IMPROVEMENTS IN THE MANUFACTURE OF BIOXIDE OF BARIUM AND ITS USE IN MAKING OXYGENATED WATER FOR BLEACHING OR FOR OTHER PURPOSES to be as follows:
Year: 1885

page_text: I, ARTHUR BRIN, of 7 Rue Gavarni, Paris, in the Republic of France, but at
present temporarily residing at 5 Sydney Street, in the County of Middlesex,
Chemist, do hereby declare the nature of the said Invention for "IMPROVEMENTS
IN THE MANUFACTURE OF BIOXIDE OF BARIUM AND ITS USE IN MAKING
OXYGENATED WATER FOR BLEACHING OR FOR OTHER PURPOSES to be as
follows:-
"
Up to the present time bi-oxide of barium has been prepared by the simple
passage of atmospheric air through or over caustic baryta. This method offers the
disadvantages that the caustic baryta absorbs carbonic acid and forms carbonate of
baryta which will not absorb oxygen, and a portion is transformed into hydrate
of baryta owing to the presence of aqueous vapour in the atmosphere.
My Invention has for its object to produce bi-oxide of barium and also eventually
manufacture from it a bleaching liquid in an improved and practicable manner.
The reduction of nitrate of baryta is effected by placing the nitrate in receptacles
and exposing it to a gradually increasing temperature according to the different
phases of the reduction and after having formed caustic baryta I remove the
receptacles containing the baryta into a vessel which I hermetically close-This
vessel I then heat from the under part to a temperature of say about 800° C, the
receptacles being arranged in the said vessel in such a manner as to allow a free
passage around them of the heated gases from the fire.
I place the closed vessel in connection with a pump so as to form a vacuum say
of about 70 centimetres of mercury in order to withdraw the nitrous vapours and
gases of every kind which would impede the subsequent absorption of oxygen by
the baryta, and when these vapours and gases cease to be given off I admit
atmospheric air which has previously been passed through a vessel containing
layers of lime and of caustic soda in order to separate the carbonic acid and
aqueous vapour contained in the said air-I employ preferably the same pump
Price Bdr

page_text: which created the vacuum to cause the atmospheric air to pass through the
chamber containing the lime and caustic soda and to force this air under pressure
over or through the baryta contained in the aforesaid vessel-A safety valve which
can be regulated allows the exit of the nitrogen which is liberated..
When the bi-oxide of barium is thus produced I remove it and use it for any
desired purpose, for example, I may pulverize it and dissolve it in any acidulated
water to make the bioxide of hydrogen known as Thenard oxygenated water,
which may be used for rapidly bleaching without deteriorating the materials
treated.

page_text: Improvements in the Manufacture of Bioxide of Barium, and its
Use in Making Oxygenated Water for Bleaching or for other
Purposes:
I ARTHUR BRIN of 7 Rue Gavarni Paris in the Republic of France but at
present temporarily residing at 5 Sydney Street in the County of Middlesex,'
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 :-
Up to the present time bioxide of Barium has been prepared by the simple
passage of atmospheric air through or over caustic baryta This method offers the
disadvantages that the caustic baryta absorbs carbonic acid and forms carbonate of
baryta which will not absorb oxygen and a portion is transformed into hydrate of
baryta owing to the presence of aqueous vapour in the atmosphere
My invention has for its object to produce bioxide of bariuin in an improved and
practicable manner and also eventually to manufacture from it an oxygenated
water for use for bleaching or other purpose.
The reduction of Nitrate of Baryta is effected by placing the nitrate in
receptacles and exposing it to a gradually increasing temperature according to the
different phases of the reduction and after having formed Caustic Baryta I remove
the receptacles containing the Baryta into a vessel which I hermetically close.
This vessel I then heat preferably from the underpart to a temperature of say
about 800 Centigrade the receptacles being arranged in the said vessel in such a
manner as to allow a free passage around them of the heated gases from the fire.
I place the closed vessel in connection with a pump so as to form in the said
vessel a vacuum say of about 70 Centimetres of mercury in order to withdraw the
nitrous vapours and gases of every kind which would impede the subsequent
absorption of oxygen by the baryta and when these vapours and gases cease to bo
given off I admit oxygen to the said vessel so that it may be taken up by the
baryta and form bioxide of Barium. This oxygen may be most conveniently
admitted in the form of atmospheric air which has previously had the carbonic
acid and aqueous vapours or particles separated therefrom. This may conveniently
be effected by passing the air through a vessel containing layers of lime and of
Caustic soda or other substances which will absorb or separate the Carbonic acid
and aqueous vapour or particles contained in the said air. I employ preferably
the same pump which is used to create vacuum to cause the atmospheric air to
pass through the chamber containing the lime and caustic soda or other suitable
substances and to force this air under pressure over or through the baryta contained
in the aforesaid vessel. A safety valve which can be regulated should be provided
in order to allow of the exit of the nitrogen which is liberated.
When the bioxide of Barium is thus produced by the combination of Oxygen
with the Baryta I remove the said Bioxide of Barium from the vessel in which it
has been produced and use it for any desired purpose for example I may pulverize

page_text: it and dissolve it in acidulated water to make the bioxide of hydrogen known as
"Thenard Oxygenated water" which may be used for rapidly bleaching without
deteriorating the materials treated.
Having now particularly described and ascertained the nature of any said
Invention and in what manner the same is to be performed I declare that what
I claim is
First The production of Bioxide of Barium by treating Caustic Baryta by heat
and a vacuum or partial vacuum so as to remove the gases which would impede or
prevent the absorption of Oxygen and then admitting oxygen to the Caustic
Baryta thus treated substantially as herein before described.
Second: The production of Bioxide of Barium by treating Caustic baryta by
heat and a vacuum or partial vacuum so as to remove the gases which would
impede or prevent the absorption of oxygen and then admitting atmospheric air
to the caustic baryta thus treated the said atmospheric air having first been treated
so as to remove therefrom carbonic acid and aqueous vapours or particles sub-
stantially as hereinbefore described.
Third-The manufacture of oxygenated water for bleaching or for other purpose
by first producing Bioxide of barium as hereinbefore described and claimed and
then pulverizing and dissolving it in acidulated water as hereinbefore described.
Dated this 97th day of March 1886.