Improvements relating to the Recovery of Soda from Slags containing the same.
Year: 1889

page_text: Date of Application, 8th May, 1889
Complete Specification Left, 6th Feb., 1890-Accepted, 29th Mar., 1890
PROVISIONAL SPECIFICATION.
Improvements relating to the Recovery of Soda from Slags
containing the same.
We, THE ALKALINE REDUCTION SYNDICATE, Limited, and ALBERT BERWICK
CUNNINGHAM, Gentleman, both of Hebburn-on-Tyne, in the county of Durham, do'
hereby declare the nature of this invention to be as follows:-
Our invention has for its object to provide an economical method of recovering
soda from slags containing the same, such for example as the residues drawn from the
vessels or apparatus from which metallic sodium has been distilled, or from the slags
which occur in reducing metallic ores by an alkaline treatment
In carrying out our invention, we provide a vessel of suitable construction and
containing water Into this vessel we introduce the slags referred to whilst in a
molten condition with the result that we obtain an instant solution of all the solubles
contained in the slags.
If it is desired to convert the soda in solution into caustic soda and if the slag used
consists largely of carbonates, as in the case of sodium slags, we employ lime, that is
to say, we dissolve the molten slag in milk of lime; but where treating the slags
arising from the reduction of metallic ores by alkalı we do not use lime
The distilling vessel is placed in a furnace and subjected to a temperature not in
excess of that required in similar operations.
TIL.
حيم
1
م
1000
G. F REDFERN & Co,
4, South Street, Finsbury, London, Agents for the Applicants.
COMPLETE SPECIFICATION.
Improvements relating to the Recovery of Soda from Slags
containing the same.
We, THE ALKALINE REDUCTION SYNDICATE, Limited, and ALBERT BERWICK
CUNNINGHAM, Gentleman, both of Hebburn-on-Tyne, in the County of Durham, 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 has for its object to provide an economical method of recovering
soda from slags containing the same, such for example as the residues
drawn from the vessels or apparatus from which metallic sodium has been
distilled, or from the slags which occur in reducing metallic ores by an alkaline
treatment
Hitherto such slags have been drawn from the furnace from time to time as required
and allowed to cool, and in order to obtain the soda from such slags they have first of
all been crushed or pulverized and then lixiviated with hot water to form a sulphide
solution, the operation being both expensive and tedious
According to our invention the use of hot water is unnecessary and the sulphide
solution is obtained immediately the slag is withdrawn from the furnace.
In carrying out this invention a vessel of suitable construction is provided for con-
taining water, and into this vessel the slags referred to are introduced whilst in a
molten condition, with the result that an instant solution of all the solubles contained
in the slags takes place.
If it is desired to convert the soda in solution into caustic soda and if the slag used
consists largely of carbonates, as in the case of sodium slags, lime is advantageously

page_text: employed, that is to say, the molten slag is dissolved in milk of lime instead of in
water.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same 18 to be performed we declare that what
we claim is :-
The method of recovering soda from slags containing the same consisting in intro-
ducing such slags into a vessel containing liquid whereby the slags are dissolved.
which liquid is subsequently treated in a known manner to produce caustic soda or
carbonate of soda substantially as described.
Datel the 6th dox of Fab 1000
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicants.