IMPROVED PROCESS FOR OBTAINING OR RECOVERING MANGANESE OXIDE FROM MANGANESE SULPHATE PRODUCED IN OBTAINING CHLORINE
Year: 1884

page_text: I, JAMES MACTEAR, of 16 Burnbank Gardens, Glasgow, in the County of Lanark,
North Britain, Manufacturing Chemist, do hereby declare the nature of my said
invention for "IMPROVED PROCESS FOR OBTAINING OR RECOVERING MANGANESE
OXIDE FROM MANGANESE SULPHATE PRODUCED IN OBTAINING CHLORINE" to be as
follows:-
My said Invention has for its object the utilisation and reconversion into oxide
of the manganese sulphate produced as a residue in one of the known processes for
obtaining chlorine.
In carrying out my Invention I mix the solution of manganese sulphate with
sufficient magnesium chloride to be equivalent to the sulphate and to any free
sulphuric acid present in the solution. The moisture is evaporated out of contact
from air, whereupon hydrochloric acid is copiously evolved and may be condensed
and utilised in any of the well known ways. In this way there is formed a
mixture of manganese oxide and magnesium sulphate from which the latter is to
be removed by washing with water. The manganese oxide can be subsequently
raised to a state of higher oxidation by any known process for use in obtaining
chlorine or otherwise.
The magnesium sulphate may be crystallised and sold as such, or it may be
converted into magnesium chloride, for use again in the process herein before
described, by mixing it with calcium chloride, and the resulting sulphate of lime
can be calcined to form plaster of Paris. Or the magnesium sulphate may be
mixed with sodium chloride or potassium chloride to form sulphates whilst being
itself converted to chloride.

page_text: I, JAMES MACTEAR, of 16 Burnbank Gardens, Glasgow, in the County of Lanark,
North Britain, Manufacturing Chemist, do hereby declare the nature of my said
invention for "IMPROVED PROCESS FOR OBTAINING OR RECOVERING MANGANESE
OXIDE FROM MANGANESE SULPHATE PRODUCED IN OBTAINING CHLORINE," and in
what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement, that is to say :-
My said Invention has for its object the utilisation and reconversion into oxide
of the manganese sulphate produced as a residue in one of the known processes
for obtaining chlorine.
In carrying out my Invention I mix the solution of manganese sulphate with
sufficient magnesium chloride to be equivalent to the sulphate and to any free
sulphuric acid present in the solution. The mixture is evaporated out of contact
from air, whereupon hydrochloric acid is copiously evolved and may be condensed
and utilised in any of the well known waya In this way there is formed a
mixture of manganese oxide and magnesium sulphate from which the latter is to
be removed by washing with water. The manganese oxide can be subsequently
raised to a state of higher oxidation by any known process, for use in obtaining
chlorine or otherwise.
The magnesium sulphate may be crystallised and sold as such, or it may be
converted into magnesium chloride, for use again in the process herein before
described, by inixing it with calcium chloride; and the resulting sulphate of lime
can be calcined to form plaster of Paris. Or the magnesium sulphate may be
mixed with sodium chloride or potassium chloride to form sulphates whilst being
itself converted to chloride.
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
The treatment of manganese sulphate with magnesium chloride substantially in
the manner and for the purposes hereinbefore described.
EDMUND HUNT,
Applicant's Agent.