Improvements in the Development or Preparation of High and of Chemically Pure Super-oxide of Percentage Hydrogen.
Year: 1894

page_text: Date of Application, 2nd Mar., 1894
Complete Specification Left, 26th Nov., 1894-Accepted, 29th Dec., 1894
PROVISIONAL SPECIFICATION.
Improvements in the Development or Preparation of High
and of Chemically Pure Super-oxide of
Percentage
Hydrogen.
I, Doctor RICHARD WOLFFENSTEIN, of 16 Von der Heydt-strasse, Berlin, in
the Kingdom of Prussia, German Empire, Chemist, do hereby declare the nature
of this invention to be as follows:-
Super-oxide of hydrogen in concentrated solution is very unstable and decomposes
easily, with separation of the oxygen.
The result of the new process described below is that a product is produced
which remains stable also in a concentrated solution, and even after long keeping
is not subject to decomposition. A non-decomposing and high-percentage solution
can only be produced if it is completely free from foreign substances. In particular
the solution must not react as a base, and must be free from substances which are
capable of forming with the super-oxide of hydrogen decomposing peroxides.
There must be no solid foreign bodies present-even though of quite a non-chemical
nature, e.g. sand. Also there must be contained no soluble combinations which
upon heating give insoluble separations.
The process is as follows
:-
With or without the aid of rarefied chambers, the dilute super-oxide of hydrogen
solution, which in general contains perhaps 3 per cent. peroxide, is heated at a
coustant temperature of perhaps 100°-110° C. till the fluid has a proportion of
about 60 per cent. peroxide. Then in vacuum at a moderate temperature the
super-oxide of hydrogen in the receiver is distilled over. Thereupon, with gradual
rising of the boiling point, a watery solution first passes over till at 84° C. and a
pressure of 24 millimetres a 99 per cent. super-oxide of hydrogen is distilled over.
From the, perhaps 60 per cent., solution thus obtained a chemically pure super-
oxide of hydrogen can also be produced by pouring the solution into a solvent
medium which does not combine with water, e.g. ether, and dissolving again in
water the now purified super-oxide of hydrogen out of the ether solution; or by
evaporating the ether from the ether solution and distilling the super-oxide of
hydrogen in vacuum.
Dated the Second dex of March 1804
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in the Development or Preparation of High
Percentage and of Chemically Pure Super-oxide of
Hydrogen.
I, Doctor RICHARD WOLFFENSTEIN, of 16 Von der Heydt-strasse, Berlin, in
the Kingdom of Prussia, German Empire, 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 :-
Super-oxide of hydrogen in concentrated solution is very unstable and decomposes
easily with separation of oxygen.
In
The result of the new process described below is that a product is produced
which remains stable also in a concentrated solution, and even after long keeping
is not subject to decomposition. A. non-decomposing and high-percentage solution
can easily be produced principally if it is free from foreign substances.
particular the solution must not react as a base, and must be free from substances
which are capable of forming with the super-oxide of hydrogen decomposing
peroxides. There must be no solid foreign bodies present even though of quite an
inactive chemical nature, e.g. sand. Also there must be contained no soluble
combinations which upon heating give insoluble precipitates.
The process is as follows:-
With or without the aid of rarefied chambers, the dilute super-oxide of hydrogen
solution, which in general contains perhaps 3 per cent. of super-oxide, is heated till
the fluid has a proportion of about 60 per cent. of super-oxide. Then in a vacuum
at a moderate temperature the super-oxide of hydrogen in the receiver is distilled
over. Thereupon, with gradual rising of the boiling point, a watery solution first
passes over, till at about 84° Centigrade and a pressure of 68 millimetres a
per cent. super-oxide of hydrogen is distilled over.
99
From the, perhaps 60 per cent., solution thus obtained, a chemically pure super-
oxide of hydrogen can also be produced by pouring the solution into a solvent
medium which does not combine with water, e.g. ether, and dissolving again in
water the now purified super-oxide of hydrogen out of the ether solution; or by
evaporating the ether from the ether solution and distilling the super-oxide of
hydrogen in a vacuum.
°
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed declare that what I
claim is :-
1st. The development or production of super-oxide of hydrogen of high
percentage by heating the dilute super-oxide of hydrogen solution in the free air
or in a vacuum.
2nd. The development or production of chemically pure super-oxide of hydrogen
by distilling over the super-oxide of hydrogen in a vacuum at a moderate
temperature and then purifying the solution by pouring it into a solvent medium
(e.g. ether), which does not combine with water.
Dated this 26th day of November 1894.
D. YOUNG & Co.,
11 & 12, Southampton Buildings, London, W.C.,
Agents for the Applicant.