Improvements in the Preparation of 'Anhydrous Oxide of Barium, or other substances of like properties, for use in the Separation of Oxygen and Nitrogen of Atmospheric Air.
Year: 1891

page_text: Date of Application, 10th Oct., 1891
Complete Specification Left, 1st July, 1892-Accepted, 6th Aug.,
1892
PROVISIONAL SPECIFICATION.
Improvements in the Preparation of 'Anhydrous Oxide of Barium, or
other substances of like properties, for use in the Separation of
Oxygen and Nitrogen of Atmospheric Air.
We BRINS OXYGEN COMPANY LIMITED of Connaught Mansions Victoria
Street in the City of Westminster and KENNETH SUTHERLAND MURRAY
of 21 Redbourne Street Chelsea in the County of London Engineer do hereby
declare the nature of this invention to be as follows:-
In the use of anhydrous oxide of barium in the separation of oxygen and nitrogen
of atmospheric air it is desirable to present as large a surface of the oxide.as
possible. With the object of gaining a very extended surface we coat cover or
apply to a more or less inert support such for instance as pieces of fire clay, pumice
stone, iron or the like layers or coatings of the said oxide. This may be effected
in various ways and we do not limit ourselves to particular ways of effecting it.
For instance we heat dried crystals of nitrate of baryta to a high temperature so
as to liquify them and we dip the pieces of inert substance thereinto and allow the
liquid to harden thereon the volatile impurities being driven off or we may remove
the coated pieces of inert substance and bake them. Or we may place the pieces
of inert substance in a vessel and liquify the crystals of the said nitrate therein.
The coated pieces should be allowed to cool in an air tight chamber.
Although we have described the invention with special reference to barium
oxide it may also be used for the preparation of other substances such as manganates,
permanganates, for instance to be used for the same purpose.
Dated this 10th day of October 1891
J. H. JOHNSON & Co.,
47, Lincoln's Inn Fields, London, W.C., Agents.
COMPLETE SPECIFICATION.
Improvements in the Preparation of Anhydrous Oxide of Barium, or
other substances of like properties, for use in the Separation of
Oxygen and Nitrogen of Atmospheric Air.
We BRINS OXYGEN COMPANY LIMITED of Connaught Mansions Victoria
Street in the City of Westminster and KENNETH SUTHERLAND MURRAY
of 21 Redbourne Street Chelsea in the County of London, Engineer 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:
In the use of anhydrous oxide of barium in the separation of oxygen and nitrogen
of atmospheric air it is desirable to present as large a surface of the oxide as
possible to the air. With the object of gaining a very extended surface we
coat cover or apply layers or coatings of the said oxide to a more or less inert
support such for instance as pieces of fire-clay, pumice-stone, iron or equivalent
substance which will have little or no injurious action on the oxide. This may
be effected in various ways, and we do not limit ourselves to particular ways of
effecting it. For instance we place the pieces of inert substance in a vessel and
heat them therein (a temperature of or about 160° Fahrenheit is suitable) and
liquefy the dried crystals of nitrate of baryta therein and around the said pieces
whilst the said high temperature is maintained or we heat the crystals of nitrate
of baryta in a crucible or like vessel to a high temperature so as to liquefy them

page_text: .
and we dip the pieces of inert substance thereinto or we pour the liquefied nitrate
of baryta over the said pieces of inert substance. We prefer generally to previously
heat the pieces and this is especially so when we pour the liquefied nitrate of
baryta over the said pieces. The first heating or liquefying of the crystals of
nitrate of baryta drives off the bulk of the impurities. By maintaining the same
or about the same temperature further volatile impurities are driven off. and the
coating hardens on the said pieces. This further heating may be conducted in the
same or in a separate vessel. The coated pieces should be allowed to cool in an air
tight chamber.
Although we have described the invention with special reference to barium-oxide
it may also be used in a similar way for the preparation of other substances (such
as manganates or permanganates for instance) to be used for the same purpose.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed we declare that what
we claim is:-
The preparation of anhydrous oxide of barium or other substances of like
properties, employed in the separation of oxygen and nitrogen of atmospheric air
by coating covering or applying layers or coatings of the said substances to pieces
of inert material substantially as hereinbefore described.
Dated this 1st do— of Tul- 1000
J. H. JOHNSON & Co.,
Agents.