in large proportion as a waste product in the manufacture of calcium
carbide, or other compounds of carbon with alkali, alkaline earth, or other metals.
In the method now practised of producing calcium carbide (CaC) for the
purpose of obtaining acytelene gas by the addition of water, a large quantity of
carbonic oxide gas or carbon monoxide (CO) is given off and is allowed to escape,
the following being the process.
Lime or limestone, and coal or other carbonaceous material are heated together
in intense heat such as that of an electric force, the result being solid calcitu
carbide and a ierge proportion of carbonic oxide.
By our present invention we collect the carbonic oxide gas from the furnace in
which it is produced by covering the latter and conveying away the gas through
suitable passages or pipes, or in other convenient way, and we oxidize the said
carbonic oxide gas, preferably by passing it over or through metallic oxides, such
as oxide of copper, heated in a suitable furnace to a sufficiently high temperature,
the metallic oxide being reduced by degrees to a metallic state, as its oxygen is
absorbed by the carbonic oxide, and the carbon monoxide being itself converted to
carbon dioxide-or carbonic acid gas.
The metallic oxide reduced to a metallic state as described may be reconverted
to oxide by passing air, heated or not, over it whilst it is at a high temperature.
The carbonic acid manufactured in the way described, can be utilized in any of
the ordinary well-known ways, such as for aërating liquids, refrigerating, and
the like.
It will be seen that by this invention the waste carbon monoxide, produced in
the manufacture of calcium carbides by means of electric furnaces or by other
equivalent means, is simply and cheaply converted to carbon dioxide, the invention
consisting substantially in the method of utilizing the waste carbon monoxide given
off in the manufacture of the carbon compounds of the alkali, or alkaline earth, or
other metals, usually known as carbides, by converting such carbon monoxide to
carbon dioxide (carbonic acid) in the way described.
Dated this 15th day of October 1895.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicants

page_text: Improvements in the Manufacture of Carbonic Acid Gas by the
Utilization of Waste Product Produced in Making Oalcium and
other Carbides.
We, HERBERT SAMPEL ELWORTHY, of 19, Hill Road, Bandra, Bombay, in
the Empire of India, Analytical Chemist, and PHILIP DURHAM HENDERSON, of
32, opstone Road, S.W., Gentleman, 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, that is to say :-
This invention relates to the utilization for the manufacture of carbonic acid gas,
of the carbon monoxide, or what is commonly known as carbonie oxide gas,
produced in large proportion as a waste product in the manufacture of calcium
carbide, or other like compound of carbon with alkali, alkaline earth, or other
metala.
In the method wow practised of producing calcium carbide (CaC) for the
purpose of obtaining scytelene gas (CH) by the ad lition of water, a large
quantity of carbone oxide gas, or carbon monoxide, (CO), is given off and is
allowed to escape, the following being the process.
Lime or limestone, and coal or other suitable carbonaceous material are heated
together in intense heat such as that of an electric furnace, the result being solit
enloium carbide and a large proportion of carbonic oxide.
By our present invention we collect this carbonic oxide gas from the furnace in
which it is proneed as described, by covering the latter and conveying away the
gas through suitable passages or pipes, or in other convenient way, and we oxidize
the said carbonic oxide gas preferably by passing it over or thrangh metallic
aide, uch as oxide of copper, heated in a suitable furnace to a sufficiently high
temperature, the metallic oxide being thus reduced by degrees to a metallic state,
as its oxygen is almorbed by the carbonic oxide, and the latter being itself
converted to carbon dioxide-or carbonic acid gas (CO),).
The metallic oxide redured to a metallic state as described may he re-converted
to oxide by passing air, heated or not, over it whilst it is at a high temperature.
The carbonic acid manufactured in the way described, can be utilized in any of
the ordinary well-known ways, ruoli as for aërating liquids, refrigerating, and the
like.
It will be seen that by this invention the waste carbon monoxide, produced in
the manufacture of calcium carbide by means of electric furnaces or by other
equivalent means, is simply and cheaply converted to carbon dioxide, the invention
consisting substantially in the method of utilizing the waste carbon monoxide
given off in the manufacture of the carbon compounds of the alkali, or alkalin
earth, or other metals, usually known as carbides, by converting such carbon
monoxide to carbon dioxide (carbonic acid) in the way described.
By our invention economy is effected, the carbon monoxide heretofore wasted,
being converted to carbon dioxide.
We are aware that it is not novel to convert carbon monoxide, which is
practically valueless, to carbon dioxide, for which there is a large demand, by
passing the carbon monoxide over or through heated metallic oxides; and we are
also aware that it is not novel to manufacture calcium carbide (CaC',) by exposing
to very intense heat lime or limestone, and coal or other carbonaceous material,
monoxide of carbon being given off in large quantities as a waste product, and we
do not claim either of such processes separately; but

page_text: 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 method of manufacturing carbon dioxide by collecting the carbon
monoxide given off as a waste product in the manufacture of calcium carbide, in
which lime or limestone and coal or other suitable carbonaceous material are
submitted to very intense heat, and by passing the carbon monoxide so given off
over or through heated metallic oxide, substantially as described.
(2.) For the manufacture of carbon dioxide, the combination of a process for
making calcium or other carbide in which a large quantity of carbon monoxide is
given off as waste, with a process for collecting such waste carbon monoxide and
converting it to carbon dioxide by passing it over or through a heated metallio
oxide, substantially as described.
EDWARDS & Co.,
65 and 66, Chancery Lane, London, Agents for the Applicants.