Improvements in Obtaining Chlorine.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in Obtaining Chlorine.
I, ANDREW Ross SCOTT, of the Scott-Vogt Chemical Works, Kirkintilloch, in
the County of Dumbarton, North Britain, Manufacturing Chemist, do hereby
declare the nature of this invention to be as follows, that is to say:-
My said invention relates to the processes for obtaining chlorine described in
Vogt and Scott's Patent Specification No. 12074 of 1893; and has for its object
to improve the processes and diminish the cost.
In the processes described in the said earlier Specification hydrochloric, nitric,
and sulphuric acids are made to react together in a continuous manner, the
reactions resulting in the production of free chlorine and gaseous nitrogen com-
pounds. And it is stated in the said Specification that nitric acid is by well known
means reformed from the gaseous compounds.
By my present invention instead of reforming nitric acid from the nitrogen com-
pounds, I carry the reconverting process so far only as to form nitric oxide which
I introduce into the cycle of operations instead of nitric acid. The apparatus to
be employed is substantially the same as that described in the said carlier
Specification. The gaseous chlorine and nitrogen compounds formed in the process
by the reactions between the three acids, are led to the bottom of a tower up which
the gases pass whilst sulphuric acid passes downwards to absorb the nitrogen com
pounds. The nitrosyl sulphate (sometimes termed nitrous vitriol) formed by the
action of the sulphuric acid in the tower, is denitrated in the ordinary way by
means of steam and water or steam alone; and the nitrous anhydride thereby
liberated is mixed with air in proportions to form nitric oxide, which is used
instead of nitric acid in continuing the operations.
Dated this Nineteenth day of November 1897.
Improvements in Obtaining Chlorine.
I, ANDREW Ross SCOTT, of the Scott-Vogt Chemical Works, Kirkintilloch, in
the County of Dumbarton, North Britain, Manufacturing Chemist, do hereby
declare the nature of this invention and in what manner the same is to be per-
formed, to be particularly described and ascertained in and by the following state-
ment, that is to say:-
My said invention relates to the processes for obtaining chlorine described in

page_text: Vogt and Scott's Patent Specification No. 12074 of 1893 and has for its object
to improve the processes and diminish the cost.
In the processes described in the said earlier Specification hydrochloric, nitric,
and sulphuric acids are made to react together in a continuous manner, the
reactions resulting in the production of free chlorine and gaseous nitrogen com-
pounds. And it is stated in the said Specification that nitric acid is by well known
means reformed from the gaseous compounds.
By my present invention instead of reforming nitric acid from the nitrogen com-
pounds, I carry the reconverting processes so far only as to form nitric oxide which
I introduce into the cycle of operations instead of nitric acid. The apparatus to
be employed is substantially the same as that described in the said earlier
Specification. The gaseous chlorine and nitrogen compounds formed in the process
by the reactions between the three acids, are led to the bottom of a tower up which
the gases pass whilst sulphuric acid passes downwards to absorb the nitrogen com
pounds. The nitrosyl sulphate (sometimes termed nitrous vitriol) formed by the
action of the sulphuric acid in the tower, is denitrated in the ordinary way by
means of steam and water or steam alone; and the nitrous anhydride thereby
liberated is mixed with air in proportions to form nitric oxide, which in its more
or less pure state as so obtained is used instead of nitric acid in continuing the
operations.
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:
:-
In the processes to which the present invention relates employing nitric oxide
obtained in the manner herein before described.
Dated this Seventeenth day of August 1898.
EDMUND HUNT,
Applicant's Agent.