Improvements relating to the Production of Soda and Chlorine.
Year: 1890

page_text: Date of Application, 13th Sept., 1890
Complete Specification Left, 12th June, 1891-Accepted, 18th July, 1891
PROVISIONAL SPECIFICATION.
Improvements relating to the Production of Soda and Chlorine.
I, THEOPHILE RAYNAUD, of Moustiers, in the Kingdom of Belgium, Chemist
do hereby declare the nature of this invention to be as follows:-
This invention relates to a process for producing soda and chlorine.
In a furnace having a double vault I heat a mixture of sea-salt and sulphide of
iron in the presence of a current of dry air, and obtain sulphate of soda mixed with
peroxide of iron, whilst chlorine is disengaged which I use for the production of
calcium hypochlorites.
To the mixture of sulphate of soda and peroxide of iron which remains in the
furnace I add charcoal, and thus obtain after calcination a double sulphide of iron
and of soda which effloresces in the presence of carbonic acid and thus yields
carbonate of soda and sulphide of iron.
I precipitate by lixiviation, and again employ the sulphide residue for decomposing
a fresh quantity of sea-salt.
Dated this 13th day of September 1890.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Production of Soda and Chlorine.
I, THEOPHILE RAYNAUD, of Moustiers, in the Kingdom of Belgium, 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 :-
This invention relates to a process for producing soda and chlorine.
In a furnace having a double vault I heat a mixture of sea-salt and sulphide of
iron in the presence of a current of dry air, and obtain sulphate of soda mixed with
peroxide of iron, whilst chlorine is disengaged which I use for the production of
calcium hypochlorites.
To the mixture of sulphate of soda and peroxide of iron which remains in the
furnace I add charcoal, and thus obtain after calcination a double sulphide of iron
and of soda which effloresces in the presence of carbonic acid and thus yields
carbonate of soda and sulphide of iron.
I precipitate by lixiviation, and again employ the sulphide residue for decomposing
a fresh quantity of sea-salt.
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 :-
First. The above-described process which consists in heating, in a double-vaulted
furnace, a mixture of sea-salt and sulphide of iron, in the presence of a current of
dry air, thus effecting the disengagement of chlorine serving for the production of
hypochlorites of lime.
Second. The above-described process which consists in adding carbon to the
mixture of sulphate of soda and peroxide of iron which remains in the furnace
after the above treatment, thus obtaining after calcination a double sulphide of
iron and of soda which effloresces in the presence of carbonic acid and thus yields
carbonate of soda and sulphide of iron.

page_text: Third. The above-described process which consists in depositing by lixiviation
and again employing the residuary sulphide for the decomposition of a fresh
quantity of sea-salt.
Fourth. The improved process of producing soda and chlorine, substantially as
hereinbefore described.
Dated this 10th day of Iun 1901
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.