Improvements in Reconverting and Utilising Bye Products such as are Formed in Processes for Obtaining Chlorine.
Year: 1888

page_text: Date of Application, 28th Dec., 1888
Complete Specification Left, 24th Sept.; 1889-Accepted, 9th Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in Reconverting and Utilising Bye Products such as
are Formed in Processes for Obtaining Chlorine.
We, ROBERT HOWISON STEEDMAN, of Holly Villa, Dalmuir, in the County of
Dumbarton, North Britain, Manufacturing Chemist, and ANDREW JACKSON KIRK-
PATRICK, of 179 West George Street, Glasgow, in the County of Lanark, North
Britain, Merchant, do hereby declare the nature of this Invention to be as follows,
that is to say :-
This Invention relates in part to processes for obtaining chlorine in which sulphate
of manganese is formed but is also applicable in treating sulphate of manganese or
similar bye products obtained otherwise, and its object to utilise the sulphuric acid
of the sulphate as well as to reconvert the manganese into effective oxides, and also
to obtain increased economy in and by the processes employed.
In carrying out the Invention we add to a solution of the sulphate of manganese
carbonate of magnesia either native or artificial, preferably in the condition of a thin
cream, and we apply a heat of 212 degrees Fahrenheit or upwards under a high or
low pressure. Magnesia may be used instead of the carbonate carbonic acid being
blown through the mixture whilst it is being heated. Carbonate of manganese is
precipitated and sulphate of magnesia is formed in solution.
The carbonate of manganese is washed filtered or pressed and calcined in a furnace
to produce an oxide or oxides suitable for generating chlorine; or the carbonate of
nanganese may be treated in any other suitable known way for the said purpose.
The solution of sulphate of magnesia is by preference evaporated nearly to dryness
and mixed with chloride of sodium or of potassium and is heated in a suitable furnace
connected with an absorbing tower. Hydrochloric acid is evolved and is absorbed by
water or other suitable liquid in the tower, and the solution may be used for
generating chlorine. Sulphate. of soda or of potash remains in the furnace mixed
with magnesia, and the sulphate is dissolved and separated from the magnesia which
is insoluble.
The magnesia may be used over again in treating sulphate of manganese as herein-
before described being made into carbonate before or whilst admixture with the
sulphate of manganese.
The solution of sulphate of soda or of potash may be evaporated and the salt be
used in the manufacture of alkali or otherwise.
EDMUND HUNT,
Per pro. David Ferguson,
Applicants' Agent.
J
COMPLETE SPECIFICATION.
Improvements in Reconverting and Utilising Bye Products such as
are Formed in Processes for Obtaining Chlorine.
We, ROBERT HOWISON STEEDMAN, of Holly Villa, Dalmuir, in the County of
Dumbarton, North Britain, Manufacturing Chemist, and ANDREW JACKSON KIRK-
PATRICK, of 179 West. George Street, Glasgow, in the County of Lanark, North
Britain, Merchant, 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, that is to say :-
This Invention relates in part to processes for obtaining chlorine in which sulphate
of manganese is formed but is also applicable in treating sulphate of manganese or

page_text: similar bye products obtained otherwise, and its object is to utilise the sulphuric acid
of the sulphate as well as to reconvert the manganese into effective oxides, and also to
obtain increased economy in and by the processes employed.
In carrying out the Invention we add to a solution of the sulphate of manganese
carbonate of magnesia either native or artificial, preferably in the condition of a thin-
cream, and we apply a heat of 212 degrees Fahrenheit or upwards under a high or
low pressure. Magnesia may be used instead of the carbonate, carbonic acid being
blown through the mixture whilst it is being heated. Carbonate of manganese is
precipitated and sulphate of magnesia is formed in solution.
The carbonate of manganese is washed, filtered, or pressed, and calcined in a
furnace to produce an oxide or oxides suitable for generating chlorine; or the
carbonate of manganese may be treated in any other suitable known way for the said
purpose.
The solution of sulphate of magnesia is by preference evaporated nearly to dryness
and mixed with chloride of sodium or of potassium, and is heated in a suitable furnace
connected with an absorbing tower. Hydrochloric acid is evolved and is absorbed
by water or other suitable liquid in the tower, and the solution may be used for
generating chlorine. Sulphate of soda or of potash remains in the furnace mixed
with magnesia, and the sulphate is dissolved and separated from the magnesia which
is insoluble.
The magnesia may he used over again in treating sulphate of manganese as herein-
before described being made into carbonate before or during admixture with the
sulphate of manganese.
The solution of sulphate of soda or of potash may be evaporated and the salt be
used in the manufacture of alkali or otherwise.
Having now particularly described and ascertained the nature of our said Inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
The improved combination of processes for reconverting and utilising bye products
such as are formed in obtaining chlorine, the said combination consisting in treating
sulphate of manganese with carbonate of magnesia or with magnesia and carbonic.
acid, separating the carbonate of manganese and sulphate of magnesia formed,
calcining or otherwise reoxidising the carbonate of manganese, heating the sulphate of
magnesia with chloride of sodium or of potassium, and separating the magnesia,
substantially as hereinbefore described.
Dated this Twenty-third day of September 1889.
EDMUND HUNT,
Applicants' Agent.