Year: 1886

page_text: Date of Application, 5th Nov., 1886.
Complete Left, 22nd July, 1887.
Complete Accepted, 9th Sept., 1887.
I, JAMES BALLANTYNE HANNAY, of Cove Castle, Loch Long, in the County of
Dumbarton, North Britain, Chemist, do hereby declare the nature of this Invention
to be as follows, that is to say:―
My said Invention has for its object the manufacturing of sulphuric acid in an
improved and very economical manner, involving the use of apparatus or plant of a
less costly kind than that which is at present commonly employed.
In carrying out my Invention I form sulphurous acid gas in the ordinary way by
burning or heating sulphur, pyrites or any suitable compound of sulphur ; and I
cause the sulphurous acid gas along with nitrous acid gas obtained in any well known
way to pass along a flue, and through water or any suitable solution in apparatus of
the kind known as fume condensing apparatus. Any suitable modification of such
fume condensing apparatus may be employed, but I prefer to use the improved kind
described in the Provisional Specification accompanying my application for Letters
Patent No. 13416 of 1886. In this condensing apparatus the gaseous mixture is
made to pass through one or more vertical screens of wire gauze or other suitable
permeable material, which are covered by the water or solution; and the gaseous
mixture becoming minutely subdivided by passing through the screens is thereby
brought into intimate contact with the water. The result of the process is that the
sulphurous acid is converted into sulphuric acid which becomes dissolved in the water;
and the process may be continued until the solution acquires considerable strength
whereupon it is drawn off and a fresh supply of water is run into the apparatus.
The uncondensed gases which pass through the apparatus contain oxides of nitrogen
and their acids in varying proportions which may be treated by well known means so
as to be used over again in the improved process.
By my Invention sulphuric acid is rapidly formed in large quantities by means of
apparatus of moderate size; and without the use of the extensive and costly lead
chambers ordinarily employed.
Dated this Fourth day of November 1886.
EDMUND HUNT,
Per pro. David Ferguson,
Applicant's Agent.

page_text: I, JAMES BALLANTYNE HANNAY, of Cove Castle, Loch Long, in the County of
Dumbarton, North Britain, 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, that is to say :-
My said Invention has for its object the manufacturing of sulphuric acid in an
improved and very economical manner, involving the use of apparatus or plant of a
less costly kind than that which is at present commonly employed.
In carrying out my Invention I form sulphurous acid gas in the ordinary way by
burning of heating sulphur, pyrites, or any suitable compound of sulphur; and I cause
the sulphurous acid gas along with nitrous acid gas obtained in any well known way
to pass along a flue, and through water or any suitable solution in apparatus of the
kind known as fume condensing apparatus. Any suitable modification of such fume
condensing apparatus may be employed, but I prefer to use the improved kind
described in the Complete Specification of my Patent No. 16290 of 1886. In this
condensing apparatus the gaseous mixture is made to pass through one or more
vertical screens of wire gauze or other suitable permeable material, which are covered
by the water or solution; and the gaseous mixture becoming minutely subdivided by
passing through the screens is thereby brought into intimate contact with the water.
I prefer to construct the vessel of the condensing or absorbing apparatus of Caithness
paving stone. The result of the process is that the sulphurous acid is converted
into sulphuric acid which becomes dissolved in the water; and the process may be
continued until the solution acquires considerable strength whereupon it is drawn off
and a fresh supply of water is run into the apparatus. The uncondensed gases
which pass through the apparatus contain oxides of nitrogen and their acids in varying
proportions which may be treated by well known means so as to be used over again
in the improved process.
By my Invention sulphuric acid is rapidly formed in large quantities by means of
apparatus of moderate size; and without the use of the extensive and costly lead
chambers ordinarily employed.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is :-
:-
The manufacturing of sulphuric acid by causing sulphurous acid gas and nitrous
acid gas to pass along a flue and through water in apparatus of the kind described in
the Complete Specification of my Patent No. 16290 of 1886 or through other suitable
apparatus, of the kind known as fume condensing apparatus substantially as herein-
before described.