IMPROVE- MENTS IN THE PROCESS OF MANUFACTURING PERMANGANATES
Year: 1884

page_text: I THEODOR KEMPF, doctor of philosophy of 177 Mullerstrasse Berlin N. Prussia,
German Empire do hereby declare the nature of the said invention for "IMPROVE-
MENTS IN THE PROCESS OF MANUFACTURING PERMANGANATES” to be as follows:-
This invention relates to the transformation of manganates into permanganates
by the aid of an electric current.
To this end the electrodes may conveniently be placed in separate cells or
compartments separated by a porous wall, the negative electrode being in water
the positive one in a solution of the manganate in question. When the electric
current is made to pass the permanganate will separate in the compartment
containing the positive electrode whilst in the compartment containing the
negative electrode the hydroxide of the corresponding metal is formed at the same
time that hydrogen is evolved.
The same transformation of the manganate into permanganato occurs if both
electrodes are simply immersed in the solution of the manganate, the metal
hydroxide is however not obtained separately in that case.
The process may be symbolised by the following formula in which M indicates
any one of the metals.
M₂ Mn O₁ + H₂ O = M Mn O₂ + M OH + H.
•
Thus, when manganate of potassa is used with separate cells, permanganate of
potassa is formed in the compartment containing the positive electrode, whilst in
the compartment filled with water and containing the negative electrode hydroxide
of potassa is produced. It is obvious that the separate cells, if employed may bo
of any form, as it is only requisite that there should be a porous partition.
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page_text: I THEODOR KEMPF, Doctor of Philosophy, 177 Müllerstrasse, Berlin N. Prussia
Germany, do hereby declare the nature of said invention for "IMPROVEMENTS IN
THE PROCESS OF MANUFACTURING PERMANGANATES" 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 the transformation of manganates into permanganates
by the aid of an electric current.
To this end the electrodes may conveniently be placed in separate cells or
compartments separated by a porous wall, the negative electrode being in water
the positive one in a solution of the manganate in question. When the electric
current is made to pass the permanganate will separate in the compartment
containing the positive electrode whilst in the compartment containing the
negative electrode the hydroxide of the corresponding metal is formed at the same
time that hydrogen is evolved.
The same transformation of the manganate into permanganate occurs if both
electrodes are simply immersed in the solution of the manganate the metal-
hydroxide is however not obtained separately in that case.
The process may be symbolised by the following formula in which M indicates
any one of the metals.
M₂ Mn O₂ + H₂ O = M Mn O₁ + MOH + H
Thus when manganate of potassium is used with separate cells, permanganate of
potassium is formed in the compartment containing the positive electrode whilst in
the compartment filled with water and containing the negative electrode hydroxide
of potassium is produced. It is obvious that the separate cells if employed; may
be of any form; as it is only requisite that there should be a porous partition.
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 transformation of manganates into permanganates by means of electrolysis
with or without the simultaneous formation of the corresponding free metallic
hydroxide.
Deted this 92nd day of Ontahan 100A