Production of Sulphur therefrom.
Year: 1888

page_text: Date of Application, 26th Nov., 1888
Complete Specification Left, 30th Mar., 1889
Complete Specification Accepted, 25th May, 1889
Production of Sulphur therefrom.
I, JACOB BAYNES THOMPSON, of 130 Queen's Road, Peckham, in the County of
Surrey, Chemist, do hereby declare the nature of this invention to be as follows:-
This Invention has for its object the reduction of Hydrogen sulphide, below the
heat of combustion, by means of the fumes arising from the decomposition of sodium
or potassium nitrate, or by hydrogen nitrate, associated with sufficient atmospheric
air, so that the nitric oxide may recoup itself for the oxygen given up to the hydrogen
of the hydrogen sulphide.
In the first case, the reaction is similar to that which takes place in the sulphuric acid
chamber between the nitre fumes and the sulphurus acid, with this difference: that
the reaction with the sulphurous acid is additive, but in this case it is disruptive.
In the second case, nitric acid is placed in a dish or tray in the reaction chamber
where the hydrogen sulphide comes in contact with it, and the heat of the reaction is
sufficient to raise abundance of nitric fumes so that the reaction goes on rapidly,
water vapour being formed and flowers of sulphur set free. Either of these modes of
working may be used, according to convenience or cost.
The reaction may be represented by the following equation :
H, S+NO,
S+H₂O+NO.
The nitric oxide (NO) immediately takes one equivalent of oxy
present and again becomes NO, and commences a fresh reaction or
0 of hydrogen sulphide.

page_text: Improvements in the Reduction of Hydrogen Sulphide for the
Production of Sulphur therefrom.
I, JACOB BAYNES THOMPSON of-77 Lausanne Road, Peckham, in the County of
Surrey, 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, reference being had to the accompanying drawings and to the
letters and figures marked thereon, that is to say :-
My invention has for its object the reduction of hydrogen sulphide below the heat of
combustion, by means of the fumes arising from the decomposition of sodium or
potassium nitrate, or by hydrogen nitrate associated with sufficient atmospheric air,
so that the nitric monoxide may recoup itself for the oxygen given up to the hydrogen
of the hydrogensulphide. In the first case the reaction is similar to that which
takes place in the sulphuric acid chamber between the nitre fumes and the sulphurous
acid gas, with this. difference, that the reaction with the sulphurous acid is additive,
whereas in this case it is disruptive.
In the second case nitric acid is placed in a dish, or tray, in the reaction chamber ;
when the hydrogen sulphide comes in contact with it, the heat of the reaction is
sufficient to raise abundance of nitric fumes, so that the reaction goes on rapidly, water
vapour being formed and flour (or flowers) of sulphur sent free.
Either of these modes of working may be used according to convenience, or cost.
The reaction may be represented by the following equation:
H2S+NO2S+H₂O+NO.
The nitric tetroxide is speedily reduced to NO, and finally to NO, and it imme-
diately takes up one equivalent of oxygen from the air present and again becomes. NO,
and commences a fresh reaction on another portion of hydrogen sulphide.
In carrying out this process in connection with that described in the specification
of my British Letters Patent No. 10900 of 1887, the two carbonators A, B, contribute.
to the decomposition of the hydrogen sulphide by the motion of the archimedean
screw driving the gas, which is being generated in them, through the aspirator b
into the decomposing chamber D, said aspirator being interposed on the pipe a
connecting the carbonator B with the decomposing chamber D. c is the tray in which
the nitric acid is placed. d, d, are manholes, and e, e, are sight holes for the cons
venience of the workmen clearing out the chamber.
Having now described my invention, and in what manner the same may be
performed, I claim :
The reduction of hydrogen sulphide by nitric fumes acting as a carrier for the
oxygen, substantially as herein described.
Dated this 30th day of March 1889.