IMPROVEMENTS IN THE TREATMENT OF CHLORIDE OF SODIUM FOR THE PRODUCTION OF BLEACHING POWDER AND OTHER MATERIALS THEREFROM
Year: 1884

page_text: PROVISIONAL SPECIFICATION.
We WILLIAM SUMMERBELL RICHARDSON of 5 Exeter Street Gateshead in the
County of Durham, Clerk, and WILLIAM JOHN GREY of Belle Vue House
Gateshead aforesaid Notary Public do hereby declare the nature of said Invention
for "IMPROVEMENTS IN THE TREATMENT OF CHLORIDE OF SODIUM FOR THE
PRODUCTION OF BLEACHING POWDER AND OTHER MATERIALS THEREFROM" to be as
follows:-
The object of this Invention is to effect a more economical working and a greater
production of bleach in proportion to the salt decomposed than has hitherto been
attainable and also to render unnecessary the Sulphuric acid chambers, Pyrites,
Sulphur burners, Nitrate of Soda Tanks, Ball furnaces, Black salt, boiling-pans and
other apparatus required in the ordinary process and further to effect a great
saving in the materials necessary for the production.
According to our Invention we employ a current of electricity produced from a
dynamo machine or in any other suitable manner for the decomposition of the
sodium chloride either in solution or liquified by heat. The chlorine obtained will
be used for the production of bleaching powder and the caustic soda can be used
either as such or it may be converted into sodium carbonate by the carbon dioxide
from lime kilns, or by other means of carbonating. Where a solution of the
chloride is treated the hydrogen evolved by secondary action may be used as fuel
or part of the fuel for driving the generator of Electricity.
"
J. HENRY JOHNSON,
47, Lincoln's Inn Fields, London, W.C.,
Agent for the said William Summerbell Richardson
and William John Grey.

page_text: We WILLIAM SUMMERBELL RICHARDSON of 5 Exeter Street Gateshead in the
County of Durham Clerk and WILLIAM JOHN GREY of Belle Vue House Gateshead
aforesaid Notary Public do hereby declare the nature of this invention for
"IMPROVEMENTS IN THE TREATMENT OF CHLORIDE OF SODIUM FOR THE
PRODUCTION OF BLEACHING POWDER AND OTHER MATERIALS THEREFROM " and in
what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:—
The object of this Invention is to effect a more economical working and a greater
production of bleach in proportion to the salt decomposed than has hitherto been
attainable, and also to render unnecessary the Sulphuric Acid Chambers, Pyrites,
Sulphur Burners, Nitrate of Soda Tanks, Ball furnaces, Black Salt boiling pans, and
other apparatus required in the Leblanc process, and further to effect a great saving
in the materials necessary for the production.
According to our Invention we employ a current of electricity produced from a
Dynamo machine or in any other suitable manner for the decomposition of the
Sodium Chloride, either in solution or liquefied by heat. The Chlorine obtained
will be used for the production of bleaching powder and the Caustic Soda can
be used either as such, or it may be converted into Sodium Carbonate by the
Carbon Dioxide, from lime kilns, or by other means of Carbonating. Where a
solution of the Chloride is treated, the hydrogen evolved by secondary action may
be used as part of the fuel for driving the generator of electricity.
And in order that the said Invention may be fully understood we shall now
proceed more particularly to describe the same and for that purpose shall refer to
the annexed drawing which illustrates a section of a vessel and arrangements
wherein the process according to this Invention can be conveniently carried on.
The vessel is divided into two portions A B separated by a porous partition, or
valve C, and covered by luted covers with passages for the escape of the released
products D is a steam pipe for heating the contents of the apparatus-E is a pipe
and cock by which the Caustic Soda can be drawn off and F is a pipe and cock by
which the residual liquor can be withdrawn-G is a dynamo machine, the leads
from which terminate in Carbon or other plates respectively situate in the portions
A and B of the apparatus.
The vessel (A B) is filled with Chloride of Sodium or common Salt in solution as
brine, and a current of electricity generated by the Dynamo machine G, and
passing through the solution, causes the decomposition of the Chloride of Sodium
so that its components are obtained, the caustic Soda being produced at one of the
poles (it can be removed by the cock E) and Hydrogen passing off at the pipe a
(it can be used to generate heat for warming the solution) The Chlorine
produced passes off by the pipe b and can be used for the production of bleaching
powder in the. ordinary way-The water remaining is drawn off by the cock F
and the apparatus can be recharged with Salt and the process be repeated and
BO on.
The poles in the solution should be insulated from the Vessel (A B) by India
rubber or other packing-Where it is desired to obtain Chlorine and Metallic
Sodium a vessel is charged with Salt which is fused and the current of electricity
passed through the salt substantially as herein before described with respect to the
Solution, causes the production of Chlorine at one pole and metallic Sodium at the
other pole,

page_text: We do not limit ourselves to any precise form of apparatus for conducting the
process.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed we declare that what
we claim is
The treatment of Chloride of Sodium or common Salt in solution or in a fused
state, by means of a current of electricity for the production therefrom of Chlorine
and caustic Soda or metallic Sodium, the chlorine being subsequently used if
desired for the production of bleaching powder, all substantially as hereinbefore
described.